{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-50225", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.973Z", "datePublished": "2024-11-09T10:14:36.065Z", "dateUpdated": "2026-05-11T20:47:49.400Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:47:49.400Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix error propagation of split bios\n\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n\n* Case 1. Immediate (or quick) end_bio with an error\n\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\n\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion. That will result in NULL pointer\ndereference.\n\nThat bug is easily reproducible by running btrfs/146 on zoned devices [1]\nand it shows the following trace.\n\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n Workqueue: writeback wb_workfn (flush-btrfs-5)\n RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs]\n BTRFS error (device dm-0): bdev /dev/mapper/error-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\n RSP: 0018:ffffc9000006f248 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\n RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\n RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\n R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\n R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\n FS: 0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n ? __die_body.cold+0x19/0x26\n ? page_fault_oops+0x13e/0x2b0\n ? _printk+0x58/0x73\n ? do_user_addr_fault+0x5f/0x750\n ? exc_page_fault+0x76/0x240\n ? asm_exc_page_fault+0x22/0x30\n ? btrfs_bio_end_io+0xae/0xc0 [btrfs]\n ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs]\n btrfs_orig_write_end_io+0x51/0x90 [btrfs]\n dm_submit_bio+0x5c2/0xa50 [dm_mod]\n ? find_held_lock+0x2b/0x80\n ? blk_try_enter_queue+0x90/0x1e0\n __submit_bio+0xe0/0x130\n ? ktime_get+0x10a/0x160\n ? lockdep_hardirqs_on+0x74/0x100\n submit_bio_noacct_nocheck+0x199/0x410\n btrfs_submit_bio+0x7d/0x150 [btrfs]\n btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]\n ? lockdep_hardirqs_on+0x74/0x100\n ? __folio_start_writeback+0x10/0x2c0\n btrfs_submit_bbio+0x1c/0x40 [btrfs]\n submit_one_bio+0x44/0x60 [btrfs]\n submit_extent_folio+0x13f/0x330 [btrfs]\n ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs]\n extent_writepage_io+0x18b/0x360 [btrfs]\n extent_write_locked_range+0x17c/0x340 [btrfs]\n ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs]\n run_delalloc_cow+0x71/0xd0 [btrfs]\n btrfs_run_delalloc_range+0x176/0x500 [btrfs]\n ? find_lock_delalloc_range+0x119/0x260 [btrfs]\n writepage_delalloc+0x2ab/0x480 [btrfs]\n extent_write_cache_pages+0x236/0x7d0 [btrfs]\n btrfs_writepages+0x72/0x130 [btrfs]\n do_writepages+0xd4/0x240\n ? find_held_lock+0x2b/0x80\n ? wbc_attach_and_unlock_inode+0x12c/0x290\n ? wbc_attach_and_unlock_inode+0x12c/0x29\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/bio.c", "fs/btrfs/bio.h"], "versions": [{"version": "852eee62d31abd695cd43e1b875d664ed292a8ca", "lessThan": "22833d89b780ba0f9f66e19c477e7decf638edce", "status": "affected", "versionType": "git"}, {"version": "852eee62d31abd695cd43e1b875d664ed292a8ca", "lessThan": "d48e1dea3931de64c26717adc2b89743c7ab6594", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/bio.c", "fs/btrfs/bio.h"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.7", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.11.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/22833d89b780ba0f9f66e19c477e7decf638edce"}, {"url": "https://git.kernel.org/stable/c/d48e1dea3931de64c26717adc2b89743c7ab6594"}], "title": "btrfs: fix error propagation of split bios", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50225", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T20:16:54.858322Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:17:28.196Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50225", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T20:16:54.858322Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T15:23:15.917Z"}}], "cna": {"title": "btrfs: fix error propagation of split bios", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "852eee62d31abd695cd43e1b875d664ed292a8ca", "lessThan": "22833d89b780ba0f9f66e19c477e7decf638edce", "versionType": "git"}, {"status": "affected", "version": "852eee62d31abd695cd43e1b875d664ed292a8ca", "lessThan": "d48e1dea3931de64c26717adc2b89743c7ab6594", "versionType": "git"}], "programFiles": ["fs/btrfs/bio.c", "fs/btrfs/bio.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"status": "unaffected", "version": "0", "lessThan": "6.3", "versionType": "semver"}, {"status": "unaffected", "version": "6.11.7", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/btrfs/bio.c", "fs/btrfs/bio.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/22833d89b780ba0f9f66e19c477e7decf638edce"}, {"url": "https://git.kernel.org/stable/c/d48e1dea3931de64c26717adc2b89743c7ab6594"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix error propagation of split bios\n\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n\n* Case 1. Immediate (or quick) end_bio with an error\n\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\n\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion. That will result in NULL pointer\ndereference.\n\nThat bug is easily reproducible by running btrfs/146 on zoned devices [1]\nand it shows the following trace.\n\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n Workqueue: writeback wb_workfn (flush-btrfs-5)\n RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs]\n BTRFS error (device dm-0): bdev /dev/mapper/error-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\n RSP: 0018:ffffc9000006f248 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\n RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\n RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\n R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\n R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\n FS: 0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n ? __die_body.cold+0x19/0x26\n ? page_fault_oops+0x13e/0x2b0\n ? _printk+0x58/0x73\n ? do_user_addr_fault+0x5f/0x750\n ? exc_page_fault+0x76/0x240\n ? asm_exc_page_fault+0x22/0x30\n ? btrfs_bio_end_io+0xae/0xc0 [btrfs]\n ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs]\n btrfs_orig_write_end_io+0x51/0x90 [btrfs]\n dm_submit_bio+0x5c2/0xa50 [dm_mod]\n ? find_held_lock+0x2b/0x80\n ? blk_try_enter_queue+0x90/0x1e0\n __submit_bio+0xe0/0x130\n ? ktime_get+0x10a/0x160\n ? lockdep_hardirqs_on+0x74/0x100\n submit_bio_noacct_nocheck+0x199/0x410\n btrfs_submit_bio+0x7d/0x150 [btrfs]\n btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]\n ? lockdep_hardirqs_on+0x74/0x100\n ? __folio_start_writeback+0x10/0x2c0\n btrfs_submit_bbio+0x1c/0x40 [btrfs]\n submit_one_bio+0x44/0x60 [btrfs]\n submit_extent_folio+0x13f/0x330 [btrfs]\n ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs]\n extent_writepage_io+0x18b/0x360 [btrfs]\n extent_write_locked_range+0x17c/0x340 [btrfs]\n ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs]\n run_delalloc_cow+0x71/0xd0 [btrfs]\n btrfs_run_delalloc_range+0x176/0x500 [btrfs]\n ? find_lock_delalloc_range+0x119/0x260 [btrfs]\n writepage_delalloc+0x2ab/0x480 [btrfs]\n extent_write_cache_pages+0x236/0x7d0 [btrfs]\n btrfs_writepages+0x72/0x130 [btrfs]\n do_writepages+0xd4/0x240\n ? find_held_lock+0x2b/0x80\n ? wbc_attach_and_unlock_inode+0x12c/0x290\n ? wbc_attach_and_unlock_inode+0x12c/0x29\n---truncated---"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11.7", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12", "versionStartIncluding": "6.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T09:49:11.405Z"}}}, "cveMetadata": {"cveId": "CVE-2024-50225", "state": "PUBLISHED", "dateUpdated": "2025-10-01T20:17:28.196Z", "dateReserved": "2024-10-21T19:36:19.973Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-11-09T10:14:36.065Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5972B133-90E2-44DE-AE0B-A0939F0D914F", "versionEndExcluding": "6.11.7", "versionStartIncluding": "6.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*", "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*", "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix error propagation of split bios\n\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n\n* Case 1. Immediate (or quick) end_bio with an error\n\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\n\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion. That will result in NULL pointer\ndereference.\n\nThat bug is easily reproducible by running btrfs/146 on zoned devices [1]\nand it shows the following trace.\n\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\n Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n Workqueue: writeback wb_workfn (flush-btrfs-5)\n RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs]\n BTRFS error (device dm-0): bdev /dev/mapper/error-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\n RSP: 0018:ffffc9000006f248 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\n RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\n RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\n R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\n R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\n FS: 0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n ? __die_body.cold+0x19/0x26\n ? page_fault_oops+0x13e/0x2b0\n ? _printk+0x58/0x73\n ? do_user_addr_fault+0x5f/0x750\n ? exc_page_fault+0x76/0x240\n ? asm_exc_page_fault+0x22/0x30\n ? btrfs_bio_end_io+0xae/0xc0 [btrfs]\n ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs]\n btrfs_orig_write_end_io+0x51/0x90 [btrfs]\n dm_submit_bio+0x5c2/0xa50 [dm_mod]\n ? find_held_lock+0x2b/0x80\n ? blk_try_enter_queue+0x90/0x1e0\n __submit_bio+0xe0/0x130\n ? ktime_get+0x10a/0x160\n ? lockdep_hardirqs_on+0x74/0x100\n submit_bio_noacct_nocheck+0x199/0x410\n btrfs_submit_bio+0x7d/0x150 [btrfs]\n btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]\n ? lockdep_hardirqs_on+0x74/0x100\n ? __folio_start_writeback+0x10/0x2c0\n btrfs_submit_bbio+0x1c/0x40 [btrfs]\n submit_one_bio+0x44/0x60 [btrfs]\n submit_extent_folio+0x13f/0x330 [btrfs]\n ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs]\n extent_writepage_io+0x18b/0x360 [btrfs]\n extent_write_locked_range+0x17c/0x340 [btrfs]\n ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs]\n run_delalloc_cow+0x71/0xd0 [btrfs]\n btrfs_run_delalloc_range+0x176/0x500 [btrfs]\n ? find_lock_delalloc_range+0x119/0x260 [btrfs]\n writepage_delalloc+0x2ab/0x480 [btrfs]\n extent_write_cache_pages+0x236/0x7d0 [btrfs]\n btrfs_writepages+0x72/0x130 [btrfs]\n do_writepages+0xd4/0x240\n ? find_held_lock+0x2b/0x80\n ? wbc_attach_and_unlock_inode+0x12c/0x290\n ? wbc_attach_and_unlock_inode+0x12c/0x29\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corregir la propagaci\u00f3n de errores de bios divididas El prop\u00f3sito de btrfs_bbio_propagate_error() debe ser propagar un error de bio dividida a su btrfs_bio original y comunicar el error a la capa superior. Sin embargo, no est\u00e1 funcionando bien en algunos casos. * Caso 1. End_bio inmediato (o r\u00e1pido) con un error Cuando btrfs env\u00eda btrfs_bio a dispositivos reflejados, btrfs llama a btrfs_bio_end_io() cuando se completan todos los bios reflejados. Si ese btrfs_bio se dividi\u00f3, es de btrfs_clone_bioset y su funci\u00f3n end_io es btrfs_orig_write_end_io. Para este caso, btrfs_bbio_propagate_error() accede al contexto bio de orig_bbio para aumentar el recuento de errores. Eso funciona bien en la mayor\u00eda de los casos. Sin embargo, si se llama a end_io lo suficientemente r\u00e1pido, es posible que el contexto bio de orig_bbio (la parte restante despu\u00e9s de la divisi\u00f3n) no se configure correctamente en ese momento. Dado que el contexto bio se configura cuando se env\u00eda orig_bbio (el \u00faltimo btrfs_bio) a los dispositivos, puede que sea demasiado tarde para que se complete la divisi\u00f3n anterior de btrfs_bio. Eso dar\u00e1 como resultado la desreferencia del puntero NULL. Ese error se puede reproducir f\u00e1cilmente ejecutando btrfs/146 en dispositivos zonificados [1] y muestra el siguiente rastro. [1] Necesita la funci\u00f3n raid-stripe-tree, ya que crea el sistema de archivos \"-d raid0 -m raid1\". ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000020 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 No contaminado 6.11.0-rc7-BTRFS-ZNS+ #474 Nombre del hardware: Bochs Bochs, BIOS Bochs 01/01/2011 Cola de trabajo: escritura diferida wb_workfn (flush-btrfs-5) RIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs] Error BTRFS (dispositivo dm-0): bdev /dev/mapper/error-test errores: wr 2, rd 0, vaciado 0, corrupto 0, generaci\u00f3n 0 RSP: 0018:ffffc9000006f248 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080 RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58 R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158 FS: 000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0 DR0: 00000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: ? __die_body.cold+0x19/0x26 ? page_fault_oops+0x13e/0x2b0 ? _printk+0x58/0x73 ? do_user_addr_fault+0x5f/0x750 ? btrfs_log_dev_io_error+0x7f/0x90 [btrfs] btrfs_orig_write_end_io+0x51/0x90 [btrfs] dm_submit_bio+0x5c2/0xa50 [dm_mod] ? blk_try_enter_queue+0x90/0x1e0 __submit_bio+0xe0/0x130 ? ktime_get+0x10a/0x160 ? lockdep_hardirqs_on+0x74/0x100 submit_bio_noacct_nocheck+0x199/0x410 btrfs_submit_bio+0x7d/0x150 [btrfs] btrfs_submit_chunk+0x1a1/0x6d0 [btrfs]? lockdep_hardirqs_on+0x74/0x100? __folio_start_writeback+0x10/0x2c0 btrfs_submit_bbio+0x1c/0x40 [btrfs] submit_one_bio+0x44/0x60 [btrfs] submit_extent_folio+0x13f/0x330 [btrfs] ? btrfs_set_range_writeback+0xa3/0xd0 [btrfs] extend_writepage_io+0x18b/0x360 [btrfs] extend_write_locked_range+0x17c/0x340 [btrfs] ? __pfx_end_bbio_data_write+0x10/0x10 [btrfs] run_delalloc_cow+0x71/0xd0 [btrfs] btrfs_run_delalloc_range+0x176/0x500 [btrfs] ? buscar_bloqueo_desbloqueado_rango+0x119/0x260 [btrfs] escribir_p\u00e1gina_desbloqueado+0x2ab/0x480 [btrfs] extensi\u00f3n_escritura_p\u00e1ginas_cach\u00e9+0x236/0x7d0 [btrfs] btrfs_escritura_p\u00e1ginas+0x72/0x130 [btrfs] hacer_escritura_p\u00e1ginas+0xd4/0x240 ? buscar_bloqueo_retenido+0x2b/0x80 ? wbc_adjuntar_y_desbloquear_inodo+0x12c/0x290 ? wbc_adjuntar_y_desbloquear_inodo+0x12c/0x29 ---truncado---"}], "id": "CVE-2024-50225", "lastModified": "2025-10-01T21:16:07.720", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-11-09T11:15:07.990", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22833d89b780ba0f9f66e19c477e7decf638edce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d48e1dea3931de64c26717adc2b89743c7ab6594"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: btrfs: fix error propagation of split bios", "id": "2324885", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2324885"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: fix error propagation of split bios\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n* Case 1. Immediate (or quick) end_bio with an error\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion. That will result in NULL pointer\ndereference.\nThat bug is easily reproducible by running btrfs/146 on zoned devices [1]\nand it shows the following trace.\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\nBUG: kernel NULL pointer dereference, address: 0000000000000020\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 0 P4D 0\nOops: Oops: 0000 [#1] PREEMPT SMP PTI\nCPU: 1 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\nHardware name: Bochs Bochs, BIOS Bochs 01/01/2011\nWorkqueue: writeback wb_workfn (flush-btrfs-5)\nRIP: 0010:btrfs_bio_end_io+0xae/0xc0 [btrfs]\nBTRFS error (device dm-0): bdev /dev/mapper/error-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\nRSP: 0018:ffffc9000006f248 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\nRDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\nRBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\nR10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\nR13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\nFS: 0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\n? __die_body.cold+0x19/0x26\n? page_fault_oops+0x13e/0x2b0\n? _printk+0x58/0x73\n? do_user_addr_fault+0x5f/0x750\n? exc_page_fault+0x76/0x240\n? asm_exc_page_fault+0x22/0x30\n? btrfs_bio_end_io+0xae/0xc0 [btrfs]\n? btrfs_log_dev_io_error+0x7f/0x90 [btrfs]\nbtrfs_orig_write_end_io+0x51/0x90 [btrfs]\ndm_submit_bio+0x5c2/0xa50 [dm_mod]\n? find_held_lock+0x2b/0x80\n? blk_try_enter_queue+0x90/0x1e0\n__submit_bio+0xe0/0x130\n? ktime_get+0x10a/0x160\n? lockdep_hardirqs_on+0x74/0x100\nsubmit_bio_noacct_nocheck+0x199/0x410\nbtrfs_submit_bio+0x7d/0x150 [btrfs]\nbtrfs_submit_chunk+0x1a1/0x6d0 [btrfs]\n? lockdep_hardirqs_on+0x74/0x100\n? __folio_start_writeback+0x10/0x2c0\nbtrfs_submit_bbio+0x1c/0x40 [btrfs]\nsubmit_one_bio+0x44/0x60 [btrfs]\nsubmit_extent_folio+0x13f/0x330 [btrfs]\n? btrfs_set_range_writeback+0xa3/0xd0 [btrfs]\nextent_writepage_io+0x18b/0x360 [btrfs]\nextent_write_locked_range+0x17c/0x340 [btrfs]\n? __pfx_end_bbio_data_write+0x10/0x10 [btrfs]\nrun_delalloc_cow+0x71/0xd0 [btrfs]\nbtrfs_run_delalloc_range+0x176/0x500 [btrfs]\n? find_lock_delalloc_range+0x119/0x260 [btrfs]\nwritepage_delalloc+0x2ab/0x480 [btrfs]\nextent_write_cache_pages+0x236/0x7d0 [btrfs]\nbtrfs_writepages+0x72/0x130 [btrfs]\ndo_writepages+0xd4/0x240\n? find_held_lock+0x2b/0x80\n? wbc_attach_and_unlock_inode+0x12c/0x290\n? wbc_attach_and_unlock_inode+0x12c/0x29\n---truncated---"], "name": "CVE-2024-50225", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50225\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50225\nhttps://lore.kernel.org/linux-cve-announce/2024110927-CVE-2024-50225-c42a@gregkh/T"], "threat_severity": "Moderate"}

{}