{"id":"CVE-2024-50228","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: shmem: fix data-race in shmem_getattr()\n\nI got the following KCSAN report during syzbot testing:\n\n==================================================================\nBUG: KCSAN: data-race in generic_fillattr / inode_set_ctime_current\n\nwrite to 0xffff888102eb3260 of 4 bytes by task 6565 on cpu 1:\n inode_set_ctime_to_ts include/linux/fs.h:1638 [inline]\n inode_set_ctime_current+0x169/0x1d0 fs/inode.c:2626\n shmem_mknod+0x117/0x180 mm/shmem.c:3443\n shmem_create+0x34/0x40 mm/shmem.c:3497\n lookup_open fs/namei.c:3578 [inline]\n open_last_lookups fs/namei.c:3647 [inline]\n path_openat+0xdbc/0x1f00 fs/namei.c:3883\n do_filp_open+0xf7/0x200 fs/namei.c:3913\n do_sys_openat2+0xab/0x120 fs/open.c:1416\n do_sys_open fs/open.c:1431 [inline]\n __do_sys_openat fs/open.c:1447 [inline]\n __se_sys_openat fs/open.c:1442 [inline]\n __x64_sys_openat+0xf3/0x120 fs/open.c:1442\n x64_sys_call+0x1025/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:258\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x54/0x120 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nread to 0xffff888102eb3260 of 4 bytes by task 3498 on cpu 0:\n inode_get_ctime_nsec include/linux/fs.h:1623 [inline]\n inode_get_ctime include/linux/fs.h:1629 [inline]\n generic_fillattr+0x1dd/0x2f0 fs/stat.c:62\n shmem_getattr+0x17b/0x200 mm/shmem.c:1157\n vfs_getattr_nosec fs/stat.c:166 [inline]\n vfs_getattr+0x19b/0x1e0 fs/stat.c:207\n vfs_statx_path fs/stat.c:251 [inline]\n vfs_statx+0x134/0x2f0 fs/stat.c:315\n vfs_fstatat+0xec/0x110 fs/stat.c:341\n __do_sys_newfstatat fs/stat.c:505 [inline]\n __se_sys_newfstatat+0x58/0x260 fs/stat.c:499\n __x64_sys_newfstatat+0x55/0x70 fs/stat.c:499\n x64_sys_call+0x141f/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:263\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x54/0x120 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nvalue changed: 0x2755ae53 -\u003e 0x27ee44d3\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 UID: 0 PID: 3498 Comm: udevd Not tainted 6.11.0-rc6-syzkaller-00326-gd1f2d51b711a-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\n==================================================================\n\nWhen calling generic_fillattr(), if you don't hold read lock, data-race\nwill occur in inode member variables, which can cause unexpected\nbehavior.\n\nSince there is no special protection when shmem_getattr() calls\ngeneric_fillattr(), data-race occurs by functions such as shmem_unlink()\nor shmem_mknod(). This can cause unexpected results, so commenting it out\nis not enough.\n\nTherefore, when calling generic_fillattr() from shmem_getattr(), it is\nappropriate to protect the inode using inode_lock_shared() and\ninode_unlock_shared() to prevent data-race.","modified":"2026-03-11T07:53:43.299322550Z","published":"2024-11-09T11:15:08Z","withdrawn":"2024-11-28T21:43:24.457619Z","related":["MGASA-2024-0368","MGASA-2024-0369","SUSE-SU-2024:4314-1","SUSE-SU-2024:4316-1","SUSE-SU-2025:0117-1","SUSE-SU-2025:0153-1","SUSE-SU-2025:0154-1","SUSE-SU-2025:0236-1","SUSE-SU-2025:0289-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/3d9528484480e8f4979b3a347930ed383be99f89"},{"type":"FIX","url":"https://git.kernel.org/stable/c/7cc30ada84323be19395094d567579536e0d187e"},{"type":"FIX","url":"https://git.kernel.org/stable/c/82cae1e30bd940253593c2d4f16d88343d1358f4"},{"type":"FIX","url":"https://git.kernel.org/stable/c/9fb9703cd43ee20a6de8ccdef991677b7274cec0"},{"type":"FIX","url":"https://git.kernel.org/stable/c/bda1a99a0dd644f31a87d636ac624eeb975cb65a"},{"type":"FIX","url":"https://git.kernel.org/stable/c/d949d1d14fa281ace388b1de978e8f2cd52875cf"},{"type":"FIX","url":"https://git.kernel.org/stable/c/edd1f905050686fdc4cfe233d818469fdf7d5ff8"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ffd56612566bc23877c8f45def2801f3324a222a"},{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50228"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:11","purl":"pkg:deb/debian/linux?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.10.103-1","5.10.103-1~bpo10+1","5.10.106-1","5.10.113-1","5.10.120-1","5.10.120-1~bpo10+1","5.10.127-1","5.10.127-2","5.10.127-2~bpo10+1","5.10.136-1","5.10.140-1","5.10.148-1","5.10.149-1","5.10.149-2","5.10.158-1","5.10.158-2","5.10.162-1","5.10.178-1","5.10.178-2","5.10.178-3","5.10.179-1","5.10.179-2","5.10.179-3","5.10.179-4","5.10.179-5","5.10.191-1","5.10.197-1","5.10.205-1","5.10.205-2","5.10.209-1","5.10.209-2","5.10.216-1","5.10.218-1","5.10.221-1","5.10.223-1","5.10.226-1","5.10.46-4","5.10.46-5","5.10.70-1","5.10.70-1~bpo10+1","5.10.84-1","5.10.92-1","5.10.92-1~bpo10+1","5.10.92-2","5.13.12-1~exp1","5.13.9-1~exp1","5.13.9-1~exp2","5.14-1~exp1","5.14-1~exp2","5.14.1-1~exp1","5.14.12-1","5.14.16-1","5.14.2-1~exp1","5.14.3-1~exp1","5.14.6-1","5.14.6-2","5.14.6-3","5.14.9-1","5.14.9-2","5.14.9-2~bpo11+1","5.15-1~exp1","5.15.1-1~exp1","5.15.15-1","5.15.15-2","5.15.15-2~bpo11+1","5.15.2-1~exp1","5.15.3-1","5.15.5-1","5.15.5-2","5.15.5-2~bpo11+1","5.16.10-1","5.16.11-1","5.16.11-1~bpo11+1","5.16.12-1","5.16.12-1~bpo11+1","5.16.14-1","5.16.18-1","5.16.3-1~exp1","5.16.4-1~exp1","5.16.7-1","5.16.7-2","5.16~rc1-1~exp1","5.16~rc3-1~exp1","5.16~rc4-1~exp1","5.16~rc5-1~exp1","5.16~rc6-1~exp1","5.16~rc7-1~exp1","5.16~rc8-1~exp1","5.17.1-1~exp1","5.17.11-1","5.17.3-1","5.17.6-1","5.17~rc3-1~exp1","5.17~rc4-1~exp1","5.17~rc5-1~exp1","5.17~rc6-1~exp1","5.17~rc7-1~exp1","5.17~rc8-1~exp1","5.18-1~exp1","5.18.14-1","5.18.14-1~bpo11+1","5.18.16-1","5.18.16-1~bpo11+1","5.18.2-1","5.18.2-1~bpo11+1","5.18.5-1","5.19-1~exp1","5.19.11-1","5.19.11-1~bpo11+1","5.19.6-1","5.19~rc4-1~exp1","5.19~rc6-1~exp1","6.0-1~exp1","6.0.10-1","6.0.10-2","6.0.12-1","6.0.12-1+alpha","6.0.12-1~bpo11+1","6.0.2-1","6.0.3-1","6.0.3-1~bpo11+1","6.0.5-1","6.0.6-1","6.0.6-2","6.0.7-1","6.0.8-1","6.0~rc7-1~exp1","6.1.1-1~exp1","6.1.1-1~exp2","6.1.106-1","6.1.106-2","6.1.106-3","6.1.11-1","6.1.112-1","6.1.115-1","6.1.12-1","6.1.12-1~bpo11+1","6.1.15-1","6.1.15-1~bpo11+1","6.1.2-1~exp1","6.1.20-1","6.1.20-1~bpo11+1","6.1.20-2","6.1.20-2~bpo11+1","6.1.25-1","6.1.27-1","6.1.27-1~bpo11+1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.4-1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.7-1","6.1.76-1","6.1.76-1~bpo11+1","6.1.8-1","6.1.8-1+sh4","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1","6.10-1~exp1","6.10.1-1~exp1","6.10.11-1","6.10.11-1~bpo12+1","6.10.12-1","6.10.3-1","6.10.4-1","6.10.6-1","6.10.6-1~bpo12+1","6.10.7-1","6.10.9-1","6.11-1~exp1","6.11.10-1","6.11.2-1","6.11.4-1","6.11.5-1","6.11.5-1~bpo12+1","6.11.6-1","6.11.7-1","6.11.9-1","6.11~rc4-1~exp1","6.11~rc5-1~exp1","6.12~rc6-1~exp1","6.1~rc3-1~exp1","6.1~rc5-1~exp1","6.1~rc6-1~exp1","6.1~rc7-1~exp1","6.1~rc8-1~exp1","6.3.1-1~exp1","6.3.11-1","6.3.2-1~exp1","6.3.4-1~exp1","6.3.5-1~exp1","6.3.7-1","6.3.7-1~bpo12+1","6.4.1-1~exp1","6.4.11-1","6.4.13-1","6.4.4-1","6.4.4-1~bpo12+1","6.4.4-2","6.4.4-3","6.4.4-3~bpo12+1","6.4~rc6-1~exp1","6.4~rc7-1~exp1","6.5.1-1~exp1","6.5.10-1","6.5.10-1~bpo12+1","6.5.13-1","6.5.3-1","6.5.3-1~bpo12+1","6.5.6-1","6.5.8-1","6.5~rc4-1~exp1","6.5~rc6-1~exp1","6.5~rc7-1~exp1","6.6.11-1","6.6.13-1","6.6.13-1~bpo12+1","6.6.15-1","6.6.15-2","6.6.3-1~exp1","6.6.4-1~exp1","6.6.7-1~exp1","6.6.8-1","6.6.9-1","6.7-1~exp1","6.7.1-1~exp1","6.7.12-1","6.7.12-1~bpo12+1","6.7.4-1~exp1","6.7.7-1","6.7.9-1","6.7.9-2","6.8.11-1","6.8.12-1","6.8.12-1~bpo12+1","6.8.9-1","6.9.10-1","6.9.10-1~bpo12+1","6.9.11-1","6.9.12-1","6.9.2-1~exp1","6.9.7-1","6.9.7-1~bpo12+1","6.9.8-1","6.9.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-50228.json"}},{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.119-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-50228.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1","6.10-1~exp1","6.10.1-1~exp1","6.10.11-1","6.10.11-1~bpo12+1","6.10.12-1","6.10.3-1","6.10.4-1","6.10.6-1","6.10.6-1~bpo12+1","6.10.7-1","6.10.9-1","6.11-1~exp1","6.11.2-1","6.11.4-1","6.11.5-1","6.11.5-1~bpo12+1","6.11.6-1","6.11~rc4-1~exp1","6.11~rc5-1~exp1","6.3.1-1~exp1","6.3.11-1","6.3.2-1~exp1","6.3.4-1~exp1","6.3.5-1~exp1","6.3.7-1","6.3.7-1~bpo12+1","6.4.1-1~exp1","6.4.11-1","6.4.13-1","6.4.4-1","6.4.4-1~bpo12+1","6.4.4-2","6.4.4-3","6.4.4-3~bpo12+1","6.4~rc6-1~exp1","6.4~rc7-1~exp1","6.5.1-1~exp1","6.5.10-1","6.5.10-1~bpo12+1","6.5.13-1","6.5.3-1","6.5.3-1~bpo12+1","6.5.6-1","6.5.8-1","6.5~rc4-1~exp1","6.5~rc6-1~exp1","6.5~rc7-1~exp1","6.6.11-1","6.6.13-1","6.6.13-1~bpo12+1","6.6.15-1","6.6.15-2","6.6.3-1~exp1","6.6.4-1~exp1","6.6.7-1~exp1","6.6.8-1","6.6.9-1","6.7-1~exp1","6.7.1-1~exp1","6.7.12-1","6.7.12-1~bpo12+1","6.7.4-1~exp1","6.7.7-1","6.7.9-1","6.7.9-2","6.8.11-1","6.8.12-1","6.8.12-1~bpo12+1","6.8.9-1","6.9.10-1","6.9.10-1~bpo12+1","6.9.11-1","6.9.12-1","6.9.2-1~exp1","6.9.7-1","6.9.7-1~bpo12+1","6.9.8-1","6.9.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-50228.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}