| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/07/30 | upstream (ToT) | 4b290aae788e | C | [report] KASAN: slab-use-after-free Read in v4l2_fh_open |
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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/07/30 | upstream (ToT) | 4b290aae788e | C | [report] KASAN: slab-use-after-free Read in v4l2_fh_open |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | KASAN: use-after-free Read in v4l2_fh_open usb media | 19 | C | unreliable | inconclusive | 3457 | 7h38m | 1816d | 0/29 | upstream: reported C repro on 2021/02/15 15:18 |
| linux-5.15 | KASAN: use-after-free Read in v4l2_fh_open origin:upstream | 19 | C | 212 | 1d03h | 553d | 0/3 | upstream: reported C repro on 2024/08/01 11:01 | ||
| linux-6.1 | KASAN: use-after-free Read in v4l2_fh_open origin:upstream | 19 | C | 59 | 14d | 532d | 0/3 | upstream: reported C repro on 2024/08/22 03:36 |
================================================================== BUG: KASAN: slab-use-after-free in v4l2_fh_init drivers/media/v4l2-core/v4l2-fh.c:25 [inline] BUG: KASAN: slab-use-after-free in v4l2_fh_open+0xca/0x430 drivers/media/v4l2-core/v4l2-fh.c:63 Read of size 8 at addr ffff88807b840738 by task v4l_id/6047 CPU: 0 PID: 6047 Comm: v4l_id Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 v4l2_fh_init drivers/media/v4l2-core/v4l2-fh.c:25 [inline] v4l2_fh_open+0xca/0x430 drivers/media/v4l2-core/v4l2-fh.c:63 em28xx_v4l2_open+0x157/0x980 drivers/media/usb/em28xx/em28xx-video.c:2153 v4l2_open+0x212/0x360 drivers/media/v4l2-core/v4l2-dev.c:427 chrdev_open+0x59e/0x670 fs/char_dev.c:414 do_dentry_open+0x8c6/0x1500 fs/open.c:929 do_open fs/namei.c:3640 [inline] path_openat+0x274b/0x3190 fs/namei.c:3797 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f30806a7407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffcd1ef6860 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f3080ead880 RCX: 00007f30806a7407 RDX: 0000000000000000 RSI: 00007ffcd1ef6f1b RDI: ffffffffffffff9c RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffcd1ef6ab0 R14: 00007f308100c000 R15: 0000561bf81354d8 </TASK> Allocated by task 6010: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] em28xx_v4l2_init+0x10b/0x2e70 drivers/media/usb/em28xx/em28xx-video.c:2532 em28xx_init_extension+0x11c/0x1b0 drivers/media/usb/em28xx/em28xx-core.c:1116 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Freed by task 6010: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:53 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] __kmem_cache_free+0xba/0x1f0 mm/slub.c:3843 em28xx_free_v4l2 drivers/media/usb/em28xx/em28xx-video.c:2118 [inline] kref_put include/linux/kref.h:65 [inline] em28xx_v4l2_init+0x1670/0x2e70 drivers/media/usb/em28xx/em28xx-video.c:2901 em28xx_init_extension+0x11c/0x1b0 drivers/media/usb/em28xx/em28xx-core.c:1116 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 The buggy address belongs to the object at ffff88807b840000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 1848 bytes inside of freed 8192-byte region [ffff88807b840000, ffff88807b842000) The buggy address belongs to the physical page: page:ffffea0001ee1000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b840 head:ffffea0001ee1000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888017842280 ffffea0000be0c00 dead000000000004 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5524, tgid 5524 (S50sshd), ts 58329439710, free_ts 58233715521 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x1a2/0x260 mm/slub.c:3534 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x1104/0x1f10 security/tomoyo/audit.c:264 tomoyo_supervisor+0x32d/0x1080 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x14a/0x1e0 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1594/0x1a60 security/tomoyo/domain.c:881 tomoyo_bprm_check_security+0x116/0x170 security/tomoyo/tomoyo.c:101 security_bprm_check+0x62/0xa0 security/security.c:1103 search_binary_handler fs/exec.c:1763 [inline] exec_binprm fs/exec.c:1817 [inline] bprm_execve+0xa51/0x16f0 fs/exec.c:1892 do_execveat_common+0x51b/0x6c0 fs/exec.c:1998 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x31d/0x410 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] __kmem_cache_alloc_node+0x13e/0x260 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa4/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x20f/0x4b0 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x120 security/security.c:2153 vfs_getattr fs/stat.c:173 [inline] vfs_fstat fs/stat.c:198 [inline] __do_sys_newfstat fs/stat.c:473 [inline] __se_sys_newfstat fs/stat.c:470 [inline] __x64_sys_newfstat+0x101/0x1f0 fs/stat.c:470 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 Memory state around the buggy address: ffff88807b840600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807b840680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807b840700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807b840780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807b840800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/01/16 19:56 | linux-6.6.y | c596736dadab | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2026/01/15 17:33 | linux-6.6.y | c596736dadab | d6526ea3 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2025/09/30 13:07 | linux-6.6.y | 147338df3487 | 86341da6 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2025/09/30 12:21 | linux-6.6.y | 147338df3487 | 86341da6 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2025/09/30 11:38 | linux-6.6.y | 147338df3487 | 86341da6 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2025/07/28 00:12 | linux-6.6.y | dbcb8d8e4163 | fb8f743d | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | |
| 2026/01/22 00:22 | linux-6.6.y | cbb31f77b879 | 8fc37797 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/12/24 19:09 | linux-6.6.y | 5fa4793a2d2d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/12/19 14:23 | linux-6.6.y | 5fa4793a2d2d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/12/11 10:40 | linux-6.6.y | 5fa4793a2d2d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/12/08 15:59 | linux-6.6.y | 5fa4793a2d2d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/12/07 05:42 | linux-6.6.y | 5fa4793a2d2d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/11/29 01:23 | linux-6.6.y | 1e89a1be4fe9 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/11/29 00:31 | linux-6.6.y | 1e89a1be4fe9 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/11/18 06:47 | linux-6.6.y | 0a805b6ea8cd | ef766cd7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/10/18 21:03 | linux-6.6.y | 0bbbd97a442d | 1c8c8cd8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/28 00:41 | linux-6.6.y | 147338df3487 | 001c9061 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/25 06:21 | linux-6.6.y | af1544b5d072 | 0abd0691 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/21 06:15 | linux-6.6.y | af1544b5d072 | 67c37560 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/20 07:49 | linux-6.6.y | af1544b5d072 | 67c37560 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/17 06:53 | linux-6.6.y | 60a9e718726f | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/04 02:05 | linux-6.6.y | cc1a1c5b404a | d291dd2d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/01 06:33 | linux-6.6.y | cc1a1c5b404a | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/01 06:32 | linux-6.6.y | cc1a1c5b404a | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/01 06:31 | linux-6.6.y | cc1a1c5b404a | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/09/01 06:31 | linux-6.6.y | cc1a1c5b404a | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/08/30 20:25 | linux-6.6.y | cc1a1c5b404a | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/08/27 00:08 | linux-6.6.y | bb9c90ab9c5a | e12e5ba4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/08/20 10:00 | linux-6.6.y | bb9c90ab9c5a | 79512909 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/08/17 23:54 | linux-6.6.y | bb9c90ab9c5a | 1804e95e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/08/11 01:28 | linux-6.6.y | 3a8ababb8b6a | 32a0e5ed | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/07/27 23:31 | linux-6.6.y | dbcb8d8e4163 | fb8f743d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/07/22 14:24 | linux-6.6.y | d96eb99e2f0e | 8e9d1dc1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open | ||
| 2025/06/29 09:48 | linux-6.6.y | 3f5b4c104b7d | fc9d8ee5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-6-kasan | KASAN: slab-use-after-free Read in v4l2_fh_open |