syzbot |
sign-in | mailing list | source | docs |
loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): mounting ext2 file system using the ext4 subsystem ================================================================== BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: use-after-free in __ext4_iget+0x2bb/0x3e50 fs/ext4/inode.c:4684 Read of size 8 at addr ffff88805f82a060 by task syz.2.5723/16574 CPU: 1 PID: 16574 Comm: syz.2.5723 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_igot_inode fs/ext4/inode.c:-1 [inline] __ext4_iget+0x2bb/0x3e50 fs/ext4/inode.c:4684 ext4_fill_super+0x73d4/0x95a0 fs/ext4/super.c:4866 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f64995f614a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f649784fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f649784fee0 RCX: 00007f64995f614a RDX: 0000200000000040 RSI: 0000200000000140 RDI: 00007f649784fea0 RBP: 0000200000000040 R08: 00007f649784fee0 R09: 0000000000000003 R10: 0000000000000003 R11: 0000000000000246 R12: 0000200000000140 R13: 00007f649784fea0 R14: 000000000000058e R15: 00002000000000c0 </TASK> Allocated by task 15602: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 reiserfs_alloc_inode+0x19/0xb0 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:261 [inline] iget5_locked+0x9e/0x250 fs/inode.c:1263 reiserfs_fill_super+0x122d/0x2440 fs/reiserfs/super.c:2057 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3011 [inline] call_rcu+0x189/0x950 kernel/rcu/tree.c:3091 destroy_inode fs/inode.c:316 [inline] evict+0x834/0x8d0 fs/inode.c:662 dispose_list fs/inode.c:680 [inline] evict_inodes+0x60c/0x6a0 fs/inode.c:734 generic_shutdown_super+0x93/0x300 fs/super.c:454 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Second to last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3011 [inline] call_rcu+0x189/0x950 kernel/rcu/tree.c:3091 destroy_inode fs/inode.c:316 [inline] evict+0x834/0x8d0 fs/inode.c:662 reiserfs_fill_super+0x14c4/0x2440 fs/reiserfs/super.c:2082 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88805f829a80 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1504 bytes inside of 1568-byte region [ffff88805f829a80, ffff88805f82a0a0) The buggy address belongs to the page: page:ffffea00017e0a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805f82b500 pfn:0x5f828 head:ffffea00017e0a00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888020342801 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8881469018c0 raw: ffff88805f82b500 000000008013000c 00000001ffffffff ffff888020342801 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4504, ts 80812481514, free_ts 79731207774 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5487 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3238 reiserfs_alloc_inode+0x19/0xb0 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:261 [inline] iget5_locked+0x9e/0x250 fs/inode.c:1263 reiserfs_fill_super+0x122d/0x2440 fs/reiserfs/super.c:2057 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 getname_flags+0xb5/0x500 fs/namei.c:138 user_path_at_empty+0x2a/0x190 fs/namei.c:2890 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x107/0x500 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x15f/0x200 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff88805f829f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805f829f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805f82a000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805f82a080: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff88805f82a100: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/01/27 10:32 | linux-5.15.y | 9eec9a14ee10 | 9a514c2f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/11/20 10:13 | linux-5.15.y | cc5ec8769306 | 2cc4c24a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/08/14 13:29 | linux-5.15.y | c79648372d02 | 5d8c2ac2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/08/12 17:50 | linux-5.15.y | c79648372d02 | 22ec1469 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/08/11 18:45 | linux-5.15.y | c79648372d02 | c06e8995 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/08/08 02:05 | linux-5.15.y | c79648372d02 | 6a893178 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/07/10 16:59 | linux-5.15.y | 2f693b607545 | 3cda49cf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/06/04 10:11 | linux-5.15.y | 98f47d0e9b8c | e565f08d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/06/02 05:14 | linux-5.15.y | 98f47d0e9b8c | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/05/24 03:48 | linux-5.15.y | 98f47d0e9b8c | ed351ea7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/05/09 00:41 | linux-5.15.y | 16fdf2c7111b | bb813bcc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/05/07 16:55 | linux-5.15.y | 16fdf2c7111b | dbf35fa1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/04/05 19:36 | linux-5.15.y | 0c935c049b5c | 1c65791e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/04/02 05:50 | linux-5.15.y | 0c935c049b5c | c799dfdd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/04/02 05:46 | linux-5.15.y | 0c935c049b5c | c799dfdd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/04/01 02:08 | linux-5.15.y | 0c935c049b5c | 36d76a97 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/03/18 14:42 | linux-5.15.y | 0c935c049b5c | 22a6c2b1 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/02/07 19:48 | linux-5.15.y | c16c81c81336 | ef44b750 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/12/13 20:33 | linux-5.15.y | 0a51d2d4527b | 7cbfbb3a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/08/09 17:18 | linux-5.15.y | 7e89efd3ae1c | a83d9288 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/07/21 09:47 | linux-5.15.y | 7c6d66f0266f | b88348e9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/04/12 02:14 | linux-5.15.y | cdfd0a7f0139 | 27de0a5c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/04/02 00:09 | linux-5.15.y | 9465fef4ae35 | 6baf5069 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/01/31 03:05 | linux-5.15.y | 6139f2a02fe0 | 7f400fcb | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/06/11 16:37 | linux-5.15.y | 1c700860e8bc | 98683f8f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/05/02 16:15 | linux-5.15.y | 16fdf2c7111b | b0714e37 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/03/29 17:09 | linux-5.15.y | 0c935c049b5c | d3999433 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/02/28 14:13 | linux-5.15.y | c16c81c81336 | 67cf5345 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/01/29 00:45 | linux-5.15.y | 003148680b79 | 865ef71e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/01/27 22:00 | linux-5.15.y | 003148680b79 | 18070896 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/01/23 18:05 | linux-5.15.y | 003148680b79 | 521b0ce3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/09/16 14:47 | linux-5.15.y | 3a5928702e71 | c673ca06 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/05/30 03:44 | linux-5.15.y | c61bd26ae81a | 34889ee3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/04/02 00:37 | linux-5.15.y | 9465fef4ae35 | 6baf5069 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/04/01 07:28 | linux-5.15.y | 9465fef4ae35 | 6baf5069 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2024/03/29 18:25 | linux-5.15.y | 9465fef4ae35 | c52bcb23 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: use-after-free Read in __ext4_iget | ||
| 2025/05/06 02:01 | linux-5.15.y | 16fdf2c7111b | ae98e6b9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2025/03/03 19:55 | linux-5.15.y | c16c81c81336 | c3901742 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2025/02/07 07:11 | linux-5.15.y | c16c81c81336 | 53657d1b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2025/07/28 14:00 | linux-5.15.y | c79648372d02 | 6654ea9c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2025/03/26 01:56 | linux-5.15.y | 0c935c049b5c | 89d30d73 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2025/01/24 20:34 | linux-5.15.y | 003148680b79 | 1293872d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2024/10/29 14:09 | linux-5.15.y | 74cdd62cb470 | 66aeb999 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: slab-out-of-bounds Read in __ext4_iget | ||
| 2024/07/08 03:47 | linux-5.15.y | f45bea23c39c | 2a40360c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan-arm64 | KASAN: slab-out-of-bounds Read in __ext4_iget |