Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported |
---|---|---|---|---|---|---|
possible deadlock in kernfs_seq_start kernfs | C | done | 15 | 22d | 288d |
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[syzbot] [overlayfs?] possible deadlock in seq_read_iter (4) | 1 (2) | 2024/05/27 09:33 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-5.15 | possible deadlock in seq_read_iter | 43 | 17d | 288d | 0/3 | upstream: reported on 2024/04/28 04:21 | |||
upstream | possible deadlock in seq_read_iter (2) overlayfs | C | done | done | 14 | 412d | 571d | 25/28 | fixed on 2024/02/02 10:05 |
upstream | possible deadlock in seq_read_iter fs | 2 | 1283d | 1289d | 0/28 | auto-closed as invalid on 2021/12/05 03:01 | |||
upstream | possible deadlock in seq_read_iter (3) overlayfs | 148 | 274d | 363d | 25/28 | fixed on 2024/05/23 00:16 |
====================================================== WARNING: possible circular locking dependency detected 6.13.0-syzkaller-01005-gb9d8a295ed6b #0 Not tainted ------------------------------------------------------ syz.9.10415/10238 is trying to acquire lock: ffff888031389c30 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 but task is already holding lock: ffff888047c97c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_lock fs/pipe.c:92 [inline] ffff888047c97c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_lock+0x64/0x80 fs/pipe.c:89 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&pipe->mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 pipe_lock fs/pipe.c:92 [inline] pipe_lock+0x64/0x80 fs/pipe.c:89 iter_file_splice_write+0x1eb/0x10b0 fs/splice.c:687 do_splice_from fs/splice.c:941 [inline] do_splice+0x145c/0x1f60 fs/splice.c:1354 __do_splice+0x327/0x360 fs/splice.c:1436 __do_sys_splice fs/splice.c:1639 [inline] __se_sys_splice fs/splice.c:1621 [inline] __x64_sys_splice+0x187/0x250 fs/splice.c:1621 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (sb_writers#6){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1739 [inline] sb_start_write include/linux/fs.h:1875 [inline] mnt_want_write+0x6f/0x450 fs/namespace.c:547 ovl_create_object+0x12e/0x300 fs/overlayfs/dir.c:656 lookup_open.isra.0+0x11c8/0x1580 fs/namei.c:3649 open_last_lookups fs/namei.c:3748 [inline] path_openat+0x904/0x2d70 fs/namei.c:3984 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1395 do_sys_open fs/open.c:1410 [inline] __do_sys_open fs/open.c:1418 [inline] __se_sys_open fs/open.c:1414 [inline] __x64_sys_open+0x154/0x1e0 fs/open.c:1414 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ovl_i_mutex_dir_key[depth]){++++}-{4:4}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 inode_lock_shared include/linux/fs.h:842 [inline] lookup_slow fs/namei.c:1807 [inline] walk_component+0x342/0x5b0 fs/namei.c:2112 lookup_last fs/namei.c:2610 [inline] path_lookupat+0x17f/0x770 fs/namei.c:2634 filename_lookup+0x221/0x5f0 fs/namei.c:2663 kern_path+0x35/0x50 fs/namei.c:2771 lookup_bdev+0xd9/0x280 block/bdev.c:1163 resume_store+0x1d8/0x460 kernel/power/hibernate.c:1242 kobj_attr_store+0x55/0x80 lib/kobject.c:840 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&of->mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 traverse.part.0.constprop.0+0xac/0x640 fs/seq_file.c:106 traverse fs/seq_file.c:98 [inline] seq_read_iter+0x934/0x12b0 fs/seq_file.c:195 kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279 copy_splice_read+0x620/0xb90 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] do_splice_read+0x282/0x370 fs/splice.c:959 splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x178/0x250 fs/splice.c:1233 vfs_copy_file_range+0x5d3/0x15b0 fs/read_write.c:1620 __do_sys_copy_file_range+0x1a2/0x450 fs/read_write.c:1670 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&p->lock){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279 copy_splice_read+0x620/0xb90 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] do_splice_read+0x282/0x370 fs/splice.c:959 splice_file_to_pipe+0x109/0x120 fs/splice.c:1295 do_splice+0x1174/0x1f60 fs/splice.c:1379 __do_splice+0x159/0x360 fs/splice.c:1436 __do_sys_splice fs/splice.c:1639 [inline] __se_sys_splice fs/splice.c:1621 [inline] __x64_sys_splice+0x187/0x250 fs/splice.c:1621 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &p->lock --> sb_writers#6 --> &pipe->mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->mutex); lock(sb_writers#6); lock(&pipe->mutex); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz.9.10415/10238: #0: ffff888047c97c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_lock fs/pipe.c:92 [inline] #0: ffff888047c97c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_lock+0x64/0x80 fs/pipe.c:89 stack backtrace: CPU: 0 UID: 0 PID: 10238 Comm: syz.9.10415 Not tainted 6.13.0-syzkaller-01005-gb9d8a295ed6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279 copy_splice_read+0x620/0xb90 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] do_splice_read+0x282/0x370 fs/splice.c:959 splice_file_to_pipe+0x109/0x120 fs/splice.c:1295 do_splice+0x1174/0x1f60 fs/splice.c:1379 __do_splice+0x159/0x360 fs/splice.c:1436 __do_sys_splice fs/splice.c:1639 [inline] __se_sys_splice fs/splice.c:1621 [inline] __x64_sys_splice+0x187/0x250 fs/splice.c:1621 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd647785d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd6455f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007fd647976080 RCX: 00007fd647785d29 RDX: 000000000000000d RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fd647801b08 R08: 0000000000000f3e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd647976080 R15: 00007fff2cd31458 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/01/22 13:20 | upstream | b9d8a295ed6b | da72ac06 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | possible deadlock in seq_read_iter | ||
2024/12/25 11:12 | upstream | 9b2ffa6148b1 | 444551c4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | possible deadlock in seq_read_iter | ||
2024/11/28 05:25 | upstream | aaf20f870da0 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in seq_read_iter | ||
2024/11/28 05:25 | upstream | aaf20f870da0 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in seq_read_iter | ||
2024/11/28 05:24 | upstream | aaf20f870da0 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in seq_read_iter | ||
2024/11/04 02:28 | upstream | b9021de3ec2f | f00eed24 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | possible deadlock in seq_read_iter | ||
2024/10/25 15:08 | upstream | ae90f6a6170d | c79b8ca5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | possible deadlock in seq_read_iter | ||
2024/10/02 15:58 | upstream | e32cde8d2bd7 | 02f9582a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/09/10 20:38 | upstream | 8d8d276ba2fb | 86aa7bd7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/08/17 02:02 | upstream | 85652baa895b | dbc93b08 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/21 17:23 | upstream | 50736169ecc8 | dac2aa43 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in seq_read_iter | ||
2024/06/17 15:55 | upstream | 2ccbdf43d5e7 | 1f11cfd7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/17 15:54 | upstream | 2ccbdf43d5e7 | 1f11cfd7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/09 01:23 | upstream | 061d1af7b030 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/09 00:02 | upstream | dc772f8237f9 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/05 17:12 | upstream | 71d7b52cc33b | 5aa1a7c9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/05 10:16 | upstream | 32f88d65f01b | e1e2c66e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/04 11:57 | upstream | 2ab795141095 | 11f2afa5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/04 01:06 | upstream | f06ce441457d | a1feae05 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/03 09:45 | upstream | c3f38fa61af7 | 0aba2352 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/03 04:19 | upstream | c3f38fa61af7 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/03 04:18 | upstream | c3f38fa61af7 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/02 15:05 | upstream | 83814698cf48 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/02 01:01 | upstream | 89be4025b0db | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/06/01 12:04 | upstream | cc8ed4d0a848 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 22:38 | upstream | d8ec19857b09 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 22:34 | upstream | d8ec19857b09 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 22:33 | upstream | d8ec19857b09 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:58 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:46 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:18 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:18 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:18 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/31 20:18 | upstream | d8ec19857b09 | 0c378259 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/28 19:44 | upstream | e0cce98fe279 | 34889ee3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/28 17:31 | upstream | 2bfcfd584ff5 | 34889ee3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/27 21:49 | upstream | 2bfcfd584ff5 | 761766e6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter | ||
2024/05/23 06:43 | upstream | b6394d6f7159 | 4d098039 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in seq_read_iter |