Title | Replies (including bot) | Last reply |
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[syzbot] Monthly overlayfs report (Jun 2024) | 0 (1) | 2024/06/15 17:49 |
[syzbot] [overlayfs?] possible deadlock in ovl_copy_up_start (4) | 0 (1) | 2024/06/12 03:58 |
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Title | Replies (including bot) | Last reply |
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[syzbot] Monthly overlayfs report (Jun 2024) | 0 (1) | 2024/06/15 17:49 |
[syzbot] [overlayfs?] possible deadlock in ovl_copy_up_start (4) | 0 (1) | 2024/06/12 03:58 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in ovl_copy_up_start (3) overlayfs | 1 | 195d | 191d | 0/28 | closed as dup on 2024/04/08 10:02 | |||
linux-4.14 | possible deadlock in ovl_copy_up_start (2) | 6 | 1002d | 1052d | 0/1 | auto-closed as invalid on 2022/05/17 06:42 | |||
upstream | possible deadlock in ovl_copy_up_start (2) overlayfs | 1 | 387d | 383d | 0/28 | closed as dup on 2023/10/04 08:46 | |||
linux-4.14 | possible deadlock in ovl_copy_up_start (4) | 1 | 620d | 620d | 0/1 | upstream: reported on 2023/02/03 17:59 | |||
linux-4.14 | possible deadlock in ovl_copy_up_start (3) | 2 | 791d | 817d | 0/1 | auto-obsoleted due to no activity on 2022/12/14 20:28 | |||
linux-4.14 | possible deadlock in ovl_copy_up_start | 9 | 1263d | 1471d | 0/1 | auto-closed as invalid on 2021/08/29 09:58 | |||
upstream | possible deadlock in ovl_copy_up_start overlayfs | 2 | 2182d | 2190d | 11/28 | fixed on 2018/11/12 21:25 |
====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc2-syzkaller-00366-g771ed66105de #0 Not tainted ------------------------------------------------------ syz-executor.2/5264 is trying to acquire lock: ffff888055db1698 (&ovl_i_lock_key[depth]){+.+.}-{3:3}, at: ovl_inode_lock_interruptible fs/overlayfs/overlayfs.h:657 [inline] ffff888055db1698 (&ovl_i_lock_key[depth]){+.+.}-{3:3}, at: ovl_copy_up_start+0x53/0x310 fs/overlayfs/util.c:719 but task is already holding lock: ffff88802fbb6420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sb_writers#4){.+.+}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1655 [inline] sb_start_write include/linux/fs.h:1791 [inline] ovl_start_write+0x11d/0x290 fs/overlayfs/util.c:31 ovl_do_copy_up fs/overlayfs/copy_up.c:967 [inline] ovl_copy_up_one fs/overlayfs/copy_up.c:1168 [inline] ovl_copy_up_flags+0x1110/0x4470 fs/overlayfs/copy_up.c:1223 ovl_create_object+0x113/0x370 fs/overlayfs/dir.c:638 lookup_open fs/namei.c:3505 [inline] open_last_lookups fs/namei.c:3574 [inline] path_openat+0x1425/0x3280 fs/namei.c:3804 do_filp_open+0x235/0x490 fs/namei.c:3834 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1431 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ovl_i_lock_key[depth]){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ovl_inode_lock_interruptible fs/overlayfs/overlayfs.h:657 [inline] ovl_copy_up_start+0x53/0x310 fs/overlayfs/util.c:719 ovl_copy_up_one fs/overlayfs/copy_up.c:1161 [inline] ovl_copy_up_flags+0xbc1/0x4470 fs/overlayfs/copy_up.c:1223 ovl_create_tmpfile fs/overlayfs/dir.c:1317 [inline] ovl_tmpfile+0x262/0x6d0 fs/overlayfs/dir.c:1373 vfs_tmpfile+0x396/0x510 fs/namei.c:3701 do_tmpfile+0x156/0x340 fs/namei.c:3764 path_openat+0x2ab8/0x3280 fs/namei.c:3798 do_filp_open+0x235/0x490 fs/namei.c:3834 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_open fs/open.c:1428 [inline] __se_sys_open fs/open.c:1424 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1424 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_writers#4); lock(&ovl_i_lock_key[depth]); lock(sb_writers#4); lock(&ovl_i_lock_key[depth]); *** DEADLOCK *** 2 locks held by syz-executor.2/5264: #0: ffff888060236420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409 #1: ffff88802fbb6420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409 stack backtrace: CPU: 0 PID: 5264 Comm: syz-executor.2 Not tainted 6.10.0-rc2-syzkaller-00366-g771ed66105de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 ovl_inode_lock_interruptible fs/overlayfs/overlayfs.h:657 [inline] ovl_copy_up_start+0x53/0x310 fs/overlayfs/util.c:719 ovl_copy_up_one fs/overlayfs/copy_up.c:1161 [inline] ovl_copy_up_flags+0xbc1/0x4470 fs/overlayfs/copy_up.c:1223 ovl_create_tmpfile fs/overlayfs/dir.c:1317 [inline] ovl_tmpfile+0x262/0x6d0 fs/overlayfs/dir.c:1373 vfs_tmpfile+0x396/0x510 fs/namei.c:3701 do_tmpfile+0x156/0x340 fs/namei.c:3764 path_openat+0x2ab8/0x3280 fs/namei.c:3798 do_filp_open+0x235/0x490 fs/namei.c:3834 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_open fs/open.c:1428 [inline] __se_sys_open fs/open.c:1424 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1424 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff91547cf69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff91627e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ff9155b3f80 RCX: 00007ff91547cf69 RDX: 0000000000000000 RSI: 0000000000591002 RDI: 0000000020000100 RBP: 00007ff9154da6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff9155b3f80 R15: 00007ffe78e13ca8 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/06/09 23:04 | upstream | 771ed66105de | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in ovl_copy_up_start | ||
2024/06/09 23:01 | upstream | 771ed66105de | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | possible deadlock in ovl_copy_up_start | ||
2024/06/09 23:01 | upstream | 771ed66105de | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | possible deadlock in ovl_copy_up_start | ||
2024/06/09 22:56 | upstream | b8481381d4e2 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | possible deadlock in ovl_copy_up_start | ||
2024/06/09 22:56 | upstream | b8481381d4e2 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | possible deadlock in ovl_copy_up_start | ||
2024/06/08 03:56 | upstream | 96e09b8f8166 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | possible deadlock in ovl_copy_up_start | ||
2024/06/09 23:01 | upstream | 771ed66105de | c2e07261 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | possible deadlock in ovl_copy_up_start |