Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [fs?] possible deadlock in __configfs_open_file | 0 (1) | 2024/12/22 09:16 |
syzbot |
sign-in | mailing list | source | docs |
Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [fs?] possible deadlock in __configfs_open_file | 0 (1) | 2024/12/22 09:16 |
============================================ WARNING: possible recursive locking detected 6.13.0-rc5-syzkaller #0 Not tainted -------------------------------------------- syz-executor617/5827 is trying to acquire lock: ffff888026d5a678 (&p->frag_sem){.+.+}-{4:4}, at: __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304 but task is already holding lock: ffff888026d5a678 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline] ffff888026d5a678 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&p->frag_sem); lock(&p->frag_sem); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor617/5827: #0: ffff888144af4420 (sb_writers#9){.+.+}-{0:0}, at: ksys_pwrite64 fs/read_write.c:786 [inline] #0: ffff888144af4420 (sb_writers#9){.+.+}-{0:0}, at: __do_sys_pwrite64 fs/read_write.c:794 [inline] #0: ffff888144af4420 (sb_writers#9){.+.+}-{0:0}, at: __se_sys_pwrite64 fs/read_write.c:791 [inline] #0: ffff888144af4420 (sb_writers#9){.+.+}-{0:0}, at: __x64_sys_pwrite64+0x1f6/0x250 fs/read_write.c:791 #1: ffff8880249f1c88 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x75/0x4b0 fs/configfs/file.c:226 #2: ffff888026d5a678 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline] #2: ffff888026d5a678 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x216/0x4b0 fs/configfs/file.c:229 #3: ffffffff8ee08a88 (target_devices_lock){+.+.}-{4:4}, at: target_core_item_dbroot_store+0x23/0x2e0 drivers/target/target_core_configfs.c:114 stack backtrace: CPU: 0 UID: 0 PID: 5827 Comm: syz-executor617 Not tainted 6.13.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain kernel/locking/lockdep.c:3891 [inline] __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 __configfs_open_file+0xe8/0x9c0 fs/configfs/file.c:304 do_dentry_open+0xf59/0x1ea0 fs/open.c:945 vfs_open+0x82/0x3f0 fs/open.c:1075 do_open fs/namei.c:3828 [inline] path_openat+0x1e6a/0x2d60 fs/namei.c:3987 do_filp_open+0x20c/0x470 fs/namei.c:4014 file_open_name+0x2a4/0x450 fs/open.c:1347 filp_open+0x4b/0x80 fs/open.c:1367 target_core_item_dbroot_store+0x10d/0x2e0 drivers/target/target_core_configfs.c:134 flush_write_buffer fs/configfs/file.c:207 [inline] configfs_write_iter+0x2f6/0x4b0 fs/configfs/file.c:229 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_pwrite64 fs/read_write.c:786 [inline] __do_sys_pwrite64 fs/read_write.c:794 [inline] __se_sys_pwrite64 fs/read_write.c:791 [inline] __x64_sys_pwrite64+0x1f6/0x250 fs/read_write.c:791 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: 0033:0x7f67949c02e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe65528488 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007ffe65528658 RCX: 00007f67949c02e9 RDX: 0000000000000200 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007f6794a33610 R08: 0000000000000000 R09: 00007ffe65528658 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe65528648 R14: 0000000000000001 R15: 000000000
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/12/30 10:31 | upstream | fc033cf25e61 | d3ccff63 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | |
2024/12/24 22:13 | upstream | 9b2ffa6148b1 | 444551c4 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | |
2024/12/19 17:41 | upstream | eabcdba3ad40 | 1d58202c | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | |
2024/12/18 09:34 | upstream | aef25be35d23 | a0626d3a | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | |
2025/01/17 14:25 | upstream | 9bffa1ad25b8 | bb91bdd4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2025/01/17 14:25 | upstream | 9bffa1ad25b8 | bb91bdd4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2025/01/14 04:55 | upstream | c45323b7560e | b1f1cd88 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2024/12/30 06:49 | upstream | 4099a71718b0 | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2024/12/30 03:22 | upstream | 4099a71718b0 | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2024/12/19 12:36 | upstream | eabcdba3ad40 | 1d58202c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file | ||
2024/12/18 09:10 | upstream | aef25be35d23 | a0626d3a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in __configfs_open_file |