================================ WARNING: inconsistent lock state 4.19.211-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.5/22019 [HC0[0]:SC0[0]:HE1:SE1] takes: 0000000048b63cdc (sync_timeline_list_lock){?...}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] 0000000048b63cdc (sync_timeline_list_lock){?...}, at: sync_debugfs_show+0x2d/0x200 drivers/dma-buf/sync_debug.c:156 {IN-HARDIRQ-W} state was registered at: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 sync_timeline_debug_remove+0x25/0x190 drivers/dma-buf/sync_debug.c:40 sync_timeline_free drivers/dma-buf/sw_sync.c:113 [inline] kref_put include/linux/kref.h:70 [inline] sync_timeline_put+0x31/0x40 drivers/dma-buf/sw_sync.c:125 timeline_fence_release+0x1fe/0x2f0 drivers/dma-buf/sw_sync.c:153 dma_fence_release+0xeb/0x330 drivers/dma-buf/dma-fence.c:228 kref_put include/linux/kref.h:70 [inline] dma_fence_put include/linux/dma-fence.h:259 [inline] dma_fence_array_release+0x192/0x230 drivers/dma-buf/dma-fence-array.c:96 dma_fence_release+0xeb/0x330 drivers/dma-buf/dma-fence.c:228 kref_put include/linux/kref.h:70 [inline] dma_fence_put include/linux/dma-fence.h:259 [inline] irq_dma_fence_array_work+0x54/0x60 drivers/dma-buf/dma-fence-array.c:39 irq_work_run_list+0x140/0x1c0 kernel/irq_work.c:164 irq_work_run+0x4e/0xb0 kernel/irq_work.c:179 smp_irq_work_interrupt+0x98/0x440 arch/x86/kernel/irq_work.c:21 irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:925 arch_local_irq_enable arch/x86/include/asm/paravirt.h:799 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 spin_unlock_irq include/linux/spinlock.h:379 [inline] sw_sync_debugfs_release+0x14a/0x1b0 drivers/dma-buf/sw_sync.c:330 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 74 hardirqs last enabled at (73): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (73): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (74): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (74): [] _raw_spin_lock_irq+0x35/0x80 kernel/locking/spinlock.c:160 softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (0): [<0000000000000000>] (null) other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sync_timeline_list_lock); lock(sync_timeline_list_lock); *** DEADLOCK *** 2 locks held by syz-executor.5/22019: #0: 00000000c02acd05 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 #1: 0000000048b63cdc (sync_timeline_list_lock){?...}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] #1: 0000000048b63cdc (sync_timeline_list_lock){?...}, at: sync_debugfs_show+0x2d/0x200 drivers/dma-buf/sync_debug.c:156 stack backtrace: CPU: 0 PID: 22019 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_usage_bug.cold+0x42e/0x570 kernel/locking/lockdep.c:2545 valid_state kernel/locking/lockdep.c:2558 [inline] mark_lock_irq kernel/locking/lockdep.c:2752 [inline] mark_lock+0xc70/0x1160 kernel/locking/lockdep.c:3132 mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2810 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2831 [inline] lockdep_hardirqs_on+0x288/0x5c0 kernel/locking/lockdep.c:2884 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 spin_unlock_irq include/linux/spinlock.h:379 [inline] sync_print_obj drivers/dma-buf/sync_debug.c:127 [inline] sync_debugfs_show+0xeb/0x200 drivers/dma-buf/sync_debug.c:162 traverse.part.0+0xcf/0x5f0 fs/seq_file.c:116 traverse fs/seq_file.c:106 [inline] seq_read+0x99d/0x11c0 fs/seq_file.c:191 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 do_preadv fs/read_write.c:1071 [inline] __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x22b/0x310 fs/read_write.c:1116 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fbe42f02639 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe41475168 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007fbe43022f80 RCX: 00007fbe42f02639 RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00007fbe42f5d7e1 R08: 0000000000000101 R09: 0000000000000000 R10: 0000000000000101 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffef96db0f R14: 00007fbe41475300 R15: 0000000000022000 print_req_error: 986 callbacks suppressed print_req_error: I/O error, dev nbd5, sector 0 block nbd4: Device being setup by another task buffer_io_error: 986 callbacks suppressed Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read print_req_error: I/O error, dev nbd5, sector 4 Buffer I/O error on dev nbd5, logical block 2, async page read print_req_error: I/O error, dev nbd5, sector 6 Buffer I/O error on dev nbd5, logical block 3, async page read print_req_error: I/O error, dev nbd5, sector 0 Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read print_req_error: I/O error, dev nbd5, sector 4 audit: type=1804 audit(1667937790.188:78): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 Buffer I/O error on dev nbd5, logical block 2, async page read print_req_error: I/O error, dev nbd5, sector 6 Buffer I/O error on dev nbd5, logical block 3, async page read print_req_error: I/O error, dev nbd5, sector 0 Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated block nbd4: Device being setup by another task audit: type=1804 audit(1667937790.218:79): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 block nbd1: Device being setup by another task audit: type=1804 audit(1667937790.218:80): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 block nbd1: Device being setup by another task ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table audit: type=1804 audit(1667937790.218:81): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 nbd5: partition table beyond EOD, truncated block nbd1: Device being setup by another task audit: type=1804 audit(1667937790.218:82): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 block nbd1: Device being setup by another task audit: type=1804 audit(1667937790.218:83): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 ldm_validate_partition_table(): Disk read failed. audit: type=1804 audit(1667937790.218:84): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table audit: type=1804 audit(1667937790.218:85): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 nbd5: partition table beyond EOD, truncated audit: type=1804 audit(1667937790.218:86): pid=22043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1875502379/syzkaller.kDwUrd/3567/bus" dev="sda1" ino=16296 res=1 block nbd1: Device being setup by another task caif:caif_disconnect_client(): nothing to disconnect caif:caif_disconnect_client(): nothing to disconnect caif:caif_disconnect_client(): nothing to disconnect block nbd3: Device being setup by another task ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. block nbd4: Device being setup by another task Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated block nbd4: Device being setup by another task ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated block nbd1: server does not support multiple connections per device. block nbd4: Device being setup by another task Unknown ioctl -1068991484 block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. Unknown ioctl -1068991484 block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. block nbd1: server does not support multiple connections per device. Unknown ioctl -1068991484 block nbd1: server does not support multiple connections per device. Unknown ioctl -1068991484 print_req_error: 350 callbacks suppressed print_req_error: I/O error, dev nbd5, sector 0 buffer_io_error: 350 callbacks suppressed Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read print_req_error: I/O error, dev nbd5, sector 4 Buffer I/O error on dev nbd5, logical block 2, async page read print_req_error: I/O error, dev nbd5, sector 6 Buffer I/O error on dev nbd5, logical block 3, async page read print_req_error: I/O error, dev nbd5, sector 0 Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read print_req_error: I/O error, dev nbd5, sector 4 Buffer I/O error on dev nbd5, logical block 2, async page read print_req_error: I/O error, dev nbd5, sector 6 Buffer I/O error on dev nbd5, logical block 3, async page read print_req_error: I/O error, dev nbd5, sector 0 Buffer I/O error on dev nbd5, logical block 0, async page read print_req_error: I/O error, dev nbd5, sector 2 Buffer I/O error on dev nbd5, logical block 1, async page read ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated block nbd4: Device being setup by another task block nbd4: Device being setup by another task block nbd4: Device being setup by another task block nbd4: Device being setup by another task ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated ldm_validate_partition_table(): Disk read failed. Dev nbd5: unable to read RDB block 0 nbd5: unable to read partition table nbd5: partition table beyond EOD, truncated block nbd4: Device being setup by another task block nbd4: Device being setup by another task