F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop2): Mounted with checkpoint version = 753bd00b F2FS-fs (loop3): Mounted with checkpoint version = 753bd00b audit: type=1804 audit(1676880519.922:14): pid=10115 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir2302608080/syzkaller.0OE7aA/31/bus/bus" dev="loop3" ino=4 res=1 ================================================ WARNING: lock held when returning to user space! 4.14.305-syzkaller #0 Not tainted ------------------------------------------------ syz-executor.3/10115 is leaving the kernel with locks still held! 1 lock held by syz-executor.3/10115: #0: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#13){.+.+}, at: [] mnt_want_write_file+0xfd/0x3b0 fs/namespace.c:497 audit: type=1804 audit(1676880519.952:15): pid=10114 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir622052674/syzkaller.3c25no/40/bus/bus" dev="loop2" ino=4 res=1 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8023 at fs/namespace.c:1178 cleanup_mnt+0x222/0x2c0 fs/namespace.c:1178 Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 1 PID: 8023 Comm: syz-executor.3 Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x21d/0x451 kernel/panic.c:247 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171 __warn+0xdf/0x1e0 kernel/panic.c:603 report_bug+0x208/0x250 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 RIP: 0010:cleanup_mnt+0x222/0x2c0 fs/namespace.c:1178 RSP: 0018:ffff8880b2fbfe18 EFLAGS: 00010297 RAX: ffff8880a969c540 RBX: dffffc0000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a094728 RBP: 0000000000000008 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a969c540 R12: ffff8880af32f400 R13: 0000000000000001 R14: 0000000000000007 R15: fffffbfff141291e task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f03985bb567 RSP: 002b:00007ffc56906708 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f03985bb567 RDX: 00007ffc569067d8 RSI: 000000000000000a RDI: 00007ffc569067d0 RBP: 00007ffc569067d0 R08: 00000000ffffffff R09: 00007ffc569065a0 R10: 00005555568458e3 R11: 0000000000000246 R12: 00007f0398614b24 R13: 00007ffc56907890 R14: 0000555556845810 R15: 00007ffc569078d0 Kernel Offset: disabled Rebooting in 86400 seconds..