BUG: sleeping function called from invalid context at fs/inode.c:1928
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5341, name: syz.0.0
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
2 locks held by syz.0.0/5341:
 #0: ffff88801236e420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:508
 #1: ffff888000cba478 (&sb->s_type->i_lock_key#35){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #1: ffff888000cba478 (&sb->s_type->i_lock_key#35){+.+.}-{3:3}, at: f2fs_drop_inode+0x67e/0x950 fs/f2fs/super.c:1822
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 __might_resched+0x495/0x610 kernel/sched/core.c:8925
 iput+0x2b/0xc50 fs/inode.c:1928
 f2fs_drop_inode+0x686/0x950 fs/f2fs/super.c:1823
 iput_final fs/inode.c:1884 [inline]
 iput+0x6d9/0xc50 fs/inode.c:1966
 do_unlinkat+0x39f/0x560 fs/namei.c:4744
 coredump_file+0x1a5/0xaf0 fs/coredump.c:902
 vfs_coredump+0x1693/0x2a60 fs/coredump.c:1143
 get_signal+0x1108/0x1340 kernel/signal.c:3019
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x7e/0x110 kernel/entry/common.c:73
 exc_page_fault+0xab/0x100 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fa1cf44f987
Code: 88 15 72 5d ec 00 88 05 6f 5d ec 00 c3 50 48 8d 35 19 26 1c 00 48 8d 3d 1f 26 1c 00 31 c0 e8 20 f7 ff ff 53 89 fb 48 83 ec 10 <64> 8b 04 25 94 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007fa1d03dc1a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007fa1cf58eec9
RDX: 00007fa1d03dc1c0 RSI: 00007fa1d03dc2f0 RDI: 000000000000000b
RBP: 00007fa1cf611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fa1cf7e6038 R14: 00007fa1cf7e5fa0 R15: 00007ffc3dc34db8
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5341 at fs/inode.c:1933 iput+0x38c/0xc50 fs/inode.c:1933
Modules linked in:
CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:iput+0x38c/0xc50 fs/inode.c:1933
Code: 80 3d 13 10 49 0d 01 0f 85 b2 00 00 00 e8 0c 73 80 ff 4c 89 f7 be 10 00 00 00 e8 cf 85 06 00 e9 2c fd ff ff e8 f5 72 80 ff 90 <0f> 0b 90 e9 70 fd ff ff e8 e7 72 80 ff 90 0f 0b 90 e9 d7 fe ff ff
RSP: 0018:ffffc9000d577128 EFLAGS: 00010293
RAX: ffffffff823f30ab RBX: 0000000000000001 RCX: ffff88800084a480
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff888000cba4b0 R08: ffffffff92983047 R09: 1ffffffff2530608
R10: dffffc0000000000 R11: fffffbfff2530609 R12: ffff888000cba5e0
R13: dffffc0000000000 R14: ffff888000cba3e0 R15: 1ffffffff1f3cc52
FS:  0000000000000000(0000) GS:ffff88808d304000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1d03da990 CR3: 0000000000d36000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 f2fs_drop_inode+0x686/0x950 fs/f2fs/super.c:1823
 iput_final fs/inode.c:1884 [inline]
 iput+0x6d9/0xc50 fs/inode.c:1966
 do_unlinkat+0x39f/0x560 fs/namei.c:4744
 coredump_file+0x1a5/0xaf0 fs/coredump.c:902
 vfs_coredump+0x1693/0x2a60 fs/coredump.c:1143
 get_signal+0x1108/0x1340 kernel/signal.c:3019
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x7e/0x110 kernel/entry/common.c:73
 exc_page_fault+0xab/0x100 arch/x86/mm/fault.c:1535
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fa1cf44f987
Code: 88 15 72 5d ec 00 88 05 6f 5d ec 00 c3 50 48 8d 35 19 26 1c 00 48 8d 3d 1f 26 1c 00 31 c0 e8 20 f7 ff ff 53 89 fb 48 83 ec 10 <64> 8b 04 25 94 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007fa1d03dc1a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007fa1cf58eec9
RDX: 00007fa1d03dc1c0 RSI: 00007fa1d03dc2f0 RDI: 000000000000000b
RBP: 00007fa1cf611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fa1cf7e6038 R14: 00007fa1cf7e5fa0 R15: 00007ffc3dc34db8
 </TASK>