ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:607
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 12376 Comm: syz.3.1631 Not tainted 6.14.0-rc2-syzkaller-00041-g4dc1d1bec898 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:filemap_unaccount_folio+0xef/0x860 mm/filemap.c:154
Code: b7 2b ca ff 4c 8d 6b 30 31 ff 89 ee e8 aa 26 ca ff 85 ed 7e 17 e8 a1 2b ca ff 48 c7 c6 a0 79 78 8b 48 89 df e8 d2 71 11 00 90 <0f> 0b e8 8a 2b ca ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc90002faf3a0 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffea0001589e40 RCX: ffffc90002faf248
RDX: ffff8880258ac880 RSI: ffffffff81eec2fe RDI: ffff8880258accc4
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20bfd42
R10: ffffffff905fea17 R11: 0000000000000003 R12: ffff88806e2dc4f0
R13: ffffea0001589e70 R14: 0000000000000000 R15: ffffc90002faf608
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c2a04cb CR3: 000000004f792000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000fee0000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio mm/filemap.c:223 [inline]
 filemap_remove_folio+0xf1/0x250 mm/filemap.c:256
 truncate_inode_folio+0x49/0x70 mm/truncate.c:162
 shmem_undo_range+0x36e/0x1170 mm/shmem.c:1108
 shmem_truncate_range mm/shmem.c:1224 [inline]
 shmem_evict_inode+0x3a3/0xba0 mm/shmem.c:1352
 evict+0x409/0x960 fs/inode.c:796
 iput_final fs/inode.c:1946 [inline]
 iput fs/inode.c:1972 [inline]
 iput+0x52a/0x890 fs/inode.c:1958
 dentry_unlink_inode+0x29c/0x480 fs/dcache.c:440
 __dentry_kill+0x1d0/0x600 fs/dcache.c:643
 dput.part.0+0x4b1/0x9b0 fs/dcache.c:885
 dput+0x1f/0x30 fs/dcache.c:875
 __fput+0x51c/0xb70 fs/file_table.c:472
 task_work_run+0x14e/0x250 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xad8/0x2d70 kernel/exit.c:938
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
 get_signal+0x2576/0x2610 kernel/signal.c:3036
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf73ee579
Code: Unable to access opcode bytes at 0xf73ee54f.
RSP: 002b:00000000f500160c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 00000000f74150a8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f74150ac
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0xef/0x860 mm/filemap.c:154
Code: b7 2b ca ff 4c 8d 6b 30 31 ff 89 ee e8 aa 26 ca ff 85 ed 7e 17 e8 a1 2b ca ff 48 c7 c6 a0 79 78 8b 48 89 df e8 d2 71 11 00 90 <0f> 0b e8 8a 2b ca ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc90002faf3a0 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffea0001589e40 RCX: ffffc90002faf248
RDX: ffff8880258ac880 RSI: ffffffff81eec2fe RDI: ffff8880258accc4
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20bfd42
R10: ffffffff905fea17 R11: 0000000000000003 R12: ffff88806e2dc4f0
R13: ffffea0001589e70 R14: 0000000000000000 R15: ffffc90002faf608
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c2a04cb CR3: 000000004f792000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000fee0000e DR6: 00000000ffff0ff0 DR7: 0000000000000400