syzbot

 exit_mmap+0x3b3/0x980 mm/mmap.c:3250
 __mmput+0x115/0x3c0 kernel/fork.c:1200
 exit_mm+0x226/0x300 kernel/exit.c:565
 do_exit+0x9f6/0x26a0 kernel/exit.c:858
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
------------[ cut here ]------------
kernel BUG at mm/filemap.c:153!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4248 Comm: syz-executor373 Tainted: G        W          6.1.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:filemap_unaccount_folio+0x5c2/0xa60 mm/filemap.c:153
Code: 07 38 c1 0f 8c 21 fe ff ff 48 89 ef e8 e7 21 2b 00 e9 14 fe ff ff e8 6d 97 d3 ff 4c 89 ef 48 c7 c6 e0 ff 14 8b e8 7e 50 13 00 <0f> 0b e8 57 97 d3 ff 4c 89 ef 48 c7 c6 60 05 15 8b e8 68 50 13 00
RSP: 0018:ffffc90003b67578 EFLAGS: 00010046
RAX: d8398c7165fba200 RBX: ffff888077258368 RCX: ffffc90003b67303
RDX: 0000000000000002 RSI: ffffffff8b0c14c0 RDI: ffffffff8b5e6400
RBP: ffffc90003b67718 R08: dffffc0000000000 R09: fffffbfff1d3608e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888077258368
R13: ffffea0001c71440 R14: ffffea0001c71440 R15: ffffea0001c71440
FS:  0000555568ec3380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f564526c0d0 CR3: 0000000079347000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc7/0xaa0 mm/filemap.c:222
 filemap_remove_folio+0x105/0x2e0 mm/filemap.c:255
 truncate_inode_folio+0x59/0x70 mm/truncate.c:195
 shmem_undo_range+0x570/0x2390 mm/shmem.c:942
 shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x265/0xa60 mm/shmem.c:1171
 evict+0x529/0x930 fs/inode.c:705
 __dentry_kill+0x436/0x650 fs/dcache.c:611
 dentry_kill+0xbb/0x290
 dput+0xfb/0x1d0 fs/dcache.c:918
 __fput+0x62e/0x8d0 fs/file_table.c:328
 task_work_run+0x246/0x300 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f56451f3d70
Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d 11 93 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
RSP: 002b:00007ffc1acc4da8 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f56451f3d70
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000000000003
RBP: 00007f564523e0fd R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000202 R12: 00007f564524327c
R13: 00007f564523e082 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x5c2/0xa60 mm/filemap.c:153
Code: 07 38 c1 0f 8c 21 fe ff ff 48 89 ef e8 e7 21 2b 00 e9 14 fe ff ff e8 6d 97 d3 ff 4c 89 ef 48 c7 c6 e0 ff 14 8b e8 7e 50 13 00 <0f> 0b e8 57 97 d3 ff 4c 89 ef 48 c7 c6 60 05 15 8b e8 68 50 13 00
RSP: 0018:ffffc90003b67578 EFLAGS: 00010046
RAX: d8398c7165fba200 RBX: ffff888077258368 RCX: ffffc90003b67303
RDX: 0000000000000002 RSI: ffffffff8b0c14c0 RDI: ffffffff8b5e6400
RBP: ffffc90003b67718 R08: dffffc0000000000 R09: fffffbfff1d3608e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888077258368
R13: ffffea0001c71440 R14: ffffea0001c71440 R15: ffffea0001c71440
FS:  0000555568ec3380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f564526c0d0 CR3: 0000000079347000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400