blkdev_ioctl+0x513/0x6f0 block/ioctl.c:779
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:858!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 28403 Comm: syz.1.8044 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__filemap_add_folio+0xf81/0x1350 mm/filemap.c:858
Code: 55 b4 c4 ff 48 8d 3d de 22 9c 0e 67 48 0f b9 3a e9 07 fd ff ff e8 3f b4 c4 ff 48 c7 c6 a0 37 bd 8b 4c 89 ef e8 00 2e 12 00 90 <0f> 0b 4c 8b 6c 24 60 e8 23 b4 c4 ff 48 c7 84 24 a0 00 00 00 03 00
RSP: 0018:ffffc900033c73f8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000f9f2000
RDX: 0000000000080000 RSI: ffffffff82562bd8 RDI: ffff888038512384
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000004
R13: ffffea00018800c0 R14: 0000000000000000 R15: 1ffff92000678eaa
FS:  00007f811a1f66c0(0000) GS:ffff8881242f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31303ff8 CR3: 000000004a207000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 filemap_add_folio+0x1d8/0x690 mm/filemap.c:966
 ra_alloc_folio mm/readahead.c:456 [inline]
 page_cache_ra_order+0x614/0xf10 mm/readahead.c:515
 do_sync_mmap_readahead mm/filemap.c:3405 [inline]
 filemap_fault+0x1900/0x2e90 mm/filemap.c:3554
 __do_fault+0x10b/0x440 mm/memory.c:5458
 do_read_fault mm/memory.c:5893 [inline]
 do_fault+0xa99/0x1750 mm/memory.c:6027
 do_pte_missing mm/memory.c:4550 [inline]
 handle_pte_fault mm/memory.c:6411 [inline]
 __handle_mm_fault+0x187d/0x2a00 mm/memory.c:6549
 handle_mm_fault+0x36d/0xa20 mm/memory.c:6718
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1178/0x32a0 mm/gup.c:1428
 populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860
 __mm_populate+0x107/0x3a0 mm/gup.c:1963
 mm_populate include/linux/mm.h:4135 [inline]
 vm_mmap_pgoff+0x37f/0x470 mm/util.c:586
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f811bf9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f811a1f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f811c216090 RCX: 00007f811bf9c819
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f811c032c91 R08: 0000000000000004 R09: 000000002c93a000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f811c216128 R14: 00007f811c216090 R15: 00007ffdce131118
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xf81/0x1350 mm/filemap.c:858
Code: 55 b4 c4 ff 48 8d 3d de 22 9c 0e 67 48 0f b9 3a e9 07 fd ff ff e8 3f b4 c4 ff 48 c7 c6 a0 37 bd 8b 4c 89 ef e8 00 2e 12 00 90 <0f> 0b 4c 8b 6c 24 60 e8 23 b4 c4 ff 48 c7 84 24 a0 00 00 00 03 00
RSP: 0018:ffffc900033c73f8 EFLAGS: 00010246
RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000f9f2000
RDX: 0000000000080000 RSI: ffffffff82562bd8 RDI: ffff888038512384
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000004
R13: ffffea00018800c0 R14: 0000000000000000 R15: 1ffff92000678eaa
FS:  00007f811a1f66c0(0000) GS:ffff8881242f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c5810770d8 CR3: 000000004a207000 CR4: 0000000000350ef0