blkdev_bszset+0x196/0x220 block/ioctl.c:549 blkdev_ioctl+0x430/0x6d0 block/ioctl.c:688 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:868! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5150 Comm: syz.7.11234 Not tainted 6.16.0-next-20250807-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__filemap_add_folio+0x11ad/0x12f0 mm/filemap.c:867 Code: 50 c9 ff 4c 89 e7 48 c7 c6 a0 3d b4 8b e8 bb 4a 31 ff 90 0f 0b e8 13 50 c9 ff 4c 89 e7 48 c7 c6 80 34 b4 8b e8 a4 4a 31 ff 90 <0f> 0b e8 fc 4f c9 ff 4c 89 e7 48 c7 c6 a0 3d b4 8b e8 8d 4a 31 ff RSP: 0018:ffffc900043bf480 EFLAGS: 00010246 RAX: 11d9d10a684eb700 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8dc91e3a RDI: 00000000ffffffff RBP: ffffc900043bf5f0 R08: ffffffff8fe4be37 R09: 1ffffffff1fc97c6 R10: dffffc0000000000 R11: fffffbfff1fc97c7 R12: ffffea0000e53800 R13: dffffc0000000000 R14: ffffea0000e53808 R15: 0000000000000003 FS: 00007f94aad5b6c0(0000) GS:ffff8881257dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c459f1c CR3: 000000006676a000 CR4: 00000000003526f0 DR0: fffffffffffffff8 DR1: 0000000000000006 DR2: 0200000000000000 DR3: 0000000000000005 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: filemap_add_folio+0xd5/0x270 mm/filemap.c:969 ra_alloc_folio mm/readahead.c:448 [inline] page_cache_ra_order+0x643/0xd40 mm/readahead.c:506 do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1 filemap_fault+0x62c/0x1200 mm/filemap.c:3446 __do_fault+0x138/0x390 mm/memory.c:5152 do_cow_fault mm/memory.c:5603 [inline] do_fault mm/memory.c:5709 [inline] do_pte_missing mm/memory.c:4234 [inline] handle_pte_fault mm/memory.c:6052 [inline] __handle_mm_fault+0x1719/0x5440 mm/memory.c:6195 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_8+0xd/0x20 arch/x86/lib/putuser.S:115 Code: 89 01 31 c9 0f 01 ca e9 01 45 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <48> 89 01 31 c9 0f 01 ca e9 d6 44 03 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900043bfdf8 EFLAGS: 00050202 RAX: 0000200000000080 RBX: 0000000000000000 RCX: 0000200000000180 RDX: 0000000000000000 RSI: ffffffff8de84af2 RDI: ffffffff8c04d300 RBP: ffffc900043bfea8 R08: 0000000000000000 R09: ffffffff820bd1c0 R10: 00000000c0481273 R11: 0000000000000002 R12: dffffc0000000000 R13: 0000200000000180 R14: ffff888142b96030 R15: ffff888024e4e388 put_long block/ioctl.c:276 [inline] blkdev_ioctl+0x3c7/0x6d0 block/ioctl.c:677 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94a9f8ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f94aad5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f94aa1b6180 RCX: 00007f94a9f8ebe9 RDX: 0000200000000180 RSI: 0000000000001265 RDI: 0000000000000007 RBP: 00007f94aa011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f94aa1b6218 R14: 00007f94aa1b6180 R15: 00007ffc488d6bb8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0x11ad/0x12f0 mm/filemap.c:867 Code: 50 c9 ff 4c 89 e7 48 c7 c6 a0 3d b4 8b e8 bb 4a 31 ff 90 0f 0b e8 13 50 c9 ff 4c 89 e7 48 c7 c6 80 34 b4 8b e8 a4 4a 31 ff 90 <0f> 0b e8 fc 4f c9 ff 4c 89 e7 48 c7 c6 a0 3d b4 8b e8 8d 4a 31 ff RSP: 0018:ffffc900043bf480 EFLAGS: 00010246 RAX: 11d9d10a684eb700 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8dc91e3a RDI: 00000000ffffffff RBP: ffffc900043bf5f0 R08: ffffffff8fe4be37 R09: 1ffffffff1fc97c6 R10: dffffc0000000000 R11: fffffbfff1fc97c7 R12: ffffea0000e53800 R13: dffffc0000000000 R14: ffffea0000e53808 R15: 0000000000000003 FS: 00007f94aad5b6c0(0000) GS:ffff8881257dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2f8487 CR3: 000000006676a000 CR4: 00000000003526f0 DR0: fffffffffffffff8 DR1: 0000000000000006 DR2: 0200000000000000 DR3: 0000000000000005 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 01 mov %eax,(%rcx) 2: 31 c9 xor %ecx,%ecx 4: 0f 01 ca clac 7: e9 01 45 03 00 jmp 0x3450d c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 48 89 cb mov %rcx,%rbx 20: 48 c1 fb 3f sar $0x3f,%rbx 24: 48 09 d9 or %rbx,%rcx 27: 0f 01 cb stac * 2a: 48 89 01 mov %rax,(%rcx) <-- trapping instruction 2d: 31 c9 xor %ecx,%ecx 2f: 0f 01 ca clac 32: e9 d6 44 03 00 jmp 0x3450d 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop