blkdev_bszset+0x19b/0x240 block/ioctl.c:553 blkdev_ioctl+0x44e/0x6d0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:867! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 10357 Comm: syz.4.1086 Not tainted 6.16.0-rc3-syzkaller-00233-g35e261cd95dd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__filemap_add_folio+0xf53/0x11d0 mm/filemap.c:867 Code: cf c7 ff 48 c7 c6 c0 1e b9 8b 4c 89 ef e8 65 13 11 00 90 0f 0b e8 8d cf c7 ff 48 c7 c6 20 1f b9 8b 4c 89 ef e8 4e 13 11 00 90 <0f> 0b e8 76 cf c7 ff 90 0f 0b 90 e9 f2 fb ff ff e8 68 cf c7 ff 48 RSP: 0018:ffffc900046cf358 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000000003 RCX: ffffc9000e458000 RDX: 0000000000080000 RSI: ffffffff81f450f2 RDI: ffff88807bd60444 RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90a81657 R11: 0000000000000000 R12: 0000000000000004 R13: ffffea0001625a00 R14: 0000000000020040 R15: 0000000000000003 FS: 00007f8a143fb6c0(0000) GS:ffff888124852000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8211abf1e9 CR3: 0000000079101000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: filemap_add_folio+0x10e/0x220 mm/filemap.c:969 ra_alloc_folio mm/readahead.c:448 [inline] page_cache_ra_order+0x586/0xd00 mm/readahead.c:509 page_cache_async_ra+0x5cb/0x8a0 mm/readahead.c:687 do_async_mmap_readahead mm/filemap.c:3299 [inline] filemap_fault+0xd3f/0x26c0 mm/filemap.c:3398 __do_fault+0x10d/0x490 mm/memory.c:5169 do_read_fault mm/memory.c:5590 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault+0x3c2a/0x5490 mm/memory.c:6212 handle_mm_fault+0x589/0xd10 mm/memory.c:6381 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 10 04 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 e9 8f 10 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc900046cfb20 EFLAGS: 00050206 RAX: 0000000000000001 RBX: 00002000001d0000 RCX: 0000000000001000 RDX: 0000000000000000 RSI: 00002000001d0000 RDI: ffff888035c82000 RBP: 0000000000001000 R08: 0000000000000001 R09: ffffed1006b905ff R10: ffff888035c82fff R11: 0000000000000000 R12: 0000000000000000 R13: ffff888035c82000 R14: dffffc0000000000 R15: 00002000001d0000 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:178 [inline] _copy_from_user+0x98/0xd0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] snd_rawmidi_kernel_write1+0x50a/0x8a0 sound/core/rawmidi.c:1560 snd_rawmidi_write+0x26e/0xc10 sound/core/rawmidi.c:1629 vfs_write+0x2a0/0x1150 fs/read_write.c:684 ksys_write+0x1f8/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8a1358e929 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:00007f8a143fb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f8a137b6080 RCX: 00007f8a1358e929 RDX: 00000000fffffd2c RSI: 0000200000000000 RDI: 000000000000000f RBP: 00007f8a13610b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8a137b6080 R15: 00007ffe54516a98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0xf53/0x11d0 mm/filemap.c:867 Code: cf c7 ff 48 c7 c6 c0 1e b9 8b 4c 89 ef e8 65 13 11 00 90 0f 0b e8 8d cf c7 ff 48 c7 c6 20 1f b9 8b 4c 89 ef e8 4e 13 11 00 90 <0f> 0b e8 76 cf c7 ff 90 0f 0b 90 e9 f2 fb ff ff e8 68 cf c7 ff 48 RSP: 0018:ffffc900046cf358 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000000003 RCX: ffffc9000e458000 RDX: 0000000000080000 RSI: ffffffff81f450f2 RDI: ffff88807bd60444 RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90a81657 R11: 0000000000000000 R12: 0000000000000004 R13: ffffea0001625a00 R14: 0000000000020040 R15: 0000000000000003 FS: 00007f8a143fb6c0(0000) GS:ffff888124852000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3e31da CR3: 0000000079101000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 10 04 00 adc %al,(%rax,%rax,1) 3: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 00 e: 66 90 xchg %ax,%ax 10: 48 8b 06 mov (%rsi),%rax 13: 48 89 07 mov %rax,(%rdi) 16: 48 83 c6 08 add $0x8,%rsi 1a: 48 83 c7 08 add $0x8,%rdi 1e: 83 e9 08 sub $0x8,%ecx 21: 74 db je 0xfffffffe 23: 83 f9 08 cmp $0x8,%ecx 26: 73 e8 jae 0x10 28: eb c5 jmp 0xffffffef * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: e9 8f 10 04 00 jmp 0x410c0 31: 48 8b 06 mov (%rsi),%rax 34: 48 89 07 mov %rax,(%rdi) 37: 48 8d 47 08 lea 0x8(%rdi),%rax 3b: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 3f: 48 rex.W