------------[ cut here ]------------ kernel BUG at fs/buffer.c:2791! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 3 PID: 7849 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:submit_bh_wbc+0x5da/0x730 fs/buffer.c:2791 Code: e8 eb 22 81 ff be 08 00 00 00 48 89 df e8 7e 5d de ff f0 80 63 01 fb e9 d1 fb ff ff e8 cf 22 81 ff 90 0f 0b e8 c7 22 81 ff 90 <0f> 0b e8 bf 22 81 ff 90 0f 0b e8 b7 22 81 ff 90 0f 0b e8 af 22 81 RSP: 0018:ffffc90023d27770 EFLAGS: 00010283 RAX: 0000000000008a23 RBX: ffff8880121bed98 RCX: ffffc9000c634000 RDX: 0000000000040000 RSI: ffffffff820d6d09 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5e8fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031c41000 CR3: 0000000000982000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: submit_bh fs/buffer.c:2832 [inline] __bh_read+0xae/0x1f0 fs/buffer.c:3101 bh_read_nowait include/linux/buffer_head.h:443 [inline] __block_write_begin_int+0x138e/0x16e0 fs/buffer.c:2157 __block_write_begin fs/buffer.c:2177 [inline] block_write_begin+0xb1/0x4a0 fs/buffer.c:2236 udf_write_begin+0x1cd/0x270 fs/udf/inode.c:256 generic_perform_write+0x272/0x620 mm/filemap.c:4015 __generic_file_write_iter+0x1fd/0x240 mm/filemap.c:4110 udf_file_write_iter+0x239/0x740 fs/udf/file.c:111 do_iter_readv_writev+0x504/0x780 fs/read_write.c:741 vfs_writev+0x36f/0xde0 fs/read_write.c:971 do_pwritev+0x1b2/0x260 fs/read_write.c:1072 __do_compat_sys_pwritev2 fs/read_write.c:1218 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1210 [inline] __ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1210 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 RIP: 0023:0xf729d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e8f5ac EFLAGS: 00000292 ORIG_RAX: 000000000000017b RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000020000140 RDX: 0000000000000001 RSI: 0000000000005405 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:submit_bh_wbc+0x5da/0x730 fs/buffer.c:2791 Code: e8 eb 22 81 ff be 08 00 00 00 48 89 df e8 7e 5d de ff f0 80 63 01 fb e9 d1 fb ff ff e8 cf 22 81 ff 90 0f 0b e8 c7 22 81 ff 90 <0f> 0b e8 bf 22 81 ff 90 0f 0b e8 b7 22 81 ff 90 0f 0b e8 af 22 81 RSP: 0018:ffffc90023d27770 EFLAGS: 00010283 RAX: 0000000000008a23 RBX: ffff8880121bed98 RCX: ffffc9000c634000 RDX: 0000000000040000 RSI: ffffffff820d6d09 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5e8fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031c47000 CR3: 0000000000982000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi