R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kernel BUG at lib/iov_iter.c:626! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 2 UID: 0 PID: 8044 Comm: syz.0.513 Not tainted 6.12.0-syzkaller-10553-gb86545e02e8c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:iov_iter_revert lib/iov_iter.c:626 [inline] RIP: 0010:iov_iter_revert+0x533/0x5a0 lib/iov_iter.c:611 Code: 89 e6 48 c7 c7 a0 46 b0 8e e8 89 da 31 00 e9 b1 fd ff ff e8 af 74 64 fd eb 95 e8 d8 74 64 fd e9 46 fb ff ff e8 5e c0 01 fd 90 <0f> 0b 48 8b 3c 24 e8 c2 74 64 fd e9 97 fb ff ff 48 8b 7c 24 08 e8 RSP: 0018:ffffc9000e5ef638 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff848c3ca0 RDX: ffff888024c88000 RSI: ffffffff848c40b2 RDI: 0000000000000001 RBP: ffffc9000e5efb10 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88806a7b6600 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f50f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f50ac000 CR3: 0000000068a7a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_direct_io+0xf0e/0x2580 fs/fuse/file.c:1667 fuse_direct_IO+0x620/0xf20 fs/fuse/file.c:3121 generic_file_direct_write+0x197/0x410 mm/filemap.c:3978 fuse_cache_write_iter fs/fuse/file.c:1474 [inline] fuse_file_write_iter+0x6d5/0x8c0 fs/fuse/file.c:1791 aio_write+0x3b2/0x8c0 fs/aio.c:1633 __io_submit_one fs/aio.c:2005 [inline] io_submit_one+0x1248/0x1da0 fs/aio.c:2052 __do_compat_sys_io_submit fs/aio.c:2153 [inline] __se_compat_sys_io_submit fs/aio.c:2123 [inline] __ia32_compat_sys_io_submit+0x1ba/0x3a0 fs/aio.c:2123 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: 0023:0xf7f6f579 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:00000000f50f657c EFLAGS: 00000292 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 00000000f50ac000 RCX: 0000000000000001 RDX: 0000000020000300 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:iov_iter_revert lib/iov_iter.c:626 [inline] RIP: 0010:iov_iter_revert+0x533/0x5a0 lib/iov_iter.c:611 Code: 89 e6 48 c7 c7 a0 46 b0 8e e8 89 da 31 00 e9 b1 fd ff ff e8 af 74 64 fd eb 95 e8 d8 74 64 fd e9 46 fb ff ff e8 5e c0 01 fd 90 <0f> 0b 48 8b 3c 24 e8 c2 74 64 fd e9 97 fb ff ff 48 8b 7c 24 08 e8 RSP: 0018:ffffc9000e5ef638 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff848c3ca0 RDX: ffff888024c88000 RSI: ffffffff848c40b2 RDI: 0000000000000001 RBP: ffffc9000e5efb10 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88806a7b6600 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f50f6b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f50ac000 CR3: 0000000068a7a000 CR4: 0000000000352ef0 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