------------[ cut here ]------------ kernel BUG at lib/iov_iter.c:626! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 6775 Comm: syz.5.176 Not tainted 6.13.0-rc2-syzkaller-00362-g2d8308bf5b67 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:iov_iter_revert+0x420/0x590 lib/iov_iter.c:626 Code: 42 80 3c 20 00 48 8b 1c 24 74 08 48 89 df e8 57 47 45 fd 4c 89 2b e9 04 01 00 00 45 85 ed 48 8b 3c 24 75 16 e8 a1 dd de fc 90 <0f> 0b 41 83 fd 05 48 8b 3c 24 0f 84 58 01 00 00 48 89 f8 48 c1 e8 RSP: 0018:ffffc900030a7870 EFLAGS: 00010293 RAX: ffffffff84c0809f RBX: 0000000000000023 RCX: ffff88801e319e00 RDX: 0000000000000000 RSI: ffffffff8f08b130 RDI: ffffc900030a7d80 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff84c07d84 R10: 0000000000000004 R11: ffff88801e319e00 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc900030a7d70 R15: ffffffffffffffdd FS: 0000000000000000(0000) GS:ffff8880b8700000(0063) knlGS:00000000f5106b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002f01fffc CR3: 00000000328fa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_direct_io+0x30b3/0x31f0 fs/fuse/file.c:1667 fuse_direct_write_iter fs/fuse/file.c:1742 [inline] fuse_file_write_iter+0xae2/0xf70 fs/fuse/file.c:1787 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:679 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fb4579 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 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f510655c EFLAGS: 00000206 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000000023 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:iov_iter_revert+0x420/0x590 lib/iov_iter.c:626 Code: 42 80 3c 20 00 48 8b 1c 24 74 08 48 89 df e8 57 47 45 fd 4c 89 2b e9 04 01 00 00 45 85 ed 48 8b 3c 24 75 16 e8 a1 dd de fc 90 <0f> 0b 41 83 fd 05 48 8b 3c 24 0f 84 58 01 00 00 48 89 f8 48 c1 e8 RSP: 0018:ffffc900030a7870 EFLAGS: 00010293 RAX: ffffffff84c0809f RBX: 0000000000000023 RCX: ffff88801e319e00 RDX: 0000000000000000 RSI: ffffffff8f08b130 RDI: ffffc900030a7d80 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff84c07d84 R10: 0000000000000004 R11: ffff88801e319e00 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc900030a7d70 R15: ffffffffffffffdd FS: 0000000000000000(0000) GS:ffff8880b8700000(0063) knlGS:00000000f5106b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000055fce307e950 CR3: 00000000328fa000 CR4: 00000000003526f0 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: 90 nop 31: 90 nop 32: 90 nop 33: 90 nop 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop