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: 26889 Comm: syz.0.5936 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #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 80 34 90 8e e8 49 db 31 00 e9 b1 fd ff ff e8 1f 4e 65 fd eb 95 e8 48 4e 65 fd e9 46 fb ff ff e8 de da 02 fd 90 <0f> 0b 48 8b 3c 24 e8 32 4e 65 fd e9 97 fb ff ff 48 8b 7c 24 08 e8 RSP: 0018:ffffc9000674f7a8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff84967000 RDX: ffff888023820000 RSI: ffffffff84967412 RDI: 0000000000000001 RBP: ffffc9000674fd20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000a201e R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888000a02200 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f5070b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000050bc2000 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_write_iter+0x64f/0x830 fs/fuse/file.c:1742 fuse_file_write_iter+0x66e/0x8c0 fs/fuse/file.c:1787 do_iter_readv_writev+0x532/0x7f0 fs/read_write.c:820 vfs_writev+0x363/0xdd0 fs/read_write.c:1050 do_writev+0x297/0x340 fs/read_write.c:1096 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: 0023:0xf707e579 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:00000000f507055c EFLAGS: 00000296 ORIG_RAX: 0000000000000092 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000020000000 RDX: 0000000000000001 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 80 34 90 8e e8 49 db 31 00 e9 b1 fd ff ff e8 1f 4e 65 fd eb 95 e8 48 4e 65 fd e9 46 fb ff ff e8 de da 02 fd 90 <0f> 0b 48 8b 3c 24 e8 32 4e 65 fd e9 97 fb ff ff 48 8b 7c 24 08 e8 RSP: 0018:ffffc9000674f7a8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff84967000 RDX: ffff888023820000 RSI: ffffffff84967412 RDI: 0000000000000001 RBP: ffffc9000674fd20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000a201e R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888000a02200 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f5070b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000050bc2000 CR4: 0000000000352ef0 DR0: 0040000000000000 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