Hello, syzbot found the following issue on: HEAD commit: 2030579113a1 Add linux-next specific files for 20231020 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=14e75739680000 kernel config: https://syzkaller.appspot.com/x/.config?x=37404d76b3c8840e dashboard link: https://syzkaller.appspot.com/bug?extid=ba2c35eb32f5a85137f8 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=125607f5680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12a22e93680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a99a981e5d78/disk-20305791.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/073a5ba6a2a6/vmlinux-20305791.xz kernel image: https://storage.googleapis.com/syzbot-assets/c7c1a7107f7b/bzImage-20305791.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/81394ce5859f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ba2c35eb32f5a85137f8@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc001ffff11a: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x00000000ffff88d0-0x00000000ffff88d7] CPU: 1 PID: 5052 Comm: udevd Not tainted 6.6.0-rc6-next-20231020-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:list_empty include/linux/list.h:373 [inline] RIP: 0010:locks_remove_posix+0x100/0x510 fs/locks.c:2555 Code: 4d 8b ae 20 02 00 00 4d 85 ed 0f 84 0c 02 00 00 e8 15 60 7d ff 49 8d 55 50 48 b9 00 00 00 00 00 fc ff df 48 89 d6 48 c1 ee 03 <80> 3c 0e 00 0f 85 ae 03 00 00 49 8b 45 50 48 39 c2 0f 84 db 01 00 RSP: 0018:ffffc90003d6f948 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff8880271cca00 RCX: dffffc0000000000 RDX: 00000000ffff88d0 RSI: 000000001ffff11a RDI: ffff8880796982e0 RBP: 1ffff920007adf2b R08: 0000000000000003 R09: 0000000000004000 R10: 0000000000000000 R11: dffffc0000000000 R12: ffffc90003d6f988 R13: 00000000ffff8880 R14: ffff8880796980c0 R15: ffff8880271ccb90 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc227c3e000 CR3: 000000002000e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> filp_flush+0x11b/0x1a0 fs/open.c:1554 filp_close+0x1c/0x30 fs/open.c:1563 close_files fs/file.c:432 [inline] put_files_struct fs/file.c:447 [inline] put_files_struct+0x1df/0x360 fs/file.c:444 exit_files+0x82/0xb0 fs/file.c:464 do_exit+0xa51/0x2ac0 kernel/exit.c:866 do_group_exit+0xd3/0x2a0 kernel/exit.c:1021 get_signal+0x2391/0x2760 kernel/signal.c:2904 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11c/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc2276be3cd Code: Unable to access opcode bytes at 0x7fc2276be3a3. RSP: 002b:00007ffd929ccc20 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea RAX: 0000000000000000 RBX: 00007fc227b0bc80 RCX: 00007fc2276be3cd RDX: 0000000000000006 RSI: 00000000000013bc RDI: 00000000000013bc RBP: 00000000000013bc R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000006 R13: 00007ffd929cce30 R14: 0000000000001000 R15: 0000000000000000 </TASK> Modules linked in: ---------------- Code disassembly (best guess): 0: 4d 8b ae 20 02 00 00 mov 0x220(%r14),%r13 7: 4d 85 ed test %r13,%r13 a: 0f 84 0c 02 00 00 je 0x21c 10: e8 15 60 7d ff call 0xff7d602a 15: 49 8d 55 50 lea 0x50(%r13),%rdx 19: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 20: fc ff df 23: 48 89 d6 mov %rdx,%rsi 26: 48 c1 ee 03 shr $0x3,%rsi * 2a: 80 3c 0e 00 cmpb $0x0,(%rsi,%rcx,1) <-- trapping instruction 2e: 0f 85 ae 03 00 00 jne 0x3e2 34: 49 8b 45 50 mov 0x50(%r13),%rax 38: 48 39 c2 cmp %rax,%rdx 3b: 0f .byte 0xf 3c: 84 db test %bl,%bl 3e: 01 00 add %eax,(%rax) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
