Hello, syzbot found the following issue on: HEAD commit: bfa3037d8280 Merge tag 'fuse-update-6.5' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1533fa14a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=27e33fd2346a54b dashboard link: https://syzkaller.appspot.com/bug?extid=c2b68bdf76e442836443 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=111c904ea80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116b0faaa80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2869ea56e997/disk-bfa3037d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/06fd8fb45baf/vmlinux-bfa3037d.xz kernel image: https://storage.googleapis.com/syzbot-assets/1c5715f42344/bzImage-bfa3037d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/96d1ec5db296/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c2b68bdf76e442836443@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, maybe for address 0xffffc90003e0fdc8: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4473 Comm: udevd Not tainted 6.5.0-rc2-syzkaller-00052-gbfa3037d8280 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:__wake_up_common+0x13c/0x5a0 kernel/sched/wait.c:107 Code: c6 04 75 6e 49 8d 78 10 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1c 03 00 00 48 8b 4c 24 08 4c 89 c7 8b 54 24 10 8b 74 24 04 <41> ff 50 10 85 c0 78 2d 74 11 41 83 e6 01 74 0b 83 6c 24 14 01 0f RSP: 0018:ffffc900031cf790 EFLAGS: 00010046 RAX: 1ffff920007c1fb9 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffc90003e0fdb8 RBP: ffff8880273470d0 R08: ffffc90003e0fdb8 R09: ffffc900031cf830 R10: 0000000000000003 R11: 0000000000094000 R12: ffffc900031cf830 R13: dffffc0000000000 R14: 00000000ffff8880 R15: 816f3352ffff8868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000fffffffe CR3: 000000000c776000 CR4: 0000000000350ef0 Call Trace: <TASK> __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 ep_poll_callback+0x316/0xc10 fs/eventpoll.c:1242 __wake_up_common+0x140/0x5a0 kernel/sched/wait.c:107 __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 signalfd_notify include/linux/signalfd.h:22 [inline] __send_signal_locked+0x94b/0x11d0 kernel/signal.c:1173 do_send_sig_info kernel/signal.c:1296 [inline] group_send_sig_info+0x2ad/0x310 kernel/signal.c:1446 forget_original_parent kernel/exit.c:709 [inline] exit_notify kernel/exit.c:734 [inline] do_exit+0xd9d/0x2a20 kernel/exit.c:894 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x23ea/0x2770 kernel/signal.c:2877 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8fae30e3cd Code: Unable to access opcode bytes at 0x7f8fae30e3a3. RSP: 002b:00007ffea9c17ff0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8fae30e3cd RDX: 0000000000000006 RSI: 0000000000001179 RDI: 0000000000001179 RBP: 0000000000001179 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000006 R13: 00007ffea9c18200 R14: 0000000000001000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__wake_up_common+0x13c/0x5a0 kernel/sched/wait.c:107 Code: c6 04 75 6e 49 8d 78 10 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1c 03 00 00 48 8b 4c 24 08 4c 89 c7 8b 54 24 10 8b 74 24 04 <41> ff 50 10 85 c0 78 2d 74 11 41 83 e6 01 74 0b 83 6c 24 14 01 0f RSP: 0018:ffffc900031cf790 EFLAGS: 00010046 RAX: 1ffff920007c1fb9 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffc90003e0fdb8 RBP: ffff8880273470d0 R08: ffffc90003e0fdb8 R09: ffffc900031cf830 R10: 0000000000000003 R11: 0000000000094000 R12: ffffc900031cf830 R13: dffffc0000000000 R14: 00000000ffff8880 R15: 816f3352ffff8868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000fffffffe CR3: 000000000c776000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: c6 04 75 6e 49 8d 78 movb $0x10,0x788d496e(,%rsi,2) 7: 10 8: 48 89 f8 mov %rdi,%rax b: 48 c1 e8 03 shr $0x3,%rax f: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 14: 0f 85 1c 03 00 00 jne 0x336 1a: 48 8b 4c 24 08 mov 0x8(%rsp),%rcx 1f: 4c 89 c7 mov %r8,%rdi 22: 8b 54 24 10 mov 0x10(%rsp),%edx 26: 8b 74 24 04 mov 0x4(%rsp),%esi * 2a: 41 ff 50 10 call *0x10(%r8) <-- trapping instruction 2e: 85 c0 test %eax,%eax 30: 78 2d js 0x5f 32: 74 11 je 0x45 34: 41 83 e6 01 and $0x1,%r14d 38: 74 0b je 0x45 3a: 83 6c 24 14 01 subl $0x1,0x14(%rsp) 3f: 0f .byte 0xf --- 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 change 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
