Hello, syzbot found the following issue on: HEAD commit: 6a30d3e3491d selftests: net: Use "grep -E" instead of "egr.. git tree: net console+strace: https://syzkaller.appspot.com/x/log.txt?x=1576b11d880000 kernel config: https://syzkaller.appspot.com/x/.config?x=cc4b2e0a8e8a8366 dashboard link: https://syzkaller.appspot.com/bug?extid=04c21ed96d861dccc5cd compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14e1656b880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1077da23880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bbee3d5fc908/disk-6a30d3e3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bf9e258de70e/vmlinux-6a30d3e3.xz kernel image: https://storage.googleapis.com/syzbot-assets/afaa6696b9e0/bzImage-6a30d3e3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+04c21ed96d861dccc5cd@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: TASK stack guard page was hit at ffffc90003cd7fa8 (stack is ffffc90003cd8000..ffffc90003ce0000) stack guard page: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3636 Comm: syz-executor238 Not tainted 6.1.0-rc7-syzkaller-00135-g6a30d3e3491d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:mark_lock.part.0+0x26/0x1910 kernel/locking/lockdep.c:4593 Code: 00 00 00 00 41 57 41 56 41 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 49 89 f4 55 53 48 81 ec 38 01 00 00 48 8d 5c 24 38 <48> 89 3c 24 48 c7 44 24 38 b3 8a b5 41 48 c1 eb 03 48 c7 44 24 40 RSP: 0018:ffffc90003cd7fb8 EFLAGS: 00010096 RAX: 0000000000000004 RBX: ffffc90003cd7ff0 RCX: ffffffff8162a7bf RDX: dffffc0000000000 RSI: ffff88801f65e238 RDI: ffff88801f65d7c0 RBP: ffff88801f65e25a R08: 0000000000000000 R09: ffffffff910f4aff R10: fffffbfff221e95f R11: 0000000000000000 R12: ffff88801f65e238 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000040000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003cd7fa8 CR3: 000000000c28e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> mark_lock kernel/locking/lockdep.c:4598 [inline] mark_usage kernel/locking/lockdep.c:4543 [inline] __lock_acquire+0x847/0x56d0 kernel/locking/lockdep.c:5009 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 lock_sock_nested+0x3a/0xf0 net/core/sock.c:3447 lock_sock include/net/sock.h:1721 [inline] sock_map_close+0x75/0x7b0 net/core/sock_map.c:1610 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 sock_map_close+0x6dc/0x7b0 net/core/sock_map.c:1616 inet_release+0x132/0x270 net/ipv4/af_inet.c:428 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:488 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x1c/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb3d/0x2a30 kernel/exit.c:820 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x21b1/0x2440 kernel/signal.c:2858 arch_do_signal_or_restart+0x86/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f48595660b9 Code: Unable to access opcode bytes at 0x7f485956608f. RSP: 002b:00007ffebff98f98 EFLAGS: 00000246 ORIG_RAX: 0000000000000120 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 00007f48595660b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffebff99138 R09: 00007ffebff99138 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4859529940 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mark_lock.part.0+0x26/0x1910 kernel/locking/lockdep.c:4593 Code: 00 00 00 00 41 57 41 56 41 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 49 89 f4 55 53 48 81 ec 38 01 00 00 48 8d 5c 24 38 <48> 89 3c 24 48 c7 44 24 38 b3 8a b5 41 48 c1 eb 03 48 c7 44 24 40 RSP: 0018:ffffc90003cd7fb8 EFLAGS: 00010096 RAX: 0000000000000004 RBX: ffffc90003cd7ff0 RCX: ffffffff8162a7bf RDX: dffffc0000000000 RSI: ffff88801f65e238 RDI: ffff88801f65d7c0 RBP: ffff88801f65e25a R08: 0000000000000000 R09: ffffffff910f4aff R10: fffffbfff221e95f R11: 0000000000000000 R12: ffff88801f65e238 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000040000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003cd7fa8 CR3: 000000000c28e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 41 57 push %r15 6: 41 56 push %r14 8: 41 55 push %r13 a: 41 89 d5 mov %edx,%r13d d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 41 54 push %r12 19: 49 89 f4 mov %rsi,%r12 1c: 55 push %rbp 1d: 53 push %rbx 1e: 48 81 ec 38 01 00 00 sub $0x138,%rsp 25: 48 8d 5c 24 38 lea 0x38(%rsp),%rbx * 2a: 48 89 3c 24 mov %rdi,(%rsp) <-- trapping instruction 2e: 48 c7 44 24 38 b3 8a movq $0x41b58ab3,0x38(%rsp) 35: b5 41 37: 48 c1 eb 03 shr $0x3,%rbx 3b: 48 rex.W 3c: c7 .byte 0xc7 3d: 44 24 40 rex.R and $0x40,%al --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
