Hello, syzbot found the following issue on: HEAD commit: ce55c22ec8b2 Merge tag 'net-6.6-rc7' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11c0c24d680000 kernel config: https://syzkaller.appspot.com/x/.config?x=849fe52ba7c6d78a dashboard link: https://syzkaller.appspot.com/bug?extid=a76a065ad30c6ddea4a1 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17e511bd680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f6762ae43666/disk-ce55c22e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9b2c191a2c66/vmlinux-ce55c22e.xz kernel image: https://storage.googleapis.com/syzbot-assets/931e7d3d48a1/bzImage-ce55c22e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/60186123065f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a76a065ad30c6ddea4a1@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888066862f70, owner = 0x0, curr 0xffff88807d629dc0, list empty WARNING: CPU: 1 PID: 9840 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 1 PID: 9840 at kernel/locking/rwsem.c:1370 up_write+0x4f4/0x580 kernel/locking/rwsem.c:1626 Modules linked in: CPU: 1 PID: 9840 Comm: syz-executor.5 Not tainted 6.6.0-rc6-syzkaller-00182-gce55c22ec8b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline] RIP: 0010:up_write+0x4f4/0x580 kernel/locking/rwsem.c:1626 Code: 48 c7 c7 a0 98 0a 8b 48 c7 c6 e0 9a 0a 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 e0 e9 e7 ff 48 83 c4 08 <0f> 0b e9 75 fd ff ff 48 c7 c1 90 dd 99 8e 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000b3ffca0 EFLAGS: 00010296 RAX: da70038a13777500 RBX: ffffffff8b0a9980 RCX: ffff88807d629dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000b3ffd70 R08: ffffffff81543302 R09: 1ffff9200167fee8 R10: dffffc0000000000 R11: fffff5200167fee9 R12: 0000000000000000 R13: ffff888066862f70 R14: 1ffff9200167ff9c R15: dffffc0000000000 FS: 00007f0d80dfe6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ea5934000 CR3: 0000000073a48000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> inode_unlock include/linux/fs.h:807 [inline] unlock_mount fs/namespace.c:2508 [inline] __do_sys_pivot_root fs/namespace.c:4252 [inline] __se_sys_pivot_root+0x591/0x1650 fs/namespace.c:4166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0d81a7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0d80dfe0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000009b RAX: ffffffffffffffda RBX: 00007f0d81b9c050 RCX: 00007f0d81a7cae9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000020000000 RBP: 00007f0d81ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0d81b9c050 R15: 00007ffdbee6f518 </TASK> --- 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
