syzbot has found a reproducer for the following issue on: HEAD commit: 9561de3a55be Linux 6.4-rc5 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=146868c9280000 kernel config: https://syzkaller.appspot.com/x/.config?x=7474de833c217bf4 dashboard link: https://syzkaller.appspot.com/bug?extid=a3c8e9ac9f9d77240afd compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ff6e93280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11824101280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7890258233e8/disk-9561de3a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/693d68681275/vmlinux-9561de3a.xz kernel image: https://storage.googleapis.com/syzbot-assets/0f62a882fdf3/bzImage-9561de3a.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/3fc2f5d70218/mount_2.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a3c8e9ac9f9d77240afd@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ Looking for class "&ei->i_data_sem" with key init_once.__key.780, but found a different class "&ei->i_data_sem" with the same key WARNING: CPU: 1 PID: 5249 at kernel/locking/lockdep.c:941 look_up_lock_class+0xc2/0x140 kernel/locking/lockdep.c:938 Modules linked in: CPU: 1 PID: 5249 Comm: syz-executor251 Not tainted 6.4.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:look_up_lock_class+0xc2/0x140 kernel/locking/lockdep.c:938 Code: 8b 16 48 c7 c0 60 91 1e 90 48 39 c2 74 46 f6 05 5d 02 92 03 01 75 3d c6 05 54 02 92 03 01 48 c7 c7 a0 ae ea 8a e8 de 8a a3 f6 <0f> 0b eb 26 e8 f5 d0 80 f9 48 c7 c7 e0 ad ea 8a 89 de e8 37 ca fd RSP: 0018:ffffc900041bf590 EFLAGS: 00010046 RAX: 30aff147e011a400 RBX: ffffffff9006b360 RCX: ffff8880177bd940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900041bf698 R08: ffffffff81530142 R09: ffffed1017325163 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 1ffff92000837ec0 R14: ffff888075bfc888 R15: ffffffff91cac681 FS: 0000555555be9300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6cdfc6138 CR3: 000000002b756000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> register_lock_class+0x104/0x990 kernel/locking/lockdep.c:1290 __lock_acquire+0xd3/0x2070 kernel/locking/lockdep.c:4965 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689 swap_inode_boot_loader fs/ext4/ioctl.c:423 [inline] __ext4_ioctl fs/ext4/ioctl.c:1418 [inline] ext4_ioctl+0x453c/0x5b60 fs/ext4/ioctl.c:1608 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 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: 0033:0x7fc6cdf53a19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdb4dc9718 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 69662f7375622f2e RCX: 00007fc6cdf53a19 RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffdb4dc9740 R09: 00007ffdb4dc9740 R10: 00007ffdb4dc9190 R11: 0000000000000246 R12: 00007ffdb4dc973c R13: 00007ffdb4dc9770 R14: 00007ffdb4dc9750 R15: 0000000000000052 </TASK> --- 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.
