Hello, syzbot found the following issue on: HEAD commit: 9c54130c Add linux-next specific files for 20210406 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1654617ed00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d125958c3995ddcd dashboard link: https://syzkaller.appspot.com/bug?extid=d6a0e4b80bd39f54c2f6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101a5786d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1147dd0ed00000 The issue was bisected to: commit 997acaf6b4b59c6a9c259740312a69ea549cc684 Author: Mark Rutland <mark.rutland@xxxxxxx> Date: Mon Jan 11 15:37:07 2021 +0000 lockdep: report broken irq restoration bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11d8d7aad00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13d8d7aad00000 console output: https://syzkaller.appspot.com/x/log.txt?x=15d8d7aad00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d6a0e4b80bd39f54c2f6@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration") loop0: detected capacity change from 0 to 31 BUG: spinlock bad magic on CPU#1, syz-executor062/8434 lock: 0xffff8880b9c31d60, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 CPU: 1 PID: 8434 Comm: syz-executor062 Not tainted 5.12.0-rc6-next-20210406-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x216/0x2b0 kernel/locking/spinlock_debug.c:112 erofs_pcpubuf_growsize+0x36f/0x620 fs/erofs/pcpubuf.c:83 z_erofs_load_lz4_config+0x1ef/0x3e0 fs/erofs/decompressor.c:64 erofs_read_superblock fs/erofs/super.c:331 [inline] erofs_fc_fill_super+0xe84/0x1d10 fs/erofs/super.c:499 get_tree_bdev+0x440/0x760 fs/super.c:1293 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x132a/0x1fa0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount fs/namespace.c:3433 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x444f7a Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007ffe1fa3c2a8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffe1fa3c300 RCX: 0000000000444f7a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe1fa3c2c0 RBP: 00007ffe1fa3c2c0 R08: 00007ffe1fa3c300 R09: --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
