gfs2: fsid=syz:syz.0: first mount done, others may mount ============================= WARNING: suspicious RCU usage 6.6.0-rc6-next-20231018-syzkaller #0 Not tainted ----------------------------- fs/gfs2/inode.c:1877 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 no locks held by syz-executor120/5052. stack backtrace: CPU: 1 PID: 5052 Comm: syz-executor120 Not tainted 6.6.0-rc6-next-20231018-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6711 gfs2_permission+0x3f9/0x4c0 fs/gfs2/inode.c:1877 do_inode_permission fs/namei.c:462 [inline] inode_permission fs/namei.c:529 [inline] inode_permission+0x384/0x5e0 fs/namei.c:504 may_open+0x11c/0x400 fs/namei.c:3249 do_open fs/namei.c:3619 [inline] path_openat+0x17aa/0x2ce0 fs/namei.c:3778 do_filp_open+0x1de/0x430 fs/namei.c:3808 do_sys_openat2+0x176/0x1e0 fs/open.c:1440 do_sys_open fs/open.c:1455 [inline] __do_sys_openat fs/open.c:1471 [inline] __se_sys_openat fs/open.c:1466 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1466 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f5b23a31a11 Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 7a 06 0b 00 00 74 6d 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 93 00 00 00 48 8b 54 24 28 64 48 2b 14 25 RSP: 002b:00007ffe9ecd33a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000010000 RCX: 00007f5b23a31a11 RDX: 0000000000010000 RSI: 0000000020037f80 RDI: 00000000ffffff9c RBP: 0000000020037f80 R08: 00007ffe9ecd3470 R09: 0000000000037f13 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe9ecd3470 R14: 0000000000000003 R15: 0000000001000000