=============================== [ INFO: suspicious RCU usage. ] 4.9.202+ #0 Not tainted ------------------------------- include/linux/radix-tree.h:199 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 2 locks held by syz-executor.2/3566: #0: (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [<0000000029c1934e>] inode_lock include/linux/fs.h:771 [inline] #0: (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [<0000000029c1934e>] shmem_add_seals+0x166/0x1020 mm/shmem.c:2610 #1: (&(&mapping->tree_lock)->rlock){..-...}, at: [<0000000035498ce9>] spin_lock_irq include/linux/spinlock.h:332 [inline] #1: (&(&mapping->tree_lock)->rlock){..-...}, at: [<0000000035498ce9>] shmem_tag_pins mm/shmem.c:2465 [inline] #1: (&(&mapping->tree_lock)->rlock){..-...}, at: [<0000000035498ce9>] shmem_wait_for_pins mm/shmem.c:2506 [inline] #1: (&(&mapping->tree_lock)->rlock){..-...}, at: [<0000000035498ce9>] shmem_add_seals+0x342/0x1020 mm/shmem.c:2622 stack backtrace: CPU: 0 PID: 3566 Comm: syz-executor.2 Not tainted 4.9.202+ #0 ffff8801b21b7ca0 ffffffff81b55d2b ffff8801ab70e908 0000000000000000 0000000000000002 00000000000000c7 ffff8801c93f97c0 ffff8801b21b7cd0 ffffffff81406867 ffffea00067a50c0 dffffc0000000000 ffff8801b21b7d78 Call Trace: [<00000000aa184809>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000aa184809>] dump_stack+0xcb/0x130 lib/dump_stack.c:56 [<000000004e4491ce>] lockdep_rcu_suspicious.cold+0x10a/0x149 kernel/locking/lockdep.c:4458 [<00000000afd49bae>] radix_tree_deref_slot include/linux/radix-tree.h:199 [inline] [<00000000afd49bae>] shmem_tag_pins mm/shmem.c:2467 [inline] [<00000000afd49bae>] shmem_wait_for_pins mm/shmem.c:2506 [inline] [<00000000afd49bae>] shmem_add_seals+0xa44/0x1020 mm/shmem.c:2622 [<00000000602571de>] shmem_fcntl+0xf7/0x130 mm/shmem.c:2657 [<00000000a53cd101>] do_fcntl fs/fcntl.c:340 [inline] [<00000000a53cd101>] SYSC_fcntl fs/fcntl.c:376 [inline] [<00000000a53cd101>] SyS_fcntl+0x1d5/0xb50 fs/fcntl.c:361 [<000000001907845e>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000f59f0609>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb EXT4-fs warning (device loop0): ext4_fill_super:3459: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop0): VFS: Found ext4 filesystem with unknown checksum algorithm. EXT4-fs warning (device loop0): ext4_fill_super:3459: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop0): VFS: Found ext4 filesystem with unknown checksum algorithm. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. EXT4-fs warning (device loop0): ext4_fill_super:3459: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop0): VFS: Found ext4 filesystem with unknown checksum algorithm. EXT4-fs warning (device loop0): ext4_fill_super:3459: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop0): VFS: Found ext4 filesystem with unknown checksum algorithm. ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! selinux_nlmsg_perm: 306 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=327 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=115 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3760 comm=syz-executor.2 ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: ´ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured! ip6_tunnel: keyring xmit: Local address not yet configured!