WARNING: suspicious RCU usage 4.14.307-syzkaller #0 Not tainted ----------------------------- net/sched/act_sample.c:95 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.5/10466: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 stack backtrace: CPU: 1 PID: 10466 Comm: syz-executor.5 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 tcf_sample_init+0x71c/0x8c0 net/sched/act_sample.c:95 tcf_action_init_1+0x51a/0x9e0 net/sched/act_api.c:691 tcf_action_init+0x26d/0x400 net/sched/act_api.c:760 tcf_action_add net/sched/act_api.c:1088 [inline] tc_ctl_action+0x2e3/0x510 net/sched/act_api.c:1140 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f4aaba340f9 RSP: 002b:00007f4aa9fa6168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4aabb53f80 RCX: 00007f4aaba340f9 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000004 RBP: 00007f4aaba8fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe075bfaff R14: 00007f4aa9fa6300 R15: 0000000000022000 XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. XFS (loop2): Unmounting Filesystem rock: corrupted directory entry. extent=32, offset=2044, size=237 bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. XFS (loop4): Mounting V4 Filesystem overlayfs: fs on './file0' does not support file handles, falling back to index=off. XFS (loop4): Ending clean mount XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop4): Unmounting Filesystem XFS (loop2): Unmounting Filesystem netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. rock: corrupted directory entry. extent=32, offset=2044, size=237 overlayfs: fs on './file0' does not support file handles, falling back to index=off. XFS (loop4): Mounting V4 Filesystem XFS (loop4): Ending clean mount XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop4): Unmounting Filesystem XFS (loop2): Unmounting Filesystem audit: type=1800 audit(1677501209.766:13): pid=10693 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10687]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc1 data 0xffffffb9 audit: type=1800 audit(1677501209.796:14): pid=10693 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 rock: corrupted directory entry. extent=32, offset=2044, size=237 kvm [10687]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc2 data 0xffffffb9 kvm [10687]: vcpu0, guest rIP: 0x913f ignored wrmsr: 0x11e data 0xffffffb9 audit: type=1800 audit(1677501210.096:15): pid=10714 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10687]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0x186 data 0xffffffb9 audit: type=1800 audit(1677501210.126:16): pid=10714 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10687]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0x187 data 0xffffffb9 audit: type=1800 audit(1677501210.346:17): pid=10728 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 audit: type=1800 audit(1677501210.366:18): pid=10728 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10733]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc1 data 0xffffffb9 kvm [10733]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc2 data 0xffffffb9 audit: type=1800 audit(1677501210.646:19): pid=10745 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10733]: vcpu0, guest rIP: 0x913f ignored wrmsr: 0x11e data 0xffffffb9 audit: type=1800 audit(1677501210.666:20): pid=10745 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=13986 res=0 kvm [10733]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0x186 data 0xffffffb9 kvm [10733]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0x187 data 0xffffffb9 overlayfs: fs on './file0' does not support file handles, falling back to index=off. XFS (loop4): Mounting V4 Filesystem XFS (loop2): Mounting V4 Filesystem XFS (loop4): Ending clean mount XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem XFS (loop4): Unmounting Filesystem kvm [10788]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc1 data 0xffffffb9 kvm [10788]: vcpu0, guest rIP: 0x913f disabled perfctr wrmsr: 0xc2 data 0xffffffb9 kvm [10788]: vcpu0, guest rIP: 0x913f ignored wrmsr: 0x11e data 0xffffffb9 blktrace: Concurrent blktraces are not allowed on loop0 blktrace: Concurrent blktraces are not allowed on loop0 blktrace: Concurrent blktraces are not allowed on loop0 audit: type=1800 audit(1677501212.296:21): pid=10856 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14011 res=0 audit: type=1800 audit(1677501212.316:22): pid=10856 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14011 res=0 kvm [10844]: vcpu0, guest rIP: 0x913f ignored wrmsr: 0x11e data 0xffffffb9 BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop1 BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 EXT4-fs error (device loop0): ext4_ext_check_inode:510: inode #4: comm syz-executor.0: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 2, max 4(4), depth 0(0) EXT4-fs error (device loop0): ext4_quota_enable:5740: comm syz-executor.0: Bad quota inode # 4 EXT4-fs warning (device loop0): ext4_enable_quotas:5780: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix. kvm: emulating exchange as write EXT4-fs (loop0): mount failed netlink: 76 bytes leftover after parsing attributes in process `syz-executor.2'. kauditd_printk_skb: 18 callbacks suppressed audit: type=1800 audit(1677501215.577:41): pid=11066 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14030 res=0 netlink: 76 bytes leftover after parsing attributes in process `syz-executor.2'.