BUG: sleeping function called from invalid context at kernel/locking/mutex.c:935 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7825, name: syz-executor934 2 locks held by syz-executor934/7825: #0: ffffffff88b01b50 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff88b01b50 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5220 #1: ffff888097df2c80 (&(&sch->q.lock)->rlock){+...}, at: spin_lock_bh include/linux/spinlock.h:343 [inline] #1: ffff888097df2c80 (&(&sch->q.lock)->rlock){+...}, at: sch_tree_lock include/net/sch_generic.h:544 [inline] #1: ffff888097df2c80 (&(&sch->q.lock)->rlock){+...}, at: sfb_change+0x284/0xd30 net/sched/sch_sfb.c:519 Preemption disabled at: [] spin_lock_bh include/linux/spinlock.h:343 [inline] [] sch_tree_lock include/net/sch_generic.h:544 [inline] [] sfb_change+0x284/0xd30 net/sched/sch_sfb.c:519 CPU: 1 PID: 7825 Comm: syz-executor934 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113 ___might_sleep+0x448/0x5e0 kernel/sched/core.c:6807 __might_sleep+0x8f/0x100 kernel/sched/core.c:6760 __mutex_lock_common+0x4e/0x2820 kernel/locking/mutex.c:935 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1b/0x30 kernel/locking/mutex.c:1118 tcf_chain0_head_change_cb_del+0x30/0x390 net/sched/cls_api.c:774 tcf_block_put_ext+0x3d/0x2a0 net/sched/cls_api.c:1345 tcf_block_put+0x6e/0x90 net/sched/cls_api.c:1358 sfb_destroy+0x47/0x70 net/sched/sch_sfb.c:467 qdisc_destroy+0x147/0x4d0 net/sched/sch_generic.c:968 qdisc_put+0x5d/0x90 net/sched/sch_generic.c:995 sfb_change+0x52d/0xd30 net/sched/sch_sfb.c:522 qdisc_change net/sched/sch_api.c:1321 [inline] tc_modify_qdisc+0x184d/0x1ea0 net/sched/sch_api.c:1623 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5223 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5241 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x787/0x900 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x993/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg net/socket.c:657 [inline] ___sys_sendmsg+0x60d/0x910 net/socket.c:2311 __sys_sendmsg net/socket.c:2356 [inline] __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x17c/0x200 net/socket.c:2363 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447769 Code: e8 5c b5 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 ab 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2dda6f7db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000006e29e8 RCX: 0000000000447769 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000006 RBP: 00000000006e29e0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00000000006e29ec R13: 00007ffd425d047f R14: 00007f2dda6f89c0 R15: 0000000000000000