rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=593c/1/0x4000000000000000 softirq=19343/19346 fqs=4584
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   987721          0            0
rcu: 	cputime:    24092      28387           91   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10613 q=3481 ncpus=2)
CPU: 0 UID: 0 PID: 6924 Comm: syz.1.461 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:unwind_next_frame+0x9/0x2390
Code: 03 38 c1 7c 92 48 89 df e8 04 97 b0 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 48 81 ec 98 00 00 00 49 89 fe 48 bd 00 00 00 00 00
RSP: 0018:ffffc90000007788 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000007860 RCX: 8250b11a589fff00
RDX: dffffc0000000000 RSI: ffffffff8173b1e1 RDI: ffffc900000077a8
RBP: ffffc90000007830 R08: ffffc90000007870 R09: 0000000000000012
R10: dffffc0000000000 R11: ffffffff81acf520 R12: ffff88803b7c0000
R13: 0000000000000000 R14: ffffffff81acf520 R15: ffffc900000077a8
FS:  00007f57677516c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000c000 CR3: 0000000113c78000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 rcu_core+0xca8/0x1710
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_is_held_type+0x137/0x190
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 82 31 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90006f86eb8 EFLAGS: 00000206
RAX: 8250b11a589fff00 RBX: 0000000000000000 RCX: 8250b11a589fff00
RDX: 0000000000000000 RSI: ffffffff8db863e2 RDI: ffffffff8be29f80
RBP: 00000000ffffffff R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000246
R13: ffff88803b7c0000 R14: ffffffff8e13f160 R15: ffff8880b861f000
 __schedule+0x274/0x4d00
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 down_read_trylock+0x258/0x380
 lock_mm_and_find_vma+0x32/0x300
 do_user_addr_fault+0x331/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 fd 00 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc90006f874b8 EFLAGS: 00010202
RAX: 0000000000000004 RBX: ffff88803d3f0311 RCX: 0000000000000104
RDX: 0000000000000001 RSI: 000020000000bfff RDI: ffff88803d3fc190
RBP: ffffc90006f87608 R08: ffff88803d3fc9b3 R09: 1ffff11007a7f936
R10: dffffc0000000000 R11: ffffed1007a7f937 R12: dffffc0000000000
R13: 000000000000c6a3 R14: 00007ffffffff000 R15: 000020000000c823
 _copy_from_iter+0x5f6/0x16f0
 skb_copy_datagram_from_iter+0xf5/0x720
 packet_sendmsg+0x377a/0x5060
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f576698eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5767751038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5766bb5fa0 RCX: 00007f576698eb69
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f5766a11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5766bb5fa0 R15: 00007fffd11ee2c8
 </TASK>
sched: DL replenish lagged too much
