ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
------------[ cut here ]------------
HSR: Could not send supervision frame
WARNING: CPU: 2 PID: 11421 at net/hsr/hsr_device.c:299 send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299
Modules linked in:
CPU: 2 PID: 11421 Comm: syz-executor.2 Not tainted 5.11.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:send_hsr_supervision_frame+0x889/0xb40 net/hsr/hsr_device.c:299
Code: 04 31 ff 89 de e8 f7 83 c5 f8 84 db 0f 85 8b fd ff ff e8 6a 7d c5 f8 48 c7 c7 e0 5b 6d 8a c6 05 1c 12 42 04 01 e8 6b 13 0b 00 <0f> 0b e9 6c fd ff ff e8 4b 7d c5 f8 41 be 42 00 00 00 ba 01 00 00
RSP: 0000:ffffc90000540c68 EFLAGS: 00010286

RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888016e74600 RSI: ffffffff815b69d5 RDI: fffff520000a817f
RBP: 00000000000088fb R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff815afbae R11: 0000000000000000 R12: ffff88805f518880
R13: 0000000000000000 R14: ffff88805f68eca8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802cc00000(0063) knlGS:00000000f550bb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000054 CR3: 0000000065c24000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hsr_announce+0x122/0x320 net/hsr/hsr_device.c:404
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5440 [inline]
RIP: 0010:lock_acquire+0x2c7/0x740 kernel/locking/lockdep.c:5402
Code: 48 c7 c7 80 ab 4b 89 48 83 c4 20 e8 e3 67 a0 07 b8 ff ff ff ff 65 0f c1 05 96 33 a9 7e 83 f8 01 0f 85 36 03 00 00 ff 34 24 9d <e9> 3a fe ff ff 65 ff 05 fd 21 a9 7e 48 8b 05 36 de 96 0b e8 01 5d
RSP: 0000:ffffc9000370fd30 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff920006e1fa8 RCX: 0000000000000001
RDX: 1ffff11002dce9f0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ee4c7bf
R10: fffffbfff1dc98f7 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888022d4dd58 R14: 0000000000000000 R15: 0000000000000001
 down_read_trylock kernel/locking/rwsem.c:1395 [inline]
 down_read_trylock+0x193/0x350 kernel/locking/rwsem.c:1390
 mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 do_user_addr_fault+0x25f/0xc60 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1450 [inline]
 exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1506
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580
RIP: 0023:0x804d916
Code: e8 ef 5f 01 00 83 c4 10 85 c0 0f 84 7d 01 00 00 65 f0 83 2d e4 ff ff ff 01 8b 5c 24 08 e8 a2 05 01 00 8b 00 8b 54 24 0c 85 c0 <89> 42 54 8b 72 50 0f 85 16 01 00 00 83 fe ff 0f 85 0d 01 00 00 8b
RSP: 002b:00000000f550b100 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000000 RCX: 00000000f550b0f0
RDX: 0000000000000000 RSI: 000000000818b0a0 RDI: 000000000815f000
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000