general protection fault, probably for non-canonical address 0xdffffc00000000bc: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000005e0-0x00000000000005e7]
CPU: 0 PID: 18063 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ip6_output+0x231/0x3f0 net/ipv6/ip6_output.c:237
Code: 3c 1e 00 49 89 df 74 08 4c 89 ef e8 19 33 e6 f7 48 8b 44 24 20 49 89 45 00 49 89 c5 48 8d 9d e0 05 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 4c 8b 74 24 28 0f 85 61 01 00 00 8b 1b 31 ff
RSP: 0018:ffffc900000076b0 EFLAGS: 00010202
RAX: 00000000000000bc RBX: 00000000000005e0 RCX: ffff88806ca41e00
RDX: 0000000000000302 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8a12035a R09: 1ffffffff1f0d5cd
R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: ffff888064c84b40
R13: ffff888048aac000 R14: 1ffff1100c99096a R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a21000 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x590/0x9d0 net/ipv6/ip6_udp_tunnel.c:111
tipc_udp_xmit+0x6a3/0xa10 net/tipc/udp_media.c:217
tipc_udp_send_msg+0x26b/0x3d0 net/tipc/udp_media.c:268
tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:571
tipc_disc_timeout+0x5ee/0x760 net/tipc/discover.c:338
call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers kernel/time/timer.c:2408 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2419
run_timer_base kernel/time/timer.c:2428 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438
__do_softirq+0x2bc/0x943 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x25b/0x530 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 d3 9a 86 00 f6 44 24 61 02 0f 85 8e 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900038af1e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000715e48 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8baad3a0 RDI: ffffffff8bfec660
RBP: ffffc900038af328 R08: ffffffff92cc7507 R09: 1ffffffff2598ea0
R10: dffffc0000000000 R11: fffffbfff2598ea1 R12: 1ffff92000715e44
R13: dffffc0000000000 R14: ffffc900038af240 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:873 [inline]
pfn_valid+0x113/0x440 include/linux/mmzone.h:2016
page_table_check_clear+0x21/0x730 mm/page_table_check.c:68
zap_pte_range mm/memory.c:1452 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x1f7a/0x3610 mm/memory.c:1668
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758
exit_mmap+0x2c6/0xd40 mm/mmap.c:3287
__mmput+0x115/0x3c0 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x176e/0x1850 kernel/signal.c:2907
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f194227de69
Code: Unable to access opcode bytes at 0x7f194227de3f.
RSP: 002b:00007f1942fe8178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f19423abf88 RCX: 00007f194227de69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f19423abf88
RBP: 00007f19423abf80 R08: 00007f1942fe86c0 R09: 00007f1942fe86c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f19423abf8c
R13: 000000000000000b R14: 00007ffd9622d920 R15: 00007ffd9622da08
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip6_output+0x231/0x3f0 net/ipv6/ip6_output.c:237
Code: 3c 1e 00 49 89 df 74 08 4c 89 ef e8 19 33 e6 f7 48 8b 44 24 20 49 89 45 00 49 89 c5 48 8d 9d e0 05 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 4c 8b 74 24 28 0f 85 61 01 00 00 8b 1b 31 ff
RSP: 0018:ffffc900000076b0 EFLAGS: 00010202
RAX: 00000000000000bc RBX: 00000000000005e0 RCX: ffff88806ca41e00
RDX: 0000000000000302 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8a12035a R09: 1ffffffff1f0d5cd
R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: ffff888064c84b40
R13: ffff888048aac000 R14: 1ffff1100c99096a R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a21000 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 3c 1e cmp $0x1e,%al
2: 00 49 89 add %cl,-0x77(%rcx)
5: df 74 08 4c fbstp 0x4c(%rax,%rcx,1)
9: 89 ef mov %ebp,%edi
b: e8 19 33 e6 f7 call 0xf7e63329
10: 48 8b 44 24 20 mov 0x20(%rsp),%rax
15: 49 89 45 00 mov %rax,0x0(%r13)
19: 49 89 c5 mov %rax,%r13
1c: 48 8d 9d e0 05 00 00 lea 0x5e0(%rbp),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 4c 8b 74 24 28 mov 0x28(%rsp),%r14
36: 0f 85 61 01 00 00 jne 0x19d
3c: 8b 1b mov (%rbx),%ebx
3e: 31 ff xor %edi,%edi