================================================================== BUG: KASAN: user-memory-access in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] BUG: KASAN: user-memory-access in atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] BUG: KASAN: user-memory-access in atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] BUG: KASAN: user-memory-access in atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] BUG: KASAN: user-memory-access in dst_hold_safe include/net/dst.h:297 [inline] BUG: KASAN: user-memory-access in ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1050 Read of size 4 at addr 000000010000003f by task syz-executor.2/27235 CPU: 1 PID: 27235 Comm: syz-executor.2 Not tainted 5.2.0-rc2+ #25 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+0x172/0x1f0 lib/dump_stack.c:113 __kasan_report.cold+0x5/0x40 mm/kasan/report.c:321 kasan_report+0x12/0x20 mm/kasan/common.c:614 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 kasan_check_read+0x11/0x20 mm/kasan/common.c:94 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] atomic_fetch_add_unless include/linux/atomic-fallback.h:1086 [inline] atomic_add_unless include/linux/atomic-fallback.h:1111 [inline] atomic_inc_not_zero include/linux/atomic-fallback.h:1127 [inline] dst_hold_safe include/net/dst.h:297 [inline] ip6_hold_safe+0xad/0x380 net/ipv6/route.c:1050 rt6_get_pcpu_route net/ipv6/route.c:1277 [inline] ip6_pol_route+0x336/0x1010 net/ipv6/route.c:2028 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2204 fib6_rule_lookup+0x279/0x5a0 net/ipv6/fib6_rules.c:120 ip6_route_output_flags+0x2c4/0x350 net/ipv6/route.c:2233 ip6_route_output include/net/ip6_route.h:89 [inline] icmpv6_xrlim_allow+0x11e/0x440 net/ipv6/icmp.c:212 icmp6_send+0x1107/0x1e50 net/ipv6/icmp.c:540 icmpv6_send+0xec/0x230 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x2b/0x530 net/ipv6/route.c:2367 dst_link_failure include/net/dst.h:416 [inline] ndisc_error_report+0xce/0x1c0 net/ipv6/ndisc.c:712 neigh_invalidate+0x245/0x570 net/core/neighbour.c:1000 neigh_timer_handler+0xc33/0xf30 net/core/neighbour.c:1086 call_timer_fn+0x193/0x720 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698 __do_softirq+0x25c/0x94c kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:kfree+0x183/0x220 mm/slab.c:3756 Code: 58 7e 0f 85 b6 fe ff ff e8 eb f2 56 ff e9 ac fe ff ff e8 60 ab cc ff 48 83 3d 88 00 09 07 00 0f 84 9e 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 41 5c 41 5d 41 5e 5d c3 4c 89 f2 4c 89 e6 4c 89 RSP: 0018:ffff888098b07bb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888085490b00 RDI: 0000000000000286 RBP: ffff888098b07bd0 R08: ffff888085490280 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888096751500 R13: ffff8880aa4001c0 R14: ffffffff82fcacf9 R15: ffff888098b07da0 tomoyo_path_number_perm+0x459/0x520 security/tomoyo/file.c:736 tomoyo_file_ioctl+0x23/0x30 security/tomoyo/tomoyo.c:335 security_file_ioctl+0x77/0xc0 security/security.c:1370 ksys_ioctl+0x57/0xd0 fs/ioctl.c:711 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9ae7f38c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9 RDX: 00000000200000c0 RSI: 00000000400454d1 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9ae7f396d4 R13: 00000000004c3dc0 R14: 00000000004d79e8 R15: 00000000ffffffff ==================================================================