==================================================================
BUG: KASAN: slab-out-of-bounds in tcp_retransmit_timer+0x2ef3/0x3360 net/ipv4/tcp_timer.c:511
Read of size 8 at addr ffff88807bcb9e40 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.17.0-syzkaller-08150-g169e77764adc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0xa5/0x3e0 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
tcp_retransmit_timer+0x2ef3/0x3360 net/ipv4/tcp_timer.c:511
tcp_write_timer_handler+0x5e6/0xbc0 net/ipv4/tcp_timer.c:622
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:642
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:116 [inline]
RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:556
Code: 89 de e8 dd 8e 14 f8 84 db 75 ac e8 54 8c 14 f8 e8 4f d2 1a f8 eb 0c e8 48 8c 14 f8 0f 00 2d 61 70 cd 00 e8 3c 8c 14 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 17 90 14 f8 48 85 db
RSP: 0018:ffffffff8ba07d60 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8babc6c0 RSI: ffffffff896486e4 RDI: ffffffff896486d1
RBP: ffff8880131d7864 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817f5958 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880131d7800 R14: ffff8880131d7864 R15: ffff888146908804
acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:692
cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3e8/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
start_kernel+0x47f/0x4a0 init/main.c:1140
secondary_startup_64_no_verify+0xc3/0xcb
Allocated by task 13297:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
kmalloc include/linux/slab.h:586 [inline]
tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x272/0x380 security/tomoyo/file.c:771
tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
security_file_open+0x45/0xb0 security/security.c:1651
do_dentry_open+0x358/0x1250 fs/open.c:811
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 5091:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:215 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
slab_free mm/slub.c:3510 [inline]
kfree+0xd6/0x4d0 mm/slub.c:4552
skb_free_head+0xac/0x110 net/core/skbuff.c:655
skb_release_data+0x67a/0x810 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
consume_skb net/core/skbuff.c:915 [inline]
consume_skb+0xc2/0x160 net/core/skbuff.c:909
nsim_dev_trap_report drivers/net/netdevsim/dev.c:815 [inline]
nsim_dev_trap_report_work+0x854/0xba0 drivers/net/netdevsim/dev.c:840
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff88807bcb8000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3648 bytes to the right of
4096-byte region [ffff88807bcb8000, ffff88807bcb9000)
The buggy address belongs to the page:
page:ffffea0001ef2e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bcb8
head:ffffea0001ef2e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888010c42140
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 12678, ts 267790296022, free_ts 267783822869
prep_new_page mm/page_alloc.c:2382 [inline]
get_page_from_freelist+0xba2/0x3df0 mm/page_alloc.c:4123
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5349
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2262
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab+0x26c/0x3c0 mm/slub.c:1944
new_slab mm/slub.c:2004 [inline]
___slab_alloc+0x8df/0xf20 mm/slub.c:3005
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092
slab_alloc_node mm/slub.c:3183 [inline]
slab_alloc mm/slub.c:3225 [inline]
kmem_cache_alloc_trace+0x310/0x3f0 mm/slub.c:3256
kmalloc include/linux/slab.h:581 [inline]
kzalloc include/linux/slab.h:714 [inline]
snmp6_alloc_dev net/ipv6/addrconf.c:353 [inline]
ipv6_add_dev+0x5a9/0x12a0 net/ipv6/addrconf.c:403
addrconf_notify+0x614/0x1ba0 net/ipv6/addrconf.c:3521
notifier_call_chain+0xb5/0x200 kernel/notifier.c:84
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938
call_netdevice_notifiers_extack net/core/dev.c:1976 [inline]
call_netdevice_notifiers net/core/dev.c:1990 [inline]
register_netdevice+0x1102/0x15a0 net/core/dev.c:9984
macvlan_common_newlink+0xe96/0x1760 drivers/net/macvlan.c:1508
macvtap_newlink drivers/net/macvtap.c:109 [inline]
macvtap_newlink+0x190/0x260 drivers/net/macvtap.c:81
__rtnl_newlink+0x107f/0x1760 net/core/rtnetlink.c:3483
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3531
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1348 [inline]
free_pcp_prepare+0x548/0xd10 mm/page_alloc.c:1400
free_unref_page_prepare mm/page_alloc.c:3269 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3364
qlink_free mm/kasan/quarantine.c:157 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:239 [inline]
slab_post_alloc_hook mm/slab.h:749 [inline]
slab_alloc_node mm/slub.c:3217 [inline]
slab_alloc mm/slub.c:3225 [inline]
__kmem_cache_alloc_lru mm/slub.c:3232 [inline]
kmem_cache_alloc_lru+0x31a/0x720 mm/slub.c:3249
__d_alloc+0x32/0x960 fs/dcache.c:1769
d_alloc_anon fs/dcache.c:1868 [inline]
d_alloc_cursor+0x3b/0xd0 fs/dcache.c:1874
dcache_dir_open+0x33/0x90 fs/libfs.c:82
do_dentry_open+0x4b9/0x1250 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff88807bcb9d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807bcb9d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807bcb9e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88807bcb9e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807bcb9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 89 de mov %ebx,%esi
2: e8 dd 8e 14 f8 callq 0xf8148ee4
7: 84 db test %bl,%bl
9: 75 ac jne 0xffffffb7
b: e8 54 8c 14 f8 callq 0xf8148c64
10: e8 4f d2 1a f8 callq 0xf81ad264
15: eb 0c jmp 0x23
17: e8 48 8c 14 f8 callq 0xf8148c64
1c: 0f 00 2d 61 70 cd 00 verw 0xcd7061(%rip) # 0xcd7084
23: e8 3c 8c 14 f8 callq 0xf8148c64
28: fb sti
29: f4 hlt
* 2a: 9c pushfq <-- trapping instruction
2b: 5b pop %rbx
2c: 81 e3 00 02 00 00 and $0x200,%ebx
32: fa cli
33: 31 ff xor %edi,%edi
35: 48 89 de mov %rbx,%rsi
38: e8 17 90 14 f8 callq 0xf8149054
3d: 48 85 db test %rbx,%rbx