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BUG: KASAN: use-after-free in tcp_probe_timer net/ipv4/tcp_timer.c:360 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler+0x8c6/0x8d0 net/ipv4/tcp_timer.c:596
Read of size 4 at addr ffff888087480690 by task ps/25206
CPU: 1 PID: 25206 Comm: ps Not tainted 5.2.0+ #97
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
print_address_description.cold+0xd4/0x306 mm/kasan/report.c:351
__kasan_report.cold+0x1b/0x36 mm/kasan/report.c:482
kasan_report+0x12/0x17 mm/kasan/common.c:612
__asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131
tcp_probe_timer net/ipv4/tcp_timer.c:360 [inline]
tcp_write_timer_handler+0x8c6/0x8d0 net/ipv4/tcp_timer.c:596
tcp_write_timer+0xa8/0x1e0 net/ipv4/tcp_timer.c:612
call_timer_fn+0x1ac/0x780 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+0x697/0x17a0 kernel/time/timer.c:1698
__do_softirq+0x262/0x98c kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x19b/0x1e0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:537 [inline]
smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1095
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828
RIP: 0010:format_decode+0x6ed/0xbc0 lib/vsprintf.c:2320
Code: 3d fa 41 80 4c 24 04 01 e9 4d fd ff ff e8 bb bd 3d fa 4d 89 fd 41 c6 04 24 03 49 83 c5 01 44 2b ad 70 ff ff ff e9 6d fb ff ff 9e bd 3d fa 4d 89 fd 41 c6 04 24 04 49 83 c5 01 44 2b ad 70 ff
RSP: 0018:ffff8880933ef398 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13
RAX: 000000000000001b RBX: 0000000000000000 RCX: ffffffff8734c442
RDX: 0000000000000073 RSI: 0000000000000078 RDI: 0000000000000001
RBP: ffff8880933ef448 R08: ffff8880912d8480 R09: ffffed101267deb3
R10: ffffed101267deb2 R11: 0000000000000000 R12: ffff8880933ef4c8
R13: 0000000000000073 R14: ffff8880933ef420 R15: ffffffff87bf9946
vsnprintf+0x17e/0x19a0 lib/vsprintf.c:2455
tomoyo_supervisor+0x10f/0xef0 security/tomoyo/common.c:2067
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x263/0x360 security/tomoyo/file.c:573
tomoyo_check_open_permission+0x3ab/0x3f0 security/tomoyo/file.c:777
tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
tomoyo_file_open+0xa9/0xd0 security/tomoyo/tomoyo.c:314
security_file_open+0x71/0x300 security/security.c:1457
do_dentry_open+0x373/0x1250 fs/open.c:765
vfs_open+0xa0/0xd0 fs/open.c:887
do_last fs/namei.c:3416 [inline]
path_openat+0x10e9/0x4630 fs/namei.c:3533
do_filp_open+0x1a1/0x280 fs/namei.c:3563
do_sys_open+0x3fe/0x5d0 fs/open.c:1070
__do_sys_open fs/open.c:1088 [inline]
__se_sys_open fs/open.c:1083 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1083
do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0ff79a3120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffc564d8eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f0ff79a3120
RDX: 00007ffc564d8ef2 RSI: 0000000000000000 RDI: 00007ffc564d8ee0
RBP: 0000000000020000 R08: 0000000000000000 R09: 00007f0ff7c6b55f
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000cc7220
R13: 0000000000000020 R14: 00007f0ff8058010 R15: 0000000000000000
Allocated by task 25206:
save_stack+0x23/0x90 mm/kasan/common.c:69
set_track mm/kasan/common.c:77 [inline]
__kasan_kmalloc mm/kasan/common.c:487 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:460
kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:495
slab_post_alloc_hook mm/slab.h:520 [inline]
slab_alloc mm/slab.c:3319 [inline]
kmem_cache_alloc+0x121/0x710 mm/slab.c:3483
getname_flags fs/namei.c:138 [inline]
getname_flags+0xd6/0x5b0 fs/namei.c:128
getname+0x1a/0x20 fs/namei.c:209
do_sys_open+0x2c9/0x5d0 fs/open.c:1064
__do_sys_open fs/open.c:1088 [inline]
__se_sys_open fs/open.c:1083 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1083
do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 25206:
save_stack+0x23/0x90 mm/kasan/common.c:69
set_track mm/kasan/common.c:77 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:449
kasan_slab_free+0xe/0x10 mm/kasan/common.c:457
__cache_free mm/slab.c:3425 [inline]
kmem_cache_free+0x86/0x320 mm/slab.c:3693
putname+0xef/0x130 fs/namei.c:259
do_sys_open+0x318/0x5d0 fs/open.c:1079
__do_sys_open fs/open.c:1088 [inline]
__se_sys_open fs/open.c:1083 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1083
do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888087480480
which belongs to the cache names_cache of size 4096
The buggy address is located 528 bytes inside of
4096-byte region [ffff888087480480, ffff888087481480)
The buggy address belongs to the page:
page:ffffea00021d2000 refcount:1 mapcount:0 mapping:ffff88821bc46380 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002a04e88 ffffea000255ee88 ffff88821bc46380
raw: 0000000000000000 ffff888087480480 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888087480580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888087480600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888087480680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888087480700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888087480780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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