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BUG: KASAN: slab-out-of-bounds in tcp_retransmit_timer+0x2d4c/0x3240 net/ipv4/tcp_timer.c:500
Read of size 8 at addr ffff888050a982d0 by task syz-executor.1/16002
CPU: 1 PID: 16002 Comm: syz-executor.1 Not tainted 5.9.0-rc1-syzkaller #0
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+0x18f/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
tcp_retransmit_timer+0x2d4c/0x3240 net/ipv4/tcp_timer.c:500
tcp_write_timer_handler+0x79b/0xa60 net/ipv4/tcp_timer.c:611
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:631
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 d8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 46 16 c0 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 db 8d 59 f9 65 8b 05 d4 d8 0b 78 85 c0 74 02 5d
RSP: 0018:ffffc900064178a0 EFLAGS: 00000286
RAX: 1ffffffff136c77b RBX: ffff888087868200 RCX: 1ffffffff1563f49
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6256f
RBP: ffff8880ae735e00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae735e00
R13: ffff88808dc74240 R14: 0000000000000000 R15: 0000000000000000
finish_lock_switch kernel/sched/core.c:3517 [inline]
finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
context_switch kernel/sched/core.c:3781 [inline]
__schedule+0x8ed/0x21e0 kernel/sched/core.c:4527
schedule+0xd0/0x2a0 kernel/sched/core.c:4602
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue_me+0x2a7/0x570 kernel/futex.c:2588
futex_wait+0x1df/0x560 kernel/futex.c:2690
do_futex+0x15b/0x1a50 kernel/futex.c:3749
__do_sys_futex kernel/futex.c:3810 [inline]
__se_sys_futex kernel/futex.c:3778 [inline]
__x64_sys_futex+0x378/0x4e0 kernel/futex.c:3778
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f25d2d70cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000118cf48 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf48
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffffac09cbf R14: 00007f25d2d719c0 R15: 000000000118cf4c
Allocated by task 15759:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
slab_post_alloc_hook mm/slab.h:518 [inline]
slab_alloc mm/slab.c:3312 [inline]
kmem_cache_alloc+0x138/0x3a0 mm/slab.c:3482
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags+0x9a/0xe0 include/linux/audit.h:320
getname fs/namei.c:209 [inline]
do_renameat2+0x15c/0xbf0 fs/namei.c:4374
__do_sys_rename fs/namei.c:4502 [inline]
__se_sys_rename fs/namei.c:4500 [inline]
__x64_sys_rename+0x5d/0x80 fs/namei.c:4500
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 15759:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
__kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422
__cache_free mm/slab.c:3418 [inline]
kmem_cache_free.part.0+0x67/0x1f0 mm/slab.c:3693
putname+0xe1/0x120 fs/namei.c:259
do_renameat2+0x27c/0xbf0 fs/namei.c:4478
__do_sys_rename fs/namei.c:4502 [inline]
__se_sys_rename fs/namei.c:4500 [inline]
__x64_sys_rename+0x5d/0x80 fs/namei.c:4500
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff888050a98440
which belongs to the cache names_cache of size 4096
The buggy address is located 368 bytes to the left of
4096-byte region [ffff888050a98440, ffff888050a99440)
The buggy address belongs to the page:
page:0000000082dcbc3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x50a98
head:0000000082dcbc3c order:1 compound_mapcount:0
flags: 0xfffe0000010200(slab|head)
raw: 00fffe0000010200 ffffea0002587e08 ffffea0001967e08 ffff88821bc47a00
raw: 0000000000000000 ffff888050a98440 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888050a98180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888050a98200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888050a98280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888050a98300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888050a98380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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