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BUG: KASAN: use-after-free in tcp_orphan_retries net/ipv4/tcp_timer.c:127 [inline]
BUG: KASAN: use-after-free in tcp_probe_timer net/ipv4/tcp_timer.c:362 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler+0x90f/0x930 net/ipv4/tcp_timer.c:591
Read of size 4 at addr ffff88806ec74868 by task syz-executor4/9929

CPU: 1 PID: 9929 Comm: syz-executor4 Not tainted 5.0.0-rc3+ #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134
 tcp_orphan_retries net/ipv4/tcp_timer.c:127 [inline]
 tcp_probe_timer net/ipv4/tcp_timer.c:362 [inline]
 tcp_write_timer_handler+0x90f/0x930 net/ipv4/tcp_timer.c:591
 tcp_write_timer+0x10e/0x1d0 net/ipv4/tcp_timer.c:607
 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694
 __do_softirq+0x30b/0xb11 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:clear_subpage+0xd7/0x110 mm/memory.c:4460
netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'.
Code: 04 3c 03 7e 43 83 ab 30 13 00 00 01 bf 01 00 00 00 e8 bd 34 a3 ff 65 8b 1d b6 fc 4c 7e 31 ff 89 de e8 4d 0f cd ff 85 db 74 0a <e8> c4 0d cd ff 5b 41 5c 5d c3 e8 ba 0d cd ff e8 d4 8a 4b ff e8 b0
RSP: 0000:ffff88808e647918 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000080000000 RCX: ffffffff81b4f123
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff88808e647928 R08: ffff8880620443c0 R09: 0000000000000000
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff8880620443c0
R13: 00000000000000df R14: 0000000000000000 R15: 0000000000000000
 process_huge_page mm/memory.c:4413 [inline]
 clear_huge_page+0xb5/0x4d0 mm/memory.c:4473
 __do_huge_pmd_anonymous_page mm/huge_memory.c:577 [inline]
 do_huge_pmd_anonymous_page+0x82b/0x17f0 mm/huge_memory.c:744
 create_huge_pmd mm/memory.c:3678 [inline]
 __handle_mm_fault+0x385a/0x55a0 mm/memory.c:3882
 handle_mm_fault+0x4ec/0xc80 mm/memory.c:3948
 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline]
 __do_page_fault+0x5da/0xd60 arch/x86/mm/fault.c:1541
 do_page_fault+0xe6/0x7d8 arch/x86/mm/fault.c:1572
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143
RIP: 0033:0x400489
Code: 00 e9 00 02 00 00 48 8b 44 24 10 48 0b 44 24 28 75 1f 48 8b 14 24 48 8b 7c 24 20 be 01 00 00 00 e8 cc 4c 00 00 48 8b 74 24 08 <88> 06 e9 25 02 00 00 48 8b 44 24 08 48 8b 14 24 be 01 00 00 00 0f
RSP: 002b:00007ffcb24294e0 EFLAGS: 00010206
RAX: 00000000000000aa RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 00000000000000aa
RBP: fffffffffffffffe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000053b R15: 0000000000000004

Allocated by task 9274:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc mm/kasan/common.c:496 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
 kasan_kmalloc mm/kasan/common.c:504 [inline]
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411
 kmem_cache_alloc+0x12d/0x710 mm/slab.c:3543
 getname_flags fs/namei.c:140 [inline]
 getname_flags+0xd6/0x5b0 fs/namei.c:129
 getname+0x1a/0x20 fs/namei.c:211
 do_sys_open+0x3a5/0x7c0 fs/open.c:1057
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9274:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
 __cache_free mm/slab.c:3487 [inline]
 kmem_cache_free+0x86/0x260 mm/slab.c:3749
 putname+0xef/0x130 fs/namei.c:261
 do_sys_open+0x3f4/0x7c0 fs/open.c:1072
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88806ec742c0
 which belongs to the cache names_cache of size 4096
The buggy address is located 1448 bytes inside of
 4096-byte region [ffff88806ec742c0, ffff88806ec752c0)
The buggy address belongs to the page:
page:ffffea0001bb1d00 count:1 mapcount:0 mapping:ffff88821bc45380 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0001912408 ffffea00024e1508 ffff88821bc45380
raw: 0000000000000000 ffff88806ec742c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88806ec74700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806ec74780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806ec74800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88806ec74880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806ec74900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
kobject: 'brif' (0000000034420db7): kobject_cleanup, parent 000000004ce40016
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