==================================================================
BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:814 [inline]
BUG: KASAN: use-after-free in enqueue_timer+0xb7/0x300 kernel/time/timer.c:541
Write of size 8 at addr ffff8881ecf2b1c8 by task syz-executor/355
CPU: 0 PID: 355 Comm: syz-executor Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
hlist_add_head include/linux/list.h:814 [inline]
enqueue_timer+0xb7/0x300 kernel/time/timer.c:541
__internal_add_timer kernel/time/timer.c:554 [inline]
internal_add_timer+0x240/0x430 kernel/time/timer.c:604
__mod_timer+0x6f1/0x13e0 kernel/time/timer.c:1065
call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x879/0xbe0 kernel/time/timer.c:1817
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:sk_prot_alloc+0x18d/0x3e0 net/core/sock.c:1630
Code: 1f 44 00 00 e8 34 09 ed fd 48 81 c5 68 01 00 00 48 89 e8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 ef e8 27 ee 1c fe 48 8b 7d 00 2e de e2 fd 84 c0 74 2c e8 05 09 ed fd 49 8d 6e 78 48 89 e8 48
RSP: 0018:ffff8881dcedfcd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff0c7ada1 RBX: 0000000000000000 RCX: ffff8881e03abf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff863d6d08 R08: ffffffff837732d7 R09: ffffffff846031dc
R10: ffffffff84800000 R11: dffffc0000000000 R12: 0000000000000dc0
R13: dffffc0000000000 R14: ffff8881e02d1d40 R15: ffff8881f51d4500
sk_alloc+0x35/0x2f0 net/core/sock.c:1680
inet_create+0x659/0xdf0 net/ipv4/af_inet.c:321
__sock_create+0x3cb/0x7a0 net/socket.c:1427
sock_create net/socket.c:1478 [inline]
__sys_socket+0x132/0x370 net/socket.c:1520
__do_sys_socket net/socket.c:1529 [inline]
__se_sys_socket net/socket.c:1527 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1527
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f33055b4b57
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4e071398 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f330570b2e0 RCX: 00007f33055b4b57
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffd4e071acc R08: 000000000000000a R09: 00007ffd4e0717c7
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032
R13: 00000000000124fe R14: 0000000000000000 R15: 00007ffd4e071b30
Allocated by task 342:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
__alloc_skb+0x7a/0x4d0 net/core/skbuff.c:198
alloc_skb_fclone include/linux/skbuff.h:1130 [inline]
sk_stream_alloc_skb+0x1f4/0xa70 net/ipv4/tcp.c:891
tcp_sendmsg_locked+0xe07/0x3810 net/ipv4/tcp.c:1300
tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1450
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
sock_write_iter+0x344/0x470 net/socket.c:1009
call_write_iter include/linux/fs.h:1989 [inline]
new_sync_write fs/read_write.c:483 [inline]
__vfs_write+0x5d3/0x750 fs/read_write.c:496
vfs_write+0x206/0x4e0 fs/read_write.c:558
ksys_write+0x199/0x2c0 fs/read_write.c:611
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 3050:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1494 [inline]
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:3096
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3206 [inline]
tcp_ack+0x206c/0x6090 net/ipv4/tcp_input.c:3757
tcp_rcv_established+0xd16/0x1a80 net/ipv4/tcp_input.c:5715
tcp_v4_do_rcv+0x3a9/0x770 net/ipv4/tcp_ipv4.c:1589
tcp_v4_rcv+0x219a/0x26f0 net/ipv4/tcp_ipv4.c:1971
ip_protocol_deliver_rcu+0x2e0/0x630 net/ipv4/ip_input.c:204
ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
NF_HOOK include/linux/netfilter.h:303 [inline]
ip_local_deliver+0x2c6/0x5a0 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:444 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:541 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:579 [inline]
ip_sublist_rcv+0xc02/0xc80 net/ipv4/ip_input.c:587
ip_list_rcv+0x477/0x4c0 net/ipv4/ip_input.c:621
__netif_receive_skb_list_ptype net/core/dev.c:5015 [inline]
__netif_receive_skb_list_core+0x6dd/0x8f0 net/core/dev.c:5063
__netif_receive_skb_list net/core/dev.c:5115 [inline]
netif_receive_skb_list_internal+0x944/0xc90 net/core/dev.c:5210
gro_normal_list net/core/dev.c:5321 [inline]
napi_complete_done+0x20a/0x580 net/core/dev.c:6052
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0xb61/0x1250 drivers/net/virtio_net.c:1516
napi_poll net/core/dev.c:6367 [inline]
net_rx_action+0x53f/0x1160 net/core/dev.c:6435
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881ecf2b180
which belongs to the cache skbuff_fclone_cache of size 488
The buggy address is located 72 bytes inside of
488-byte region [ffff8881ecf2b180, ffff8881ecf2b368)
The buggy address belongs to the page:
page:ffffea0007b3ca80 refcount:1 mapcount:0 mapping:ffff8881f1ccc500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f1ccc500
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
alloc_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x109/0x250 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
__alloc_skb+0x7a/0x4d0 net/core/skbuff.c:198
alloc_skb_fclone include/linux/skbuff.h:1130 [inline]
sk_stream_alloc_skb+0x1f4/0xa70 net/ipv4/tcp.c:891
tso_fragment net/ipv4/tcp_output.c:1904 [inline]
tcp_write_xmit+0x1122/0x5cd0 net/ipv4/tcp_output.c:2464
__tcp_push_pending_frames+0x91/0x2e0 net/ipv4/tcp_output.c:2660
tcp_sendmsg_locked+0x2fff/0x3810 net/ipv4/tcp.c:1420
tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1450
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
sock_write_iter+0x344/0x470 net/socket.c:1009
call_write_iter include/linux/fs.h:1989 [inline]
new_sync_write fs/read_write.c:483 [inline]
__vfs_write+0x5d3/0x750 fs/read_write.c:496
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4955 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4961
device_release+0x6b/0x190 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:716 [inline]
kobject_release lib/kobject.c:747 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e6/0x2f0 lib/kobject.c:764
netdev_run_todo+0xc44/0xdf0 net/core/dev.c:9469
tun_detach drivers/net/tun.c:766 [inline]
tun_chr_close+0xc1/0x130 drivers/net/tun.c:3558
__fput+0x262/0x680 fs/file_table.c:281
task_work_run+0x140/0x170 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xcaf/0x2bc0 kernel/exit.c:859
do_group_exit+0x138/0x300 kernel/exit.c:982
get_signal+0xdb1/0x1440 kernel/signal.c:2735
do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881ecf2b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
ffff8881ecf2b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881ecf2b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881ecf2b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881ecf2b280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 83 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 52 4e 3f 00 4d 89 65 00 eb 05 e8 b7
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010006
RAX: 0000081028000fd1 RBX: 1ffff1103d9e5639 RCX: dffffc0000000000
RDX: 0000000000000102 RSI: 0000000000000008 RDI: ffff8881ecf2b1c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20
R13: 0000408140007e88 R14: 1ffff1103d9e5638 R15: ffff8881ecf2b1c8
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555555c04a8 CR3: 00000001e02ef000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: 90 90 90 90 90 90 90 90 90 90 90 e8 9b 73 e0 fd bf 01 00 00 00 89 c6 e8 4f ba d7 fc 0f 1f 44 00 00 0f 00 2d d3 c6 53 00 fb f4 7c 73 e0 fd bf ff ff ff ff 89 c6 e9 30 ba d7 fc 41 57 41 56 53
RSP: 0018:ffffffff85e07d18 EFLAGS: 000002d2 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff85e1ad00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffffff85e07e20 R08: ffffffff82316ca1 R09: fffffbfff0bc35a1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff864b6be8
R13: ffffffff85e1ad00 R14: 1ffffffff0bc35a0 R15: 0000000000000000
default_idle_call kernel/sched/idle.c:94 [inline]
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x248/0x660 kernel/sched/idle.c:264
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:356
start_kernel+0x6d9/0x81d init/main.c:1036
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
---[ end trace 6325bb78723e4665 ]---
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 83 4e 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 52 4e 3f 00 4d 89 65 00 eb 05 e8 b7
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010006
RAX: 0000081028000fd1 RBX: 1ffff1103d9e5639 RCX: dffffc0000000000
RDX: 0000000000000102 RSI: 0000000000000008 RDI: ffff8881ecf2b1c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20
R13: 0000408140007e88 R14: 1ffff1103d9e5638 R15: ffff8881ecf2b1c8
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555555c04a8 CR3: 00000001e02ef000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 44 00 00 add %r8b,(%rax)
3: e8 34 09 ed fd call 0xfded093c
8: 48 81 c5 68 01 00 00 add $0x168,%rbp
f: 48 89 e8 mov %rbp,%rax
12: 48 c1 e8 03 shr $0x3,%rax
16: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
1b: 74 08 je 0x25
1d: 48 89 ef mov %rbp,%rdi
20: e8 27 ee 1c fe call 0xfe1cee4c
25: 48 8b 7d 00 mov 0x0(%rbp),%rdi
* 29: e8 2e de e2 fd call 0xfde2de5c <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 2c je 0x5e
32: e8 05 09 ed fd call 0xfded093c
37: 49 8d 6e 78 lea 0x78(%r14),%rbp
3b: 48 89 e8 mov %rbp,%rax
3e: 48 rex.W