==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:870 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1514 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1749 [inline]
BUG: KASAN: use-after-free in __run_timers+0x521/0xbe0 kernel/time/timer.c:1813
Write of size 8 at addr ffff8881ed99b1c8 by task syz-executor.2/501
CPU: 1 PID: 501 Comm: syz-executor.2 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #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_move_list include/linux/list.h:870 [inline]
__collect_expired_timers kernel/time/timer.c:1514 [inline]
collect_expired_timers kernel/time/timer.c:1749 [inline]
__run_timers+0x521/0xbe0 kernel/time/timer.c:1813
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:orc_find arch/x86/kernel/unwind_orc.c:150 [inline]
RIP: 0010:unwind_next_frame+0x228/0x1ea0 arch/x86/kernel/unwind_orc.c:438
Code: 18 00 00 4d 0f be 26 48 8b 44 24 30 80 3c 18 00 48 8b 5c 24 20 74 08 48 89 df e8 a3 60 64 00 4c 03 23 49 ff cc 4c 89 74 24 50 <4c> 89 bc 24 80 00 00 00 0f 84 f1 00 00 00 48 c7 c0 00 00 00 81 49
RSP: 0018:ffff8881eb796ce0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103d6f2e05 RBX: ffff8881eb797028 RCX: ffffffff84511b00
RDX: ffffc90001b4b000 RSI: 0000000000000010 RDI: ffffffff812fbfcc
RBP: ffff8881eb796fd0 R08: ffffffff8153b472 R09: ffff8881eb797030
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff83d04d80
R13: ffffffff83d04d81 R14: ffff8881eb797015 R15: 1ffff1103d6f2e02
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
save_stack+0x95/0x880 mm/page_owner.c:122
__set_page_owner+0x33/0x1e0 mm/page_owner.c:191
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_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
alloc_skb_with_frags+0x169/0x550 net/core/skbuff.c:5839
sock_alloc_send_pskb+0x831/0x950 net/core/sock.c:2276
unix_stream_sendmsg+0x581/0xe80 net/unix/af_unix.c:1909
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
RIP: 0033:0x7f48701b1f69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f486f52c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f48702e8f80 RCX: 00007f48701b1f69
RDX: 000000000000fdef RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007f487020f6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f48702e8f80 R15: 00007fff9aab4918
Allocated by task 393:
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]
__kmalloc_track_caller+0x100/0x2b0 mm/slub.c:4449
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0xb4/0x4d0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1080 [inline]
ndisc_alloc_skb+0xee/0x2c0 net/ipv6/ndisc.c:421
ndisc_send_ns+0x29d/0x830 net/ipv6/ndisc.c:627
addrconf_dad_work+0xb91/0x16f0 net/ipv6/addrconf.c:4194
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Freed by task 393:
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]
kfree+0x123/0x370 mm/slub.c:4071
skb_release_all net/core/skbuff.c:675 [inline]
__kfree_skb net/core/skbuff.c:689 [inline]
kfree_skb+0xb8/0x3c0 net/core/skbuff.c:708
ip6_mc_input+0x236/0x2a0 net/ipv6/ip6_input.c:550
NF_HOOK include/linux/netfilter.h:303 [inline]
ipv6_rcv+0xee/0x280 net/ipv6/ip6_input.c:278
__netif_receive_skb_one_core net/core/dev.c:4972 [inline]
__netif_receive_skb+0x1c6/0x530 net/core/dev.c:5086
process_backlog+0x34f/0x680 net/core/dev.c:5921
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 ffff8881ed99b000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 456 bytes inside of
512-byte region [ffff8881ed99b000, ffff8881ed99b200)
The buggy address belongs to the page:
page:ffffea0007b66600 refcount:1 mapcount:0 mapping:ffff8881f5c02500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c02500
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__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]
__kmalloc_track_caller+0x16d/0x2b0 mm/slub.c:4449
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0xb4/0x4d0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1080 [inline]
nlmsg_new include/net/netlink.h:888 [inline]
inet6_ifa_notify net/ipv6/addrconf.c:5457 [inline]
__ipv6_ifa_notify+0x2e1/0x1290 net/ipv6/addrconf.c:6066
ipv6_ifa_notify net/ipv6/addrconf.c:6119 [inline]
addrconf_dad_completed+0x181/0xdb0 net/ipv6/addrconf.c:4232
addrconf_dad_work+0xe4d/0x16f0 net/ipv6/addrconf.c:4036
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
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
tun_set_iff+0x870/0xdc0 drivers/net/tun.c:2919
__tun_chr_ioctl+0x8a9/0x1d00 drivers/net/tun.c:3182
do_vfs_ioctl+0x742/0x1720 fs/ioctl.c:47
ksys_ioctl fs/ioctl.c:742 [inline]
__do_sys_ioctl fs/ioctl.c:749 [inline]
__se_sys_ioctl fs/ioctl.c:747 [inline]
__x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881ed99b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881ed99b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881ed99b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881ed99b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881ed99b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1ebd01067 P4D 1ebd01067 PUD 1ebd04067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 501 Comm: syz-executor.2 Tainted: G B 5.4.274-syzkaller-00016-gdd432c37afcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881eba38000
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ed99b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9498
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ed99b1c0
FS: 00007f486f52c6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecdb3000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:orc_find arch/x86/kernel/unwind_orc.c:150 [inline]
RIP: 0010:unwind_next_frame+0x228/0x1ea0 arch/x86/kernel/unwind_orc.c:438
Code: 18 00 00 4d 0f be 26 48 8b 44 24 30 80 3c 18 00 48 8b 5c 24 20 74 08 48 89 df e8 a3 60 64 00 4c 03 23 49 ff cc 4c 89 74 24 50 <4c> 89 bc 24 80 00 00 00 0f 84 f1 00 00 00 48 c7 c0 00 00 00 81 49
RSP: 0018:ffff8881eb796ce0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103d6f2e05 RBX: ffff8881eb797028 RCX: ffffffff84511b00
RDX: ffffc90001b4b000 RSI: 0000000000000010 RDI: ffffffff812fbfcc
RBP: ffff8881eb796fd0 R08: ffffffff8153b472 R09: ffff8881eb797030
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff83d04d80
R13: ffffffff83d04d81 R14: ffff8881eb797015 R15: 1ffff1103d6f2e02
arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
save_stack+0x95/0x880 mm/page_owner.c:122
__set_page_owner+0x33/0x1e0 mm/page_owner.c:191
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_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
alloc_skb_with_frags+0x169/0x550 net/core/skbuff.c:5839
sock_alloc_send_pskb+0x831/0x950 net/core/sock.c:2276
unix_stream_sendmsg+0x581/0xe80 net/unix/af_unix.c:1909
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
RIP: 0033:0x7f48701b1f69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f486f52c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f48702e8f80 RCX: 00007f48701b1f69
RDX: 000000000000fdef RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007f487020f6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f48702e8f80 R15: 00007fff9aab4918
Modules linked in:
CR2: 0000000000000000
---[ end trace 2b297c007d1505df ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881eba38000
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ed99b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9498
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ed99b1c0
FS: 00007f486f52c6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecdb3000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 18 00 sbb %al,(%rax)
2: 00 4d 0f add %cl,0xf(%rbp)
5: be 26 48 8b 44 mov $0x448b4826,%esi
a: 24 30 and $0x30,%al
c: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
10: 48 8b 5c 24 20 mov 0x20(%rsp),%rbx
15: 74 08 je 0x1f
17: 48 89 df mov %rbx,%rdi
1a: e8 a3 60 64 00 call 0x6460c2
1f: 4c 03 23 add (%rbx),%r12
22: 49 ff cc dec %r12
25: 4c 89 74 24 50 mov %r14,0x50(%rsp)
* 2a: 4c 89 bc 24 80 00 00 mov %r15,0x80(%rsp) <-- trapping instruction
31: 00
32: 0f 84 f1 00 00 00 je 0x129
38: 48 c7 c0 00 00 00 81 mov $0xffffffff81000000,%rax
3f: 49 rex.WB