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Message-ID: <000000000000bdd6c305fb86ef53@google.com>
Date: Fri, 12 May 2023 15:50:49 -0700
From: syzbot <syzbot+04afcb3d2c840447559a@...kaller.appspotmail.com>
To: davem@...emloft.net, edumazet@...gle.com, jhs@...atatu.com,
jiri@...nulli.us, kuba@...nel.org, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, pabeni@...hat.com,
syzkaller-bugs@...glegroups.com, vinicius.gomes@...el.com,
xiyou.wangcong@...il.com
Subject: [syzbot] [net?] KASAN: slab-out-of-bounds Read in taprio_dequeue_from_txq
Hello,
syzbot found the following issue on:
HEAD commit: cc3c44c9fda2 Merge tag 'drm-fixes-2023-05-12' of git://ano..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1207804a280000
kernel config: https://syzkaller.appspot.com/x/.config?x=4340592eb0a0a7c5
dashboard link: https://syzkaller.appspot.com/bug?extid=04afcb3d2c840447559a
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=153c01dc280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d2c24de9e223/disk-cc3c44c9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/53f62666288b/vmlinux-cc3c44c9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5ebe93c20d75/bzImage-cc3c44c9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+04afcb3d2c840447559a@...kaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in taprio_dequeue_from_txq+0x835/0x940 net/sched/sch_taprio.c:714
Read of size 8 at addr ffff88807b55da80 by task syz-executor.5/8955
CPU: 0 PID: 8955 Comm: syz-executor.5 Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
taprio_dequeue_from_txq+0x835/0x940 net/sched/sch_taprio.c:714
taprio_dequeue_tc_priority+0x277/0x450 net/sched/sch_taprio.c:795
taprio_dequeue+0x12c/0x5e0 net/sched/sch_taprio.c:862
dequeue_skb net/sched/sch_generic.c:292 [inline]
qdisc_restart net/sched/sch_generic.c:397 [inline]
__qdisc_run+0x1b2/0x1780 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3868 [inline]
__dev_queue_xmit+0x2215/0x3b10 net/core/dev.c:4210
dev_queue_xmit include/linux/netdevice.h:3085 [inline]
neigh_hh_output include/net/neighbour.h:528 [inline]
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0xfbd/0x1560 net/ipv6/ip6_output.c:134
__ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206
NF_HOOK_COND include/linux/netfilter.h:292 [inline]
ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
dst_output include/net/dst.h:458 [inline]
NF_HOOK include/linux/netfilter.h:303 [inline]
ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508
ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718
addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x3c/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 c6 6f 53 f7 48 89 ef e8 ee dd 53 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> 3f b2 45 f7 65 8b 05 50 24 f2 75 85 c0 74 0a 5b 5d c3 e8 ac 6a
RSP: 0018:ffffc900063a7258 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff22a44de
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff888016b945b8 R08: 0000000000000001 R09: ffffffff9151cd0f
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff92000c74e50
R13: 0000000000000000 R14: ffff88807721f040 R15: ffff88807721f048
spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
ref_tracker_free+0x367/0x820 lib/ref_tracker.c:151
netdev_tracker_free include/linux/netdevice.h:4090 [inline]
netdev_put include/linux/netdevice.h:4107 [inline]
netdev_put include/linux/netdevice.h:4103 [inline]
qdisc_destroy+0x163/0x450 net/sched/sch_generic.c:1066
qdisc_put+0xd1/0xf0 net/sched/sch_generic.c:1082
taprio_destroy+0x2e6/0x710 net/sched/sch_taprio.c:2033
qdisc_create+0xa33/0x1040 net/sched/sch_api.c:1331
tc_modify_qdisc+0x488/0x1aa0 net/sched/sch_api.c:1682
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
____sys_sendmsg+0x71c/0x900 net/socket.c:2503
___sys_sendmsg+0x110/0x1b0 net/socket.c:2557
__sys_sendmsg+0xf7/0x1c0 net/socket.c:2586
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fbfb208c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfb2e55168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfb21abf80 RCX: 00007fbfb208c169
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000008
RBP: 00007fbfb20e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffde123676f R14: 00007fbfb2e55300 R15: 0000000000022000
</TASK>
Allocated by task 8955:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc+0x5e/0x190 mm/slab_common.c:979
kmalloc_array include/linux/slab.h:596 [inline]
kcalloc include/linux/slab.h:627 [inline]
taprio_init+0x319/0x940 net/sched/sch_taprio.c:2086
qdisc_create+0x4d1/0x1040 net/sched/sch_api.c:1297
tc_modify_qdisc+0x488/0x1aa0 net/sched/sch_api.c:1682
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:747
____sys_sendmsg+0x71c/0x900 net/socket.c:2503
___sys_sendmsg+0x110/0x1b0 net/socket.c:2557
__sys_sendmsg+0xf7/0x1c0 net/socket.c:2586
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3332
kernfs_unlink_open_file+0x3a4/0x4a0 fs/kernfs/file.c:633
kernfs_fop_release+0xeb/0x1e0 fs/kernfs/file.c:805
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Second to last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3332
kernfs_unlink_open_file+0x3a4/0x4a0 fs/kernfs/file.c:633
kernfs_fop_release+0xeb/0x1e0 fs/kernfs/file.c:805
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88807b55da00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes to the right of
allocated 128-byte region [ffff88807b55da00, ffff88807b55da80)
The buggy address belongs to the physical page:
page:ffffea0001ed5740 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b55d
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0x10()
raw: 00fff00000000200 ffff888012440400 ffffea0001dccb10 ffffea0000844350
raw: 0000000000000000 ffff88807b55d000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 5023, tgid 5023 (udevd), ts 303630964026, free_ts 303272122010
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731
prep_new_page mm/page_alloc.c:1738 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1360 [inline]
cache_grow_begin+0x9b/0x3b0 mm/slab.c:2569
cache_alloc_refill+0x27f/0x380 mm/slab.c:2942
____cache_alloc mm/slab.c:3018 [inline]
____cache_alloc mm/slab.c:3001 [inline]
__do_cache_alloc mm/slab.c:3201 [inline]
slab_alloc_node mm/slab.c:3249 [inline]
__kmem_cache_alloc_node+0x360/0x3f0 mm/slab.c:3540
kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057
kmalloc include/linux/slab.h:559 [inline]
kzalloc include/linux/slab.h:680 [inline]
kernfs_get_open_node fs/kernfs/file.c:572 [inline]
kernfs_fop_open+0xaea/0xe70 fs/kernfs/file.c:740
do_dentry_open+0x6cc/0x13f0 fs/open.c:920
do_open fs/namei.c:3636 [inline]
path_openat+0x1baa/0x2750 fs/namei.c:3791
do_filp_open+0x1ba/0x410 fs/namei.c:3818
do_sys_openat2+0x16d/0x4c0 fs/open.c:1356
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1383
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564
free_unref_page+0x33/0x370 mm/page_alloc.c:2659
slab_destroy mm/slab.c:1612 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1632
cache_flusharray mm/slab.c:3360 [inline]
___cache_free+0x2ae/0x3d0 mm/slab.c:3423
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slab.c:3256 [inline]
slab_alloc mm/slab.c:3265 [inline]
__kmem_cache_alloc_lru mm/slab.c:3442 [inline]
kmem_cache_alloc+0x1bd/0x3f0 mm/slab.c:3451
getname_flags.part.0+0x50/0x4f0 fs/namei.c:140
getname_flags+0x9e/0xe0 include/linux/audit.h:321
vfs_fstatat+0x77/0xb0 fs/stat.c:275
__do_sys_newfstatat+0x8a/0x110 fs/stat.c:446
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88807b55d980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807b55da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88807b55da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88807b55db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88807b55db80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 24 10 and $0x10,%al
2: e8 c6 6f 53 f7 callq 0xf7536fcd
7: 48 89 ef mov %rbp,%rdi
a: e8 ee dd 53 f7 callq 0xf753ddfd
f: 81 e3 00 02 00 00 and $0x200,%ebx
15: 75 25 jne 0x3c
17: 9c pushfq
18: 58 pop %rax
19: f6 c4 02 test $0x2,%ah
1c: 75 2d jne 0x4b
1e: 48 85 db test %rbx,%rbx
21: 74 01 je 0x24
23: fb sti
24: bf 01 00 00 00 mov $0x1,%edi
* 29: e8 3f b2 45 f7 callq 0xf745b26d <-- trapping instruction
2e: 65 8b 05 50 24 f2 75 mov %gs:0x75f22450(%rip),%eax # 0x75f22485
35: 85 c0 test %eax,%eax
37: 74 0a je 0x43
39: 5b pop %rbx
3a: 5d pop %rbp
3b: c3 retq
3c: e8 .byte 0xe8
3d: ac lods %ds:(%rsi),%al
3e: 6a .byte 0x6a
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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