[afs?] [batman?] [wireless?] KASAN: slab-use-after-free Read in pwq_unbound_release_workfn
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syzbot
Apr 1, 2023, 2:12:47 AM4/1/23
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a6faf7ea9fcb Add linux-next specific files for 20230328
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16c199a9c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dd9eb5678a80e926
dashboard link: https://syzkaller.appspot.com/bug?extid=c282f612411c3116dfa0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [a...@unstable.cc b.a.t...@lists.open-mesh.org da...@davemloft.net edum...@google.com joha...@sipsolutions.net ku...@kernel.org linu...@lists.infradead.org linux-...@vger.kernel.org linux-...@vger.kernel.org linux-w...@vger.kernel.org marekl...@neomailbox.ch net...@vger.kernel.org pab...@redhat.com sv...@narfation.org s...@simonwunderlich.de]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b03351a37b6b/disk-a6faf7ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/663c2ddae5f7/vmlinux-a6faf7ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a5e229b4773a/bzImage-a6faf7ea.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c282f6...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
Read of size 8 at addr ffff888045883b60 by task kworker/0:7/5193
CPU: 0 PID: 5193 Comm: kworker/0:7 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events pwq_unbound_release_workfn
Call Trace:
<TASK>
__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
lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
wq_unregister_lockdep kernel/workqueue.c:3615 [inline]
pwq_unbound_release_workfn+0x258/0x340 kernel/workqueue.c:3863
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 5587:
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+0xa2/0xb0 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 include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:680 [inline]
ieee802_11_parse_elems_full+0x106/0x1340 net/mac80211/util.c:1609
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2311 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2318 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline]
ieee80211_ibss_rx_queued_mgmt+0xc20/0x2d50 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1648
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Freed by task 5587:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline]
ieee80211_ibss_rx_queued_mgmt+0x19ea/0x2d50 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1648
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
__call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
pwq_unbound_release_workfn+0x26b/0x340 kernel/workqueue.c:3864
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff888045883800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 864 bytes inside of
freed 1024-byte region [ffff888045883800, ffff888045883c00)
The buggy address belongs to the physical page:
page:ffffea0001162000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45880
head:ffffea0001162000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5114, tgid 5114 (syz-executor.2), ts 154108224291, free_ts 17192889946
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x28e/0x380 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc_node+0x51/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:579 [inline]
kzalloc_node include/linux/slab.h:691 [inline]
qdisc_alloc+0xb0/0xb30 net/sched/sch_generic.c:938
qdisc_create_dflt+0x75/0x3f0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1151 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2509 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1169 [inline]
dev_activate+0x803/0x1380 net/sched/sch_generic.c:1228
__dev_open+0x393/0x4d0 net/core/dev.c:1426
__dev_change_flags+0x587/0x750 net/core/dev.c:8527
dev_change_flags+0x97/0x170 net/core/dev.c:8599
do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836
__rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3626
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+0x4d8/0xb80 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
free_contig_range+0xb5/0x180 mm/page_alloc.c:6963
destroy_args+0x6c4/0x920 mm/debug_vm_pgtable.c:1023
debug_vm_pgtable+0x257b/0x4650 mm/debug_vm_pgtable.c:1403
do_one_initcall+0x102/0x540 init/main.c:1246
do_initcall_level init/main.c:1319 [inline]
do_initcalls init/main.c:1335 [inline]
do_basic_setup init/main.c:1354 [inline]
kernel_init_freeable+0x5a4/0x890 init/main.c:1571
kernel_init+0x1e/0x2c0 init/main.c:1462
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Memory state around the buggy address:
ffff888045883a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888045883a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888045883b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888045883b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888045883c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: a6faf7ea9fcb Add linux-next specific files for 20230328
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16c199a9c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dd9eb5678a80e926
dashboard link: https://syzkaller.appspot.com/bug?extid=c282f612411c3116dfa0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [a...@unstable.cc b.a.t...@lists.open-mesh.org da...@davemloft.net edum...@google.com joha...@sipsolutions.net ku...@kernel.org linu...@lists.infradead.org linux-...@vger.kernel.org linux-...@vger.kernel.org linux-w...@vger.kernel.org marekl...@neomailbox.ch net...@vger.kernel.org pab...@redhat.com sv...@narfation.org s...@simonwunderlich.de]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b03351a37b6b/disk-a6faf7ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/663c2ddae5f7/vmlinux-a6faf7ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a5e229b4773a/bzImage-a6faf7ea.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c282f6...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
Read of size 8 at addr ffff888045883b60 by task kworker/0:7/5193
CPU: 0 PID: 5193 Comm: kworker/0:7 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events pwq_unbound_release_workfn
Call Trace:
<TASK>
__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
lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
wq_unregister_lockdep kernel/workqueue.c:3615 [inline]
pwq_unbound_release_workfn+0x258/0x340 kernel/workqueue.c:3863
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 5587:
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+0xa2/0xb0 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 include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:680 [inline]
ieee802_11_parse_elems_full+0x106/0x1340 net/mac80211/util.c:1609
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2311 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2318 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline]
ieee80211_ibss_rx_queued_mgmt+0xc20/0x2d50 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1648
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Freed by task 5587:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline]
ieee80211_ibss_rx_queued_mgmt+0x19ea/0x2d50 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1648
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
__call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
pwq_unbound_release_workfn+0x26b/0x340 kernel/workqueue.c:3864
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff888045883800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 864 bytes inside of
freed 1024-byte region [ffff888045883800, ffff888045883c00)
The buggy address belongs to the physical page:
page:ffffea0001162000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45880
head:ffffea0001162000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5114, tgid 5114 (syz-executor.2), ts 154108224291, free_ts 17192889946
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x28e/0x380 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc_node+0x51/0x1a0 mm/slab_common.c:973
kmalloc_node include/linux/slab.h:579 [inline]
kzalloc_node include/linux/slab.h:691 [inline]
qdisc_alloc+0xb0/0xb30 net/sched/sch_generic.c:938
qdisc_create_dflt+0x75/0x3f0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1151 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2509 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1169 [inline]
dev_activate+0x803/0x1380 net/sched/sch_generic.c:1228
__dev_open+0x393/0x4d0 net/core/dev.c:1426
__dev_change_flags+0x587/0x750 net/core/dev.c:8527
dev_change_flags+0x97/0x170 net/core/dev.c:8599
do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836
__rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3626
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+0x4d8/0xb80 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
free_contig_range+0xb5/0x180 mm/page_alloc.c:6963
destroy_args+0x6c4/0x920 mm/debug_vm_pgtable.c:1023
debug_vm_pgtable+0x257b/0x4650 mm/debug_vm_pgtable.c:1403
do_one_initcall+0x102/0x540 init/main.c:1246
do_initcall_level init/main.c:1319 [inline]
do_initcalls init/main.c:1335 [inline]
do_basic_setup init/main.c:1354 [inline]
kernel_init_freeable+0x5a4/0x890 init/main.c:1571
kernel_init+0x1e/0x2c0 init/main.c:1462
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Memory state around the buggy address:
ffff888045883a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888045883a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888045883b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888045883b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888045883c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
May 29, 2023, 3:10:57 PM5/29/23
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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