[v5.15] KASAN: use-after-free Read in rose_timer_expiry
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syzbot
May 2, 2025, 11:02:29 AM5/2/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 16fdf2c7111b Linux 5.15.181
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15488b68580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1748ac0065c72647
dashboard link: https://syzkaller.appspot.com/bug?extid=3373ecf7f0857d6eb397
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d8540163643f/disk-16fdf2c7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1a4c570bb8bc/vmlinux-16fdf2c7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d4ed683eba5e/bzImage-16fdf2c7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3373ec...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88805f72a82a by task ksoftirqd/0/14
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
print_address_description+0x60/0x2d0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0xdf/0x130 mm/kasan/report.c:451
rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:558
run_ksoftirqd+0x98/0xf0 kernel/softirq.c:925
smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 6642:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x22c/0x750 net/core/skbuff.c:427
__netdev_alloc_skb+0x103/0x4a0 net/core/skbuff.c:494
netdev_alloc_skb include/linux/skbuff.h:3001 [inline]
dev_alloc_skb include/linux/skbuff.h:3014 [inline]
__ieee80211_beacon_get+0xa73/0x1f80 net/mac80211/tx.c:5080
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5194
ieee80211_beacon_get include/net/mac80211.h:4981 [inline]
mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1690 [inline]
__hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
Freed by task 6642:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xef/0x2a0 mm/slub.c:4559
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x6fe/0x850 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
consume_skb+0xa2/0x100 net/core/skbuff.c:914
mac80211_hwsim_beacon_tx+0x4f3/0x920 drivers/net/wireless/mac80211_hwsim.c:1842
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1690 [inline]
__hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
Last potentially related work creation:
kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
insert_work+0x54/0x3d0 kernel/workqueue.c:1366
__queue_work+0x9c5/0xd50 kernel/workqueue.c:1532
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1491 [inline]
__run_timers+0x550/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
The buggy address belongs to the object at ffff88805f72a800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff88805f72a800, ffff88805f72aa00)
The buggy address belongs to the page:
page:ffffea00017dca00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5f728
head:ffffea00017dca00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888016841c80
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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4178, ts 66736542370, free_ts 66699872056
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
__alloc_pages+0x1e1/0x470 mm/page_alloc.c:5466
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xc0/0x4b0 mm/slub.c:1975
___slab_alloc+0x81e/0xdf0 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
__kmalloc_node_track_caller+0x1fc/0x3a0 mm/slub.c:4958
kmalloc_reserve net/core/skbuff.c:356 [inline]
pskb_expand_head+0x127/0x10f0 net/core/skbuff.c:1709
netlink_trim+0x180/0x220 net/netlink/af_netlink.c:1293
netlink_broadcast_filtered+0x7c/0x1170 net/netlink/af_netlink.c:1498
netlink_broadcast net/netlink/af_netlink.c:1543 [inline]
nlmsg_multicast include/net/netlink.h:1033 [inline]
nlmsg_notify+0xec/0x1a0 net/netlink/af_netlink.c:2532
fib_table_insert+0xeac/0x1de0 net/ipv4/fib_trie.c:1398
fib_magic+0x2c1/0x390 net/ipv4/fib_frontend.c:1092
fib_add_ifaddr+0x140/0x5e0 net/ipv4/fib_frontend.c:1114
fib_inetaddr_event+0x13c/0x1c0 net/ipv4/fib_frontend.c:1428
notifier_call_chain kernel/notifier.c:83 [inline]
blocking_notifier_call_chain+0x103/0x1b0 kernel/notifier.c:318
__inet_insert_ifa+0x9e9/0xbc0 net/ipv4/devinet.c:568
inet_rtm_newaddr+0x940/0x1800 net/ipv4/devinet.c:967
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x94/0x280 mm/page_alloc.c:3396
stack_depot_save+0x418/0x440 lib/stackdepot.c:335
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0xb3/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3233
__d_alloc+0x2a/0x6f0 fs/dcache.c:1749
d_alloc fs/dcache.c:1828 [inline]
d_alloc_parallel+0x7e/0x12d0 fs/dcache.c:2582
__lookup_slow+0x113/0x3d0 fs/namei.c:1648
lookup_one_len+0x18e/0x2c0 fs/namei.c:2718
start_creating+0x184/0x310 fs/debugfs/inode.c:354
debugfs_create_dir+0x24/0x4b0 fs/debugfs/inode.c:559
debugfs_hw_add+0x71/0x420 net/mac80211/debugfs.c:655
ieee80211_register_hw+0x29d1/0x39d0 net/mac80211/main.c:1312
mac80211_hwsim_new_radio+0x20d3/0x4080 drivers/net/wireless/mac80211_hwsim.c:3374
hwsim_new_radio_nl+0xa6f/0xc40 drivers/net/wireless/mac80211_hwsim.c:3950
Memory state around the buggy address:
ffff88805f72a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88805f72a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805f72a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805f72a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f72a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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.
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syzbot found the following issue on:
HEAD commit: 16fdf2c7111b Linux 5.15.181
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15488b68580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1748ac0065c72647
dashboard link: https://syzkaller.appspot.com/bug?extid=3373ecf7f0857d6eb397
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d8540163643f/disk-16fdf2c7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1a4c570bb8bc/vmlinux-16fdf2c7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d4ed683eba5e/bzImage-16fdf2c7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3373ec...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88805f72a82a by task ksoftirqd/0/14
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
print_address_description+0x60/0x2d0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0xdf/0x130 mm/kasan/report.c:451
rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:558
run_ksoftirqd+0x98/0xf0 kernel/softirq.c:925
smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 6642:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x22c/0x750 net/core/skbuff.c:427
__netdev_alloc_skb+0x103/0x4a0 net/core/skbuff.c:494
netdev_alloc_skb include/linux/skbuff.h:3001 [inline]
dev_alloc_skb include/linux/skbuff.h:3014 [inline]
__ieee80211_beacon_get+0xa73/0x1f80 net/mac80211/tx.c:5080
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5194
ieee80211_beacon_get include/net/mac80211.h:4981 [inline]
mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1690 [inline]
__hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
Freed by task 6642:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xef/0x2a0 mm/slub.c:4559
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x6fe/0x850 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
consume_skb+0xa2/0x100 net/core/skbuff.c:914
mac80211_hwsim_beacon_tx+0x4f3/0x920 drivers/net/wireless/mac80211_hwsim.c:1842
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1690 [inline]
__hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
Last potentially related work creation:
kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
insert_work+0x54/0x3d0 kernel/workqueue.c:1366
__queue_work+0x9c5/0xd50 kernel/workqueue.c:1532
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1491 [inline]
__run_timers+0x550/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
The buggy address belongs to the object at ffff88805f72a800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff88805f72a800, ffff88805f72aa00)
The buggy address belongs to the page:
page:ffffea00017dca00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5f728
head:ffffea00017dca00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888016841c80
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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4178, ts 66736542370, free_ts 66699872056
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
__alloc_pages+0x1e1/0x470 mm/page_alloc.c:5466
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xc0/0x4b0 mm/slub.c:1975
___slab_alloc+0x81e/0xdf0 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
__kmalloc_node_track_caller+0x1fc/0x3a0 mm/slub.c:4958
kmalloc_reserve net/core/skbuff.c:356 [inline]
pskb_expand_head+0x127/0x10f0 net/core/skbuff.c:1709
netlink_trim+0x180/0x220 net/netlink/af_netlink.c:1293
netlink_broadcast_filtered+0x7c/0x1170 net/netlink/af_netlink.c:1498
netlink_broadcast net/netlink/af_netlink.c:1543 [inline]
nlmsg_multicast include/net/netlink.h:1033 [inline]
nlmsg_notify+0xec/0x1a0 net/netlink/af_netlink.c:2532
fib_table_insert+0xeac/0x1de0 net/ipv4/fib_trie.c:1398
fib_magic+0x2c1/0x390 net/ipv4/fib_frontend.c:1092
fib_add_ifaddr+0x140/0x5e0 net/ipv4/fib_frontend.c:1114
fib_inetaddr_event+0x13c/0x1c0 net/ipv4/fib_frontend.c:1428
notifier_call_chain kernel/notifier.c:83 [inline]
blocking_notifier_call_chain+0x103/0x1b0 kernel/notifier.c:318
__inet_insert_ifa+0x9e9/0xbc0 net/ipv4/devinet.c:568
inet_rtm_newaddr+0x940/0x1800 net/ipv4/devinet.c:967
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x94/0x280 mm/page_alloc.c:3396
stack_depot_save+0x418/0x440 lib/stackdepot.c:335
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0xb3/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3233
__d_alloc+0x2a/0x6f0 fs/dcache.c:1749
d_alloc fs/dcache.c:1828 [inline]
d_alloc_parallel+0x7e/0x12d0 fs/dcache.c:2582
__lookup_slow+0x113/0x3d0 fs/namei.c:1648
lookup_one_len+0x18e/0x2c0 fs/namei.c:2718
start_creating+0x184/0x310 fs/debugfs/inode.c:354
debugfs_create_dir+0x24/0x4b0 fs/debugfs/inode.c:559
debugfs_hw_add+0x71/0x420 net/mac80211/debugfs.c:655
ieee80211_register_hw+0x29d1/0x39d0 net/mac80211/main.c:1312
mac80211_hwsim_new_radio+0x20d3/0x4080 drivers/net/wireless/mac80211_hwsim.c:3374
hwsim_new_radio_nl+0xa6f/0xc40 drivers/net/wireless/mac80211_hwsim.c:3950
Memory state around the buggy address:
ffff88805f72a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88805f72a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805f72a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805f72a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805f72a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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.
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If the report is already addressed, let syzbot know by replying with:
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syzbot
May 3, 2025, 8:30:30 AM5/3/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: b6736e03756f Linux 6.1.136
syzbot found the following issue on:
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15c320f4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=3347648c6893b9d6
dashboard link: https://syzkaller.appspot.com/bug?extid=a78d28bdf669a2548ff7
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
vmlinux: https://storage.googleapis.com/syzbot-assets/82a979dd6615/vmlinux-b6736e03.xz
kernel image: https://storage.googleapis.com/syzbot-assets/419776c748ae/Image-b6736e03.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x404/0x45c net/rose/rose_timer.c:183
Read of size 2 at addr ffff0000f247cc2a by task udevadm/9461
CPU: 1 PID: 9461 Comm: udevadm Not tainted 6.1.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack+0x30/0x40 lib/dump_stack.c:88
dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
print_address_description+0x88/0x220 mm/kasan/report.c:316
print_report+0x50/0x68 mm/kasan/report.c:427
kasan_report+0xa8/0x100 mm/kasan/report.c:531
__asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349
rose_timer_expiry+0x404/0x45c net/rose/rose_timer.c:183
call_timer_fn+0x1b8/0x964 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x460/0x6bc kernel/time/timer.c:1820
run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833
handle_softirqs+0x318/0xc6c kernel/softirq.c:578
__do_softirq+0x14/0x20 kernel/softirq.c:612
____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893
do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
invoke_softirq kernel/softirq.c:459 [inline]
__irq_exit_rcu+0x23c/0x43c kernel/softirq.c:661
irq_exit_rcu+0x14/0x84 kernel/softirq.c:673
__el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486
el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:5003
finish_task_switch+0x120/0x620 kernel/sched/core.c:5121
context_switch kernel/sched/core.c:5247 [inline]
__schedule+0xdd8/0x1b2c kernel/sched/core.c:6561
schedule+0xc4/0x170 kernel/sched/core.c:6637
do_notify_resume+0x13c/0x2b0c arch/arm64/kernel/signal.c:1120
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Allocated by task 6119:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:936 [inline]
__kmalloc_node_track_caller+0xe0/0x16c mm/slab_common.c:956
kmalloc_reserve net/core/skbuff.c:446 [inline]
__alloc_skb+0x264/0x718 net/core/skbuff.c:515
__netdev_alloc_skb+0xb8/0x3c4 net/core/skbuff.c:579
netdev_alloc_skb include/linux/skbuff.h:3206 [inline]
dev_alloc_skb include/linux/skbuff.h:3219 [inline]
__ieee80211_beacon_get+0x71c/0x19cc net/mac80211/tx.c:5260
ieee80211_beacon_get_tim+0x68/0x444 net/mac80211/tx.c:5342
ieee80211_beacon_get include/net/mac80211.h:5262 [inline]
mac80211_hwsim_beacon_tx+0x1e8/0x914 drivers/net/wireless/mac80211_hwsim.c:2086
__iterate_interfaces+0x204/0x484 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd4/0x180 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xc8/0x1b8 drivers/net/wireless/mac80211_hwsim.c:2142
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x44c/0xc64 kernel/time/hrtimer.c:1755
hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1772
handle_softirqs+0x318/0xc6c kernel/softirq.c:578
__do_softirq+0x14/0x20 kernel/softirq.c:612
Freed by task 6119:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
kasan_save_free_info+0x3c/0x60 mm/kasan/generic.c:516
____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:236
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x16c/0x1ec mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0xc0/0x224 mm/slub.c:3674
kfree+0xd0/0x1ac mm/slab_common.c:988
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x43c/0x648 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
consume_skb+0xa0/0x104 net/core/skbuff.c:1035
mac80211_hwsim_tx_frame+0x1c8/0x1f4 drivers/net/wireless/mac80211_hwsim.c:2054
mac80211_hwsim_beacon_tx+0x4c8/0x914 drivers/net/wireless/mac80211_hwsim.c:2116
__iterate_interfaces+0x204/0x484 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd4/0x180 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xc8/0x1b8 drivers/net/wireless/mac80211_hwsim.c:2142
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x44c/0xc64 kernel/time/hrtimer.c:1755
hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1772
handle_softirqs+0x318/0xc6c kernel/softirq.c:578
__do_softirq+0x14/0x20 kernel/softirq.c:612
The buggy address belongs to the object at ffff0000f247cc00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff0000f247cc00, ffff0000f247ce00)
The buggy address is located 42 bytes inside of
The buggy address belongs to the physical page:
page:0000000012eab8d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13247c
head:0000000012eab8d0 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc0003cac800 dead000000000002 ffff0000c0002600
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000f247cb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000f247cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f247cc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000f247cc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000f247cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
syzbot
Nov 13, 2025, 4:51:21 AM11/13/25
to syzkaller...@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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