[moderation] [bluetooth?] KASAN: slab-use-after-free Read in skb_dequeue
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syzbot
Jun 6, 2025, 8:10:28 PM6/6/25
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: d00a83477e7a Merge tag 'input-for-v6.16-rc0' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a1e80c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4df26174733e11f3
dashboard link: https://syzkaller.appspot.com/bug?extid=8a25818899ba4e66ede2
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
CC: [johan....@gmail.com linux-b...@vger.kernel.org linux-...@vger.kernel.org luiz....@gmail.com mar...@holtmann.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-d00a8347.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ac727dc51c3/vmlinux-d00a8347.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8981faa6f0a2/bzImage-d00a8347.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a2581...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
Read of size 1 at addr ffff888106250918 by task kworker/u33:6/5952
CPU: 2 UID: 0 PID: 5952 Comm: kworker/u33:6 Not tainted 6.15.0-syzkaller-10954-gd00a83477e7a #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci1 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
__kasan_check_byte+0x36/0x50 mm/kasan/common.c:557
kasan_check_byte include/linux/kasan.h:399 [inline]
lock_acquire kernel/locking/lockdep.c:5845 [inline]
lock_acquire+0xfc/0x350 kernel/locking/lockdep.c:5828
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
skb_dequeue+0x20/0x180 net/core/skbuff.c:3895
hci_conn_tx_dequeue+0xe7/0x1e0 net/bluetooth/hci_conn.c:3024
hci_num_comp_pkts_evt+0x337/0xd10 net/bluetooth/hci_event.c:4441
hci_event_func net/bluetooth/hci_event.c:7511 [inline]
hci_event_packet+0xa10/0x11c0 net/bluetooth/hci_event.c:7565
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4036
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 5298:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
__hci_conn_add+0x130/0x1b70 net/bluetooth/hci_conn.c:939
hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1051
le_conn_complete_evt+0x791/0x1d70 net/bluetooth/hci_event.c:5665
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5817
hci_le_meta_evt+0x354/0x5e0 net/bluetooth/hci_event.c:7200
hci_event_func net/bluetooth/hci_event.c:7508 [inline]
hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7565
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4036
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 7641:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b4/0x4d0 mm/slub.c:4841
device_release+0xa4/0x240 drivers/base/core.c:2568
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e7/0x5a0 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3800
hci_conn_put include/net/bluetooth/hci_core.h:1618 [inline]
hci_disconnect_all_sync.constprop.0+0x10c/0x3c0 net/bluetooth/hci_sync.c:5644
hci_suspend_sync+0x770/0xab0 net/bluetooth/hci_sync.c:6120
hci_suspend_dev+0x308/0x500 net/bluetooth/hci_core.c:2812
hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2392
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
notifier_call_chain_robust kernel/notifier.c:120 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:345 [inline]
blocking_notifier_call_chain_robust+0xc8/0x160 kernel/notifier.c:333
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x189/0x2b0 kernel/power/user.c:77
misc_open+0x35d/0x420 drivers/char/misc.c:179
chrdev_open+0x231/0x6a0 fs/char_dev.c:414
do_dentry_open+0x741/0x1c10 fs/open.c:964
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:3887 [inline]
path_openat+0x1de4/0x2cb0 fs/namei.c:4046
do_filp_open+0x20b/0x470 fs/namei.c:4073
do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888106250000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2328 bytes inside of
freed 8192-byte region [ffff888106250000, ffff888106252000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106250
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801b843180 ffffea0000a63e00 dead000000000002
raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801b843180 ffffea0000a63e00 dead000000000002
head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 057ff00000000003 ffffea0004189401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
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 1, tgid 1 (swapper/0), ts 8313732893, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kmalloc_array_noprof include/linux/slab.h:948 [inline]
fb_show_logo_line drivers/video/fbdev/core/fb_logo.c:313 [inline]
fb_show_logo+0x1133/0x23e0 drivers/video/fbdev/core/fb_logo.c:502
fbcon_switch+0xfc4/0x14c0 drivers/video/fbdev/core/fbcon.c:2201
redraw_screen+0x2c1/0x760 drivers/tty/vt/vt.c:957
con2fb_init_display drivers/video/fbdev/core/fbcon.c:828 [inline]
set_con2fb_map+0x79b/0x1060 drivers/video/fbdev/core/fbcon.c:889
do_fb_registered drivers/video/fbdev/core/fbcon.c:2998 [inline]
fbcon_fb_registered+0x21d/0x6a0 drivers/video/fbdev/core/fbcon.c:3014
do_register_framebuffer+0x470/0x7c0 drivers/video/fbdev/core/fbmem.c:455
register_framebuffer+0x23/0x40 drivers/video/fbdev/core/fbmem.c:521
__drm_fb_helper_initial_config_and_unlock+0xdb7/0x17b0 drivers/gpu/drm/drm_fb_helper.c:1851
page_owner free stack trace missing
Memory state around the buggy address:
ffff888106250800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888106250880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888106250900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888106250980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888106250a00: 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: d00a83477e7a Merge tag 'input-for-v6.16-rc0' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a1e80c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4df26174733e11f3
dashboard link: https://syzkaller.appspot.com/bug?extid=8a25818899ba4e66ede2
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
CC: [johan....@gmail.com linux-b...@vger.kernel.org linux-...@vger.kernel.org luiz....@gmail.com mar...@holtmann.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-d00a8347.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ac727dc51c3/vmlinux-d00a8347.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8981faa6f0a2/bzImage-d00a8347.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a2581...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
Read of size 1 at addr ffff888106250918 by task kworker/u33:6/5952
CPU: 2 UID: 0 PID: 5952 Comm: kworker/u33:6 Not tainted 6.15.0-syzkaller-10954-gd00a83477e7a #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci1 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
__kasan_check_byte+0x36/0x50 mm/kasan/common.c:557
kasan_check_byte include/linux/kasan.h:399 [inline]
lock_acquire kernel/locking/lockdep.c:5845 [inline]
lock_acquire+0xfc/0x350 kernel/locking/lockdep.c:5828
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
skb_dequeue+0x20/0x180 net/core/skbuff.c:3895
hci_conn_tx_dequeue+0xe7/0x1e0 net/bluetooth/hci_conn.c:3024
hci_num_comp_pkts_evt+0x337/0xd10 net/bluetooth/hci_event.c:4441
hci_event_func net/bluetooth/hci_event.c:7511 [inline]
hci_event_packet+0xa10/0x11c0 net/bluetooth/hci_event.c:7565
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4036
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 5298:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
__hci_conn_add+0x130/0x1b70 net/bluetooth/hci_conn.c:939
hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1051
le_conn_complete_evt+0x791/0x1d70 net/bluetooth/hci_event.c:5665
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5817
hci_le_meta_evt+0x354/0x5e0 net/bluetooth/hci_event.c:7200
hci_event_func net/bluetooth/hci_event.c:7508 [inline]
hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7565
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4036
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 7641:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b4/0x4d0 mm/slub.c:4841
device_release+0xa4/0x240 drivers/base/core.c:2568
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e7/0x5a0 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3800
hci_conn_put include/net/bluetooth/hci_core.h:1618 [inline]
hci_disconnect_all_sync.constprop.0+0x10c/0x3c0 net/bluetooth/hci_sync.c:5644
hci_suspend_sync+0x770/0xab0 net/bluetooth/hci_sync.c:6120
hci_suspend_dev+0x308/0x500 net/bluetooth/hci_core.c:2812
hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2392
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
notifier_call_chain_robust kernel/notifier.c:120 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:345 [inline]
blocking_notifier_call_chain_robust+0xc8/0x160 kernel/notifier.c:333
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x189/0x2b0 kernel/power/user.c:77
misc_open+0x35d/0x420 drivers/char/misc.c:179
chrdev_open+0x231/0x6a0 fs/char_dev.c:414
do_dentry_open+0x741/0x1c10 fs/open.c:964
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:3887 [inline]
path_openat+0x1de4/0x2cb0 fs/namei.c:4046
do_filp_open+0x20b/0x470 fs/namei.c:4073
do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888106250000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2328 bytes inside of
freed 8192-byte region [ffff888106250000, ffff888106252000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106250
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801b843180 ffffea0000a63e00 dead000000000002
raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801b843180 ffffea0000a63e00 dead000000000002
head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 057ff00000000003 ffffea0004189401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
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 1, tgid 1 (swapper/0), ts 8313732893, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kmalloc_array_noprof include/linux/slab.h:948 [inline]
fb_show_logo_line drivers/video/fbdev/core/fb_logo.c:313 [inline]
fb_show_logo+0x1133/0x23e0 drivers/video/fbdev/core/fb_logo.c:502
fbcon_switch+0xfc4/0x14c0 drivers/video/fbdev/core/fbcon.c:2201
redraw_screen+0x2c1/0x760 drivers/tty/vt/vt.c:957
con2fb_init_display drivers/video/fbdev/core/fbcon.c:828 [inline]
set_con2fb_map+0x79b/0x1060 drivers/video/fbdev/core/fbcon.c:889
do_fb_registered drivers/video/fbdev/core/fbcon.c:2998 [inline]
fbcon_fb_registered+0x21d/0x6a0 drivers/video/fbdev/core/fbcon.c:3014
do_register_framebuffer+0x470/0x7c0 drivers/video/fbdev/core/fbmem.c:455
register_framebuffer+0x23/0x40 drivers/video/fbdev/core/fbmem.c:521
__drm_fb_helper_initial_config_and_unlock+0xdb7/0x17b0 drivers/gpu/drm/drm_fb_helper.c:1851
page_owner free stack trace missing
Memory state around the buggy address:
ffff888106250800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888106250880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888106250900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888106250980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888106250a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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syzbot
Dec 10, 2025, 9:34:18 AM12/10/25
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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