[moderation] [bluetooth?] KASAN: slab-use-after-free Read in l2cap_connect (2)
0 views
Skip to first unread message
syzbot
Jun 24, 2024, 11:26:23 AM (5 days ago) Jun 24
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 5f583a3162ff Merge tag 'rust-fixes-6.10' of https://github..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11170741980000
kernel config: https://syzkaller.appspot.com/x/.config?x=f413acf5b1eb4093
dashboard link: https://syzkaller.appspot.com/bug?extid=d251f9a3891ea55742af
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: https://storage.googleapis.com/syzbot-assets/f530c7950839/disk-5f583a31.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b4f810bbc13e/vmlinux-5f583a31.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a49ec6dadbad/bzImage-5f583a31.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d251f9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
Read of size 8 at addr ffff88802af53000 by task kworker/u9:4/5114
CPU: 1 PID: 5114 Comm: kworker/u9:4 Not tainted 6.10.0-rc4-syzkaller-00301-g5f583a3162ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: hci1 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline]
l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline]
l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline]
l2cap_recv_frame+0xf07/0x8e50 net/bluetooth/l2cap_core.c:6821
l2cap_recv_acldata+0x9ac/0xb60 net/bluetooth/l2cap_core.c:7510
hci_acldata_packet net/bluetooth/hci_core.c:3842 [inline]
hci_rx_work+0xaa7/0x1610 net/bluetooth/hci_core.c:4079
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 4480:
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:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc_noprof include/linux/slab.h:660 [inline]
kzalloc_noprof include/linux/slab.h:778 [inline]
l2cap_conn_add.part.0+0x60/0xa60 net/bluetooth/l2cap_core.c:6864
l2cap_conn_add net/bluetooth/l2cap_core.c:69 [inline]
l2cap_connect_cfm+0x428/0xf80 net/bluetooth/l2cap_core.c:7241
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721
hci_event_func net/bluetooth/hci_event.c:7417 [inline]
hci_event_packet+0x9e3/0x1170 net/bluetooth/hci_event.c:7469
hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 5112:
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:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2196 [inline]
slab_free mm/slub.c:4437 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4558
l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline]
l2cap_conn_del+0x59d/0x740 net/bluetooth/l2cap_core.c:1802
l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7237
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1257
hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5450
abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2909
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:310
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
insert_work+0x36/0x230 kernel/workqueue.c:2207
__queue_work+0x944/0x1020 kernel/workqueue.c:2359
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1838 [inline]
__run_timers+0x567/0xaf0 kernel/time/timer.c:2417
__run_timer_base kernel/time/timer.c:2428 [inline]
__run_timer_base kernel/time/timer.c:2421 [inline]
run_timer_base+0x111/0x190 kernel/time/timer.c:2437
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
insert_work+0x36/0x230 kernel/workqueue.c:2207
__queue_work+0x525/0x1020 kernel/workqueue.c:2363
queue_work_on+0x11a/0x140 kernel/workqueue.c:2410
queue_work include/linux/workqueue.h:621 [inline]
l2cap_conn_ready net/bluetooth/l2cap_core.c:1640 [inline]
l2cap_connect_cfm+0x9c9/0xf80 net/bluetooth/l2cap_core.c:7282
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721
hci_event_func net/bluetooth/hci_event.c:7417 [inline]
hci_event_packet+0x9e3/0x1170 net/bluetooth/hci_event.c:7469
hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88802af53000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes inside of
freed 1024-byte region [ffff88802af53000, ffff88802af53400)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2af50
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015441dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015441dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea0000abd401 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 4752, tgid 4752 (dhcpcd), ts 66098690934, free_ts 66038999175
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x56/0x110 mm/slub.c:2265
allocate_slab mm/slub.c:2428 [inline]
new_slab+0x84/0x260 mm/slub.c:2481
___slab_alloc+0xdac/0x1870 mm/slub.c:3667
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
__slab_alloc_node mm/slub.c:3810 [inline]
slab_alloc_node mm/slub.c:3989 [inline]
__do_kmalloc_node mm/slub.c:4121 [inline]
kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4142
kmemdup_noprof+0x29/0x60 mm/util.c:131
kmemdup_noprof include/linux/fortify-string.h:757 [inline]
bpf_migrate_filter+0xc6/0x390 net/core/filter.c:1268
bpf_prepare_filter+0x183/0x380 net/core/filter.c:1354
bpf_prog_create_from_user+0x1e4/0x2d0 net/core/filter.c:1448
seccomp_prepare_filter kernel/seccomp.c:680 [inline]
seccomp_prepare_user_filter kernel/seccomp.c:717 [inline]
seccomp_set_mode_filter kernel/seccomp.c:1935 [inline]
do_seccomp+0x7b6/0x2580 kernel/seccomp.c:2055
prctl_set_seccomp+0x4b/0x70 kernel/seccomp.c:2108
__do_sys_prctl+0xc83/0x1e40 kernel/sys.c:2539
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
page last free pid 4747 tgid 4747 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583
__put_partials+0x14c/0x170 mm/slub.c:2995
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3941 [inline]
slab_alloc_node mm/slub.c:4001 [inline]
kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4020
shmem_alloc_inode+0x25/0x50 mm/shmem.c:4468
alloc_inode+0x5d/0x230 fs/inode.c:261
new_inode_pseudo fs/inode.c:1007 [inline]
new_inode+0x22/0x270 fs/inode.c:1033
__shmem_get_inode mm/shmem.c:2503 [inline]
shmem_get_inode+0x194/0xe80 mm/shmem.c:2574
shmem_mknod+0x66/0x240 mm/shmem.c:3268
shmem_mkdir+0x31/0x60 mm/shmem.c:3329
vfs_mkdir+0x57d/0x860 fs/namei.c:4131
do_mkdirat+0x301/0x3a0 fs/namei.c:4154
__do_sys_mkdir fs/namei.c:4174 [inline]
__se_sys_mkdir fs/namei.c:4172 [inline]
__x64_sys_mkdir+0xf1/0x140 fs/namei.c:4172
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
Memory state around the buggy address:
ffff88802af52f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88802af52f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802af53000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802af53080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802af53100: 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.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 5f583a3162ff Merge tag 'rust-fixes-6.10' of https://github..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11170741980000
kernel config: https://syzkaller.appspot.com/x/.config?x=f413acf5b1eb4093
dashboard link: https://syzkaller.appspot.com/bug?extid=d251f9a3891ea55742af
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: https://storage.googleapis.com/syzbot-assets/f530c7950839/disk-5f583a31.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b4f810bbc13e/vmlinux-5f583a31.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a49ec6dadbad/bzImage-5f583a31.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d251f9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
Read of size 8 at addr ffff88802af53000 by task kworker/u9:4/5114
CPU: 1 PID: 5114 Comm: kworker/u9:4 Not tainted 6.10.0-rc4-syzkaller-00301-g5f583a3162ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: hci1 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949
l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline]
l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline]
l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline]
l2cap_recv_frame+0xf07/0x8e50 net/bluetooth/l2cap_core.c:6821
l2cap_recv_acldata+0x9ac/0xb60 net/bluetooth/l2cap_core.c:7510
hci_acldata_packet net/bluetooth/hci_core.c:3842 [inline]
hci_rx_work+0xaa7/0x1610 net/bluetooth/hci_core.c:4079
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 4480:
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:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc_noprof include/linux/slab.h:660 [inline]
kzalloc_noprof include/linux/slab.h:778 [inline]
l2cap_conn_add.part.0+0x60/0xa60 net/bluetooth/l2cap_core.c:6864
l2cap_conn_add net/bluetooth/l2cap_core.c:69 [inline]
l2cap_connect_cfm+0x428/0xf80 net/bluetooth/l2cap_core.c:7241
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721
hci_event_func net/bluetooth/hci_event.c:7417 [inline]
hci_event_packet+0x9e3/0x1170 net/bluetooth/hci_event.c:7469
hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 5112:
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:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2196 [inline]
slab_free mm/slub.c:4437 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4558
l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline]
l2cap_conn_del+0x59d/0x740 net/bluetooth/l2cap_core.c:1802
l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7237
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1257
hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5450
abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2909
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:310
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
insert_work+0x36/0x230 kernel/workqueue.c:2207
__queue_work+0x944/0x1020 kernel/workqueue.c:2359
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1838 [inline]
__run_timers+0x567/0xaf0 kernel/time/timer.c:2417
__run_timer_base kernel/time/timer.c:2428 [inline]
__run_timer_base kernel/time/timer.c:2421 [inline]
run_timer_base+0x111/0x190 kernel/time/timer.c:2437
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Second to last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
insert_work+0x36/0x230 kernel/workqueue.c:2207
__queue_work+0x525/0x1020 kernel/workqueue.c:2363
queue_work_on+0x11a/0x140 kernel/workqueue.c:2410
queue_work include/linux/workqueue.h:621 [inline]
l2cap_conn_ready net/bluetooth/l2cap_core.c:1640 [inline]
l2cap_connect_cfm+0x9c9/0xf80 net/bluetooth/l2cap_core.c:7282
hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline]
hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721
hci_event_func net/bluetooth/hci_event.c:7417 [inline]
hci_event_packet+0x9e3/0x1170 net/bluetooth/hci_event.c:7469
hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4074
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88802af53000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes inside of
freed 1024-byte region [ffff88802af53000, ffff88802af53400)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2af50
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015441dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015441dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea0000abd401 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 4752, tgid 4752 (dhcpcd), ts 66098690934, free_ts 66038999175
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x56/0x110 mm/slub.c:2265
allocate_slab mm/slub.c:2428 [inline]
new_slab+0x84/0x260 mm/slub.c:2481
___slab_alloc+0xdac/0x1870 mm/slub.c:3667
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
__slab_alloc_node mm/slub.c:3810 [inline]
slab_alloc_node mm/slub.c:3989 [inline]
__do_kmalloc_node mm/slub.c:4121 [inline]
kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4142
kmemdup_noprof+0x29/0x60 mm/util.c:131
kmemdup_noprof include/linux/fortify-string.h:757 [inline]
bpf_migrate_filter+0xc6/0x390 net/core/filter.c:1268
bpf_prepare_filter+0x183/0x380 net/core/filter.c:1354
bpf_prog_create_from_user+0x1e4/0x2d0 net/core/filter.c:1448
seccomp_prepare_filter kernel/seccomp.c:680 [inline]
seccomp_prepare_user_filter kernel/seccomp.c:717 [inline]
seccomp_set_mode_filter kernel/seccomp.c:1935 [inline]
do_seccomp+0x7b6/0x2580 kernel/seccomp.c:2055
prctl_set_seccomp+0x4b/0x70 kernel/seccomp.c:2108
__do_sys_prctl+0xc83/0x1e40 kernel/sys.c:2539
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
page last free pid 4747 tgid 4747 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583
__put_partials+0x14c/0x170 mm/slub.c:2995
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3941 [inline]
slab_alloc_node mm/slub.c:4001 [inline]
kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4020
shmem_alloc_inode+0x25/0x50 mm/shmem.c:4468
alloc_inode+0x5d/0x230 fs/inode.c:261
new_inode_pseudo fs/inode.c:1007 [inline]
new_inode+0x22/0x270 fs/inode.c:1033
__shmem_get_inode mm/shmem.c:2503 [inline]
shmem_get_inode+0x194/0xe80 mm/shmem.c:2574
shmem_mknod+0x66/0x240 mm/shmem.c:3268
shmem_mkdir+0x31/0x60 mm/shmem.c:3329
vfs_mkdir+0x57d/0x860 fs/namei.c:4131
do_mkdirat+0x301/0x3a0 fs/namei.c:4154
__do_sys_mkdir fs/namei.c:4174 [inline]
__se_sys_mkdir fs/namei.c:4172 [inline]
__x64_sys_mkdir+0xf1/0x140 fs/namei.c:4172
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
Memory state around the buggy address:
ffff88802af52f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88802af52f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802af53000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802af53080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802af53100: 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.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Aleksandr Nogikh
Jun 24, 2024, 4:22:57 PM (5 days ago) Jun 24
to syzbot, syzkaller-upst...@googlegroups.com
#syz upstream
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-m...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-upstream-moderation/000000000000402dcb061ba46749%40google.com.
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-m...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-upstream-moderation/000000000000402dcb061ba46749%40google.com.
Reply all
Reply to author
Forward
0 new messages