Bluetooth: hci0: hardware error 0xff
=========================
WARNING: held lock freed!
6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0 Not tainted
-------------------------
kworker/u5:2/3615 is freeing memory ffff88801783c000-ffff88801783c7ff, with a lock still held there!
ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_chan_lock include/net/bluetooth/l2cap.h:855 [inline]
ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 net/bluetooth/l2cap_core.c:1920
7 locks held by kworker/u5:2/3615:
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88814b1ae938 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000394fda8 ((work_completion)(&hdev->error_reset)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88814b130fd0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x25/0x70 net/bluetooth/hci_core.c:552
#3: ffff88814b130078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x268/0x1130 net/bluetooth/hci_sync.c:4463
#4: ffffffff8d9d3e28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1776 [inline]
#4: ffffffff8d9d3e28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xd5/0x260 net/bluetooth/hci_conn.c:2366
#5: ffff88807281e2d8 (&conn->chan_lock){+.+.}-{3:3}, at: l2cap_conn_del+0x2ef/0x7b0 net/bluetooth/l2cap_core.c:1915
#6: ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_chan_lock include/net/bluetooth/l2cap.h:855 [inline]
#6: ffff88801783c520 (&chan->lock/1){+.+.}-{3:3}, at: l2cap_conn_del+0x3b5/0x7b0 net/bluetooth/l2cap_core.c:1920
stack backtrace:
CPU: 1 PID: 3615 Comm: kworker/u5:2 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: hci0 hci_error_reset
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_freed_lock_bug kernel/locking/lockdep.c:6422 [inline]
debug_check_no_locks_freed.cold+0x9d/0xa9 kernel/locking/lockdep.c:6455
slab_free_hook mm/slub.c:1731 [inline]
slab_free_freelist_hook+0x73/0x1c0 mm/slub.c:1785
slab_free mm/slub.c:3539 [inline]
kfree+0xe2/0x580 mm/slub.c:4567
l2cap_chan_destroy net/bluetooth/l2cap_core.c:503 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_chan_put+0x22a/0x2d0 net/bluetooth/l2cap_core.c:527
l2cap_conn_del+0x3fc/0x7b0 net/bluetooth/l2cap_core.c:1924
l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8212 [inline]
l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8205
hci_disconn_cfm include/net/bluetooth/hci_core.h:1779 [inline]
hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2366
hci_dev_close_sync+0x55d/0x1130 net/bluetooth/hci_sync.c:4476
hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554
hci_error_reset+0x96/0x130 net/bluetooth/hci_core.c:1050
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline]
BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0xa6/0x5e0 kernel/locking/mutex.c:916
Read of size 8 at addr ffff88801783c4b8 by task kworker/u5:2/3615
CPU: 1 PID: 3615 Comm: kworker/u5:2 Not tainted 6.0.0-rc6-syzkaller-00281-g1707c39ae309 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: hci0 hci_error_reset
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:71 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline]
__mutex_unlock_slowpath+0xa6/0x5e0 kernel/locking/mutex.c:916
l2cap_chan_unlock include/net/bluetooth/l2cap.h:860 [inline]
l2cap_conn_del+0x404/0x7b0 net/bluetooth/l2cap_core.c:1926
l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8212 [inline]
l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8205
hci_disconn_cfm include/net/bluetooth/hci_core.h:1779 [inline]
hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2366
hci_dev_close_sync+0x55d/0x1130 net/bluetooth/hci_sync.c:4476
hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554
hci_error_reset+0x96/0x130 net/bluetooth/hci_core.c:1050
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Allocated by task 3615:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:437 [inline]
____kasan_kmalloc mm/kasan/common.c:516 [inline]
____kasan_kmalloc mm/kasan/common.c:475 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:733 [inline]
l2cap_chan_create+0x40/0x570 net/bluetooth/l2cap_core.c:463
a2mp_chan_open net/bluetooth/a2mp.c:771 [inline]
amp_mgr_create+0x8f/0x960 net/bluetooth/a2mp.c:862
a2mp_channel_create+0x7d/0x150 net/bluetooth/a2mp.c:894
l2cap_data_channel net/bluetooth/l2cap_core.c:7569 [inline]
l2cap_recv_frame+0x48e3/0x8d90 net/bluetooth/l2cap_core.c:7724
l2cap_recv_acldata+0xaa6/0xc00 net/bluetooth/l2cap_core.c:8429
hci_acldata_packet net/bluetooth/hci_core.c:3777 [inline]
hci_rx_work+0x705/0x1230 net/bluetooth/hci_core.c:4012
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Freed by task 3615:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:367 [inline]
____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1759 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
slab_free mm/slub.c:3539 [inline]
kfree+0xe2/0x580 mm/slub.c:4567
l2cap_chan_destroy net/bluetooth/l2cap_core.c:503 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_chan_put+0x22a/0x2d0 net/bluetooth/l2cap_core.c:527
l2cap_conn_del+0x3fc/0x7b0 net/bluetooth/l2cap_core.c:1924
l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8212 [inline]
l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8205
hci_disconn_cfm include/net/bluetooth/hci_core.h:1779 [inline]
hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2366
hci_dev_close_sync+0x55d/0x1130 net/bluetooth/hci_sync.c:4476
hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554
hci_error_reset+0x96/0x130 net/bluetooth/hci_core.c:1050
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
The buggy address belongs to the object at ffff88801783c000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1208 bytes inside of
2048-byte region [ffff88801783c000, ffff88801783c800)
The buggy address belongs to the physical page:
page:ffffea00005e0e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17838
head:ffffea00005e0e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea00005e3600 dead000000000002 ffff888011842000
raw: 0000000000000000 0000000080080008 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 1, tgid 1 (swapper/0), ts 1569597260, free_ts 0
prep_new_page mm/page_alloc.c:2532 [inline]
get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1c7/0x510 mm/page_alloc.c:5515
alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2103
alloc_pages+0x22f/0x270 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:1829 [inline]
allocate_slab+0x27e/0x3d0 mm/slub.c:1974
new_slab mm/slub.c:2034 [inline]
___slab_alloc+0x7f1/0xe10 mm/slub.c:3036
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
slab_alloc_node mm/slub.c:3214 [inline]
slab_alloc mm/slub.c:3256 [inline]
kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:733 [inline]
device_create_groups_vargs+0x8a/0x280 drivers/base/core.c:4176
device_create+0xdf/0x120 drivers/base/core.c:4236
fb_console_init+0x56/0x276 drivers/video/fbdev/core/fbcon.c:3389
fbmem_init+0x105/0x126 drivers/video/fbdev/core/fbmem.c:1951
do_one_initcall+0xfe/0x650 init/main.c:1296
do_initcall_level init/main.c:1369 [inline]
do_initcalls init/main.c:1385 [inline]
do_basic_setup init/main.c:1404 [inline]
kernel_init_freeable+0x6b1/0x73a init/main.c:1623
kernel_init+0x1a/0x1d0 init/main.c:1512
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
page_owner free stack trace missing
Memory state around the buggy address:
ffff88801783c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801783c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801783c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801783c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801783c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================