ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
kobject: kobject_add_internal failed for hci2:201 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
==================================================================
BUG: KASAN: slab-use-after-free in l2cap_conn_ready net/bluetooth/l2cap_core.c:1619 [inline]
BUG: KASAN: slab-use-after-free in l2cap_connect_cfm+0xdbe/0xf80 net/bluetooth/l2cap_core.c:7278
Read of size 8 at addr ffff888149e1d480 by task kworker/u9:1/5149
CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci2 hci_rx_work
Call Trace:
__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:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
l2cap_conn_ready net/bluetooth/l2cap_core.c:1619 [inline]
l2cap_connect_cfm+0xdbe/0xf80 net/bluetooth/l2cap_core.c:7278
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
le_conn_complete_evt+0x1665/0x1d80 net/bluetooth/hci_event.c:5758
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5784
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7132
hci_event_func net/bluetooth/hci_event.c:7440 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7495
hci_rx_work+0x2c6/0x16c0 net/bluetooth/hci_core.c:4031
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 5149:
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:878 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
l2cap_chan_create+0x44/0x920 net/bluetooth/l2cap_core.c:449
l2cap_sock_alloc.constprop.0+0xf3/0x180 net/bluetooth/l2cap_sock.c:1886
l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1468
l2cap_connect_cfm+0x4cc/0xf80 net/bluetooth/l2cap_core.c:7261
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
le_conn_complete_evt+0x1665/0x1d80 net/bluetooth/hci_event.c:5758
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5784
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7132
hci_event_func net/bluetooth/hci_event.c:7440 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7495
hci_rx_work+0x2c6/0x16c0 net/bluetooth/hci_core.c:4031
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 6488:
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 mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4727
l2cap_chan_destroy net/bluetooth/l2cap_core.c:495 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_chan_put+0x216/0x2c0 net/bluetooth/l2cap_core.c:519
l2cap_sock_cleanup_listen+0x4d/0x2a0 net/bluetooth/l2cap_sock.c:1451
l2cap_sock_release+0x5c/0x210 net/bluetooth/l2cap_sock.c:1411
__sock_release+0xb3/0x270 net/socket.c:658
sock_close+0x1c/0x30 net/socket.c:1426
__fput+0x3f9/0xb60 fs/file_table.c:431
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888149e1d000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1152 bytes inside of
freed 2048-byte region [ffff888149e1d000, ffff888149e1d800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x149e18
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 ffff88801b042000 ffffea000510bc00 dead000000000002
raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000
head: 057ff00000000040 ffff88801b042000 ffffea000510bc00 dead000000000002
head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000
head: 057ff00000000003 ffffea0005278601 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 1, tgid 1 (swapper/0), ts 24563356019, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0xf7d/0x2d10 mm/page_alloc.c:3457
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2412 [inline]
allocate_slab mm/slub.c:2578 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2631
___slab_alloc+0xdac/0x1880 mm/slub.c:3818
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
__kmalloc_cache_noprof+0x2b4/0x300 mm/slub.c:4290
kmalloc_noprof include/linux/slab.h:878 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
__media_device_register+0x4c/0x2f0 drivers/media/mc/mc-device.c:720
vivid_create_devnodes drivers/media/test-drivers/vivid/vivid-core.c:1747 [inline]
vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:2040 [inline]
vivid_probe drivers/media/test-drivers/vivid/vivid-core.c:2093 [inline]
vivid_probe+0x8847/0xaea0 drivers/media/test-drivers/vivid/vivid-core.c:2078
platform_probe+0x102/0x1f0 drivers/base/platform.c:1404
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x241/0xa90 drivers/base/dd.c:658
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
__driver_attach+0x283/0x580 drivers/base/dd.c:1216
bus_for_each_dev+0x13f/0x1d0 drivers/base/bus.c:370
page_owner free stack trace missing
Memory state around the buggy address:
ffff888149e1d380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888149e1d400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888149e1d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888149e1d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888149e1d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: wild-memory-access in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: wild-memory-access in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: wild-memory-access in l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
BUG: KASAN: wild-memory-access in l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
BUG: KASAN: wild-memory-access in l2cap_connect_cfm+0x7eb/0xf80 net/bluetooth/l2cap_core.c:7278
Read of size 4 at addr deacfffffffffc8c by task kworker/u9:1/5149
CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Tainted: G B 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci2 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
kasan_report+0xd9/0x110 mm/kasan/report.c:601
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
l2cap_connect_cfm+0x7eb/0xf80 net/bluetooth/l2cap_core.c:7278
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
le_conn_complete_evt+0x1665/0x1d80 net/bluetooth/hci_event.c:5758
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5784
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7132
hci_event_func net/bluetooth/hci_event.c:7440 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7495
hci_rx_work+0x2c6/0x16c0 net/bluetooth/hci_core.c:4031
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
==================================================================
Oops: general protection fault, probably for non-canonical address 0xfbd59bffffffff91: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0xdeacfffffffffc88-0xdeacfffffffffc8f]
CPU: 0 UID: 0 PID: 5149 Comm: kworker/u9:1 Tainted: G B 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci2 hci_rx_work
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
RIP: 0010:l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
RIP: 0010:l2cap_connect_cfm+0x7f2/0xf80 net/bluetooth/l2cap_core.c:7278
Code: 80 fb ff ff 49 39 c5 0f 84 29 01 00 00 e8 26 fd 6e f7 49 8d 6f 0c be 04 00 00 00 48 89 ef e8 f5 b5 cf f7 48 89 e8 48 c1 e8 03 <0f> b6 14 18 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c5
RSP: 0018:ffffc900103c7870 EFLAGS: 00010213
RAX: 1bd59fffffffff91 RBX: dffffc0000000000 RCX: ffffc900196bd000
RDX: 0000000000100000 RSI: ffffffff81ee07be RDI: 0000000000000007
RBP: deacfffffffffc8c R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: ffff88805ad1803b
R13: ffff8880252cb2c0 R14: 0000000000000080 R15: deacfffffffffc80
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdf789c9c CR3: 0000000074fb0000 CR4: 0000000000350ef0
Call Trace:
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
le_conn_complete_evt+0x1665/0x1d80 net/bluetooth/hci_event.c:5758
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5784
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7132
hci_event_func net/bluetooth/hci_event.c:7440 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7495
hci_rx_work+0x2c6/0x16c0 net/bluetooth/hci_core.c:4031
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
RIP: 0010:l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
RIP: 0010:l2cap_connect_cfm+0x7f2/0xf80 net/bluetooth/l2cap_core.c:7278
Code: 80 fb ff ff 49 39 c5 0f 84 29 01 00 00 e8 26 fd 6e f7 49 8d 6f 0c be 04 00 00 00 48 89 ef e8 f5 b5 cf f7 48 89 e8 48 c1 e8 03 <0f> b6 14 18 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c5
RSP: 0018:ffffc900103c7870 EFLAGS: 00010213
RAX: 1bd59fffffffff91 RBX: dffffc0000000000 RCX: ffffc900196bd000
RDX: 0000000000100000 RSI: ffffffff81ee07be RDI: 0000000000000007
RBP: deacfffffffffc8c R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: ffff88805ad1803b
R13: ffff8880252cb2c0 R14: 0000000000000080 R15: deacfffffffffc80
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdf789c9c CR3: 0000000074fb0000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 49 39 c5 cmp %rax,%r13
3: 0f 84 29 01 00 00 je 0x132
9: e8 26 fd 6e f7 call 0xf76efd34
e: 49 8d 6f 0c lea 0xc(%r15),%rbp
12: be 04 00 00 00 mov $0x4,%esi
17: 48 89 ef mov %rbp,%rdi
1a: e8 f5 b5 cf f7 call 0xf7cfb614
1f: 48 89 e8 mov %rbp,%rax
22: 48 c1 e8 03 shr $0x3,%rax
* 26: 0f b6 14 18 movzbl (%rax,%rbx,1),%edx <-- trapping instruction
2a: 48 89 e8 mov %rbp,%rax
2d: 83 e0 07 and $0x7,%eax
30: 83 c0 03 add $0x3,%eax
33: 38 d0 cmp %dl,%al
35: 7c 08 jl 0x3f
37: 84 d2 test %dl,%dl
39: 0f .byte 0xf
3a: 85 c5 test %eax,%ebp