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+0xd55/0xf10 net/bluetooth/l2cap_core.c:7280
Read of size 8 at addr ffff88805824b480 by task kworker/u9:0/54
CPU: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #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:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
l2cap_conn_ready net/bluetooth/l2cap_core.c:1619 [inline]
l2cap_connect_cfm+0xd55/0xf10 net/bluetooth/l2cap_core.c:7280
hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]
le_conn_complete_evt+0x1690/0x1da0 net/bluetooth/hci_event.c:5763
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7162
hci_event_func net/bluetooth/hci_event.c:7470 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4035
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 54:
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:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
l2cap_chan_create+0x44/0x920 net/bluetooth/l2cap_core.c:449
l2cap_sock_alloc.constprop.0+0xf5/0x1c0 net/bluetooth/l2cap_sock.c:1888
l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1470
l2cap_connect_cfm+0x862/0xf10 net/bluetooth/l2cap_core.c:7263
hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]
le_conn_complete_evt+0x1690/0x1da0 net/bluetooth/hci_event.c:5763
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7162
hci_event_func net/bluetooth/hci_event.c:7470 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4035
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 6240:
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:582
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:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4761
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:1453
l2cap_sock_release+0x5c/0x210 net/bluetooth/l2cap_sock.c:1413
__sock_release+0xb3/0x270 net/socket.c:640
sock_close+0x1c/0x30 net/socket.c:1408
__fput+0x3fb/0xb60 fs/file_table.c:450
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:329 [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 ffff88805824b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1152 bytes inside of
freed 2048-byte region [ffff88805824b000, ffff88805824b800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58248
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: f5(slab)
raw: 00fff00000000040 ffff88801b042000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801b042000 0000000000000000 dead000000000001
head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0001609201 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5838, tgid 5838 (syz-executor), ts 93330003727, free_ts 31276309928
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2589 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2642
___slab_alloc+0xd7d/0x17a0 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_node_track_caller_noprof+0x2f1/0x510 mm/slub.c:4317
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609
pskb_expand_head+0x243/0x1240 net/core/skbuff.c:2275
netlink_trim+0x1ef/0x250 net/netlink/af_netlink.c:1303
netlink_broadcast_filtered+0xc7/0xef0 net/netlink/af_netlink.c:1509
nlmsg_multicast_filtered include/net/netlink.h:1128 [inline]
nlmsg_multicast include/net/netlink.h:1147 [inline]
nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2585
rtnl_notify net/core/rtnetlink.c:943 [inline]
rtmsg_ifinfo_send net/core/rtnetlink.c:4376 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4392 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4379 [inline]
rtmsg_ifinfo+0x174/0x1a0 net/core/rtnetlink.c:4398
__dev_notify_flags+0x24e/0x2e0 net/core/dev.c:8984
rtnl_configure_link+0x1b7/0x260 net/core/rtnetlink.c:3552
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
free_contig_range+0x133/0x3f0 mm/page_alloc.c:6632
destroy_args+0x802/0xa50 mm/debug_vm_pgtable.c:1017
debug_vm_pgtable+0x168e/0x31a0 mm/debug_vm_pgtable.c:1397
do_one_initcall+0x12b/0x700 init/main.c:1266
do_initcall_level init/main.c:1328 [inline]
do_initcalls init/main.c:1344 [inline]
do_basic_setup init/main.c:1363 [inline]
kernel_init_freeable+0x5c7/0x900 init/main.c:1577
kernel_init+0x1c/0x2b0 init/main.c:1466
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Memory state around the buggy address:
ffff88805824b380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805824b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805824b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805824b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805824b580: 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+0x5c1/0xf10 net/bluetooth/l2cap_core.c:7280
Read of size 4 at addr deacfffffffffc8c by task kworker/u9:0/54
CPU: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Tainted: G B 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #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:602
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+0x5c1/0xf10 net/bluetooth/l2cap_core.c:7280
hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]
le_conn_complete_evt+0x1690/0x1da0 net/bluetooth/hci_event.c:5763
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7162
hci_event_func net/bluetooth/hci_event.c:7470 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4035
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: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Tainted: G B 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #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+0x5c8/0xf10 net/bluetooth/l2cap_core.c:7280
Code: 80 fb ff ff 49 39 c7 0f 84 17 01 00 00 e8 50 7e 6b f7 49 8d 6e 0c be 04 00 00 00 48 89 ef e8 9f 58 cd 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 86
RSP: 0018:ffffc90000bf7858 EFLAGS: 00010213
RAX: 1bd59fffffffff91 RBX: dffffc0000000000 RCX: ffffc9001e026000
RDX: 0000000000100000 RSI: ffffffff81fbc50e RDI: 0000000000000007
RBP: deacfffffffffc8c R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: ffff888022bd003d
R13: 0000000000000080 R14: deacfffffffffc80 R15: ffff888029e6aac0
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30300ff8 CR3: 00000000301be000 CR4: 0000000000350ef0
Call Trace:
hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]
le_conn_complete_evt+0x1690/0x1da0 net/bluetooth/hci_event.c:5763
hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5789
hci_le_meta_evt+0x2e5/0x5d0 net/bluetooth/hci_event.c:7162
hci_event_func net/bluetooth/hci_event.c:7470 [inline]
hci_event_packet+0x669/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4035
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+0x5c8/0xf10 net/bluetooth/l2cap_core.c:7280
Code: 80 fb ff ff 49 39 c7 0f 84 17 01 00 00 e8 50 7e 6b f7 49 8d 6e 0c be 04 00 00 00 48 89 ef e8 9f 58 cd 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 86
RSP: 0018:ffffc90000bf7858 EFLAGS: 00010213
RAX: 1bd59fffffffff91 RBX: dffffc0000000000 RCX: ffffc9001e026000
RDX: 0000000000100000 RSI: ffffffff81fbc50e RDI: 0000000000000007
RBP: deacfffffffffc8c R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: ffff888022bd003d
R13: 0000000000000080 R14: deacfffffffffc80 R15: ffff888029e6aac0
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30300ff8 CR3: 000000000df7e000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 49 39 c7 cmp %rax,%r15
3: 0f 84 17 01 00 00 je 0x120
9: e8 50 7e 6b f7 call 0xf76b7e5e
e: 49 8d 6e 0c lea 0xc(%r14),%rbp
12: be 04 00 00 00 mov $0x4,%esi
17: 48 89 ef mov %rbp,%rdi
1a: e8 9f 58 cd f7 call 0xf7cd58be
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 .byte 0x85
3b: 86 .byte 0x86