* [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
@ 2024-09-01 8:24 syzbot
2024-11-28 8:52 ` syzbot
0 siblings, 1 reply; 6+ messages in thread
From: syzbot @ 2024-09-01 8:24 UTC (permalink / raw)
To: johan.hedberg, linux-bluetooth, linux-kernel, luiz.dentz, marcel,
netdev, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: fe1910f9337b tcp_bpf: fix return value of tcp_bpf_sendmsg()
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=171d6f7b980000
kernel config: https://syzkaller.appspot.com/x/.config?x=996585887acdadb3
dashboard link: https://syzkaller.appspot.com/bug?extid=cc0cc52e7f43dc9e6df1
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cb37d16e2860/disk-fe1910f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/315198aa296e/vmlinux-fe1910f9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b3e6fb9fa8a4/bzImage-fe1910f9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
list_del corruption, ffff88802943da00->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:58!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 7763 Comm: syz.0.694 Not tainted 6.11.0-rc5-syzkaller-00151-gfe1910f9337b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56
Code: e8 71 64 fc 06 90 0f 0b 48 c7 c7 c0 90 60 8c 4c 89 fe e8 5f 64 fc 06 90 0f 0b 48 c7 c7 20 91 60 8c 4c 89 fe e8 4d 64 fc 06 90 <0f> 0b 48 c7 c7 80 91 60 8c 4c 89 fe e8 3b 64 fc 06 90 0f 0b 48 c7
RSP: 0018:ffffc9000492fb58 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 5f038e50b22bff00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8174013c R09: 1ffff92000925f0c
R10: dffffc0000000000 R11: fffff52000925f0d R12: dffffc0000000000
R13: dffffc0000000000 R14: dead000000000100 R15: ffff88802943da00
FS: 00007fb7679de6c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc967a2fc0 CR3: 00000000437dc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del include/linux/list.h:229 [inline]
mgmt_pending_remove+0x26/0x1a0 net/bluetooth/mgmt_util.c:314
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
mgmt_index_removed+0xe6/0x340 net/bluetooth/mgmt.c:9395
hci_sock_bind+0xcce/0x1150 net/bluetooth/hci_sock.c:1307
__sys_bind_socket net/socket.c:1833 [inline]
__sys_bind+0x23d/0x2f0 net/socket.c:1857
__do_sys_bind net/socket.c:1865 [inline]
__se_sys_bind net/socket.c:1863 [inline]
__x64_sys_bind+0x7a/0x90 net/socket.c:1863
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb767f79eb9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb7679de038 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007fb768116058 RCX: 00007fb767f79eb9
RDX: 0000000000000006 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007fb767fe793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb768116058 R15: 00007fffd1ff2828
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56
Code: e8 71 64 fc 06 90 0f 0b 48 c7 c7 c0 90 60 8c 4c 89 fe e8 5f 64 fc 06 90 0f 0b 48 c7 c7 20 91 60 8c 4c 89 fe e8 4d 64 fc 06 90 <0f> 0b 48 c7 c7 80 91 60 8c 4c 89 fe e8 3b 64 fc 06 90 0f 0b 48 c7
RSP: 0018:ffffc9000492fb58 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 5f038e50b22bff00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8174013c R09: 1ffff92000925f0c
R10: dffffc0000000000 R11: fffff52000925f0d R12: dffffc0000000000
R13: dffffc0000000000 R14: dead000000000100 R15: ffff88802943da00
FS: 00007fb7679de6c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f773e8e8178 CR3: 00000000437dc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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 syzkaller@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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
2024-09-01 8:24 syzbot
@ 2024-11-28 8:52 ` syzbot
2024-11-28 11:11 ` Hillf Danton
0 siblings, 1 reply; 6+ messages in thread
From: syzbot @ 2024-11-28 8:52 UTC (permalink / raw)
To: johan.hedberg, linux-bluetooth, linux-kernel, luiz.dentz, marcel,
netdev, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 5dfd7d940094 Merge branch 'bnxt_en-bug-fixes'
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=15a68f78580000
kernel config: https://syzkaller.appspot.com/x/.config?x=83e9a7f9e94ea674
dashboard link: https://syzkaller.appspot.com/bug?extid=cc0cc52e7f43dc9e6df1
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=144ef530580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c5ef5f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f4aa5ee37bd1/disk-5dfd7d94.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d403277896b8/vmlinux-5dfd7d94.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8ac17fc5f4ae/bzImage-5dfd7d94.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x2f/0x140 lib/list_debug.c:49
Read of size 8 at addr ffff8881436c1888 by task kworker/u9:2/5853
CPU: 1 UID: 0 PID: 5853 Comm: kworker/u9:2 Not tainted 6.12.0-syzkaller-05517-g5dfd7d940094 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci0 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__list_del_entry_valid_or_report+0x2f/0x140 lib/list_debug.c:49
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del include/linux/list.h:229 [inline]
mgmt_pending_remove+0x26/0x1a0 net/bluetooth/mgmt_util.c:314
mgmt_remove_adv_monitor_complete+0x2bf/0x550 net/bluetooth/mgmt.c:5522
hci_cmd_sync_work+0x280/0x400 net/bluetooth/hci_sync.c:334
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 6082:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:879 [inline]
kzalloc_noprof include/linux/slab.h:1015 [inline]
mgmt_pending_new+0x65/0x250 net/bluetooth/mgmt_util.c:269
mgmt_pending_add+0x36/0x120 net/bluetooth/mgmt_util.c:296
remove_adv_monitor+0x102/0x1b0 net/bluetooth/mgmt.c:5557
hci_mgmt_cmd+0xc47/0x11d0 net/bluetooth/hci_sock.c:1712
hci_sock_sendmsg+0x7b8/0x11c0 net/bluetooth/hci_sock.c:1832
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:726
sock_write_iter+0x2d7/0x3f0 net/socket.c:1147
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xaeb/0xd30 fs/read_write.c:679
ksys_write+0x18f/0x2b0 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 6085:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 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+0x1a0/0x440 mm/slub.c:4727
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
mgmt_index_removed+0x133/0x390 net/bluetooth/mgmt.c:9467
hci_sock_bind+0xcce/0x1150 net/bluetooth/hci_sock.c:1307
__sys_bind_socket net/socket.c:1827 [inline]
__sys_bind+0x1e4/0x290 net/socket.c:1858
__do_sys_bind net/socket.c:1863 [inline]
__se_sys_bind net/socket.c:1861 [inline]
__x64_sys_bind+0x7a/0x90 net/socket.c:1861
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8881436c1880
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 8 bytes inside of
freed 96-byte region [ffff8881436c1880, ffff8881436c18e0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1436c1
flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000000 ffff88801b041280 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080200020 00000001f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 3012747150, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0x3649/0x3790 mm/page_alloc.c:3474
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x140 mm/slub.c:2412
allocate_slab+0x5a/0x2f0 mm/slub.c:2578
new_slab mm/slub.c:2631 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
__slab_alloc+0x58/0xa0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
__kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4290
kmalloc_noprof include/linux/slab.h:879 [inline]
kzalloc_noprof include/linux/slab.h:1015 [inline]
acpi_ut_evaluate_object+0x108/0x4a0 drivers/acpi/acpica/uteval.c:50
acpi_ut_execute_HID+0xbf/0x3f0 drivers/acpi/acpica/utids.c:45
acpi_get_object_info+0x328/0x1220 drivers/acpi/acpica/nsxfname.c:288
acpi_set_pnp_ids drivers/acpi/scan.c:1410 [inline]
acpi_init_device_object+0xbeb/0x31a0 drivers/acpi/scan.c:1829
acpi_add_single_object+0x106/0x1e00 drivers/acpi/scan.c:1880
acpi_bus_check_add+0x32b/0x980 drivers/acpi/scan.c:2181
acpi_ns_walk_namespace+0x294/0x4f0
page_owner free stack trace missing
Memory state around the buggy address:
ffff8881436c1780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8881436c1800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8881436c1880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff8881436c1900: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8881436c1980: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
2024-11-28 8:52 ` syzbot
@ 2024-11-28 11:11 ` Hillf Danton
0 siblings, 0 replies; 6+ messages in thread
From: Hillf Danton @ 2024-11-28 11:11 UTC (permalink / raw)
To: syzbot; +Cc: linux-kernel, syzkaller-bugs
On Thu, 28 Nov 2024 00:52:26 -0800
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 5dfd7d940094 Merge branch 'bnxt_en-bug-fixes'
> git tree: net
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c5ef5f980000
#stz test
--- x/net/bluetooth/hci_sync.c
+++ y/net/bluetooth/hci_sync.c
@@ -308,6 +308,7 @@ static void hci_cmd_sync_work(struct wor
bt_dev_dbg(hdev, "");
+ hci_req_sync_lock(hdev);
/* Dequeue all entries and run them */
while (1) {
struct hci_cmd_sync_work_entry *entry;
@@ -328,15 +329,14 @@ static void hci_cmd_sync_work(struct wor
if (entry->func) {
int err;
- hci_req_sync_lock(hdev);
err = entry->func(hdev, entry->data);
if (entry->destroy)
entry->destroy(hdev, entry->data, err);
- hci_req_sync_unlock(hdev);
}
kfree(entry);
}
+ hci_req_sync_unlock(hdev);
}
static void hci_cmd_sync_cancel_work(struct work_struct *work)
@@ -5192,6 +5192,15 @@ int hci_dev_close_sync(struct hci_dev *h
cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
}
+ do {
+ struct hci_cmd_sync_work_entry *entry, *tmp;
+
+ mutex_lock(&hdev->cmd_sync_work_lock);
+ list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list)
+ _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
+ mutex_unlock(&hdev->cmd_sync_work_lock);
+ } while (0);
+
/* Avoid potential lockdep warnings from the *_flush() calls by
* ensuring the workqueue is empty up front.
*/
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
[not found] <e9b691c9-f3b9-4bcb-841f-771b24281ecf@yandex.ru>
@ 2025-05-23 9:35 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2025-05-23 9:35 UTC (permalink / raw)
To: dmantipov, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
Tested-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
Tested on:
commit: 94305e83 Merge tag 'pmdomain-v6.15-rc3' of git://git.k..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=172f6ad4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ff3e28823376fa59
dashboard link: https://syzkaller.appspot.com/bug?extid=cc0cc52e7f43dc9e6df1
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
patch: https://syzkaller.appspot.com/x/patch.diff?x=157f25f4580000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
[not found] <CABBYNZJn9-u_w5OWKL0+F6zFTs8JQJLuC8f-FTRQiBgY2w6EBw@mail.gmail.com>
@ 2025-05-28 21:05 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2025-05-28 21:05 UTC (permalink / raw)
To: linux-kernel, luiz.dentz, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
Tested-by: syzbot+cc0cc52e7f43dc9e6df1@syzkaller.appspotmail.com
Tested on:
commit: 57a92d14 net: phy: mscc: Stop clearing the the UDPv4 c..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=10ba83f4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ff3e28823376fa59
dashboard link: https://syzkaller.appspot.com/bug?extid=cc0cc52e7f43dc9e6df1
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
patch: https://syzkaller.appspot.com/x/patch.diff?x=163cc482580000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [bluetooth?] BUG: corrupted list in mgmt_pending_remove
[not found] <CABBYNZ+kXi5iRrJN3UuK2ddQW49jHUwRQToEZ2fphEJRiVA4jQ@mail.gmail.com>
@ 2025-06-02 19:06 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2025-06-02 19:06 UTC (permalink / raw)
To: linux-kernel, luiz.dentz, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-use-after-free Read in mgmt_remove_adv_monitor_complete
==================================================================
BUG: KASAN: slab-use-after-free in mgmt_remove_adv_monitor_complete+0xe5/0x5a0 net/bluetooth/mgmt.c:5400
Read of size 8 at addr ffff88802ddaa820 by task kworker/u9:1/5159
CPU: 0 UID: 0 PID: 5159 Comm: kworker/u9:1 Not tainted 6.15.0-syzkaller-07803-g3382a1ed7f77-dirty #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: hci0 hci_cmd_sync_work
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
mgmt_remove_adv_monitor_complete+0xe5/0x5a0 net/bluetooth/mgmt.c:5400
hci_cmd_sync_work+0x261/0x3a0 net/bluetooth/hci_sync.c:334
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xa52/0x16b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 7763:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4358
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mgmt_pending_new+0x65/0x1e0 net/bluetooth/mgmt_util.c:269
mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296
remove_adv_monitor+0x103/0x1b0 net/bluetooth/mgmt.c:5448
hci_mgmt_cmd+0xc45/0x1240 net/bluetooth/hci_sock.c:1719
hci_sock_sendmsg+0x6d7/0xef0 net/bluetooth/hci_sock.c:1839
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:727
sock_write_iter+0x258/0x330 net/socket.c:1131
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x54b/0xa90 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7760:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 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+0x18e/0x440 mm/slub.c:4841
mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline]
mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257
mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9360
hci_sock_bind+0xb3c/0xf10 net/bluetooth/hci_sock.c:1314
__sys_bind_socket net/socket.c:1810 [inline]
__sys_bind+0x2e3/0x3e0 net/socket.c:1841
__do_sys_bind net/socket.c:1846 [inline]
__se_sys_bind net/socket.c:1844 [inline]
__x64_sys_bind+0x7a/0x90 net/socket.c:1844
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88802ddaa800
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 32 bytes inside of
freed 96-byte region [ffff88802ddaa800, ffff88802ddaa860)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ddaa
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801a441280 ffffea0000c40e80 dead000000000002
raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13, tgid 13 (kworker/u8:1), ts 91611553234, free_ts 91142595267
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1710
prep_new_page mm/page_alloc.c:1718 [inline]
get_page_from_freelist+0x21e0/0x22c0 mm/page_alloc.c:3680
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab+0x8a/0x3b0 mm/slub.c:2618
new_slab mm/slub.c:2672 [inline]
___slab_alloc+0xbfc/0x1480 mm/slub.c:3858
__slab_alloc mm/slub.c:3948 [inline]
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4353
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline]
nsim_fib_event_nb+0x187/0x1080 drivers/net/netdevsim/fib.c:1043
notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
atomic_notifier_call_chain+0xda/0x180 kernel/notifier.c:223
call_fib_notifiers+0x31/0x60 net/core/fib_notifier.c:35
call_fib6_entry_notifiers net/ipv6/ip6_fib.c:409 [inline]
fib6_add_rt2node+0x15fb/0x33a0 net/ipv6/ip6_fib.c:1252
fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1535
__ip6_ins_rt net/ipv6/route.c:1351 [inline]
ip6_ins_rt+0xc8/0x120 net/ipv6/route.c:1361
__ipv6_ifa_notify+0x4ce/0xdd0 net/ipv6/addrconf.c:6286
ipv6_ifa_notify net/ipv6/addrconf.c:6325 [inline]
addrconf_dad_completed+0x180/0xd60 net/ipv6/addrconf.c:4324
page last free pid 10 tgid 10 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1254 [inline]
__free_frozen_pages+0xc6e/0xe50 mm/page_alloc.c:2717
vfree+0x1a6/0x330 mm/vmalloc.c:3416
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3336
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xa52/0x16b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff88802ddaa700: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff88802ddaa780: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff88802ddaa800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88802ddaa880: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
ffff88802ddaa900: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
Tested on:
commit: 3382a1ed net: fix udp gso skb_segment after pull from ..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=10faac82580000
kernel config: https://syzkaller.appspot.com/x/.config?x=6ad994328fa4534e
dashboard link: https://syzkaller.appspot.com/bug?extid=cc0cc52e7f43dc9e6df1
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
patch: https://syzkaller.appspot.com/x/patch.diff?x=16b37970580000
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