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Message-ID: <6716159d.050a0220.10f4f4.0043.GAE@google.com>
Date: Mon, 21 Oct 2024 01:49:33 -0700
From: syzbot <syzbot+086fa22d07b56091fd1e@...kaller.appspotmail.com>
To: johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org,
linux-kernel@...r.kernel.org, luiz.dentz@...il.com, marcel@...tmann.org,
syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in bt_accept_dequeue
Hello,
syzbot found the following issue on:
HEAD commit: 788220eee30d Merge tag 'pm-6.11-rc7' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11a2189f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=6217aa8bbaeb1577
dashboard link: https://syzkaller.appspot.com/bug?extid=086fa22d07b56091fd1e
compiler: gcc (Debian 12.2.0-14) 12.2.0, 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/f72c76601a03/disk-788220ee.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/89cddc06c675/vmlinux-788220ee.xz
kernel image: https://storage.googleapis.com/syzbot-assets/22a1d1d497f6/bzImage-788220ee.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+086fa22d07b56091fd1e@...kaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in bt_accept_dequeue+0x582/0x600 net/bluetooth/af_bluetooth.c:249
Read of size 8 at addr ffff8880336f0500 by task krfcommd/2839
CPU: 0 UID: 0 PID: 2839 Comm: krfcommd Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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
bt_accept_dequeue+0x582/0x600 net/bluetooth/af_bluetooth.c:249
l2cap_sock_accept+0x2c8/0x650 net/bluetooth/l2cap_sock.c:351
kernel_accept+0x1d3/0x380 net/socket.c:3607
rfcomm_accept_connection net/bluetooth/rfcomm/core.c:1971 [inline]
rfcomm_process_sessions net/bluetooth/rfcomm/core.c:2030 [inline]
rfcomm_run+0x3a7/0x5220 net/bluetooth/rfcomm/core.c:2126
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
</TASK>
Allocated by task 9307:
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
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:4162 [inline]
__kmalloc_noprof+0x1e8/0x400 mm/slub.c:4174
kmalloc_noprof include/linux/slab.h:685 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2096
sk_alloc+0x36/0xb90 net/core/sock.c:2149
bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148
l2cap_sock_alloc.constprop.0+0x35/0x180 net/bluetooth/l2cap_sock.c:1877
l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1468
l2cap_connect.constprop.0+0x765/0x1270 net/bluetooth/l2cap_core.c:3980
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+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825
l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514
hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline]
hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028
process_one_work+0x9c8/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
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 11681:
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:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4598
sk_prot_free net/core/sock.c:2132 [inline]
__sk_destruct+0x5eb/0x720 net/core/sock.c:2224
sk_destruct+0xc2/0xf0 net/core/sock.c:2239
__sk_free+0xf4/0x3e0 net/core/sock.c:2250
sk_free+0x6a/0x90 net/core/sock.c:2261
sock_put include/net/sock.h:1884 [inline]
l2cap_sock_kill net/bluetooth/l2cap_sock.c:1250 [inline]
l2cap_sock_kill+0x171/0x2d0 net/bluetooth/l2cap_sock.c:1235
l2cap_sock_close_cb+0x44/0x60 net/bluetooth/l2cap_sock.c:1557
l2cap_conn_del+0x3be/0x730 net/bluetooth/l2cap_core.c:1787
l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
hci_conn_failed+0x1c6/0x370 net/bluetooth/hci_conn.c:1265
hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583
hci_disconnect_all_sync.constprop.0+0x104/0x3c0 net/bluetooth/hci_sync.c:5606
hci_suspend_sync+0x772/0xab0 net/bluetooth/hci_sync.c:6083
hci_suspend_dev+0x2ac/0x480 net/bluetooth/hci_core.c:2826
hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2412
notifier_call_chain+0xbc/0x410 kernel/notifier.c:93
notifier_call_chain_robust kernel/notifier.c:128 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:353 [inline]
blocking_notifier_call_chain_robust+0xc9/0x170 kernel/notifier.c:341
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x198/0x2b0 kernel/power/user.c:77
misc_open+0x3dd/0x4c0 drivers/char/misc.c:165
chrdev_open+0x270/0x6f0 fs/char_dev.c:414
do_dentry_open+0x922/0x15f0 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880336f0000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1280 bytes inside of
freed 2048-byte region [ffff8880336f0000, ffff8880336f0800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880336f6000 pfn:0x336f0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810
raw: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000
head: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810
head: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000cdbc01 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5518, tgid 5518 (kworker/0:7), ts 1161965798443, free_ts 1161930025325
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x4e/0xf0 mm/slub.c:2325
allocate_slab mm/slub.c:2488 [inline]
new_slab+0x84/0x260 mm/slub.c:2541
___slab_alloc+0xdac/0x1870 mm/slub.c:3727
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
__slab_alloc_node mm/slub.c:3870 [inline]
slab_alloc_node mm/slub.c:4029 [inline]
__do_kmalloc_node mm/slub.c:4161 [inline]
__kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4181
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605
__alloc_skb+0x164/0x380 net/core/skbuff.c:674
alloc_skb include/linux/skbuff.h:1320 [inline]
alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6526
sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2815
sock_alloc_send_skb include/net/sock.h:1778 [inline]
mld_newpack.isra.0+0x1ed/0x790 net/ipv6/mcast.c:1746
add_grhead+0x299/0x340 net/ipv6/mcast.c:1849
add_grec+0x111e/0x1670 net/ipv6/mcast.c:1987
mld_send_cr net/ipv6/mcast.c:2113 [inline]
mld_ifc_work+0x41f/0xca0 net/ipv6/mcast.c:2650
page last free pid 11267 tgid 11267 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619
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:3992 [inline]
slab_alloc_node mm/slub.c:4041 [inline]
__kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4188
kmalloc_noprof include/linux/slab.h:681 [inline]
call_modprobe kernel/module/kmod.c:84 [inline]
__request_module+0x2c6/0x6c0 kernel/module/kmod.c:173
dev_load+0x1ff/0x240 net/core/dev_ioctl.c:646
dev_ioctl+0x473/0x10c0 net/core/dev_ioctl.c:710
sock_do_ioctl+0x19e/0x280 net/socket.c:1236
sock_ioctl+0x22e/0x6c0 net/socket.c:1341
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x196/0x220 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880336f0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880336f0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880336f0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880336f0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880336f0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]
BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline]
BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline]
BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline]
BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:779 [inline]
BUG: KASAN: slab-use-after-free in bt_accept_dequeue+0x1f6/0x600 net/bluetooth/af_bluetooth.c:253
Write of size 4 at addr ffff8880336f0080 by task krfcommd/2839
CPU: 1 UID: 0 PID: 2839 Comm: krfcommd Tainted: G B 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]
__refcount_add include/linux/refcount.h:184 [inline]
__refcount_inc include/linux/refcount.h:241 [inline]
refcount_inc include/linux/refcount.h:258 [inline]
sock_hold include/net/sock.h:779 [inline]
bt_accept_dequeue+0x1f6/0x600 net/bluetooth/af_bluetooth.c:253
l2cap_sock_accept+0x2c8/0x650 net/bluetooth/l2cap_sock.c:351
kernel_accept+0x1d3/0x380 net/socket.c:3607
rfcomm_accept_connection net/bluetooth/rfcomm/core.c:1971 [inline]
rfcomm_process_sessions net/bluetooth/rfcomm/core.c:2030 [inline]
rfcomm_run+0x3a7/0x5220 net/bluetooth/rfcomm/core.c:2126
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
</TASK>
Allocated by task 9307:
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
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:4162 [inline]
__kmalloc_noprof+0x1e8/0x400 mm/slub.c:4174
kmalloc_noprof include/linux/slab.h:685 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2096
sk_alloc+0x36/0xb90 net/core/sock.c:2149
bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148
l2cap_sock_alloc.constprop.0+0x35/0x180 net/bluetooth/l2cap_sock.c:1877
l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1468
l2cap_connect.constprop.0+0x765/0x1270 net/bluetooth/l2cap_core.c:3980
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+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825
l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514
hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline]
hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028
process_one_work+0x9c8/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
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 11681:
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:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4598
sk_prot_free net/core/sock.c:2132 [inline]
__sk_destruct+0x5eb/0x720 net/core/sock.c:2224
sk_destruct+0xc2/0xf0 net/core/sock.c:2239
__sk_free+0xf4/0x3e0 net/core/sock.c:2250
sk_free+0x6a/0x90 net/core/sock.c:2261
sock_put include/net/sock.h:1884 [inline]
l2cap_sock_kill net/bluetooth/l2cap_sock.c:1250 [inline]
l2cap_sock_kill+0x171/0x2d0 net/bluetooth/l2cap_sock.c:1235
l2cap_sock_close_cb+0x44/0x60 net/bluetooth/l2cap_sock.c:1557
l2cap_conn_del+0x3be/0x730 net/bluetooth/l2cap_core.c:1787
l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241
hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline]
hci_conn_failed+0x1c6/0x370 net/bluetooth/hci_conn.c:1265
hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583
hci_disconnect_all_sync.constprop.0+0x104/0x3c0 net/bluetooth/hci_sync.c:5606
hci_suspend_sync+0x772/0xab0 net/bluetooth/hci_sync.c:6083
hci_suspend_dev+0x2ac/0x480 net/bluetooth/hci_core.c:2826
hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2412
notifier_call_chain+0xbc/0x410 kernel/notifier.c:93
notifier_call_chain_robust kernel/notifier.c:128 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:353 [inline]
blocking_notifier_call_chain_robust+0xc9/0x170 kernel/notifier.c:341
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x198/0x2b0 kernel/power/user.c:77
misc_open+0x3dd/0x4c0 drivers/char/misc.c:165
chrdev_open+0x270/0x6f0 fs/char_dev.c:414
do_dentry_open+0x922/0x15f0 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880336f0000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
freed 2048-byte region [ffff8880336f0000, ffff8880336f0800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880336f6000 pfn:0x336f0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810
raw: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000
head: 00fff00000000240 ffff88801ac42000 ffffea0000a01810 ffffea00015e7810
head: ffff8880336f6000 0000000000080001 00000001fdffffff 0000000000000000
head: 00fff00000000003 ffffea0000cdbc01 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5518, tgid 5518 (kworker/0:7), ts 1161965798443, free_ts 1161930025325
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x4e/0xf0 mm/slub.c:2325
allocate_slab mm/slub.c:2488 [inline]
new_slab+0x84/0x260 mm/slub.c:2541
___slab_alloc+0xdac/0x1870 mm/slub.c:3727
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
__slab_alloc_node mm/slub.c:3870 [inline]
slab_alloc_node mm/slub.c:4029 [inline]
__do_kmalloc_node mm/slub.c:4161 [inline]
__kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4181
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605
__alloc_skb+0x164/0x380 net/core/skbuff.c:674
alloc_skb include/linux/skbuff.h:1320 [inline]
alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6526
sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2815
sock_alloc_send_skb include/net/sock.h:1778 [inline]
mld_newpack.isra.0+0x1ed/0x790 net/ipv6/mcast.c:1746
add_grhead+0x299/0x340 net/ipv6/mcast.c:1849
add_grec+0x111e/0x1670 net/ipv6/mcast.c:1987
mld_send_cr net/ipv6/mcast.c:2113 [inline]
mld_ifc_work+0x41f/0xca0 net/ipv6/mcast.c:2650
page last free pid 11267 tgid 11267 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1101 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619
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:3992 [inline]
slab_alloc_node mm/slub.c:4041 [inline]
__kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4188
kmalloc_noprof include/linux/slab.h:681 [inline]
call_modprobe kernel/module/kmod.c:84 [inline]
__request_module+0x2c6/0x6c0 kernel/module/kmod.c:173
dev_load+0x1ff/0x240 net/core/dev_ioctl.c:646
dev_ioctl+0x473/0x10c0 net/core/dev_ioctl.c:710
sock_do_ioctl+0x19e/0x280 net/socket.c:1236
sock_ioctl+0x22e/0x6c0 net/socket.c:1341
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x196/0x220 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880336eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880336f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880336f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880336f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880336f0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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