==================================================================
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
Read of size 1 at addr ffff8880611cb818 by task syz.8.3459/19371
CPU: 0 UID: 0 PID: 19371 Comm: syz.8.3459 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x156/0x4c9 mm/kasan/report.c:482
kasan_report+0xdf/0x1a0 mm/kasan/report.c:595
__kasan_check_byte+0x36/0x50 mm/kasan/common.c:574
kasan_check_byte include/linux/kasan.h:402 [inline]
lock_acquire kernel/locking/lockdep.c:5842 [inline]
lock_acquire+0xf5/0x330 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
p9_tag_remove net/9p/client.c:274 [inline]
p9_req_put net/9p/client.c:282 [inline]
p9_req_put+0xaf/0x250 net/9p/client.c:279
req_done+0x1dc/0x2e0 net/9p/trans_virtio.c:147
vring_interrupt+0x33b/0x430 drivers/virtio/virtio_ring.c:2718
__handle_irq_event_percpu+0x232/0x800 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x375/0x970 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
handle_irq arch/x86/kernel/irq.c:255 [inline]
call_irq_handler arch/x86/kernel/irq.c:311 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:326
common_interrupt+0x60/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
RIP: 0010:handle_softirqs+0x1ad/0x910 kernel/softirq.c:608
Code: 20 44 88 74 24 1e 45 89 ee 48 c7 c7 e0 6f 8d 8b e8 f8 e5 ac 09 31 d2 65 66 89 15 d6 a8 1c 12 e8 d9 0a 47 00 fb bb ff ff ff ff <49> c7 c4 c0 c0 20 8e 41 0f bc de 83 c3 01 0f 85 a4 00 00 00 e9 ab
RSP: 0000:ffffc90000007f30 EFLAGS: 00000206
RAX: 000000000002ee88 RBX: 00000000ffffffff RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff8dc413ca RDI: ffffffff8bfa32a0
RBP: 0000000100013bc3 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000000a
R13: 0000000000000200 R14: 0000000000000200 R15: 1ffff92000000fed
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:616 [inline]
RIP: 0010:__mutex_lock+0x1a2/0x1b90 kernel/locking/mutex.c:776
Code: f6 48 8d 43 68 31 c9 31 d2 4d 89 e9 48 89 85 88 fe ff ff 48 89 c7 41 b8 01 00 00 00 44 89 e6 ff b5 a8 fe ff ff e8 9e d6 6c f6 21 00 00 00 48 89 df e8 61 d6 6b f6 be 08 00 00 00 48 89 df 48
RSP: 0000:ffffc9000e1f7668 EFLAGS: 00000296
RAX: 0000000000000000 RBX: ffff888025df5d10 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8dc1b439 RDI: ffffffff8bfa32a0
RBP: ffffc9000e1f77f0 R08: 00000000c565a97f R09: 000000000000067a
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
__unix_dgram_recvmsg+0x255/0xc30 net/unix/af_unix.c:2573
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2675
sock_recvmsg_nosec net/socket.c:1078 [inline]
____sys_recvmsg+0x5f7/0x6b0 net/socket.c:2810
___sys_recvmsg+0x16a/0x1a0 net/socket.c:2854
do_recvmmsg+0x563/0x760 net/socket.c:2941
__sys_recvmmsg+0x21f/0x270 net/socket.c:3023
__do_compat_sys_recvmmsg_time32 net/compat.c:418 [inline]
__se_compat_sys_recvmmsg_time32 net/compat.c:414 [inline]
__ia32_compat_sys_recvmmsg_time32+0xc4/0x160 net/compat.c:414
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xde/0x660 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf73ad579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00
RSP: 002b:00000000f53b550c EFLAGS: 00000292 ORIG_RAX: 0000000000000151
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000040
RDX: 00000000080002c1 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 19378:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kmalloc_noprof include/linux/slab.h:957 [inline]
p9_client_create+0xaf/0xd40 net/9p/client.c:862
v9fs_session_init+0x40/0xce0 fs/9p/v9fs.c:442
v9fs_get_tree+0xb8/0xb50 fs/9p/vfs_super.c:97
vfs_get_tree+0x92/0x320 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7d0/0x23c0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__ia32_sys_mount+0x292/0x310 fs/namespace.c:4201
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xde/0x660 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 19378:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6674 [inline]
kfree+0x1c7/0x690 mm/slub.c:6882
p9_client_create+0x72d/0xd40 net/9p/client.c:941
v9fs_session_init+0x40/0xce0 fs/9p/v9fs.c:442
v9fs_get_tree+0xb8/0xb50 fs/9p/vfs_super.c:97
vfs_get_tree+0x92/0x320 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7d0/0x23c0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__ia32_sys_mount+0x292/0x310 fs/namespace.c:4201
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xde/0x660 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff8880611cb800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
freed 512-byte region [ffff8880611cb800, ffff8880611cba00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x611c8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000040 ffff88801b842c80 ffffea0000967200 dead000000000003
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 04fff00000000040 ffff88801b842c80 ffffea0000967200 dead000000000003
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 04fff00000000002 ffffea0001847201 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5955, tgid 5955 (syz-executor), ts 119499456738, free_ts 119492596131
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1e1/0x250 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0xe3d/0x2e10 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x26c/0x2410 mm/page_alloc.c:5240
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab mm/slub.c:3248 [inline]
new_slab+0x2c4/0x440 mm/slub.c:3302
___slab_alloc+0xda3/0x1ca0 mm/slub.c:4656
__slab_alloc.isra.0+0x63/0x110 mm/slub.c:4779
__slab_alloc_node mm/slub.c:4855 [inline]
slab_alloc_node mm/slub.c:5251 [inline]
__kmalloc_cache_noprof+0x531/0x810 mm/slub.c:5775
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
inetdev_init+0x66/0x570 net/ipv4/devinet.c:273
inetdev_event+0x7fa/0x17f0 net/ipv4/devinet.c:1590
notifier_call_chain+0x99/0x3b0 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x110 net/core/dev.c:2243
call_netdevice_notifiers_extack net/core/dev.c:2281 [inline]
call_netdevice_notifiers net/core/dev.c:2295 [inline]
register_netdevice+0x16b9/0x21d0 net/core/dev.c:11444
team_newlink+0xb4/0x190 drivers/net/team/team_core.c:2150
rtnl_newlink_create net/core/rtnetlink.c:3840 [inline]
__rtnl_newlink net/core/rtnetlink.c:3957 [inline]
rtnl_newlink+0x1494/0x2380 net/core/rtnetlink.c:4072
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6958
page last free pid 5955 tgid 5955 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0x822/0x1130 mm/page_alloc.c:2973
stack_depot_save_flags+0x412/0x9c0 lib/stackdepot.c:727
kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kmalloc_noprof include/linux/slab.h:957 [inline]
netdev_name_node_alloc net/core/dev.c:270 [inline]
netdev_name_node_head_alloc net/core/dev.c:284 [inline]
register_netdevice+0x50c/0x21d0 net/core/dev.c:11327
team_newlink+0xb4/0x190 drivers/net/team/team_core.c:2150
rtnl_newlink_create net/core/rtnetlink.c:3840 [inline]
__rtnl_newlink net/core/rtnetlink.c:3957 [inline]
rtnl_newlink+0x1494/0x2380 net/core/rtnetlink.c:4072
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6958
netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg net/socket.c:742 [inline]
__sys_sendto+0x4aa/0x520 net/socket.c:2206
__do_compat_sys_socketcall net/compat.c:475 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x59a/0x770 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
do_int80_emulation+0x101/0x470 arch/x86/entry/syscall_32.c:172
asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
Memory state around the buggy address:
ffff8880611cb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880611cb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880611cb800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880611cb880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880611cb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 20 44 88 74 and %al,0x74(%rax,%rcx,4)
4: 24 1e and $0x1e,%al
6: 45 89 ee mov %r13d,%r14d
9: 48 c7 c7 e0 6f 8d 8b mov $0xffffffff8b8d6fe0,%rdi
10: e8 f8 e5 ac 09 call 0x9ace60d
15: 31 d2 xor %edx,%edx
17: 65 66 89 15 d6 a8 1c mov %dx,%gs:0x121ca8d6(%rip) # 0x121ca8f5
1e: 12
1f: e8 d9 0a 47 00 call 0x470afd
24: fb sti
25: bb ff ff ff ff mov $0xffffffff,%ebx
* 2a: 49 c7 c4 c0 c0 20 8e mov $0xffffffff8e20c0c0,%r12 <-- trapping instruction
31: 41 0f bc de bsf %r14d,%ebx
35: 83 c3 01 add $0x1,%ebx
38: 0f 85 a4 00 00 00 jne 0xe2
3e: e9 .byte 0xe9
3f: ab stos %eax,%es:(%rdi)