sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
==================================================================
BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x972/0x980
Write of size 8 at addr ffff88801db78470 by task swapper/1/0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
print_report+0xcb/0x610
kasan_report+0xca/0x100
__xfrm_state_delete+0x972/0x980
xfrm_timer_handler+0x4cc/0xbb0
__hrtimer_run_queues+0x1ee/0xac0
hrtimer_run_softirq+0x14c/0x310
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0x1e/0x30
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d 09 1a 0a 00 0f 1f 44 00 00 fb f4 9d 82 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90
RSP: 0018:ffff888009717e58 EFLAGS: 00000202
RAX: 0000000000f20237 RBX: 0000000000000001 RCX: ffffffff84bb7167
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814c6e94
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e630a
R10: ffff88806cf31853 R11: 0000000000000001 R12: ffffffff8643d150
R13: 1ffff110012e2fd2 R14: 0000000000000000 R15: 0000000000000000
default_idle+0xe/0x20
default_idle_call+0x6d/0xb0
do_idle+0x344/0x490
cpu_startup_entry+0x4f/0x60
start_secondary+0x1bd/0x210
common_startup_64+0x13e/0x148
Allocated by task 15642:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_noprof+0x13c/0x3d0
xfrm_state_alloc+0x25/0x600
__find_acq_core+0x9c8/0x27a0
xfrm_find_acq+0x7f/0xb0
xfrm_alloc_userspi+0x589/0xbb0
xfrm_user_rcv_msg+0x459/0xa00
netlink_rcv_skb+0x147/0x430
xfrm_netlink_rcv+0x74/0x90
netlink_unicast+0x5a7/0x870
netlink_sendmsg+0x8ac/0xd80
____sys_sendmsg+0xa67/0xc20
___sys_sendmsg+0x10f/0x1b0
__sys_sendmsg+0x150/0x200
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15509:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3a/0x60
__kasan_slab_free+0x3f/0x50
kmem_cache_free+0x2a1/0x460
xfrm_state_gc_task+0x107/0x740
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
The buggy address belongs to the object at ffff88801db78440
which belongs to the cache xfrm_state of size 920
The buggy address is located 48 bytes inside of
freed 920-byte region [ffff88801db78440, ffff88801db787d8)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88801db7bb80 pfn:0x1db78
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff88800a7b0780 0000000000000000 0000000000000001
raw: ffff88801db7bb80 00000000000f0008 00000000f5000000 0000000000000000
head: 0100000000000040 ffff88800a7b0780 0000000000000000 0000000000000001
head: ffff88801db7bb80 00000000000f0008 00000000f5000000 0000000000000000
head: 0100000000000002 ffffea000076de01 00000000ffffffff 00000000ffffffff
head: 0000000000000013 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88801db78300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88801db78380: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801db78400: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88801db78480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801db78500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current]
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present
sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 02 00 00 02 00
blk_print_req_error: 16 callbacks suppressed
I/O error, dev sr0, sector 8 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 8 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
buffer_io_error: 30 callbacks suppressed
Buffer I/O error on dev sr0, logical block 8, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 9 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 9, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 10 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 10, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 11 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 11, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 12 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 12, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 13 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 13, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 14 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 14, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 15 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 15, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 8 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sr0, logical block 8, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Buffer I/O error on dev sr0, logical block 9, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: f3 0f 1e fa endbr64
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: eb 0c jmp 0x23
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: 0f 00 2d 09 1a 0a 00 verw 0xa1a09(%rip) # 0xa1a2c
23: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
28: fb sti
29: f4 hlt
* 2a: e9 9d 82 02 00 jmpq 0x282cc <-- trapping instruction
2f: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
36: 00 00 00
39: 0f 1f 00 nopl (%rax)
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop