==================================================================
BUG: KASAN: slab-out-of-bounds in hlist_move_list include/linux/list.h:986 [inline]
BUG: KASAN: slab-out-of-bounds in collect_expired_timers kernel/time/timer.c:1517 [inline]
BUG: KASAN: slab-out-of-bounds in __run_timers+0x2c8/0x718 kernel/time/timer.c:1753
Write of size 8 at addr ffff0000d28e5a40 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_store8_noabort+0x44/0x50 mm/kasan/report_generic.c:314
 hlist_move_list include/linux/list.h:986 [inline]
 collect_expired_timers kernel/time/timer.c:1517 [inline]
 __run_timers+0x2c8/0x718 kernel/time/timer.c:1753
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780
 handle_softirqs+0x384/0xdbc kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:439 [inline]
 __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
 irq_exit+0x14/0x88 kernel/softirq.c:665
 handle_domain_irq+0xf4/0x178 kernel/irq/irqdesc.c:711
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
 default_idle_call+0xcc/0x4a8 kernel/sched/idle.c:112
 cpuidle_idle_call kernel/sched/idle.c:194 [inline]
 do_idle+0x1d4/0x4dc kernel/sched/idle.c:306
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:403
 rest_init+0x364/0x38c init/main.c:741
 arch_call_rest_init+0x14/0x20 init/main.c:893
 start_kernel+0x440/0x600 init/main.c:1140
 __primary_switched+0xa8/0xb0 arch/arm64/kernel/head.S:468

Allocated by task 14314:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc_node_track_caller+0x234/0x448 mm/slub.c:4963
 kmalloc_reserve+0xe8/0x270 net/core/skbuff.c:356
 __alloc_skb+0x1a4/0x584 net/core/skbuff.c:427
 alloc_skb include/linux/skbuff.h:1162 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x2ec/0x9c0 net/netlink/af_netlink.c:2424
 netlink_rcv_skb+0x1ec/0x3b8 net/netlink/af_netlink.c:2495
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Freed by task 14314:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x84 mm/kasan/common.c:46
 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360
 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kfree+0x178/0x410 mm/slub.c:4559
 skb_free_head net/core/skbuff.c:655 [inline]
 skb_release_data+0x404/0x5fc net/core/skbuff.c:677
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb net/core/skbuff.c:756 [inline]
 consume_skb+0x138/0x40c net/core/skbuff.c:914
 skb_free_datagram+0x30/0xe4 net/core/datagram.c:325
 netlink_recvmsg+0x48c/0xe30 net/netlink/af_netlink.c:1984
 sock_recvmsg_nosec net/socket.c:966 [inline]
 sock_recvmsg net/socket.c:984 [inline]
 __sys_recvfrom+0x33c/0x4ac net/socket.c:2120
 __do_sys_recvfrom net/socket.c:2138 [inline]
 __se_sys_recvfrom net/socket.c:2134 [inline]
 __arm64_sys_recvfrom+0xd8/0xf8 net/socket.c:2134
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the object at ffff0000d28e5800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes to the right of
 512-byte region [ffff0000d28e5800, ffff0000d28e5a00)
The buggy address belongs to the page:
page:00000000a3baa35b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1128e4
head:00000000a3baa35b order:2 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002600
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d28e5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d28e5980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000d28e5a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff0000d28e5a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d28e5b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000007
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x07: level 3 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=00000001086d7000
[0000000000000000] pgd=080000012bd86003, p4d=080000012bd86003, pud=0800000111a09003, pmd=08000001060be003, pte=0000000000000000
Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G    B             5.15.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1451
sp : ffff800008007b60
x29: ffff800008007c20 x28: 1ffff00002972971 x27: dfff800000000000
x26: ffff700001000f70 x25: ffff800014b6d310 x24: 0000000000000001
x23: ffff0000d28e5a38 x22: ffff800008007ba0 x21: 0000000000000101
x20: 0000000000000000 x19: ffff800014b94b88 x18: 0000000000000104
x17: 0000000000000000 x16: ffff800011b4efd4 x15: 00000000ffffffff
x14: ffff800014b94b80 x13: 0000000000000000 x12: ffff800008007a60
x11: 0000000000000101 x10: 0000000000000000 x9 : ffff800014b94b80
x8 : ffff8000083bd904 x7 : 0000000000000000 x6 : ffff8000083bd848
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff800012165a00 x0 : ffff0000d28e5a38
Call trace:
 0x0
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1767
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780
 handle_softirqs+0x384/0xdbc kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:439 [inline]
 __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
 irq_exit+0x14/0x88 kernel/softirq.c:665
 handle_domain_irq+0xf4/0x178 kernel/irq/irqdesc.c:711
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
 default_idle_call+0xcc/0x4a8 kernel/sched/idle.c:112
 cpuidle_idle_call kernel/sched/idle.c:194 [inline]
 do_idle+0x1d4/0x4dc kernel/sched/idle.c:306
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:403
 rest_init+0x364/0x38c init/main.c:741
 arch_call_rest_init+0x14/0x20 init/main.c:893
 start_kernel+0x440/0x600 init/main.c:1140
 __primary_switched+0xa8/0xb0 arch/arm64/kernel/head.S:468
Code: bad PC value
---[ end trace d33e21402d3ffc6b ]---