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BUG: KASAN: slab-out-of-bounds in walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57
Read of size 8 at addr ffffaf800e867c50 by task syz-executor.0/3507

CPU: 0 PID: 3507 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000a228>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113
[<ffffffff831668cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119
[<ffffffff831756ba>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff831756ba>] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106
[<ffffffff8047479e>] print_address_description.constprop.0+0x2a/0x330 mm/kasan/report.c:255
[<ffffffff80474d4c>] __kasan_report mm/kasan/report.c:442 [inline]
[<ffffffff80474d4c>] kasan_report+0x184/0x1e0 mm/kasan/report.c:459
[<ffffffff80475b20>] check_region_inline mm/kasan/generic.c:183 [inline]
[<ffffffff80475b20>] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256
[<ffffffff8000a052>] walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57
[<ffffffff8000a4a4>] arch_stack_walk+0x2c/0x3c arch/riscv/kernel/stacktrace.c:146
[<ffffffff80162ac8>] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
[<ffffffff80473abe>] kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
[<ffffffff804742e4>] kasan_set_track mm/kasan/common.c:45 [inline]
[<ffffffff804742e4>] set_alloc_info mm/kasan/common.c:436 [inline]
[<ffffffff804742e4>] __kasan_slab_alloc+0x8e/0x98 mm/kasan/common.c:469
[<ffffffff804709fc>] kasan_slab_alloc include/linux/kasan.h:260 [inline]
[<ffffffff804709fc>] slab_post_alloc_hook mm/slab.h:732 [inline]
[<ffffffff804709fc>] slab_alloc_node mm/slub.c:3230 [inline]
[<ffffffff804709fc>] slab_alloc mm/slub.c:3238 [inline]
[<ffffffff804709fc>] kmem_cache_alloc+0x338/0x3de mm/slub.c:3243

Allocated by task 1102416563:
(stack is not available)

Last potentially related work creation:
------------[ cut here ]------------
slab index 1506960 out of bounds (373) for stack id 8456fe90
WARNING: CPU: 0 PID: 3507 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline]
WARNING: CPU: 0 PID: 3507 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276
Modules linked in:
CPU: 0 PID: 3507 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
epc : stack_depot_fetch lib/stackdepot.c:304 [inline]
epc : stack_depot_print+0x66/0x70 lib/stackdepot.c:276
 ra : stack_depot_fetch lib/stackdepot.c:304 [inline]
 ra : stack_depot_print+0x66/0x70 lib/stackdepot.c:276
epc : ffffffff80c00b8a ra : ffffffff80c00b8a sp : ffffaf800e867ae0
 gp : ffffffff85863ac0 tp : ffffaf80100d0000 t0 : ffffffff86bcb657
 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800e867af0
 s1 : ffffaf807aa5eb00 a0 : 000000000000003c a1 : 00000000000f0000
 a2 : 0000000000000504 a3 : ffffffff8012252a a4 : a2fa1eec36746800
 a5 : a2fa1eec36746800 a6 : 0000000000f00000 a7 : ffffaf805a9c8863
 s2 : ffffaf800e867c50 s3 : ffffaf800720c280 s4 : ffffaf800e866000
 s5 : ffffaf800e867000 s6 : 0000000000003fff s7 : ffffaf800e867c40
 s8 : ffffffff8000a4a4 s9 : ffffffffffffc000 s10: ffffaf800e867ca0
 s11: 0000000000000008 t3 : fffffffff3f3f300 t4 : fffff5ef0b53910c
 t5 : fffff5ef0b53910d t6 : ffffaf800e8675d8
status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003
[<ffffffff80474a70>] describe_object_stacks mm/kasan/report.c:216 [inline]
[<ffffffff80474a70>] describe_object mm/kasan/report.c:231 [inline]
[<ffffffff80474a70>] print_address_description.constprop.0+0x2fc/0x330 mm/kasan/report.c:263
[<ffffffff80474d4c>] __kasan_report mm/kasan/report.c:442 [inline]
[<ffffffff80474d4c>] kasan_report+0x184/0x1e0 mm/kasan/report.c:459
[<ffffffff80475b20>] check_region_inline mm/kasan/generic.c:183 [inline]
[<ffffffff80475b20>] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256
[<ffffffff8000a052>] walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57
[<ffffffff8000a4a4>] arch_stack_walk+0x2c/0x3c arch/riscv/kernel/stacktrace.c:146
[<ffffffff80162ac8>] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
[<ffffffff80473abe>] kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
[<ffffffff804742e4>] kasan_set_track mm/kasan/common.c:45 [inline]
[<ffffffff804742e4>] set_alloc_info mm/kasan/common.c:436 [inline]
[<ffffffff804742e4>] __kasan_slab_alloc+0x8e/0x98 mm/kasan/common.c:469
[<ffffffff804709fc>] kasan_slab_alloc include/linux/kasan.h:260 [inline]
[<ffffffff804709fc>] slab_post_alloc_hook mm/slab.h:732 [inline]
[<ffffffff804709fc>] slab_alloc_node mm/slub.c:3230 [inline]
[<ffffffff804709fc>] slab_alloc mm/slub.c:3238 [inline]
[<ffffffff804709fc>] kmem_cache_alloc+0x338/0x3de mm/slub.c:3243
irq event stamp: 43629
hardirqs last  enabled at (43628): [<ffffffff82af6ea8>] seqcount_lockdep_reader_access include/linux/seqlock.h:105 [inline]
hardirqs last  enabled at (43628): [<ffffffff82af6ea8>] read_seqbegin include/linux/seqlock.h:840 [inline]
hardirqs last  enabled at (43628): [<ffffffff82af6ea8>] neigh_hh_output include/net/neighbour.h:495 [inline]
hardirqs last  enabled at (43628): [<ffffffff82af6ea8>] neigh_output include/net/neighbour.h:539 [inline]
hardirqs last  enabled at (43628): [<ffffffff82af6ea8>] ip_finish_output2+0x157a/0x1720 net/ipv4/ip_output.c:221
hardirqs last disabled at (43629): [<ffffffff831afa4e>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (43629): [<ffffffff831afa4e>] _raw_spin_lock_irqsave+0x60/0x62 kernel/locking/spinlock.c:162
softirqs last  enabled at (43512): [<ffffffff82c6ad60>] spin_unlock_bh include/linux/spinlock.h:394 [inline]
softirqs last  enabled at (43512): [<ffffffff82c6ad60>] clusterip_netdev_event+0x268/0x4aa net/ipv4/netfilter/ipt_CLUSTERIP.c:233
softirqs last disabled at (43523): [<ffffffff80061288>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (43523): [<ffffffff80061288>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (43523): [<ffffffff80061288>] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637
---[ end trace 0000000000000000 ]---

The buggy address belongs to the object at ffffaf800e866000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 3152 bytes to the right of
 4096-byte region [ffffaf800e866000, ffffaf800e867000)
The buggy address belongs to the page:
page:ffffaf807aa5eb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ea60
head:ffffaf807aa5eb00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8800010200(slab|head|section=17|node=0|zone=0)
raw: 0000008800010200 0000000000000100 0000000000000122 ffffaf800720c280
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
raw: 00000000000007ff
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 62052182000, free_ts 0
 __set_page_owner+0x48/0x136 mm/page_owner.c:183
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0xd0/0x10a mm/page_alloc.c:2427
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0x8da/0x12d8 mm/page_alloc.c:4165
 __alloc_pages+0x150/0x3b6 mm/page_alloc.c:5389
 alloc_page_interleave+0x2a/0x1cc mm/mempolicy.c:2116
 alloc_pages+0x210/0x2a6 mm/mempolicy.c:2266
 alloc_slab_page.constprop.0+0xc2/0xfa mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x25a/0x2cc mm/slub.c:2004
 ___slab_alloc+0x56e/0x918 mm/slub.c:3018
 __slab_alloc.constprop.0+0x50/0x8c mm/slub.c:3105
 slab_alloc_node mm/slub.c:3196 [inline]
 __kmalloc_node+0x27a/0x36c mm/slub.c:4468
 kmalloc_node include/linux/slab.h:604 [inline]
 kvmalloc_node+0x48/0x108 mm/util.c:580
 kvmalloc include/linux/slab.h:732 [inline]
 kvzalloc include/linux/slab.h:740 [inline]
 alloc_netdev_mqs+0xa4/0x7ba net/core/dev.c:10163
 dummy_init_one drivers/net/dummy.c:165 [inline]
 dummy_init_module+0x116/0x1c8 drivers/net/dummy.c:191
 do_one_initcall+0x13a/0x7ea init/main.c:1300
 do_initcall_level init/main.c:1373 [inline]
 do_initcalls init/main.c:1389 [inline]
 do_basic_setup init/main.c:1408 [inline]
 kernel_init_freeable+0x510/0x5b4 init/main.c:1613
page_owner free stack trace missing

Memory state around the buggy address:
 ffffaf800e867b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffffaf800e867b80: fc fc fc fc fc fc fc fc fc fc fc fc 00 00 00 00
>ffffaf800e867c00: 00 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00
                                                 ^
 ffffaf800e867c80: f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffffaf800e867d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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