==================================================================
BUG: KASAN: slab-out-of-bounds in __bfs+0x154/0x394 kernel/locking/lockdep.c:1708
Read of size 8 at addr ffffaf800c2ffaf0 by task syz-executor.1/2033

CPU: 0 PID: 2033 Comm: syz-executor.1 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
[<ffffffff8010dd9a>] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708
[<ffffffff8010e52a>] __bfs_forwards kernel/locking/lockdep.c:1803 [inline]
[<ffffffff8010e52a>] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104
[<ffffffff8010f95c>] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131
[<ffffffff80113c26>] check_prev_add kernel/locking/lockdep.c:3063 [inline]
[<ffffffff80113c26>] check_prevs_add kernel/locking/lockdep.c:3186 [inline]
[<ffffffff80113c26>] validate_chain kernel/locking/lockdep.c:3801 [inline]
[<ffffffff80113c26>] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027
[<ffffffff80116582>] lock_acquire.part.0+0x1d0/0x424 kernel/locking/lockdep.c:5639
[<ffffffff8011682a>] lock_acquire+0x54/0x6a kernel/locking/lockdep.c:5612
[<ffffffff80416d44>] local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
[<ffffffff80416d44>] rmqueue_pcplist mm/page_alloc.c:3660 [inline]
[<ffffffff80416d44>] rmqueue mm/page_alloc.c:3698 [inline]
[<ffffffff80416d44>] get_page_from_freelist+0xbc2/0x12d8 mm/page_alloc.c:4162

Allocated by task 1:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc mm/kasan/common.c:515 [inline]
 ____kasan_kmalloc mm/kasan/common.c:474 [inline]
 __kasan_kmalloc+0x80/0xb2 mm/kasan/common.c:524
 kasan_kmalloc include/linux/kasan.h:270 [inline]
 kmem_cache_alloc_trace+0x178/0x2e0 mm/slub.c:3257
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 device_private_init drivers/base/core.c:3249 [inline]
 device_add+0xce0/0x129e drivers/base/core.c:3299
 device_register+0x20/0x2a drivers/base/core.c:3486
 tty_register_device_attr+0x27a/0x4bc drivers/tty/tty_io.c:3253
 tty_register_device drivers/tty/tty_io.c:3188 [inline]
 tty_register_driver+0x2ca/0x4b2 drivers/tty/tty_io.c:3453
 legacy_pty_init drivers/tty/pty.c:589 [inline]
 pty_init+0x310/0x7e6 drivers/tty/pty.c:953
 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
 kernel_init+0x28/0x21c init/main.c:1502
 ret_from_exception+0x0/0x10

Last potentially related work creation:
------------[ cut here ]------------
slab index 340096 out of bounds (290) for stack id 0be53080
WARNING: CPU: 0 PID: 2033 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline]
WARNING: CPU: 0 PID: 2033 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276
Modules linked in:
CPU: 0 PID: 2033 Comm: syz-executor.1 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 : ffffaf800c2ff880
 gp : ffffffff85863ac0 tp : ffffaf800be53080 t0 : ffffffff86bcb657
 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800c2ff890
 s1 : ffffaf807a9b66e0 a0 : 000000000000003b a1 : 00000000000f0000
 a2 : 0000000000000504 a3 : ffffffff8012252a a4 : f1232ceb7708db00
 a5 : f1232ceb7708db00 a6 : 0000000000f00000 a7 : ffffaf805a9c8863
 s2 : ffffaf800c2ffaf0 s3 : ffffaf8007201c80 s4 : ffffaf800c2ff800
 s5 : ffffaf800c2ffa00 s6 : ffffffff8588bb20 s7 : ffffffff85e09180
 s8 : ffffaf800c2ffa00 s9 : ffffaf800be53c50 s10: ffffffff85899680
 s11: ffffaf800be53080 t3 : ffffffff801163b2 t4 : fffff5ef0b53910c
 t5 : fffff5ef0b53910d t6 : ffffaf800c2ff378
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
[<ffffffff8010dd9a>] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708
[<ffffffff8010e52a>] __bfs_forwards kernel/locking/lockdep.c:1803 [inline]
[<ffffffff8010e52a>] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104
[<ffffffff8010f95c>] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131
[<ffffffff80113c26>] check_prev_add kernel/locking/lockdep.c:3063 [inline]
[<ffffffff80113c26>] check_prevs_add kernel/locking/lockdep.c:3186 [inline]
[<ffffffff80113c26>] validate_chain kernel/locking/lockdep.c:3801 [inline]
[<ffffffff80113c26>] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027
[<ffffffff80116582>] lock_acquire.part.0+0x1d0/0x424 kernel/locking/lockdep.c:5639
[<ffffffff8011682a>] lock_acquire+0x54/0x6a kernel/locking/lockdep.c:5612
[<ffffffff80416d44>] local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
[<ffffffff80416d44>] rmqueue_pcplist mm/page_alloc.c:3660 [inline]
[<ffffffff80416d44>] rmqueue mm/page_alloc.c:3698 [inline]
[<ffffffff80416d44>] get_page_from_freelist+0xbc2/0x12d8 mm/page_alloc.c:4162
irq event stamp: 59335
hardirqs last  enabled at (59334): [<ffffffff831afd54>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (59334): [<ffffffff831afd54>] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194
hardirqs last disabled at (59335): [<ffffffff80417140>] rmqueue_pcplist mm/page_alloc.c:3660 [inline]
hardirqs last disabled at (59335): [<ffffffff80417140>] rmqueue mm/page_alloc.c:3698 [inline]
hardirqs last disabled at (59335): [<ffffffff80417140>] get_page_from_freelist+0xfbe/0x12d8 mm/page_alloc.c:4162
softirqs last  enabled at (59218): [<ffffffff831b0bd0>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (59218): [<ffffffff831b0bd0>] __do_softirq+0x618/0x8fc kernel/softirq.c:587
softirqs last disabled at (59249): [<ffffffff80061288>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (59249): [<ffffffff80061288>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (59249): [<ffffffff80061288>] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637
---[ end trace 0000000000000000 ]---

Second to last potentially related work creation:
------------[ cut here ]------------
slab index 2076544 out of bounds (290) for stack id ffffaf80
WARNING: CPU: 0 PID: 2033 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline]
WARNING: CPU: 0 PID: 2033 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276
Modules linked in:
CPU: 0 PID: 2033 Comm: syz-executor.1 Tainted: G        W         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 : ffffaf800c2ff880
 gp : ffffffff85863ac0 tp : ffffaf800be53080 t0 : ffffffff86bcb657
 t1 : fffff5ef0b53910c t2 : 0000000000000000 s0 : ffffaf800c2ff890
 s1 : ffffaf807a9b66e0 a0 : 000000000000003c a1 : 00000000000f0000
 a2 : 0000000000000504 a3 : ffffffff8012252a a4 : f1232ceb7708db00
 a5 : f1232ceb7708db00 a6 : 0000000000f00000 a7 : ffffaf805a9c8863
 s2 : ffffaf800c2ffaf0 s3 : ffffaf8007201c80 s4 : ffffaf800c2ff800
 s5 : ffffaf800c2ffa00 s6 : ffffffff8588bb20 s7 : ffffffff85e09180
 s8 : ffffaf800c2ffa00 s9 : ffffaf800be53c50 s10: ffffffff85899680
 s11: ffffaf800be53080 t3 : ffffffff801163b2 t4 : fffff5ef0b53910c
 t5 : fffff5ef0b53910d t6 : ffffaf800c2ff378
status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003
[<ffffffff80474a22>] describe_object_stacks mm/kasan/report.c:221 [inline]
[<ffffffff80474a22>] describe_object mm/kasan/report.c:231 [inline]
[<ffffffff80474a22>] print_address_description.constprop.0+0x2ae/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
[<ffffffff8010dd9a>] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708
[<ffffffff8010e52a>] __bfs_forwards kernel/locking/lockdep.c:1803 [inline]
[<ffffffff8010e52a>] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104
[<ffffffff8010f95c>] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131
[<ffffffff80113c26>] check_prev_add kernel/locking/lockdep.c:3063 [inline]
[<ffffffff80113c26>] check_prevs_add kernel/locking/lockdep.c:3186 [inline]
[<ffffffff80113c26>] validate_chain kernel/locking/lockdep.c:3801 [inline]
[<ffffffff80113c26>] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027
[<ffffffff80116582>] lock_acquire.part.0+0x1d0/0x424 kernel/locking/lockdep.c:5639
[<ffffffff8011682a>] lock_acquire+0x54/0x6a kernel/locking/lockdep.c:5612
[<ffffffff80416d44>] local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
[<ffffffff80416d44>] rmqueue_pcplist mm/page_alloc.c:3660 [inline]
[<ffffffff80416d44>] rmqueue mm/page_alloc.c:3698 [inline]
[<ffffffff80416d44>] get_page_from_freelist+0xbc2/0x12d8 mm/page_alloc.c:4162
irq event stamp: 59335
hardirqs last  enabled at (59334): [<ffffffff831afd54>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (59334): [<ffffffff831afd54>] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194
hardirqs last disabled at (59335): [<ffffffff80417140>] rmqueue_pcplist mm/page_alloc.c:3660 [inline]
hardirqs last disabled at (59335): [<ffffffff80417140>] rmqueue mm/page_alloc.c:3698 [inline]
hardirqs last disabled at (59335): [<ffffffff80417140>] get_page_from_freelist+0xfbe/0x12d8 mm/page_alloc.c:4162
softirqs last  enabled at (59218): [<ffffffff831b0bd0>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (59218): [<ffffffff831b0bd0>] __do_softirq+0x618/0x8fc kernel/softirq.c:587
softirqs last disabled at (59249): [<ffffffff80061288>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (59249): [<ffffffff80061288>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (59249): [<ffffffff80061288>] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637
---[ end trace 0000000000000000 ]---

The buggy address belongs to the object at ffffaf800c2ff800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 240 bytes to the right of
 512-byte region [ffffaf800c2ff800, ffffaf800c2ffa00)
The buggy address belongs to the page:
page:ffffaf807a9b66e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c4fc
head:ffffaf807a9b66e0 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x8800010200(slab|head|section=17|node=0|zone=0)
raw: 0000008800010200 ffffaf807aa6c9c0 0000000000000002 ffffaf8007201c80
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
raw: 00000000000007ff
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 367, ts 243075068400, 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_pages+0x132/0x2a6 mm/mempolicy.c:2271
 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]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc_trace+0x2a2/0x2e0 mm/slub.c:3255
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 alloc_bprm+0x48/0x4b6 fs/exec.c:1507
 kernel_execve+0x54/0x288 fs/exec.c:1947
 call_usermodehelper_exec_async+0x1c0/0x2dc kernel/umh.c:112
 ret_from_exception+0x0/0x10
page_owner free stack trace missing

Memory state around the buggy address:
 ffffaf800c2ff980: fc fc fc fc f1 f1 f1 f1 00 f3 f3 f3 fc fc fc fc
 ffffaf800c2ffa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffffaf800c2ffa80: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 fc fc fc fc
                                                             ^
 ffffaf800c2ffb00: 00 00 00 f3 f3 f3 f3 f3 fc fc fc fc fc fc fc fc
 ffffaf800c2ffb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================