Hay
Date
Feb. 5, 2025, 2:09 p.m.

Environment
qemu-arm64

[  182.700220] ==================================================================
[  182.702221] BUG: KASAN: slab-use-after-free in kasan_strings+0x150/0x478
[  182.704516] Read of size 1 at addr ffff0000c5f6ec10 by task kunit_try_catch/204
[  182.706614] 
[  182.707343] CPU: 1 PID: 204 Comm: kunit_try_catch Tainted: G    B            N 6.6.76-rc1 #1
[  182.709201] Hardware name: linux,dummy-virt (DT)
[  182.710354] Call trace:
[  182.711116]  dump_backtrace+0x9c/0x128
[  182.712228]  show_stack+0x20/0x38
[  182.713243]  dump_stack_lvl+0x60/0xb0
[  182.714425]  print_report+0xf8/0x5d8
[  182.715538]  kasan_report+0xc8/0x118
[  182.716697]  __asan_load1+0x60/0x70
[  182.717833]  kasan_strings+0x150/0x478
[  182.718955]  kunit_try_run_case+0xf8/0x260
[  182.720177]  kunit_generic_run_threadfn_adapter+0x38/0x60
[  182.721661]  kthread+0x18c/0x1a8
[  182.722659]  ret_from_fork+0x10/0x20
[  182.723762] 
[  182.724345] Allocated by task 204:
[  182.725236]  kasan_save_stack+0x3c/0x68
[  182.726402]  kasan_set_track+0x2c/0x40
[  182.727541]  kasan_save_alloc_info+0x24/0x38
[  182.728812]  __kasan_kmalloc+0xd4/0xd8
[  182.729989]  kmalloc_trace+0x68/0x130
[  182.731064]  kasan_strings+0xa0/0x478
[  182.732100]  kunit_try_run_case+0xf8/0x260
[  182.733277]  kunit_generic_run_threadfn_adapter+0x38/0x60
[  182.734723]  kthread+0x18c/0x1a8
[  182.735669]  ret_from_fork+0x10/0x20
[  182.736727] 
[  182.737258] Freed by task 204:
[  182.738101]  kasan_save_stack+0x3c/0x68
[  182.739228]  kasan_set_track+0x2c/0x40
[  182.740345]  kasan_save_free_info+0x38/0x60
[  182.741587]  __kasan_slab_free+0x100/0x170
[  182.742793]  __kmem_cache_free+0x170/0x2e0
[  182.743993]  kfree+0x74/0x138
[  182.744920]  kasan_strings+0xbc/0x478
[  182.745979]  kunit_try_run_case+0xf8/0x260
[  182.747168]  kunit_generic_run_threadfn_adapter+0x38/0x60
[  182.748615]  kthread+0x18c/0x1a8
[  182.749538]  ret_from_fork+0x10/0x20
[  182.750641] 
[  182.751123] The buggy address belongs to the object at ffff0000c5f6ec00
[  182.751123]  which belongs to the cache kmalloc-32 of size 32
[  182.753456] The buggy address is located 16 bytes inside of
[  182.753456]  freed 32-byte region [ffff0000c5f6ec00, ffff0000c5f6ec20)
[  182.755740] 
[  182.756329] The buggy address belongs to the physical page:
[  182.757619] page:00000000e8269612 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105f6e
[  182.759466] flags: 0xbfffc0000000800(slab|node=0|zone=2|lastcpupid=0xffff)
[  182.761042] page_type: 0xffffffff()
[  182.762059] raw: 0bfffc0000000800 ffff0000c0001500 dead000000000122 0000000000000000
[  182.763720] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000
[  182.765288] page dumped because: kasan: bad access detected
[  182.766526] 
[  182.767066] Memory state around the buggy address:
[  182.768290]  ffff0000c5f6eb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[  182.769901]  ffff0000c5f6eb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[  182.771467] >ffff0000c5f6ec00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
[  182.772982]                          ^
[  182.773987]  ffff0000c5f6ec80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  182.775534]  ffff0000c5f6ed00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  182.777093] ==================================================================