Date
Feb. 5, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-armv7 | |
| qemu-x86_64 |
[ 147.839008] ================================================================== [ 147.840706] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0xd0/0x1cc [ 147.841494] Read of size 1 at addr c8fbdb00 by task kunit_try_catch/205 [ 147.842152] [ 147.842376] CPU: 1 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 147.843248] Hardware name: Generic DT based system [ 147.843778] unwind_backtrace from show_stack+0x18/0x1c [ 147.844523] show_stack from dump_stack_lvl+0x58/0x70 [ 147.845107] dump_stack_lvl from print_report+0x164/0x51c [ 147.845900] print_report from kasan_report+0xc8/0x104 [ 147.846880] kasan_report from __kasan_check_byte+0x34/0x3c [ 147.847764] __kasan_check_byte from kfree_sensitive+0x20/0x6c [ 147.848632] kfree_sensitive from kmalloc_double_kzfree+0xd0/0x1cc [ 147.849402] kmalloc_double_kzfree from kunit_try_run_case+0x11c/0x2e4 [ 147.850475] kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.851561] kunit_generic_run_threadfn_adapter from kthread+0x184/0x1a8 [ 147.852478] kthread from ret_from_fork+0x14/0x30 [ 147.853146] Exception stack(0xfa123fb0 to 0xfa123ff8) [ 147.853778] 3fa0: 00000000 00000000 00000000 00000000 [ 147.854617] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 147.856010] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 147.857068] [ 147.857354] Allocated by task 205: [ 147.857806] kasan_set_track+0x3c/0x5c [ 147.858490] __kasan_kmalloc+0x8c/0x94 [ 147.859169] kmalloc_double_kzfree+0xa0/0x1cc [ 147.859794] kunit_try_run_case+0x11c/0x2e4 [ 147.860471] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.861352] kthread+0x184/0x1a8 [ 147.861867] ret_from_fork+0x14/0x30 [ 147.862335] [ 147.862669] Freed by task 205: [ 147.863334] kasan_set_track+0x3c/0x5c [ 147.863841] kasan_save_free_info+0x30/0x3c [ 147.864708] __kasan_slab_free+0xdc/0x124 [ 147.865327] __kmem_cache_free+0x140/0x2a8 [ 147.866200] kmalloc_double_kzfree+0xbc/0x1cc [ 147.866745] kunit_try_run_case+0x11c/0x2e4 [ 147.867442] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.868122] kthread+0x184/0x1a8 [ 147.868584] ret_from_fork+0x14/0x30 [ 147.869189] [ 147.869445] The buggy address belongs to the object at c8fbdb00 [ 147.869445] which belongs to the cache kmalloc-64 of size 64 [ 147.870686] The buggy address is located 0 bytes inside of [ 147.870686] freed 64-byte region [c8fbdb00, c8fbdb40) [ 147.871901] [ 147.872172] The buggy address belongs to the physical page: [ 147.872876] page:652e16b7 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x48fbd [ 147.873995] flags: 0x800(slab|zone=0) [ 147.874472] page_type: 0xffffffff() [ 147.875037] raw: 00000800 c4801200 00000122 00000000 00000000 80200020 ffffffff 00000001 [ 147.875951] raw: 00000000 [ 147.876502] page dumped because: kasan: bad access detected [ 147.877548] [ 147.877861] Memory state around the buggy address: [ 147.878498] c8fbda00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.879243] c8fbda80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.880018] >c8fbdb00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.880741] ^ [ 147.881047] c8fbdb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 147.881793] c8fbdc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 147.882557] ==================================================================
[ 51.640284] ================================================================== [ 51.641296] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0xd4/0x1d0 [ 51.641659] Read of size 1 at addr ffff888101a81400 by task kunit_try_catch/228 [ 51.642495] [ 51.643296] CPU: 0 PID: 228 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 51.645110] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 51.646133] Call Trace: [ 51.646541] <TASK> [ 51.646921] dump_stack_lvl+0x4e/0x90 [ 51.647633] print_report+0xd2/0x660 [ 51.649045] ? __virt_addr_valid+0x156/0x1e0 [ 51.649559] ? kasan_complete_mode_report_info+0x64/0x200 [ 51.650335] kasan_report+0xff/0x140 [ 51.650993] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 51.651517] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 51.652361] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 51.653065] __kasan_check_byte+0x3d/0x50 [ 51.653665] kfree_sensitive+0x22/0x90 [ 51.654363] kmalloc_double_kzfree+0xd4/0x1d0 [ 51.655002] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 51.655778] ? __schedule+0x70b/0x1190 [ 51.656270] ? ktime_get_ts64+0x118/0x140 [ 51.656926] kunit_try_run_case+0x126/0x290 [ 51.657575] ? __pfx_kunit_try_run_case+0x10/0x10 [ 51.658794] ? __kasan_check_write+0x18/0x20 [ 51.659407] ? trace_preempt_on+0x20/0xa0 [ 51.660045] ? __kthread_parkme+0x4f/0xd0 [ 51.660631] ? preempt_count_sub+0x50/0x80 [ 51.661282] ? __pfx_kunit_try_run_case+0x10/0x10 [ 51.662103] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 51.663304] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 51.663944] kthread+0x19e/0x1e0 [ 51.664473] ? __pfx_kthread+0x10/0x10 [ 51.665008] ret_from_fork+0x41/0x70 [ 51.665609] ? __pfx_kthread+0x10/0x10 [ 51.666206] ret_from_fork_asm+0x1b/0x30 [ 51.666866] </TASK> [ 51.667362] [ 51.667640] Allocated by task 228: [ 51.668805] kasan_save_stack+0x3c/0x60 [ 51.669302] kasan_set_track+0x29/0x40 [ 51.669717] kasan_save_alloc_info+0x22/0x30 [ 51.670193] __kasan_kmalloc+0xb7/0xc0 [ 51.670593] kmalloc_trace+0x4c/0xb0 [ 51.671432] kmalloc_double_kzfree+0x9d/0x1d0 [ 51.672402] kunit_try_run_case+0x126/0x290 [ 51.673262] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 51.674122] kthread+0x19e/0x1e0 [ 51.674503] ret_from_fork+0x41/0x70 [ 51.674990] ret_from_fork_asm+0x1b/0x30 [ 51.676274] [ 51.676494] Freed by task 228: [ 51.676793] kasan_save_stack+0x3c/0x60 [ 51.677368] kasan_set_track+0x29/0x40 [ 51.678535] kasan_save_free_info+0x2f/0x50 [ 51.679187] ____kasan_slab_free+0x172/0x1d0 [ 51.679826] __kasan_slab_free+0x16/0x20 [ 51.680286] __kmem_cache_free+0x190/0x310 [ 51.681447] kfree+0x7c/0x120 [ 51.681875] kfree_sensitive+0x67/0x90 [ 51.682356] kmalloc_double_kzfree+0xbd/0x1d0 [ 51.682998] kunit_try_run_case+0x126/0x290 [ 51.683567] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 51.684359] kthread+0x19e/0x1e0 [ 51.685549] ret_from_fork+0x41/0x70 [ 51.686018] ret_from_fork_asm+0x1b/0x30 [ 51.686775] [ 51.687035] The buggy address belongs to the object at ffff888101a81400 [ 51.687035] which belongs to the cache kmalloc-16 of size 16 [ 51.688181] The buggy address is located 0 bytes inside of [ 51.688181] freed 16-byte region [ffff888101a81400, ffff888101a81410) [ 51.690277] [ 51.690493] The buggy address belongs to the physical page: [ 51.691567] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a81 [ 51.692520] flags: 0x200000000000800(slab|node=0|zone=2) [ 51.693283] page_type: 0xffffffff() [ 51.693702] raw: 0200000000000800 ffff8881000413c0 dead000000000122 0000000000000000 [ 51.694411] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 [ 51.695438] page dumped because: kasan: bad access detected [ 51.696415] [ 51.696627] Memory state around the buggy address: [ 51.697619] ffff888101a81300: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 51.698502] ffff888101a81380: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 51.699552] >ffff888101a81400: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.700271] ^ [ 51.700923] ffff888101a81480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.702314] ffff888101a81500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.702828] ==================================================================