Date
Feb. 5, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-armv7 | |
| qemu-x86_64 |
[ 145.711016] ================================================================== [ 145.712305] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x104/0x274 [ 145.712998] Read of size 1 at addr c4fcfd28 by task kunit_try_catch/161 [ 145.713844] [ 145.714212] CPU: 0 PID: 161 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 145.715045] Hardware name: Generic DT based system [ 145.716231] unwind_backtrace from show_stack+0x18/0x1c [ 145.716947] show_stack from dump_stack_lvl+0x58/0x70 [ 145.717619] dump_stack_lvl from print_report+0x164/0x51c [ 145.718266] print_report from kasan_report+0xc8/0x104 [ 145.719034] kasan_report from kmalloc_uaf2+0x104/0x274 [ 145.719733] kmalloc_uaf2 from kunit_try_run_case+0x11c/0x2e4 [ 145.720444] kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.721547] kunit_generic_run_threadfn_adapter from kthread+0x184/0x1a8 [ 145.722494] kthread from ret_from_fork+0x14/0x30 [ 145.723095] Exception stack(0xf9ffbfb0 to 0xf9ffbff8) [ 145.723682] bfa0: 00000000 00000000 00000000 00000000 [ 145.724553] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 145.725474] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 145.727034] [ 145.727338] Allocated by task 161: [ 145.727914] kasan_set_track+0x3c/0x5c [ 145.728532] __kasan_kmalloc+0x8c/0x94 [ 145.729157] kmalloc_uaf2+0xac/0x274 [ 145.729787] kunit_try_run_case+0x11c/0x2e4 [ 145.730431] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.731270] kthread+0x184/0x1a8 [ 145.731780] ret_from_fork+0x14/0x30 [ 145.732337] [ 145.732666] Freed by task 161: [ 145.733076] kasan_set_track+0x3c/0x5c [ 145.733757] kasan_save_free_info+0x30/0x3c [ 145.734447] __kasan_slab_free+0xdc/0x124 [ 145.735008] __kmem_cache_free+0x140/0x2a8 [ 145.735537] kmalloc_uaf2+0xc0/0x274 [ 145.736710] kunit_try_run_case+0x11c/0x2e4 [ 145.737272] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 145.737975] kthread+0x184/0x1a8 [ 145.738473] ret_from_fork+0x14/0x30 [ 145.738947] [ 145.739254] The buggy address belongs to the object at c4fcfd00 [ 145.739254] which belongs to the cache kmalloc-64 of size 64 [ 145.740514] The buggy address is located 40 bytes inside of [ 145.740514] freed 64-byte region [c4fcfd00, c4fcfd40) [ 145.741669] [ 145.741986] The buggy address belongs to the physical page: [ 145.742665] page:8516b471 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x44fcf [ 145.744069] flags: 0x800(slab|zone=0) [ 145.744532] page_type: 0xffffffff() [ 145.745024] raw: 00000800 c4801200 00000122 00000000 00000000 80200020 ffffffff 00000001 [ 145.746952] raw: 00000000 [ 145.747394] page dumped because: kasan: bad access detected [ 145.748081] [ 145.748286] Memory state around the buggy address: [ 145.749194] c4fcfc00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 145.750175] c4fcfc80: 00 00 07 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 145.750837] >c4fcfd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 145.751615] ^ [ 145.752094] c4fcfd80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 145.752878] c4fcfe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 145.753574] ==================================================================
[ 48.605448] ================================================================== [ 48.606502] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x122/0x2b0 [ 48.607879] Read of size 1 at addr ffff888102849128 by task kunit_try_catch/184 [ 48.608559] [ 48.608866] CPU: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 48.609542] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 48.610505] Call Trace: [ 48.610876] <TASK> [ 48.611208] dump_stack_lvl+0x4e/0x90 [ 48.611787] print_report+0xd2/0x660 [ 48.612340] ? __virt_addr_valid+0x156/0x1e0 [ 48.612994] ? kasan_complete_mode_report_info+0x64/0x200 [ 48.613774] kasan_report+0xff/0x140 [ 48.614268] ? kmalloc_uaf2+0x122/0x2b0 [ 48.614775] ? kmalloc_uaf2+0x122/0x2b0 [ 48.615363] __asan_load1+0x66/0x70 [ 48.615926] kmalloc_uaf2+0x122/0x2b0 [ 48.616361] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 48.616992] ? sysvec_apic_timer_interrupt+0x94/0xa0 [ 48.617541] ? asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 48.618234] ? ret_from_fork_asm+0x1b/0x30 [ 48.618729] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 48.619274] ? kunit_try_run_case+0x11b/0x290 [ 48.619960] kunit_try_run_case+0x126/0x290 [ 48.620556] ? __pfx_kunit_try_run_case+0x10/0x10 [ 48.621119] ? __kasan_check_write+0x18/0x20 [ 48.621778] ? trace_preempt_on+0x20/0xa0 [ 48.622346] ? __kthread_parkme+0x4f/0xd0 [ 48.622956] ? preempt_count_sub+0x50/0x80 [ 48.623484] ? __pfx_kunit_try_run_case+0x10/0x10 [ 48.624074] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 48.624807] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.625520] kthread+0x19e/0x1e0 [ 48.626088] ? __pfx_kthread+0x10/0x10 [ 48.626565] ret_from_fork+0x41/0x70 [ 48.627162] ? __pfx_kthread+0x10/0x10 [ 48.627778] ret_from_fork_asm+0x1b/0x30 [ 48.628258] </TASK> [ 48.628607] [ 48.628937] Allocated by task 184: [ 48.629377] kasan_save_stack+0x3c/0x60 [ 48.629880] kasan_set_track+0x29/0x40 [ 48.630395] kasan_save_alloc_info+0x22/0x30 [ 48.630956] __kasan_kmalloc+0xb7/0xc0 [ 48.631474] kmalloc_trace+0x4c/0xb0 [ 48.632065] kmalloc_uaf2+0xb0/0x2b0 [ 48.632546] kunit_try_run_case+0x126/0x290 [ 48.633103] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.633869] kthread+0x19e/0x1e0 [ 48.634360] ret_from_fork+0x41/0x70 [ 48.634946] ret_from_fork_asm+0x1b/0x30 [ 48.635464] [ 48.635777] Freed by task 184: [ 48.636186] kasan_save_stack+0x3c/0x60 [ 48.636764] kasan_set_track+0x29/0x40 [ 48.637227] kasan_save_free_info+0x2f/0x50 [ 48.637784] ____kasan_slab_free+0x172/0x1d0 [ 48.638317] __kasan_slab_free+0x16/0x20 [ 48.638886] __kmem_cache_free+0x190/0x310 [ 48.639470] kfree+0x7c/0x120 [ 48.639980] kmalloc_uaf2+0xd0/0x2b0 [ 48.640421] kunit_try_run_case+0x126/0x290 [ 48.640990] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 48.641658] kthread+0x19e/0x1e0 [ 48.642136] ret_from_fork+0x41/0x70 [ 48.642625] ret_from_fork_asm+0x1b/0x30 [ 48.643227] [ 48.643510] The buggy address belongs to the object at ffff888102849100 [ 48.643510] which belongs to the cache kmalloc-64 of size 64 [ 48.644572] The buggy address is located 40 bytes inside of [ 48.644572] freed 64-byte region [ffff888102849100, ffff888102849140) [ 48.645560] [ 48.645882] The buggy address belongs to the physical page: [ 48.646494] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102849 [ 48.647475] flags: 0x200000000000800(slab|node=0|zone=2) [ 48.648066] page_type: 0xffffffff() [ 48.648555] raw: 0200000000000800 ffff888100041640 dead000000000122 0000000000000000 [ 48.649360] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 48.650134] page dumped because: kasan: bad access detected [ 48.650635] [ 48.650962] Memory state around the buggy address: [ 48.651519] ffff888102849000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 48.652215] ffff888102849080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 48.652934] >ffff888102849100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 48.653647] ^ [ 48.654095] ffff888102849180: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 48.654917] ffff888102849200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.655544] ==================================================================