Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.497241] ================================================================== [ 19.497402] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 19.497539] Write of size 33 at addr fff00000c640be00 by task kunit_try_catch/195 [ 19.497668] [ 19.497755] CPU: 0 UID: 0 PID: 195 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 19.497979] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.498055] Hardware name: linux,dummy-virt (DT) [ 19.498140] Call trace: [ 19.498202] show_stack+0x20/0x38 (C) [ 19.498325] dump_stack_lvl+0x8c/0xd0 [ 19.498446] print_report+0x118/0x608 [ 19.498560] kasan_report+0xdc/0x128 [ 19.498682] kasan_check_range+0x100/0x1a8 [ 19.498883] __asan_memset+0x34/0x78 [ 19.498993] kmalloc_uaf_memset+0x170/0x310 [ 19.499096] kunit_try_run_case+0x170/0x3f0 [ 19.499209] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.499327] kthread+0x328/0x630 [ 19.499434] ret_from_fork+0x10/0x20 [ 19.499548] [ 19.499612] Allocated by task 195: [ 19.499704] kasan_save_stack+0x3c/0x68 [ 19.499798] kasan_save_track+0x20/0x40 [ 19.499940] kasan_save_alloc_info+0x40/0x58 [ 19.500065] __kasan_kmalloc+0xd4/0xd8 [ 19.500194] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.500295] kmalloc_uaf_memset+0xb8/0x310 [ 19.500415] kunit_try_run_case+0x170/0x3f0 [ 19.500530] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.500660] kthread+0x328/0x630 [ 19.500759] ret_from_fork+0x10/0x20 [ 19.500896] [ 19.500939] Freed by task 195: [ 19.500997] kasan_save_stack+0x3c/0x68 [ 19.501074] kasan_save_track+0x20/0x40 [ 19.501155] kasan_save_free_info+0x4c/0x78 [ 19.501236] __kasan_slab_free+0x6c/0x98 [ 19.501356] kfree+0x214/0x3c8 [ 19.501451] kmalloc_uaf_memset+0x11c/0x310 [ 19.501552] kunit_try_run_case+0x170/0x3f0 [ 19.501658] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.501759] kthread+0x328/0x630 [ 19.501870] ret_from_fork+0x10/0x20 [ 19.501961] [ 19.502010] The buggy address belongs to the object at fff00000c640be00 [ 19.502010] which belongs to the cache kmalloc-64 of size 64 [ 19.502156] The buggy address is located 0 bytes inside of [ 19.502156] freed 64-byte region [fff00000c640be00, fff00000c640be40) [ 19.502288] [ 19.502370] The buggy address belongs to the physical page: [ 19.502425] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10640b [ 19.502501] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.502570] page_type: f5(slab) [ 19.502628] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.502692] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.502747] page dumped because: kasan: bad access detected [ 19.502785] [ 19.502811] Memory state around the buggy address: [ 19.502887] fff00000c640bd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.503001] fff00000c640bd80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.503161] >fff00000c640be00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.503347] ^ [ 19.503426] fff00000c640be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.503544] fff00000c640bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.503650] ==================================================================
[ 11.725310] ================================================================== [ 11.725732] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.726022] Write of size 33 at addr ffff888102a1ee00 by task kunit_try_catch/211 [ 11.726277] [ 11.726365] CPU: 0 UID: 0 PID: 211 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 11.726422] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.726434] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.726456] Call Trace: [ 11.726469] <TASK> [ 11.726488] dump_stack_lvl+0x73/0xb0 [ 11.726516] print_report+0xd1/0x650 [ 11.726537] ? __virt_addr_valid+0x1db/0x2d0 [ 11.726560] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.726579] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.726600] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.726620] kasan_report+0x141/0x180 [ 11.726640] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.726664] kasan_check_range+0x10c/0x1c0 [ 11.726687] __asan_memset+0x27/0x50 [ 11.726706] kmalloc_uaf_memset+0x1a3/0x360 [ 11.726727] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.726781] ? __schedule+0x10cc/0x2b60 [ 11.726904] ? __pfx_read_tsc+0x10/0x10 [ 11.726925] ? ktime_get_ts64+0x86/0x230 [ 11.726962] kunit_try_run_case+0x1a5/0x480 [ 11.726986] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.727007] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.727027] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.727049] ? __kthread_parkme+0x82/0x180 [ 11.727069] ? preempt_count_sub+0x50/0x80 [ 11.727092] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.727114] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.727135] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.727156] kthread+0x337/0x6f0 [ 11.727175] ? trace_preempt_on+0x20/0xc0 [ 11.727199] ? __pfx_kthread+0x10/0x10 [ 11.727219] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.727238] ? calculate_sigpending+0x7b/0xa0 [ 11.727261] ? __pfx_kthread+0x10/0x10 [ 11.727282] ret_from_fork+0x116/0x1d0 [ 11.727299] ? __pfx_kthread+0x10/0x10 [ 11.727318] ret_from_fork_asm+0x1a/0x30 [ 11.727347] </TASK> [ 11.727360] [ 11.737593] Allocated by task 211: [ 11.737793] kasan_save_stack+0x45/0x70 [ 11.738003] kasan_save_track+0x18/0x40 [ 11.738166] kasan_save_alloc_info+0x3b/0x50 [ 11.738368] __kasan_kmalloc+0xb7/0xc0 [ 11.738630] __kmalloc_cache_noprof+0x189/0x420 [ 11.738852] kmalloc_uaf_memset+0xa9/0x360 [ 11.739069] kunit_try_run_case+0x1a5/0x480 [ 11.739214] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.739377] kthread+0x337/0x6f0 [ 11.739567] ret_from_fork+0x116/0x1d0 [ 11.739779] ret_from_fork_asm+0x1a/0x30 [ 11.740113] [ 11.740240] Freed by task 211: [ 11.740574] kasan_save_stack+0x45/0x70 [ 11.740850] kasan_save_track+0x18/0x40 [ 11.741053] kasan_save_free_info+0x3f/0x60 [ 11.741248] __kasan_slab_free+0x56/0x70 [ 11.741549] kfree+0x222/0x3f0 [ 11.741736] kmalloc_uaf_memset+0x12b/0x360 [ 11.741966] kunit_try_run_case+0x1a5/0x480 [ 11.742166] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.742486] kthread+0x337/0x6f0 [ 11.742660] ret_from_fork+0x116/0x1d0 [ 11.742783] ret_from_fork_asm+0x1a/0x30 [ 11.742909] [ 11.742985] The buggy address belongs to the object at ffff888102a1ee00 [ 11.742985] which belongs to the cache kmalloc-64 of size 64 [ 11.743718] The buggy address is located 0 bytes inside of [ 11.743718] freed 64-byte region [ffff888102a1ee00, ffff888102a1ee40) [ 11.744078] [ 11.744144] The buggy address belongs to the physical page: [ 11.744303] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a1e [ 11.744597] flags: 0x200000000000000(node=0|zone=2) [ 11.744850] page_type: f5(slab) [ 11.745125] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.745462] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.746145] page dumped because: kasan: bad access detected [ 11.747060] [ 11.747314] Memory state around the buggy address: [ 11.747567] ffff888102a1ed00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.747983] ffff888102a1ed80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.748397] >ffff888102a1ee00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.748959] ^ [ 11.749132] ffff888102a1ee80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.749430] ffff888102a1ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.750158] ==================================================================