Date
July 17, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.782976] ================================================================== [ 16.783046] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 16.783104] Read of size 1 at addr fff00000c7848f28 by task kunit_try_catch/188 [ 16.783373] [ 16.783449] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.783536] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.783564] Hardware name: linux,dummy-virt (DT) [ 16.783603] Call trace: [ 16.783653] show_stack+0x20/0x38 (C) [ 16.783767] dump_stack_lvl+0x8c/0xd0 [ 16.783852] print_report+0x118/0x5d0 [ 16.784017] kasan_report+0xdc/0x128 [ 16.784095] __asan_report_load1_noabort+0x20/0x30 [ 16.784159] kmalloc_uaf2+0x3f4/0x468 [ 16.784321] kunit_try_run_case+0x170/0x3f0 [ 16.784370] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.784423] kthread+0x328/0x630 [ 16.784464] ret_from_fork+0x10/0x20 [ 16.785033] [ 16.785107] Allocated by task 188: [ 16.785174] kasan_save_stack+0x3c/0x68 [ 16.785325] kasan_save_track+0x20/0x40 [ 16.785527] kasan_save_alloc_info+0x40/0x58 [ 16.785597] __kasan_kmalloc+0xd4/0xd8 [ 16.785729] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.785770] kmalloc_uaf2+0xc4/0x468 [ 16.785991] kunit_try_run_case+0x170/0x3f0 [ 16.786193] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.786343] kthread+0x328/0x630 [ 16.786478] ret_from_fork+0x10/0x20 [ 16.786636] [ 16.786712] Freed by task 188: [ 16.786845] kasan_save_stack+0x3c/0x68 [ 16.786970] kasan_save_track+0x20/0x40 [ 16.787026] kasan_save_free_info+0x4c/0x78 [ 16.787321] __kasan_slab_free+0x6c/0x98 [ 16.787463] kfree+0x214/0x3c8 [ 16.787622] kmalloc_uaf2+0x134/0x468 [ 16.787724] kunit_try_run_case+0x170/0x3f0 [ 16.788178] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.788336] kthread+0x328/0x630 [ 16.788408] ret_from_fork+0x10/0x20 [ 16.788445] [ 16.788466] The buggy address belongs to the object at fff00000c7848f00 [ 16.788466] which belongs to the cache kmalloc-64 of size 64 [ 16.788528] The buggy address is located 40 bytes inside of [ 16.788528] freed 64-byte region [fff00000c7848f00, fff00000c7848f40) [ 16.788823] [ 16.789002] The buggy address belongs to the physical page: [ 16.789147] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107848 [ 16.789250] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.789398] page_type: f5(slab) [ 16.789554] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.789643] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.789684] page dumped because: kasan: bad access detected [ 16.789979] [ 16.790017] Memory state around the buggy address: [ 16.790051] fff00000c7848e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.790425] fff00000c7848e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.790531] >fff00000c7848f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.790645] ^ [ 16.790782] fff00000c7848f80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 16.790910] fff00000c7849000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.790978] ==================================================================
[ 12.578307] ================================================================== [ 12.578811] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 12.579192] Read of size 1 at addr ffff888102f441a8 by task kunit_try_catch/205 [ 12.579587] [ 12.579710] CPU: 0 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.579757] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.579769] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.579790] Call Trace: [ 12.579802] <TASK> [ 12.579821] dump_stack_lvl+0x73/0xb0 [ 12.579852] print_report+0xd1/0x610 [ 12.579874] ? __virt_addr_valid+0x1db/0x2d0 [ 12.579898] ? kmalloc_uaf2+0x4a8/0x520 [ 12.579917] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.579939] ? kmalloc_uaf2+0x4a8/0x520 [ 12.579959] kasan_report+0x141/0x180 [ 12.579980] ? kmalloc_uaf2+0x4a8/0x520 [ 12.580005] __asan_report_load1_noabort+0x18/0x20 [ 12.580065] kmalloc_uaf2+0x4a8/0x520 [ 12.580085] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.580104] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.580136] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.580162] kunit_try_run_case+0x1a5/0x480 [ 12.580188] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.580210] ? _raw_spin_lock_irqsave+0xf9/0x100 [ 12.580235] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.580276] ? __kthread_parkme+0x82/0x180 [ 12.580297] ? preempt_count_sub+0x50/0x80 [ 12.580337] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.580360] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.580383] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.580406] kthread+0x337/0x6f0 [ 12.580424] ? trace_preempt_on+0x20/0xc0 [ 12.580448] ? __pfx_kthread+0x10/0x10 [ 12.580467] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.580488] ? calculate_sigpending+0x7b/0xa0 [ 12.580513] ? __pfx_kthread+0x10/0x10 [ 12.580533] ret_from_fork+0x116/0x1d0 [ 12.580552] ? __pfx_kthread+0x10/0x10 [ 12.580572] ret_from_fork_asm+0x1a/0x30 [ 12.580616] </TASK> [ 12.580626] [ 12.592224] Allocated by task 205: [ 12.592408] kasan_save_stack+0x45/0x70 [ 12.592793] kasan_save_track+0x18/0x40 [ 12.593163] kasan_save_alloc_info+0x3b/0x50 [ 12.593373] __kasan_kmalloc+0xb7/0xc0 [ 12.593550] __kmalloc_cache_noprof+0x189/0x420 [ 12.594261] kmalloc_uaf2+0xc6/0x520 [ 12.594503] kunit_try_run_case+0x1a5/0x480 [ 12.594976] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.595248] kthread+0x337/0x6f0 [ 12.595404] ret_from_fork+0x116/0x1d0 [ 12.595580] ret_from_fork_asm+0x1a/0x30 [ 12.595765] [ 12.596159] Freed by task 205: [ 12.596439] kasan_save_stack+0x45/0x70 [ 12.597113] kasan_save_track+0x18/0x40 [ 12.597368] kasan_save_free_info+0x3f/0x60 [ 12.597699] __kasan_slab_free+0x56/0x70 [ 12.598045] kfree+0x222/0x3f0 [ 12.598221] kmalloc_uaf2+0x14c/0x520 [ 12.598397] kunit_try_run_case+0x1a5/0x480 [ 12.598588] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.599163] kthread+0x337/0x6f0 [ 12.599459] ret_from_fork+0x116/0x1d0 [ 12.599781] ret_from_fork_asm+0x1a/0x30 [ 12.600222] [ 12.600442] The buggy address belongs to the object at ffff888102f44180 [ 12.600442] which belongs to the cache kmalloc-64 of size 64 [ 12.601534] The buggy address is located 40 bytes inside of [ 12.601534] freed 64-byte region [ffff888102f44180, ffff888102f441c0) [ 12.602565] [ 12.602674] The buggy address belongs to the physical page: [ 12.603306] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f44 [ 12.604094] flags: 0x200000000000000(node=0|zone=2) [ 12.604335] page_type: f5(slab) [ 12.604494] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.605164] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.605622] page dumped because: kasan: bad access detected [ 12.605991] [ 12.606230] Memory state around the buggy address: [ 12.606457] ffff888102f44080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.607072] ffff888102f44100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.607542] >ffff888102f44180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.608161] ^ [ 12.608368] ffff888102f44200: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 12.609180] ffff888102f44280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.609583] ==================================================================