Date
July 17, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.757251] ================================================================== [ 16.757348] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 16.757411] Read of size 1 at addr fff00000c3e55168 by task kunit_try_catch/184 [ 16.757458] [ 16.757497] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.757579] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.757616] Hardware name: linux,dummy-virt (DT) [ 16.757648] Call trace: [ 16.757682] show_stack+0x20/0x38 (C) [ 16.757730] dump_stack_lvl+0x8c/0xd0 [ 16.757779] print_report+0x118/0x5d0 [ 16.757833] kasan_report+0xdc/0x128 [ 16.757890] __asan_report_load1_noabort+0x20/0x30 [ 16.757941] kmalloc_uaf+0x300/0x338 [ 16.757983] kunit_try_run_case+0x170/0x3f0 [ 16.758031] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.758080] kthread+0x328/0x630 [ 16.758122] ret_from_fork+0x10/0x20 [ 16.758169] [ 16.758188] Allocated by task 184: [ 16.758223] kasan_save_stack+0x3c/0x68 [ 16.758272] kasan_save_track+0x20/0x40 [ 16.758310] kasan_save_alloc_info+0x40/0x58 [ 16.758350] __kasan_kmalloc+0xd4/0xd8 [ 16.758386] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.758436] kmalloc_uaf+0xb8/0x338 [ 16.758474] kunit_try_run_case+0x170/0x3f0 [ 16.758510] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.758561] kthread+0x328/0x630 [ 16.758594] ret_from_fork+0x10/0x20 [ 16.758628] [ 16.758648] Freed by task 184: [ 16.758672] kasan_save_stack+0x3c/0x68 [ 16.758709] kasan_save_track+0x20/0x40 [ 16.758744] kasan_save_free_info+0x4c/0x78 [ 16.758799] __kasan_slab_free+0x6c/0x98 [ 16.758836] kfree+0x214/0x3c8 [ 16.758877] kmalloc_uaf+0x11c/0x338 [ 16.758912] kunit_try_run_case+0x170/0x3f0 [ 16.758948] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.759248] kthread+0x328/0x630 [ 16.759427] ret_from_fork+0x10/0x20 [ 16.759618] [ 16.759645] The buggy address belongs to the object at fff00000c3e55160 [ 16.759645] which belongs to the cache kmalloc-16 of size 16 [ 16.760065] The buggy address is located 8 bytes inside of [ 16.760065] freed 16-byte region [fff00000c3e55160, fff00000c3e55170) [ 16.760316] [ 16.760372] The buggy address belongs to the physical page: [ 16.760447] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103e55 [ 16.760551] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.760664] page_type: f5(slab) [ 16.760757] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.760858] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.760913] page dumped because: kasan: bad access detected [ 16.760944] [ 16.760962] Memory state around the buggy address: [ 16.760996] fff00000c3e55000: 00 06 fc fc 00 06 fc fc 00 02 fc fc 00 06 fc fc [ 16.761038] fff00000c3e55080: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.761227] >fff00000c3e55100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.761311] ^ [ 16.761414] fff00000c3e55180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.761492] fff00000c3e55200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.761609] ==================================================================
[ 12.506655] ================================================================== [ 12.507109] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.507334] Read of size 1 at addr ffff8881022efca8 by task kunit_try_catch/201 [ 12.507558] [ 12.507652] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.507699] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.507710] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.507732] Call Trace: [ 12.507743] <TASK> [ 12.507760] dump_stack_lvl+0x73/0xb0 [ 12.507788] print_report+0xd1/0x610 [ 12.507808] ? __virt_addr_valid+0x1db/0x2d0 [ 12.507831] ? kmalloc_uaf+0x320/0x380 [ 12.507848] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.507869] ? kmalloc_uaf+0x320/0x380 [ 12.507888] kasan_report+0x141/0x180 [ 12.507908] ? kmalloc_uaf+0x320/0x380 [ 12.507933] __asan_report_load1_noabort+0x18/0x20 [ 12.507955] kmalloc_uaf+0x320/0x380 [ 12.507973] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.507993] ? __schedule+0x10cc/0x2b60 [ 12.508015] ? __pfx_read_tsc+0x10/0x10 [ 12.508035] ? ktime_get_ts64+0x86/0x230 [ 12.508102] kunit_try_run_case+0x1a5/0x480 [ 12.508129] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.508151] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.508175] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.508198] ? __kthread_parkme+0x82/0x180 [ 12.508219] ? preempt_count_sub+0x50/0x80 [ 12.508244] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.508267] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.508290] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.508313] kthread+0x337/0x6f0 [ 12.508332] ? trace_preempt_on+0x20/0xc0 [ 12.508355] ? __pfx_kthread+0x10/0x10 [ 12.508376] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.508397] ? calculate_sigpending+0x7b/0xa0 [ 12.508421] ? __pfx_kthread+0x10/0x10 [ 12.508442] ret_from_fork+0x116/0x1d0 [ 12.508460] ? __pfx_kthread+0x10/0x10 [ 12.508480] ret_from_fork_asm+0x1a/0x30 [ 12.508512] </TASK> [ 12.508523] [ 12.522039] Allocated by task 201: [ 12.522515] kasan_save_stack+0x45/0x70 [ 12.522991] kasan_save_track+0x18/0x40 [ 12.523385] kasan_save_alloc_info+0x3b/0x50 [ 12.523852] __kasan_kmalloc+0xb7/0xc0 [ 12.524242] __kmalloc_cache_noprof+0x189/0x420 [ 12.524718] kmalloc_uaf+0xaa/0x380 [ 12.525161] kunit_try_run_case+0x1a5/0x480 [ 12.525590] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.526167] kthread+0x337/0x6f0 [ 12.526513] ret_from_fork+0x116/0x1d0 [ 12.526932] ret_from_fork_asm+0x1a/0x30 [ 12.527421] [ 12.527605] Freed by task 201: [ 12.527980] kasan_save_stack+0x45/0x70 [ 12.528332] kasan_save_track+0x18/0x40 [ 12.528732] kasan_save_free_info+0x3f/0x60 [ 12.529182] __kasan_slab_free+0x56/0x70 [ 12.529369] kfree+0x222/0x3f0 [ 12.529489] kmalloc_uaf+0x12c/0x380 [ 12.529808] kunit_try_run_case+0x1a5/0x480 [ 12.530291] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.530906] kthread+0x337/0x6f0 [ 12.531243] ret_from_fork+0x116/0x1d0 [ 12.531539] ret_from_fork_asm+0x1a/0x30 [ 12.532009] [ 12.532124] The buggy address belongs to the object at ffff8881022efca0 [ 12.532124] which belongs to the cache kmalloc-16 of size 16 [ 12.532485] The buggy address is located 8 bytes inside of [ 12.532485] freed 16-byte region [ffff8881022efca0, ffff8881022efcb0) [ 12.533662] [ 12.533879] The buggy address belongs to the physical page: [ 12.534433] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022ef [ 12.535378] flags: 0x200000000000000(node=0|zone=2) [ 12.536134] page_type: f5(slab) [ 12.536425] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.536976] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.537407] page dumped because: kasan: bad access detected [ 12.537600] [ 12.537834] Memory state around the buggy address: [ 12.538396] ffff8881022efb80: 00 04 fc fc 00 04 fc fc 00 01 fc fc 00 01 fc fc [ 12.539067] ffff8881022efc00: 00 04 fc fc 00 04 fc fc 00 05 fc fc fa fb fc fc [ 12.539695] >ffff8881022efc80: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.540335] ^ [ 12.540498] ffff8881022efd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.541152] ffff8881022efd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.541814] ==================================================================