Date
May 15, 2025, 10:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.145457] ================================================================== [ 18.145772] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 18.146132] Read of size 1 at addr fff00000c5ccd308 by task kunit_try_catch/184 [ 18.146690] [ 18.147052] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT [ 18.147193] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.147488] Hardware name: linux,dummy-virt (DT) [ 18.147600] Call trace: [ 18.147625] show_stack+0x20/0x38 (C) [ 18.147956] dump_stack_lvl+0x8c/0xd0 [ 18.148108] print_report+0x118/0x608 [ 18.148510] kasan_report+0xdc/0x128 [ 18.148650] __asan_report_load1_noabort+0x20/0x30 [ 18.148878] kmalloc_uaf+0x300/0x338 [ 18.149125] kunit_try_run_case+0x170/0x3f0 [ 18.149253] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.149311] kthread+0x328/0x630 [ 18.149519] ret_from_fork+0x10/0x20 [ 18.149753] [ 18.149839] Allocated by task 184: [ 18.149869] kasan_save_stack+0x3c/0x68 [ 18.150055] kasan_save_track+0x20/0x40 [ 18.150314] kasan_save_alloc_info+0x40/0x58 [ 18.150486] __kasan_kmalloc+0xd4/0xd8 [ 18.150578] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.150895] kmalloc_uaf+0xb8/0x338 [ 18.151039] kunit_try_run_case+0x170/0x3f0 [ 18.151222] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.151469] kthread+0x328/0x630 [ 18.151580] ret_from_fork+0x10/0x20 [ 18.151621] [ 18.151686] Freed by task 184: [ 18.152136] kasan_save_stack+0x3c/0x68 [ 18.152262] kasan_save_track+0x20/0x40 [ 18.152302] kasan_save_free_info+0x4c/0x78 [ 18.152406] __kasan_slab_free+0x6c/0x98 [ 18.152625] kfree+0x214/0x3c8 [ 18.152795] kmalloc_uaf+0x11c/0x338 [ 18.152966] kunit_try_run_case+0x170/0x3f0 [ 18.153095] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.153274] kthread+0x328/0x630 [ 18.153650] ret_from_fork+0x10/0x20 [ 18.153857] [ 18.153882] The buggy address belongs to the object at fff00000c5ccd300 [ 18.153882] which belongs to the cache kmalloc-16 of size 16 [ 18.153965] The buggy address is located 8 bytes inside of [ 18.153965] freed 16-byte region [fff00000c5ccd300, fff00000c5ccd310) [ 18.154302] [ 18.154479] The buggy address belongs to the physical page: [ 18.154524] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105ccd [ 18.154854] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.155012] page_type: f5(slab) [ 18.155218] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.155453] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.155540] page dumped because: kasan: bad access detected [ 18.155736] [ 18.155949] Memory state around the buggy address: [ 18.156100] fff00000c5ccd200: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 18.156343] fff00000c5ccd280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.156576] >fff00000c5ccd300: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.156686] ^ [ 18.156826] fff00000c5ccd380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.156973] fff00000c5ccd400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.157109] ==================================================================
[ 14.334777] ================================================================== [ 14.335252] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 14.335702] Read of size 1 at addr ffff8881022a34a8 by task kunit_try_catch/202 [ 14.336325] [ 14.336499] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) [ 14.336581] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.337042] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.337087] Call Trace: [ 14.337118] <TASK> [ 14.337162] dump_stack_lvl+0x73/0xb0 [ 14.337252] print_report+0xd1/0x650 [ 14.337314] ? __virt_addr_valid+0x1db/0x2d0 [ 14.337353] ? kmalloc_uaf+0x320/0x380 [ 14.337380] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.337407] ? kmalloc_uaf+0x320/0x380 [ 14.337433] kasan_report+0x141/0x180 [ 14.337466] ? kmalloc_uaf+0x320/0x380 [ 14.337561] __asan_report_load1_noabort+0x18/0x20 [ 14.337636] kmalloc_uaf+0x320/0x380 [ 14.337666] ? __pfx_kmalloc_uaf+0x10/0x10 [ 14.337693] ? __schedule+0x10cc/0x2b60 [ 14.337724] ? __pfx_read_tsc+0x10/0x10 [ 14.337751] ? ktime_get_ts64+0x86/0x230 [ 14.337782] kunit_try_run_case+0x1a5/0x480 [ 14.337814] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.337840] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.337867] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.337893] ? __kthread_parkme+0x82/0x180 [ 14.337919] ? preempt_count_sub+0x50/0x80 [ 14.337950] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.337977] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.338003] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.338030] kthread+0x337/0x6f0 [ 14.338054] ? trace_preempt_on+0x20/0xc0 [ 14.338082] ? __pfx_kthread+0x10/0x10 [ 14.338107] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.338132] ? calculate_sigpending+0x7b/0xa0 [ 14.338162] ? __pfx_kthread+0x10/0x10 [ 14.338188] ret_from_fork+0x116/0x1d0 [ 14.338211] ? __pfx_kthread+0x10/0x10 [ 14.338262] ret_from_fork_asm+0x1a/0x30 [ 14.338298] </TASK> [ 14.338311] [ 14.347725] Allocated by task 202: [ 14.347880] kasan_save_stack+0x45/0x70 [ 14.348054] kasan_save_track+0x18/0x40 [ 14.348207] kasan_save_alloc_info+0x3b/0x50 [ 14.348441] __kasan_kmalloc+0xb7/0xc0 [ 14.349043] __kmalloc_cache_noprof+0x189/0x420 [ 14.349426] kmalloc_uaf+0xaa/0x380 [ 14.350586] kunit_try_run_case+0x1a5/0x480 [ 14.351048] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.351346] kthread+0x337/0x6f0 [ 14.352643] ret_from_fork+0x116/0x1d0 [ 14.352935] ret_from_fork_asm+0x1a/0x30 [ 14.353246] [ 14.353399] Freed by task 202: [ 14.353654] kasan_save_stack+0x45/0x70 [ 14.354306] kasan_save_track+0x18/0x40 [ 14.354651] kasan_save_free_info+0x3f/0x60 [ 14.355179] __kasan_slab_free+0x56/0x70 [ 14.355502] kfree+0x222/0x3f0 [ 14.355772] kmalloc_uaf+0x12c/0x380 [ 14.355969] kunit_try_run_case+0x1a5/0x480 [ 14.356346] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.356878] kthread+0x337/0x6f0 [ 14.357118] ret_from_fork+0x116/0x1d0 [ 14.357309] ret_from_fork_asm+0x1a/0x30 [ 14.357747] [ 14.357908] The buggy address belongs to the object at ffff8881022a34a0 [ 14.357908] which belongs to the cache kmalloc-16 of size 16 [ 14.358506] The buggy address is located 8 bytes inside of [ 14.358506] freed 16-byte region [ffff8881022a34a0, ffff8881022a34b0) [ 14.359154] [ 14.359337] The buggy address belongs to the physical page: [ 14.359696] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022a3 [ 14.360672] flags: 0x200000000000000(node=0|zone=2) [ 14.361132] page_type: f5(slab) [ 14.361399] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.362159] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.362730] page dumped because: kasan: bad access detected [ 14.363118] [ 14.363504] Memory state around the buggy address: [ 14.363867] ffff8881022a3380: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 14.364151] ffff8881022a3400: 00 05 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 14.364784] >ffff8881022a3480: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 14.365021] ^ [ 14.365310] ffff8881022a3500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.365815] ffff8881022a3580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.366268] ==================================================================