Date
June 23, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.139977] ================================================================== [ 33.140115] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 33.140234] Read of size 1 at addr fff00000c56f1308 by task kunit_try_catch/196 [ 33.140347] [ 33.140420] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT [ 33.140613] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.140679] Hardware name: linux,dummy-virt (DT) [ 33.140763] Call trace: [ 33.140916] show_stack+0x20/0x38 (C) [ 33.141142] dump_stack_lvl+0x8c/0xd0 [ 33.141318] print_report+0x118/0x608 [ 33.141463] kasan_report+0xdc/0x128 [ 33.141691] __asan_report_load1_noabort+0x20/0x30 [ 33.141912] kmalloc_uaf+0x300/0x338 [ 33.142064] kunit_try_run_case+0x170/0x3f0 [ 33.142248] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.142392] kthread+0x328/0x630 [ 33.142623] ret_from_fork+0x10/0x20 [ 33.142849] [ 33.142960] Allocated by task 196: [ 33.143131] kasan_save_stack+0x3c/0x68 [ 33.143241] kasan_save_track+0x20/0x40 [ 33.143440] kasan_save_alloc_info+0x40/0x58 [ 33.143635] __kasan_kmalloc+0xd4/0xd8 [ 33.143808] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.143916] kmalloc_uaf+0xb8/0x338 [ 33.144010] kunit_try_run_case+0x170/0x3f0 [ 33.144665] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.145017] kthread+0x328/0x630 [ 33.145123] ret_from_fork+0x10/0x20 [ 33.145791] [ 33.146051] Freed by task 196: [ 33.146125] kasan_save_stack+0x3c/0x68 [ 33.146226] kasan_save_track+0x20/0x40 [ 33.146319] kasan_save_free_info+0x4c/0x78 [ 33.147565] __kasan_slab_free+0x6c/0x98 [ 33.147915] kfree+0x214/0x3c8 [ 33.148786] kmalloc_uaf+0x11c/0x338 [ 33.149910] kunit_try_run_case+0x170/0x3f0 [ 33.150052] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.150150] kthread+0x328/0x630 [ 33.150199] ret_from_fork+0x10/0x20 [ 33.150243] [ 33.150289] The buggy address belongs to the object at fff00000c56f1300 [ 33.150289] which belongs to the cache kmalloc-16 of size 16 [ 33.150386] The buggy address is located 8 bytes inside of [ 33.150386] freed 16-byte region [fff00000c56f1300, fff00000c56f1310) [ 33.150457] [ 33.150483] The buggy address belongs to the physical page: [ 33.150520] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 33.150663] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.150787] page_type: f5(slab) [ 33.150874] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 33.151100] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 33.151203] page dumped because: kasan: bad access detected [ 33.151285] [ 33.151330] Memory state around the buggy address: [ 33.151408] fff00000c56f1200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.151509] fff00000c56f1280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.151608] >fff00000c56f1300: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.151734] ^ [ 33.151859] fff00000c56f1380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.151981] fff00000c56f1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.152121] ==================================================================
[ 22.032296] ================================================================== [ 22.032768] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 22.033535] Read of size 1 at addr ffff888102370308 by task kunit_try_catch/213 [ 22.033859] [ 22.034043] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT(voluntary) [ 22.034124] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.034366] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.034422] Call Trace: [ 22.034472] <TASK> [ 22.034505] dump_stack_lvl+0x73/0xb0 [ 22.034584] print_report+0xd1/0x650 [ 22.034628] ? __virt_addr_valid+0x1db/0x2d0 [ 22.034673] ? kmalloc_uaf+0x320/0x380 [ 22.034945] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.034971] ? kmalloc_uaf+0x320/0x380 [ 22.034988] kasan_report+0x141/0x180 [ 22.035007] ? kmalloc_uaf+0x320/0x380 [ 22.035028] __asan_report_load1_noabort+0x18/0x20 [ 22.035048] kmalloc_uaf+0x320/0x380 [ 22.035065] ? __pfx_kmalloc_uaf+0x10/0x10 [ 22.035093] ? __schedule+0x10cc/0x2b60 [ 22.035122] ? __pfx_read_tsc+0x10/0x10 [ 22.035151] ? ktime_get_ts64+0x86/0x230 [ 22.035184] kunit_try_run_case+0x1a5/0x480 [ 22.035207] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.035226] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.035246] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.035265] ? __kthread_parkme+0x82/0x180 [ 22.035282] ? preempt_count_sub+0x50/0x80 [ 22.035302] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.035323] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.035342] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.035362] kthread+0x337/0x6f0 [ 22.035395] ? trace_preempt_on+0x20/0xc0 [ 22.035419] ? __pfx_kthread+0x10/0x10 [ 22.035437] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.035454] ? calculate_sigpending+0x7b/0xa0 [ 22.035475] ? __pfx_kthread+0x10/0x10 [ 22.035493] ret_from_fork+0x116/0x1d0 [ 22.035509] ? __pfx_kthread+0x10/0x10 [ 22.035526] ret_from_fork_asm+0x1a/0x30 [ 22.035555] </TASK> [ 22.035566] [ 22.047361] Allocated by task 213: [ 22.047506] kasan_save_stack+0x45/0x70 [ 22.048073] kasan_save_track+0x18/0x40 [ 22.048401] kasan_save_alloc_info+0x3b/0x50 [ 22.048904] __kasan_kmalloc+0xb7/0xc0 [ 22.049072] __kmalloc_cache_noprof+0x189/0x420 [ 22.049545] kmalloc_uaf+0xaa/0x380 [ 22.049765] kunit_try_run_case+0x1a5/0x480 [ 22.050609] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.050869] kthread+0x337/0x6f0 [ 22.051561] ret_from_fork+0x116/0x1d0 [ 22.051705] ret_from_fork_asm+0x1a/0x30 [ 22.051836] [ 22.052109] Freed by task 213: [ 22.052367] kasan_save_stack+0x45/0x70 [ 22.052956] kasan_save_track+0x18/0x40 [ 22.053264] kasan_save_free_info+0x3f/0x60 [ 22.053519] __kasan_slab_free+0x56/0x70 [ 22.053727] kfree+0x222/0x3f0 [ 22.053870] kmalloc_uaf+0x12c/0x380 [ 22.054661] kunit_try_run_case+0x1a5/0x480 [ 22.054900] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.055050] kthread+0x337/0x6f0 [ 22.055278] ret_from_fork+0x116/0x1d0 [ 22.055587] ret_from_fork_asm+0x1a/0x30 [ 22.056613] [ 22.056761] The buggy address belongs to the object at ffff888102370300 [ 22.056761] which belongs to the cache kmalloc-16 of size 16 [ 22.057723] The buggy address is located 8 bytes inside of [ 22.057723] freed 16-byte region [ffff888102370300, ffff888102370310) [ 22.058506] [ 22.058678] The buggy address belongs to the physical page: [ 22.059397] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102370 [ 22.059641] flags: 0x200000000000000(node=0|zone=2) [ 22.060066] page_type: f5(slab) [ 22.060439] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 22.060827] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.061656] page dumped because: kasan: bad access detected [ 22.061920] [ 22.061992] Memory state around the buggy address: [ 22.062499] ffff888102370200: 00 00 fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 22.062772] ffff888102370280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.063789] >ffff888102370300: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.064092] ^ [ 22.064730] ffff888102370380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.065432] ffff888102370400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.065794] ==================================================================