Date
July 18, 2025, 1:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.635337] ================================================================== [ 31.635394] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 31.635444] Read of size 1 at addr fff00000c907e0e8 by task kunit_try_catch/215 [ 31.635493] [ 31.635522] CPU: 0 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 31.635605] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.635630] Hardware name: linux,dummy-virt (DT) [ 31.635661] Call trace: [ 31.635685] show_stack+0x20/0x38 (C) [ 31.635732] dump_stack_lvl+0x8c/0xd0 [ 31.635779] print_report+0x118/0x5e8 [ 31.635820] kasan_report+0xdc/0x128 [ 31.635862] __asan_report_load1_noabort+0x20/0x30 [ 31.635910] kmalloc_uaf+0x300/0x338 [ 31.635952] kunit_try_run_case+0x170/0x3f0 [ 31.635998] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.636528] kthread+0x328/0x630 [ 31.636835] ret_from_fork+0x10/0x20 [ 31.637096] [ 31.637226] Allocated by task 215: [ 31.637279] kasan_save_stack+0x3c/0x68 [ 31.637643] kasan_save_track+0x20/0x40 [ 31.637711] kasan_save_alloc_info+0x40/0x58 [ 31.637772] __kasan_kmalloc+0xd4/0xd8 [ 31.637856] __kmalloc_cache_noprof+0x16c/0x3c0 [ 31.637958] kmalloc_uaf+0xb8/0x338 [ 31.638126] kunit_try_run_case+0x170/0x3f0 [ 31.638224] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.638536] kthread+0x328/0x630 [ 31.638699] ret_from_fork+0x10/0x20 [ 31.638857] [ 31.638926] Freed by task 215: [ 31.639055] kasan_save_stack+0x3c/0x68 [ 31.639132] kasan_save_track+0x20/0x40 [ 31.639236] kasan_save_free_info+0x4c/0x78 [ 31.639305] __kasan_slab_free+0x6c/0x98 [ 31.639370] kfree+0x214/0x3c8 [ 31.639678] kmalloc_uaf+0x11c/0x338 [ 31.639768] kunit_try_run_case+0x170/0x3f0 [ 31.639842] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.639990] kthread+0x328/0x630 [ 31.640156] ret_from_fork+0x10/0x20 [ 31.640242] [ 31.640568] The buggy address belongs to the object at fff00000c907e0e0 [ 31.640568] which belongs to the cache kmalloc-16 of size 16 [ 31.640657] The buggy address is located 8 bytes inside of [ 31.640657] freed 16-byte region [fff00000c907e0e0, fff00000c907e0f0) [ 31.640820] [ 31.640869] The buggy address belongs to the physical page: [ 31.640928] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xfff00000c907e020 pfn:0x10907e [ 31.641251] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.641379] page_type: f5(slab) [ 31.641434] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.641532] raw: fff00000c907e020 000000008080007f 00000000f5000000 0000000000000000 [ 31.641641] page dumped because: kasan: bad access detected [ 31.641724] [ 31.641792] Memory state around the buggy address: [ 31.642106] fff00000c907df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.642211] fff00000c907e000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.642285] >fff00000c907e080: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.642354] ^ [ 31.642495] fff00000c907e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.642569] fff00000c907e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.642725] ==================================================================
[ 25.061527] ================================================================== [ 25.061989] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 25.062220] Read of size 1 at addr ffff888105380c28 by task kunit_try_catch/232 [ 25.062436] [ 25.062520] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT(voluntary) [ 25.062569] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.062580] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.062601] Call Trace: [ 25.062613] <TASK> [ 25.062636] dump_stack_lvl+0x73/0xb0 [ 25.062667] print_report+0xd1/0x640 [ 25.062689] ? __virt_addr_valid+0x1db/0x2d0 [ 25.062712] ? kmalloc_uaf+0x320/0x380 [ 25.062730] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.062755] ? kmalloc_uaf+0x320/0x380 [ 25.062774] kasan_report+0x141/0x180 [ 25.062794] ? kmalloc_uaf+0x320/0x380 [ 25.062817] __asan_report_load1_noabort+0x18/0x20 [ 25.062841] kmalloc_uaf+0x320/0x380 [ 25.062860] ? __pfx_kmalloc_uaf+0x10/0x10 [ 25.062879] ? __schedule+0x10da/0x2b60 [ 25.062902] ? __pfx_read_tsc+0x10/0x10 [ 25.062923] ? ktime_get_ts64+0x86/0x230 [ 25.062947] kunit_try_run_case+0x1a5/0x480 [ 25.062971] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.062992] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.063025] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.063056] ? __kthread_parkme+0x82/0x180 [ 25.063075] ? preempt_count_sub+0x50/0x80 [ 25.063097] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.063118] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.063140] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.063161] kthread+0x337/0x6f0 [ 25.063180] ? trace_preempt_on+0x20/0xc0 [ 25.063607] ? __pfx_kthread+0x10/0x10 [ 25.063646] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.063696] ? calculate_sigpending+0x7b/0xa0 [ 25.063723] ? __pfx_kthread+0x10/0x10 [ 25.063750] ret_from_fork+0x116/0x1d0 [ 25.063770] ? __pfx_kthread+0x10/0x10 [ 25.063967] ret_from_fork_asm+0x1a/0x30 [ 25.064001] </TASK> [ 25.064040] [ 25.076858] Allocated by task 232: [ 25.077174] kasan_save_stack+0x45/0x70 [ 25.077602] kasan_save_track+0x18/0x40 [ 25.077835] kasan_save_alloc_info+0x3b/0x50 [ 25.078171] __kasan_kmalloc+0xb7/0xc0 [ 25.078533] __kmalloc_cache_noprof+0x189/0x420 [ 25.078738] kmalloc_uaf+0xaa/0x380 [ 25.078955] kunit_try_run_case+0x1a5/0x480 [ 25.079337] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.079674] kthread+0x337/0x6f0 [ 25.079814] ret_from_fork+0x116/0x1d0 [ 25.080294] ret_from_fork_asm+0x1a/0x30 [ 25.080522] [ 25.080595] Freed by task 232: [ 25.080776] kasan_save_stack+0x45/0x70 [ 25.081281] kasan_save_track+0x18/0x40 [ 25.081444] kasan_save_free_info+0x3f/0x60 [ 25.081668] __kasan_slab_free+0x56/0x70 [ 25.082118] kfree+0x222/0x3f0 [ 25.082373] kmalloc_uaf+0x12c/0x380 [ 25.082662] kunit_try_run_case+0x1a5/0x480 [ 25.082912] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.083396] kthread+0x337/0x6f0 [ 25.083562] ret_from_fork+0x116/0x1d0 [ 25.083731] ret_from_fork_asm+0x1a/0x30 [ 25.083975] [ 25.084065] The buggy address belongs to the object at ffff888105380c20 [ 25.084065] which belongs to the cache kmalloc-16 of size 16 [ 25.085149] The buggy address is located 8 bytes inside of [ 25.085149] freed 16-byte region [ffff888105380c20, ffff888105380c30) [ 25.085753] [ 25.085858] The buggy address belongs to the physical page: [ 25.086247] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105380 [ 25.086785] flags: 0x200000000000000(node=0|zone=2) [ 25.087254] page_type: f5(slab) [ 25.087527] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 25.087896] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.088351] page dumped because: kasan: bad access detected [ 25.088607] [ 25.088696] Memory state around the buggy address: [ 25.089152] ffff888105380b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.089460] ffff888105380b80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.089751] >ffff888105380c00: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 25.090283] ^ [ 25.090525] ffff888105380c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.090972] ffff888105380d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.091256] ==================================================================