Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.641083] ================================================================== [ 19.641614] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.641727] Read of size 1 at addr fff00000c4561b08 by task kunit_try_catch/185 [ 19.642059] [ 19.642228] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.642525] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.642611] Hardware name: linux,dummy-virt (DT) [ 19.642786] Call trace: [ 19.642920] show_stack+0x20/0x38 (C) [ 19.643117] dump_stack_lvl+0x8c/0xd0 [ 19.643307] print_report+0x118/0x608 [ 19.643417] kasan_report+0xdc/0x128 [ 19.643786] __asan_report_load1_noabort+0x20/0x30 [ 19.643961] kmalloc_uaf+0x300/0x338 [ 19.644075] kunit_try_run_case+0x170/0x3f0 [ 19.644273] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.644477] kthread+0x328/0x630 [ 19.644570] ret_from_fork+0x10/0x20 [ 19.644936] [ 19.645321] Allocated by task 185: [ 19.645500] kasan_save_stack+0x3c/0x68 [ 19.645706] kasan_save_track+0x20/0x40 [ 19.645858] kasan_save_alloc_info+0x40/0x58 [ 19.645990] __kasan_kmalloc+0xd4/0xd8 [ 19.646072] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.646182] kmalloc_uaf+0xb8/0x338 [ 19.646261] kunit_try_run_case+0x170/0x3f0 [ 19.646334] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.646414] kthread+0x328/0x630 [ 19.646481] ret_from_fork+0x10/0x20 [ 19.646573] [ 19.646623] Freed by task 185: [ 19.646696] kasan_save_stack+0x3c/0x68 [ 19.646784] kasan_save_track+0x20/0x40 [ 19.646893] kasan_save_free_info+0x4c/0x78 [ 19.647030] __kasan_slab_free+0x6c/0x98 [ 19.647144] kfree+0x214/0x3c8 [ 19.647230] kmalloc_uaf+0x11c/0x338 [ 19.647312] kunit_try_run_case+0x170/0x3f0 [ 19.647404] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.647510] kthread+0x328/0x630 [ 19.647627] ret_from_fork+0x10/0x20 [ 19.647754] [ 19.647832] The buggy address belongs to the object at fff00000c4561b00 [ 19.647832] which belongs to the cache kmalloc-16 of size 16 [ 19.647959] The buggy address is located 8 bytes inside of [ 19.647959] freed 16-byte region [fff00000c4561b00, fff00000c4561b10) [ 19.648193] [ 19.648240] The buggy address belongs to the physical page: [ 19.648306] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104561 [ 19.648439] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.648562] page_type: f5(slab) [ 19.648754] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.648955] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.649092] page dumped because: kasan: bad access detected [ 19.649250] [ 19.649311] Memory state around the buggy address: [ 19.649399] fff00000c4561a00: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 19.649491] fff00000c4561a80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.649572] >fff00000c4561b00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.649657] ^ [ 19.649716] fff00000c4561b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.649875] fff00000c4561c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.649975] ==================================================================
[ 12.867202] ================================================================== [ 12.867758] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.868089] Read of size 1 at addr ffff888101c05d08 by task kunit_try_catch/202 [ 12.868338] [ 12.868448] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.868489] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.868499] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.868518] Call Trace: [ 12.868529] <TASK> [ 12.868543] dump_stack_lvl+0x73/0xb0 [ 12.868571] print_report+0xd1/0x650 [ 12.868594] ? __virt_addr_valid+0x1db/0x2d0 [ 12.868616] ? kmalloc_uaf+0x320/0x380 [ 12.868635] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.868951] ? kmalloc_uaf+0x320/0x380 [ 12.868976] kasan_report+0x141/0x180 [ 12.868998] ? kmalloc_uaf+0x320/0x380 [ 12.869022] __asan_report_load1_noabort+0x18/0x20 [ 12.869048] kmalloc_uaf+0x320/0x380 [ 12.869067] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.869088] ? __schedule+0x10cc/0x2b60 [ 12.869111] ? __pfx_read_tsc+0x10/0x10 [ 12.869132] ? ktime_get_ts64+0x86/0x230 [ 12.869156] kunit_try_run_case+0x1a5/0x480 [ 12.869181] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.869203] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.869227] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.869251] ? __kthread_parkme+0x82/0x180 [ 12.869271] ? preempt_count_sub+0x50/0x80 [ 12.869295] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.869319] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.869343] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.869368] kthread+0x337/0x6f0 [ 12.869387] ? trace_preempt_on+0x20/0xc0 [ 12.869409] ? __pfx_kthread+0x10/0x10 [ 12.869430] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.869451] ? calculate_sigpending+0x7b/0xa0 [ 12.869476] ? __pfx_kthread+0x10/0x10 [ 12.869497] ret_from_fork+0x116/0x1d0 [ 12.869514] ? __pfx_kthread+0x10/0x10 [ 12.869534] ret_from_fork_asm+0x1a/0x30 [ 12.869566] </TASK> [ 12.869576] [ 12.877158] Allocated by task 202: [ 12.877287] kasan_save_stack+0x45/0x70 [ 12.877430] kasan_save_track+0x18/0x40 [ 12.877622] kasan_save_alloc_info+0x3b/0x50 [ 12.877890] __kasan_kmalloc+0xb7/0xc0 [ 12.878077] __kmalloc_cache_noprof+0x189/0x420 [ 12.878300] kmalloc_uaf+0xaa/0x380 [ 12.878479] kunit_try_run_case+0x1a5/0x480 [ 12.878680] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.878911] kthread+0x337/0x6f0 [ 12.879249] ret_from_fork+0x116/0x1d0 [ 12.879451] ret_from_fork_asm+0x1a/0x30 [ 12.879639] [ 12.879800] Freed by task 202: [ 12.879939] kasan_save_stack+0x45/0x70 [ 12.880141] kasan_save_track+0x18/0x40 [ 12.880292] kasan_save_free_info+0x3f/0x60 [ 12.880501] __kasan_slab_free+0x56/0x70 [ 12.880637] kfree+0x222/0x3f0 [ 12.880764] kmalloc_uaf+0x12c/0x380 [ 12.880892] kunit_try_run_case+0x1a5/0x480 [ 12.881046] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.881293] kthread+0x337/0x6f0 [ 12.881558] ret_from_fork+0x116/0x1d0 [ 12.881942] ret_from_fork_asm+0x1a/0x30 [ 12.882143] [ 12.882236] The buggy address belongs to the object at ffff888101c05d00 [ 12.882236] which belongs to the cache kmalloc-16 of size 16 [ 12.882610] The buggy address is located 8 bytes inside of [ 12.882610] freed 16-byte region [ffff888101c05d00, ffff888101c05d10) [ 12.884007] [ 12.884113] The buggy address belongs to the physical page: [ 12.884366] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c05 [ 12.885281] flags: 0x200000000000000(node=0|zone=2) [ 12.885513] page_type: f5(slab) [ 12.885777] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.886294] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.886967] page dumped because: kasan: bad access detected [ 12.887307] [ 12.887402] Memory state around the buggy address: [ 12.887615] ffff888101c05c00: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.888220] ffff888101c05c80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.888781] >ffff888101c05d00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.889080] ^ [ 12.889245] ffff888101c05d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.889532] ffff888101c05e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.890212] ==================================================================