Date
July 10, 2025, 9:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.460815] ================================================================== [ 29.460873] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 29.460944] Read of size 16 at addr fff00000c8686ae0 by task kunit_try_catch/199 [ 29.461173] [ 29.461208] CPU: 0 UID: 0 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT [ 29.461295] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.461320] Hardware name: linux,dummy-virt (DT) [ 29.461350] Call trace: [ 29.461371] show_stack+0x20/0x38 (C) [ 29.461420] dump_stack_lvl+0x8c/0xd0 [ 29.461464] print_report+0x118/0x5d0 [ 29.461507] kasan_report+0xdc/0x128 [ 29.461551] __asan_report_load16_noabort+0x20/0x30 [ 29.461600] kmalloc_uaf_16+0x3bc/0x438 [ 29.461644] kunit_try_run_case+0x170/0x3f0 [ 29.461692] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.461745] kthread+0x328/0x630 [ 29.461786] ret_from_fork+0x10/0x20 [ 29.461832] [ 29.461849] Allocated by task 199: [ 29.461875] kasan_save_stack+0x3c/0x68 [ 29.461914] kasan_save_track+0x20/0x40 [ 29.461951] kasan_save_alloc_info+0x40/0x58 [ 29.461987] __kasan_kmalloc+0xd4/0xd8 [ 29.462023] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.462061] kmalloc_uaf_16+0x140/0x438 [ 29.462096] kunit_try_run_case+0x170/0x3f0 [ 29.462145] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.462205] kthread+0x328/0x630 [ 29.462238] ret_from_fork+0x10/0x20 [ 29.462272] [ 29.462290] Freed by task 199: [ 29.462314] kasan_save_stack+0x3c/0x68 [ 29.462351] kasan_save_track+0x20/0x40 [ 29.462394] kasan_save_free_info+0x4c/0x78 [ 29.462443] __kasan_slab_free+0x6c/0x98 [ 29.462537] kfree+0x214/0x3c8 [ 29.462575] kmalloc_uaf_16+0x190/0x438 [ 29.462617] kunit_try_run_case+0x170/0x3f0 [ 29.462724] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.462767] kthread+0x328/0x630 [ 29.462798] ret_from_fork+0x10/0x20 [ 29.462832] [ 29.462860] The buggy address belongs to the object at fff00000c8686ae0 [ 29.462860] which belongs to the cache kmalloc-16 of size 16 [ 29.462928] The buggy address is located 0 bytes inside of [ 29.462928] freed 16-byte region [fff00000c8686ae0, fff00000c8686af0) [ 29.462995] [ 29.463015] The buggy address belongs to the physical page: [ 29.463116] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xfff00000c8686a40 pfn:0x108686 [ 29.463183] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.463232] page_type: f5(slab) [ 29.463269] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 29.463360] raw: fff00000c8686a40 000000008080007f 00000000f5000000 0000000000000000 [ 29.463419] page dumped because: kasan: bad access detected [ 29.463449] [ 29.463466] Memory state around the buggy address: [ 29.463495] fff00000c8686980: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.463544] fff00000c8686a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.463586] >fff00000c8686a80: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 29.463624] ^ [ 29.463671] fff00000c8686b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.463727] fff00000c8686b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.463781] ==================================================================
[ 25.045035] ================================================================== [ 25.046170] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 25.046853] Read of size 16 at addr ffff888103cd6760 by task kunit_try_catch/216 [ 25.047166] [ 25.047281] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT(voluntary) [ 25.047333] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.047345] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.047366] Call Trace: [ 25.047380] <TASK> [ 25.047399] dump_stack_lvl+0x73/0xb0 [ 25.047429] print_report+0xd1/0x610 [ 25.047453] ? __virt_addr_valid+0x1db/0x2d0 [ 25.047478] ? kmalloc_uaf_16+0x47b/0x4c0 [ 25.047774] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.047819] ? kmalloc_uaf_16+0x47b/0x4c0 [ 25.047841] kasan_report+0x141/0x180 [ 25.047869] ? kmalloc_uaf_16+0x47b/0x4c0 [ 25.047927] __asan_report_load16_noabort+0x18/0x20 [ 25.047953] kmalloc_uaf_16+0x47b/0x4c0 [ 25.047974] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 25.047995] ? __schedule+0x10cc/0x2b60 [ 25.048020] ? __pfx_read_tsc+0x10/0x10 [ 25.048042] ? ktime_get_ts64+0x86/0x230 [ 25.048067] kunit_try_run_case+0x1a5/0x480 [ 25.048089] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.048109] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.048132] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.048155] ? __kthread_parkme+0x82/0x180 [ 25.048175] ? preempt_count_sub+0x50/0x80 [ 25.048200] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.048221] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.048246] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.048270] kthread+0x337/0x6f0 [ 25.048290] ? trace_preempt_on+0x20/0xc0 [ 25.048314] ? __pfx_kthread+0x10/0x10 [ 25.048334] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.048355] ? calculate_sigpending+0x7b/0xa0 [ 25.048379] ? __pfx_kthread+0x10/0x10 [ 25.048400] ret_from_fork+0x116/0x1d0 [ 25.048419] ? __pfx_kthread+0x10/0x10 [ 25.048439] ret_from_fork_asm+0x1a/0x30 [ 25.048469] </TASK> [ 25.048482] [ 25.059519] Allocated by task 216: [ 25.059889] kasan_save_stack+0x45/0x70 [ 25.060179] kasan_save_track+0x18/0x40 [ 25.060355] kasan_save_alloc_info+0x3b/0x50 [ 25.060761] __kasan_kmalloc+0xb7/0xc0 [ 25.061138] __kmalloc_cache_noprof+0x189/0x420 [ 25.061359] kmalloc_uaf_16+0x15b/0x4c0 [ 25.061869] kunit_try_run_case+0x1a5/0x480 [ 25.062064] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.062303] kthread+0x337/0x6f0 [ 25.062462] ret_from_fork+0x116/0x1d0 [ 25.062991] ret_from_fork_asm+0x1a/0x30 [ 25.063261] [ 25.063356] Freed by task 216: [ 25.063683] kasan_save_stack+0x45/0x70 [ 25.063964] kasan_save_track+0x18/0x40 [ 25.064144] kasan_save_free_info+0x3f/0x60 [ 25.064324] __kasan_slab_free+0x56/0x70 [ 25.064746] kfree+0x222/0x3f0 [ 25.065067] kmalloc_uaf_16+0x1d6/0x4c0 [ 25.065437] kunit_try_run_case+0x1a5/0x480 [ 25.065849] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.066100] kthread+0x337/0x6f0 [ 25.066258] ret_from_fork+0x116/0x1d0 [ 25.066430] ret_from_fork_asm+0x1a/0x30 [ 25.066997] [ 25.067093] The buggy address belongs to the object at ffff888103cd6760 [ 25.067093] which belongs to the cache kmalloc-16 of size 16 [ 25.068031] The buggy address is located 0 bytes inside of [ 25.068031] freed 16-byte region [ffff888103cd6760, ffff888103cd6770) [ 25.068775] [ 25.069028] The buggy address belongs to the physical page: [ 25.069381] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103cd6 [ 25.070211] flags: 0x200000000000000(node=0|zone=2) [ 25.070436] page_type: f5(slab) [ 25.070755] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 25.071415] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.072070] page dumped because: kasan: bad access detected [ 25.072432] [ 25.072540] Memory state around the buggy address: [ 25.072952] ffff888103cd6600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.073416] ffff888103cd6680: fa fb fc fc 00 06 fc fc 00 06 fc fc 00 06 fc fc [ 25.074048] >ffff888103cd6700: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 25.074714] ^ [ 25.075205] ffff888103cd6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.075668] ffff888103cd6800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.076105] ==================================================================