Date
June 23, 2025, 1:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.639229] ================================================================== [ 24.639309] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 24.639382] Read of size 16 at addr fff00000c5e9dda0 by task kunit_try_catch/170 [ 24.639520] [ 24.639606] CPU: 0 UID: 0 PID: 170 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT [ 24.639834] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.640111] Hardware name: linux,dummy-virt (DT) [ 24.640201] Call trace: [ 24.640252] show_stack+0x20/0x38 (C) [ 24.640380] dump_stack_lvl+0x8c/0xd0 [ 24.640530] print_report+0x118/0x608 [ 24.640787] kasan_report+0xdc/0x128 [ 24.641019] __asan_report_load16_noabort+0x20/0x30 [ 24.641243] kmalloc_uaf_16+0x3bc/0x438 [ 24.641499] kunit_try_run_case+0x170/0x3f0 [ 24.641840] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.642208] kthread+0x328/0x630 [ 24.642499] ret_from_fork+0x10/0x20 [ 24.643092] [ 24.643147] Allocated by task 170: [ 24.643225] kasan_save_stack+0x3c/0x68 [ 24.643317] kasan_save_track+0x20/0x40 [ 24.643439] kasan_save_alloc_info+0x40/0x58 [ 24.643556] __kasan_kmalloc+0xd4/0xd8 [ 24.643644] __kmalloc_cache_noprof+0x16c/0x3c0 [ 24.643801] kmalloc_uaf_16+0x140/0x438 [ 24.643926] kunit_try_run_case+0x170/0x3f0 [ 24.644170] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.644275] kthread+0x328/0x630 [ 24.644448] ret_from_fork+0x10/0x20 [ 24.644541] [ 24.644584] Freed by task 170: [ 24.644645] kasan_save_stack+0x3c/0x68 [ 24.644767] kasan_save_track+0x20/0x40 [ 24.645017] kasan_save_free_info+0x4c/0x78 [ 24.645268] __kasan_slab_free+0x6c/0x98 [ 24.645358] kfree+0x214/0x3c8 [ 24.645465] kmalloc_uaf_16+0x190/0x438 [ 24.645625] kunit_try_run_case+0x170/0x3f0 [ 24.645758] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.645866] kthread+0x328/0x630 [ 24.646012] ret_from_fork+0x10/0x20 [ 24.646093] [ 24.646190] The buggy address belongs to the object at fff00000c5e9dda0 [ 24.646190] which belongs to the cache kmalloc-16 of size 16 [ 24.646320] The buggy address is located 0 bytes inside of [ 24.646320] freed 16-byte region [fff00000c5e9dda0, fff00000c5e9ddb0) [ 24.646471] [ 24.646520] The buggy address belongs to the physical page: [ 24.646591] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105e9d [ 24.646717] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.646841] page_type: f5(slab) [ 24.646965] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 24.647148] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.647279] page dumped because: kasan: bad access detected [ 24.647347] [ 24.647406] Memory state around the buggy address: [ 24.647596] fff00000c5e9dc80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.647700] fff00000c5e9dd00: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.647904] >fff00000c5e9dd80: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 24.647990] ^ [ 24.648128] fff00000c5e9de00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.648247] fff00000c5e9de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.648403] ==================================================================
[ 17.154089] ================================================================== [ 17.155261] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 17.156536] Read of size 16 at addr ffff888102175260 by task kunit_try_catch/189 [ 17.157250] [ 17.157541] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT(voluntary) [ 17.157682] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.157718] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 17.157803] Call Trace: [ 17.157872] <TASK> [ 17.157917] dump_stack_lvl+0x73/0xb0 [ 17.158038] print_report+0xd1/0x650 [ 17.158113] ? __virt_addr_valid+0x1db/0x2d0 [ 17.158183] ? kmalloc_uaf_16+0x47b/0x4c0 [ 17.158278] ? kasan_complete_mode_report_info+0x64/0x200 [ 17.158317] ? kmalloc_uaf_16+0x47b/0x4c0 [ 17.158348] kasan_report+0x141/0x180 [ 17.158402] ? kmalloc_uaf_16+0x47b/0x4c0 [ 17.158472] __asan_report_load16_noabort+0x18/0x20 [ 17.158508] kmalloc_uaf_16+0x47b/0x4c0 [ 17.158541] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 17.158574] ? __schedule+0x10cc/0x2b60 [ 17.158672] ? __pfx_read_tsc+0x10/0x10 [ 17.158740] ? ktime_get_ts64+0x86/0x230 [ 17.158783] kunit_try_run_case+0x1a5/0x480 [ 17.158822] ? __pfx_kunit_try_run_case+0x10/0x10 [ 17.158856] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 17.158893] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 17.158928] ? __kthread_parkme+0x82/0x180 [ 17.158960] ? preempt_count_sub+0x50/0x80 [ 17.158996] ? __pfx_kunit_try_run_case+0x10/0x10 [ 17.159031] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.159064] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 17.159098] kthread+0x337/0x6f0 [ 17.159121] ? trace_preempt_on+0x20/0xc0 [ 17.159154] ? __pfx_kthread+0x10/0x10 [ 17.159180] ? _raw_spin_unlock_irq+0x47/0x80 [ 17.159211] ? calculate_sigpending+0x7b/0xa0 [ 17.159280] ? __pfx_kthread+0x10/0x10 [ 17.159310] ret_from_fork+0x41/0x80 [ 17.159341] ? __pfx_kthread+0x10/0x10 [ 17.159366] ret_from_fork_asm+0x1a/0x30 [ 17.159410] </TASK> [ 17.159425] [ 17.176868] Allocated by task 189: [ 17.177355] kasan_save_stack+0x45/0x70 [ 17.178051] kasan_save_track+0x18/0x40 [ 17.178515] kasan_save_alloc_info+0x3b/0x50 [ 17.178959] __kasan_kmalloc+0xb7/0xc0 [ 17.179332] __kmalloc_cache_noprof+0x189/0x420 [ 17.180153] kmalloc_uaf_16+0x15b/0x4c0 [ 17.180650] kunit_try_run_case+0x1a5/0x480 [ 17.181116] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.181529] kthread+0x337/0x6f0 [ 17.181878] ret_from_fork+0x41/0x80 [ 17.182352] ret_from_fork_asm+0x1a/0x30 [ 17.183257] [ 17.183620] Freed by task 189: [ 17.184185] kasan_save_stack+0x45/0x70 [ 17.184497] kasan_save_track+0x18/0x40 [ 17.185387] kasan_save_free_info+0x3f/0x60 [ 17.186273] __kasan_slab_free+0x56/0x70 [ 17.186901] kfree+0x222/0x3f0 [ 17.187519] kmalloc_uaf_16+0x1d6/0x4c0 [ 17.187882] kunit_try_run_case+0x1a5/0x480 [ 17.188847] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 17.189350] kthread+0x337/0x6f0 [ 17.189682] ret_from_fork+0x41/0x80 [ 17.190123] ret_from_fork_asm+0x1a/0x30 [ 17.191250] [ 17.191864] The buggy address belongs to the object at ffff888102175260 [ 17.191864] which belongs to the cache kmalloc-16 of size 16 [ 17.192700] The buggy address is located 0 bytes inside of [ 17.192700] freed 16-byte region [ffff888102175260, ffff888102175270) [ 17.194106] [ 17.194340] The buggy address belongs to the physical page: [ 17.194968] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102175 [ 17.195672] flags: 0x200000000000000(node=0|zone=2) [ 17.196153] page_type: f5(slab) [ 17.196950] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 17.197653] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 17.198591] page dumped because: kasan: bad access detected [ 17.199538] [ 17.199772] Memory state around the buggy address: [ 17.200219] ffff888102175100: 00 06 fc fc 00 04 fc fc 00 00 fc fc 00 04 fc fc [ 17.200751] ffff888102175180: 00 04 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 17.201332] >ffff888102175200: 00 04 fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 17.202371] ^ [ 17.202942] ffff888102175280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.203543] ffff888102175300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.204211] ==================================================================