Date
June 18, 2025, 6:43 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.308888] ================================================================== [ 20.309050] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 20.309194] Read of size 16 at addr fff00000c6058140 by task kunit_try_catch/178 [ 20.309320] [ 20.309404] CPU: 0 UID: 0 PID: 178 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT [ 20.309602] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.309661] Hardware name: linux,dummy-virt (DT) [ 20.309731] Call trace: [ 20.309781] show_stack+0x20/0x38 (C) [ 20.309893] dump_stack_lvl+0x8c/0xd0 [ 20.310002] print_report+0x118/0x608 [ 20.310110] kasan_report+0xdc/0x128 [ 20.310201] __asan_report_load16_noabort+0x20/0x30 [ 20.310314] kmalloc_uaf_16+0x3bc/0x438 [ 20.310419] kunit_try_run_case+0x170/0x3f0 [ 20.310543] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.310645] kthread+0x328/0x630 [ 20.310735] ret_from_fork+0x10/0x20 [ 20.310844] [ 20.310877] Allocated by task 178: [ 20.310939] kasan_save_stack+0x3c/0x68 [ 20.311043] kasan_save_track+0x20/0x40 [ 20.311138] kasan_save_alloc_info+0x40/0x58 [ 20.311261] __kasan_kmalloc+0xd4/0xd8 [ 20.311328] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.311448] kmalloc_uaf_16+0x140/0x438 [ 20.311555] kunit_try_run_case+0x170/0x3f0 [ 20.311667] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.311789] kthread+0x328/0x630 [ 20.311887] ret_from_fork+0x10/0x20 [ 20.311990] [ 20.312046] Freed by task 178: [ 20.312098] kasan_save_stack+0x3c/0x68 [ 20.312165] kasan_save_track+0x20/0x40 [ 20.312226] kasan_save_free_info+0x4c/0x78 [ 20.312303] __kasan_slab_free+0x6c/0x98 [ 20.312399] kfree+0x214/0x3c8 [ 20.312503] kmalloc_uaf_16+0x190/0x438 [ 20.312631] kunit_try_run_case+0x170/0x3f0 [ 20.312757] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.312889] kthread+0x328/0x630 [ 20.312970] ret_from_fork+0x10/0x20 [ 20.313096] [ 20.313159] The buggy address belongs to the object at fff00000c6058140 [ 20.313159] which belongs to the cache kmalloc-16 of size 16 [ 20.313340] The buggy address is located 0 bytes inside of [ 20.313340] freed 16-byte region [fff00000c6058140, fff00000c6058150) [ 20.313501] [ 20.313559] The buggy address belongs to the physical page: [ 20.313658] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106058 [ 20.313828] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.313943] page_type: f5(slab) [ 20.314322] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 20.314448] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 20.314530] page dumped because: kasan: bad access detected [ 20.314594] [ 20.314635] Memory state around the buggy address: [ 20.314708] fff00000c6058000: 00 00 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 20.314815] fff00000c6058080: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 20.314950] >fff00000c6058100: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 20.315076] ^ [ 20.315188] fff00000c6058180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.315269] fff00000c6058200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.315337] ==================================================================
[ 11.155619] ================================================================== [ 11.156092] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.156593] Read of size 16 at addr ffff888101677be0 by task kunit_try_catch/194 [ 11.156899] [ 11.156997] CPU: 0 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT(voluntary) [ 11.157044] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.157056] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.157078] Call Trace: [ 11.157090] <TASK> [ 11.157106] dump_stack_lvl+0x73/0xb0 [ 11.157136] print_report+0xd1/0x650 [ 11.157156] ? __virt_addr_valid+0x1db/0x2d0 [ 11.157179] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.157198] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.157240] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.157260] kasan_report+0x141/0x180 [ 11.157280] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.157303] __asan_report_load16_noabort+0x18/0x20 [ 11.157326] kmalloc_uaf_16+0x47b/0x4c0 [ 11.157345] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.157365] ? __schedule+0x10cc/0x2b60 [ 11.157387] ? __pfx_read_tsc+0x10/0x10 [ 11.157407] ? ktime_get_ts64+0x86/0x230 [ 11.157433] kunit_try_run_case+0x1a5/0x480 [ 11.158081] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.158105] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.158130] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.158153] ? __kthread_parkme+0x82/0x180 [ 11.158198] ? preempt_count_sub+0x50/0x80 [ 11.158232] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.158255] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.158277] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.158298] kthread+0x337/0x6f0 [ 11.158316] ? trace_preempt_on+0x20/0xc0 [ 11.158340] ? __pfx_kthread+0x10/0x10 [ 11.158359] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.158378] ? calculate_sigpending+0x7b/0xa0 [ 11.158402] ? __pfx_kthread+0x10/0x10 [ 11.158427] ret_from_fork+0x116/0x1d0 [ 11.158445] ? __pfx_kthread+0x10/0x10 [ 11.158464] ret_from_fork_asm+0x1a/0x30 [ 11.158493] </TASK> [ 11.158504] [ 11.166886] Allocated by task 194: [ 11.167062] kasan_save_stack+0x45/0x70 [ 11.167397] kasan_save_track+0x18/0x40 [ 11.167697] kasan_save_alloc_info+0x3b/0x50 [ 11.167851] __kasan_kmalloc+0xb7/0xc0 [ 11.168014] __kmalloc_cache_noprof+0x189/0x420 [ 11.168295] kmalloc_uaf_16+0x15b/0x4c0 [ 11.168571] kunit_try_run_case+0x1a5/0x480 [ 11.168780] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.169018] kthread+0x337/0x6f0 [ 11.169144] ret_from_fork+0x116/0x1d0 [ 11.169428] ret_from_fork_asm+0x1a/0x30 [ 11.169621] [ 11.169706] Freed by task 194: [ 11.169836] kasan_save_stack+0x45/0x70 [ 11.170011] kasan_save_track+0x18/0x40 [ 11.170190] kasan_save_free_info+0x3f/0x60 [ 11.170384] __kasan_slab_free+0x56/0x70 [ 11.170571] kfree+0x222/0x3f0 [ 11.170739] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.170882] kunit_try_run_case+0x1a5/0x480 [ 11.171080] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.171288] kthread+0x337/0x6f0 [ 11.171493] ret_from_fork+0x116/0x1d0 [ 11.171630] ret_from_fork_asm+0x1a/0x30 [ 11.171794] [ 11.171887] The buggy address belongs to the object at ffff888101677be0 [ 11.171887] which belongs to the cache kmalloc-16 of size 16 [ 11.172303] The buggy address is located 0 bytes inside of [ 11.172303] freed 16-byte region [ffff888101677be0, ffff888101677bf0) [ 11.172945] [ 11.173054] The buggy address belongs to the physical page: [ 11.173525] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101677 [ 11.173815] flags: 0x200000000000000(node=0|zone=2) [ 11.174037] page_type: f5(slab) [ 11.174191] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.174430] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.174651] page dumped because: kasan: bad access detected [ 11.174813] [ 11.174874] Memory state around the buggy address: [ 11.175128] ffff888101677a80: 00 00 fc fc 00 04 fc fc 00 04 fc fc fa fb fc fc [ 11.175408] ffff888101677b00: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 11.175981] >ffff888101677b80: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 11.176198] ^ [ 11.176395] ffff888101677c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.176602] ffff888101677c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.176811] ==================================================================