Date
July 11, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.654507] ================================================================== [ 16.654571] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.654629] Read of size 16 at addr fff00000c3f2f600 by task kunit_try_catch/169 [ 16.654678] [ 16.654716] CPU: 0 UID: 0 PID: 169 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.654800] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.654825] Hardware name: linux,dummy-virt (DT) [ 16.658797] Call trace: [ 16.658827] show_stack+0x20/0x38 (C) [ 16.659310] dump_stack_lvl+0x8c/0xd0 [ 16.659391] print_report+0x118/0x608 [ 16.659440] kasan_report+0xdc/0x128 [ 16.659486] __asan_report_load16_noabort+0x20/0x30 [ 16.659536] kmalloc_uaf_16+0x3bc/0x438 [ 16.659583] kunit_try_run_case+0x170/0x3f0 [ 16.659631] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.659683] kthread+0x328/0x630 [ 16.659725] ret_from_fork+0x10/0x20 [ 16.659774] [ 16.659793] Allocated by task 169: [ 16.659822] kasan_save_stack+0x3c/0x68 [ 16.659875] kasan_save_track+0x20/0x40 [ 16.659911] kasan_save_alloc_info+0x40/0x58 [ 16.660061] __kasan_kmalloc+0xd4/0xd8 [ 16.660278] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.660395] kmalloc_uaf_16+0x140/0x438 [ 16.660441] kunit_try_run_case+0x170/0x3f0 [ 16.660477] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.660519] kthread+0x328/0x630 [ 16.660550] ret_from_fork+0x10/0x20 [ 16.660599] [ 16.660617] Freed by task 169: [ 16.660644] kasan_save_stack+0x3c/0x68 [ 16.660682] kasan_save_track+0x20/0x40 [ 16.660717] kasan_save_free_info+0x4c/0x78 [ 16.660765] __kasan_slab_free+0x6c/0x98 [ 16.660800] kfree+0x214/0x3c8 [ 16.660832] kmalloc_uaf_16+0x190/0x438 [ 16.660887] kunit_try_run_case+0x170/0x3f0 [ 16.660923] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.660965] kthread+0x328/0x630 [ 16.661005] ret_from_fork+0x10/0x20 [ 16.661056] [ 16.661090] The buggy address belongs to the object at fff00000c3f2f600 [ 16.661090] which belongs to the cache kmalloc-16 of size 16 [ 16.661156] The buggy address is located 0 bytes inside of [ 16.661156] freed 16-byte region [fff00000c3f2f600, fff00000c3f2f610) [ 16.661225] [ 16.661255] The buggy address belongs to the physical page: [ 16.661286] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f2f [ 16.661340] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.661390] page_type: f5(slab) [ 16.661430] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.661480] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.661529] page dumped because: kasan: bad access detected [ 16.661560] [ 16.661578] Memory state around the buggy address: [ 16.661618] fff00000c3f2f500: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 16.661670] fff00000c3f2f580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 16.661720] >fff00000c3f2f600: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.661758] ^ [ 16.661784] fff00000c3f2f680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.661824] fff00000c3f2f700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.661871] ==================================================================
[ 12.415333] ================================================================== [ 12.415782] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.416090] Read of size 16 at addr ffff888102321e60 by task kunit_try_catch/185 [ 12.416501] [ 12.416604] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.416646] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.416657] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.416676] Call Trace: [ 12.416687] <TASK> [ 12.416701] dump_stack_lvl+0x73/0xb0 [ 12.416731] print_report+0xd1/0x650 [ 12.416765] ? __virt_addr_valid+0x1db/0x2d0 [ 12.416788] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.416808] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.416831] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.416852] kasan_report+0x141/0x180 [ 12.416873] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.416899] __asan_report_load16_noabort+0x18/0x20 [ 12.416935] kmalloc_uaf_16+0x47b/0x4c0 [ 12.416956] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.416978] ? __schedule+0x10cc/0x2b60 [ 12.416999] ? __pfx_read_tsc+0x10/0x10 [ 12.417019] ? ktime_get_ts64+0x86/0x230 [ 12.417043] kunit_try_run_case+0x1a5/0x480 [ 12.417067] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.417137] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.417161] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.417185] ? __kthread_parkme+0x82/0x180 [ 12.417205] ? preempt_count_sub+0x50/0x80 [ 12.417229] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.417253] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.417278] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.417303] kthread+0x337/0x6f0 [ 12.417321] ? trace_preempt_on+0x20/0xc0 [ 12.417343] ? __pfx_kthread+0x10/0x10 [ 12.417364] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.417385] ? calculate_sigpending+0x7b/0xa0 [ 12.417408] ? __pfx_kthread+0x10/0x10 [ 12.417429] ret_from_fork+0x116/0x1d0 [ 12.417446] ? __pfx_kthread+0x10/0x10 [ 12.417466] ret_from_fork_asm+0x1a/0x30 [ 12.417498] </TASK> [ 12.417507] [ 12.424569] Allocated by task 185: [ 12.424801] kasan_save_stack+0x45/0x70 [ 12.425058] kasan_save_track+0x18/0x40 [ 12.425259] kasan_save_alloc_info+0x3b/0x50 [ 12.425473] __kasan_kmalloc+0xb7/0xc0 [ 12.425655] __kmalloc_cache_noprof+0x189/0x420 [ 12.425895] kmalloc_uaf_16+0x15b/0x4c0 [ 12.426152] kunit_try_run_case+0x1a5/0x480 [ 12.426338] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.426562] kthread+0x337/0x6f0 [ 12.426712] ret_from_fork+0x116/0x1d0 [ 12.426953] ret_from_fork_asm+0x1a/0x30 [ 12.427093] [ 12.427161] Freed by task 185: [ 12.427320] kasan_save_stack+0x45/0x70 [ 12.427518] kasan_save_track+0x18/0x40 [ 12.428086] kasan_save_free_info+0x3f/0x60 [ 12.428306] __kasan_slab_free+0x56/0x70 [ 12.428488] kfree+0x222/0x3f0 [ 12.428605] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.428833] kunit_try_run_case+0x1a5/0x480 [ 12.429073] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.429330] kthread+0x337/0x6f0 [ 12.429478] ret_from_fork+0x116/0x1d0 [ 12.429635] ret_from_fork_asm+0x1a/0x30 [ 12.429899] [ 12.429990] The buggy address belongs to the object at ffff888102321e60 [ 12.429990] which belongs to the cache kmalloc-16 of size 16 [ 12.430511] The buggy address is located 0 bytes inside of [ 12.430511] freed 16-byte region [ffff888102321e60, ffff888102321e70) [ 12.431005] [ 12.431077] The buggy address belongs to the physical page: [ 12.431247] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102321 [ 12.431484] flags: 0x200000000000000(node=0|zone=2) [ 12.431684] page_type: f5(slab) [ 12.431850] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.432480] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.432870] page dumped because: kasan: bad access detected [ 12.433049] [ 12.433117] Memory state around the buggy address: [ 12.433269] ffff888102321d00: 00 05 fc fc 00 02 fc fc 00 03 fc fc fa fb fc fc [ 12.433480] ffff888102321d80: 00 02 fc fc 00 05 fc fc 00 02 fc fc 00 02 fc fc [ 12.434035] >ffff888102321e00: 00 02 fc fc 00 02 fc fc 00 00 fc fc fa fb fc fc [ 12.434363] ^ [ 12.434656] ffff888102321e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.435110] ffff888102321f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.435639] ==================================================================