Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.380208] ================================================================== [ 18.380329] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 18.380401] Read of size 16 at addr fff00000c5d4da20 by task kunit_try_catch/169 [ 18.380472] [ 18.380518] CPU: 1 UID: 0 PID: 169 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.380609] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.380668] Hardware name: linux,dummy-virt (DT) [ 18.380704] Call trace: [ 18.380876] show_stack+0x20/0x38 (C) [ 18.380999] dump_stack_lvl+0x8c/0xd0 [ 18.381055] print_report+0x118/0x608 [ 18.381126] kasan_report+0xdc/0x128 [ 18.381208] __asan_report_load16_noabort+0x20/0x30 [ 18.381290] kmalloc_uaf_16+0x3bc/0x438 [ 18.381374] kunit_try_run_case+0x170/0x3f0 [ 18.381478] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.381536] kthread+0x328/0x630 [ 18.381581] ret_from_fork+0x10/0x20 [ 18.381654] [ 18.381707] Allocated by task 169: [ 18.381760] kasan_save_stack+0x3c/0x68 [ 18.381806] kasan_save_track+0x20/0x40 [ 18.381846] kasan_save_alloc_info+0x40/0x58 [ 18.381950] __kasan_kmalloc+0xd4/0xd8 [ 18.382000] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.382043] kmalloc_uaf_16+0x140/0x438 [ 18.382079] kunit_try_run_case+0x170/0x3f0 [ 18.382253] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.382398] kthread+0x328/0x630 [ 18.382471] ret_from_fork+0x10/0x20 [ 18.382626] [ 18.382667] Freed by task 169: [ 18.382718] kasan_save_stack+0x3c/0x68 [ 18.382782] kasan_save_track+0x20/0x40 [ 18.382822] kasan_save_free_info+0x4c/0x78 [ 18.382904] __kasan_slab_free+0x6c/0x98 [ 18.382945] kfree+0x214/0x3c8 [ 18.382998] kmalloc_uaf_16+0x190/0x438 [ 18.383037] kunit_try_run_case+0x170/0x3f0 [ 18.383104] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.383175] kthread+0x328/0x630 [ 18.383262] ret_from_fork+0x10/0x20 [ 18.383413] [ 18.383507] The buggy address belongs to the object at fff00000c5d4da20 [ 18.383507] which belongs to the cache kmalloc-16 of size 16 [ 18.383588] The buggy address is located 0 bytes inside of [ 18.383588] freed 16-byte region [fff00000c5d4da20, fff00000c5d4da30) [ 18.383655] [ 18.383677] The buggy address belongs to the physical page: [ 18.383712] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d4d [ 18.383774] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.383830] page_type: f5(slab) [ 18.383932] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.384220] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.384308] page dumped because: kasan: bad access detected [ 18.384398] [ 18.384418] Memory state around the buggy address: [ 18.384482] fff00000c5d4d900: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.384571] fff00000c5d4d980: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.384618] >fff00000c5d4da00: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 18.384726] ^ [ 18.384794] fff00000c5d4da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.384909] fff00000c5d4db00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.384985] ==================================================================
[ 11.553231] ================================================================== [ 11.553684] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.554341] Read of size 16 at addr ffff88810228a860 by task kunit_try_catch/185 [ 11.554715] [ 11.554829] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.554875] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.554887] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.554908] Call Trace: [ 11.554921] <TASK> [ 11.554937] dump_stack_lvl+0x73/0xb0 [ 11.554967] print_report+0xd1/0x650 [ 11.554990] ? __virt_addr_valid+0x1db/0x2d0 [ 11.555013] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.555032] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.555052] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.555072] kasan_report+0x141/0x180 [ 11.555092] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.555116] __asan_report_load16_noabort+0x18/0x20 [ 11.555139] kmalloc_uaf_16+0x47b/0x4c0 [ 11.555160] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.555182] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.555206] kunit_try_run_case+0x1a5/0x480 [ 11.555231] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.555252] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.555276] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.555297] ? __kthread_parkme+0x82/0x180 [ 11.555317] ? preempt_count_sub+0x50/0x80 [ 11.555342] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.555366] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.555400] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.555423] kthread+0x337/0x6f0 [ 11.555442] ? trace_preempt_on+0x20/0xc0 [ 11.555467] ? __pfx_kthread+0x10/0x10 [ 11.555487] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.555509] ? calculate_sigpending+0x7b/0xa0 [ 11.555531] ? __pfx_kthread+0x10/0x10 [ 11.555551] ret_from_fork+0x116/0x1d0 [ 11.555647] ? __pfx_kthread+0x10/0x10 [ 11.555671] ret_from_fork_asm+0x1a/0x30 [ 11.555703] </TASK> [ 11.555716] [ 11.563177] Allocated by task 185: [ 11.563366] kasan_save_stack+0x45/0x70 [ 11.563536] kasan_save_track+0x18/0x40 [ 11.563670] kasan_save_alloc_info+0x3b/0x50 [ 11.563854] __kasan_kmalloc+0xb7/0xc0 [ 11.564039] __kmalloc_cache_noprof+0x189/0x420 [ 11.564352] kmalloc_uaf_16+0x15b/0x4c0 [ 11.564581] kunit_try_run_case+0x1a5/0x480 [ 11.564762] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.564955] kthread+0x337/0x6f0 [ 11.565124] ret_from_fork+0x116/0x1d0 [ 11.565318] ret_from_fork_asm+0x1a/0x30 [ 11.565486] [ 11.565564] Freed by task 185: [ 11.566033] kasan_save_stack+0x45/0x70 [ 11.566239] kasan_save_track+0x18/0x40 [ 11.566435] kasan_save_free_info+0x3f/0x60 [ 11.566657] __kasan_slab_free+0x56/0x70 [ 11.566823] kfree+0x222/0x3f0 [ 11.567059] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.567199] kunit_try_run_case+0x1a5/0x480 [ 11.567343] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.567607] kthread+0x337/0x6f0 [ 11.567780] ret_from_fork+0x116/0x1d0 [ 11.567943] ret_from_fork_asm+0x1a/0x30 [ 11.568208] [ 11.568307] The buggy address belongs to the object at ffff88810228a860 [ 11.568307] which belongs to the cache kmalloc-16 of size 16 [ 11.568689] The buggy address is located 0 bytes inside of [ 11.568689] freed 16-byte region [ffff88810228a860, ffff88810228a870) [ 11.569337] [ 11.569448] The buggy address belongs to the physical page: [ 11.569971] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10228a [ 11.570368] flags: 0x200000000000000(node=0|zone=2) [ 11.570585] page_type: f5(slab) [ 11.570758] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.571159] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.571422] page dumped because: kasan: bad access detected [ 11.571618] [ 11.571721] Memory state around the buggy address: [ 11.572006] ffff88810228a700: fa fb fc fc 00 02 fc fc 00 05 fc fc 00 02 fc fc [ 11.572325] ffff88810228a780: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc [ 11.572562] >ffff88810228a800: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 11.572889] ^ [ 11.573517] ffff88810228a880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.573821] ffff88810228a900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.574182] ==================================================================