Date
July 1, 2025, 11:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.537019] ================================================================== [ 18.537123] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 18.537214] Read of size 1 at addr fff00000c5d4da60 by task kunit_try_catch/193 [ 18.537361] [ 18.537409] CPU: 1 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.537548] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.537577] Hardware name: linux,dummy-virt (DT) [ 18.537652] Call trace: [ 18.537681] show_stack+0x20/0x38 (C) [ 18.537738] dump_stack_lvl+0x8c/0xd0 [ 18.537810] print_report+0x118/0x608 [ 18.537862] kasan_report+0xdc/0x128 [ 18.537912] __kasan_check_byte+0x54/0x70 [ 18.537962] kfree_sensitive+0x30/0xb0 [ 18.538050] kmalloc_double_kzfree+0x168/0x308 [ 18.538285] kunit_try_run_case+0x170/0x3f0 [ 18.538344] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.538434] kthread+0x328/0x630 [ 18.538483] ret_from_fork+0x10/0x20 [ 18.538551] [ 18.538594] Allocated by task 193: [ 18.538655] kasan_save_stack+0x3c/0x68 [ 18.538704] kasan_save_track+0x20/0x40 [ 18.538763] kasan_save_alloc_info+0x40/0x58 [ 18.538837] __kasan_kmalloc+0xd4/0xd8 [ 18.538879] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.538921] kmalloc_double_kzfree+0xb8/0x308 [ 18.538984] kunit_try_run_case+0x170/0x3f0 [ 18.539055] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.539115] kthread+0x328/0x630 [ 18.539175] ret_from_fork+0x10/0x20 [ 18.539262] [ 18.539296] Freed by task 193: [ 18.539365] kasan_save_stack+0x3c/0x68 [ 18.539409] kasan_save_track+0x20/0x40 [ 18.539448] kasan_save_free_info+0x4c/0x78 [ 18.539491] __kasan_slab_free+0x6c/0x98 [ 18.539532] kfree+0x214/0x3c8 [ 18.539894] kfree_sensitive+0x80/0xb0 [ 18.540052] kmalloc_double_kzfree+0x11c/0x308 [ 18.540155] kunit_try_run_case+0x170/0x3f0 [ 18.540282] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.540418] kthread+0x328/0x630 [ 18.540495] ret_from_fork+0x10/0x20 [ 18.540578] [ 18.540654] The buggy address belongs to the object at fff00000c5d4da60 [ 18.540654] which belongs to the cache kmalloc-16 of size 16 [ 18.540778] The buggy address is located 0 bytes inside of [ 18.540778] freed 16-byte region [fff00000c5d4da60, fff00000c5d4da70) [ 18.540932] [ 18.541019] The buggy address belongs to the physical page: [ 18.541059] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d4d [ 18.541124] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.541195] page_type: f5(slab) [ 18.541475] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.541636] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.541804] page dumped because: kasan: bad access detected [ 18.541881] [ 18.541997] Memory state around the buggy address: [ 18.542106] fff00000c5d4d900: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.542266] fff00000c5d4d980: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.542347] >fff00000c5d4da00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.542476] ^ [ 18.542542] fff00000c5d4da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.542612] fff00000c5d4db00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.542897] ==================================================================
[ 11.820831] ================================================================== [ 11.822207] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.823270] Read of size 1 at addr ffff88810228a880 by task kunit_try_catch/209 [ 11.823652] [ 11.823752] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.823803] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.823815] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.823836] Call Trace: [ 11.823850] <TASK> [ 11.823869] dump_stack_lvl+0x73/0xb0 [ 11.823903] print_report+0xd1/0x650 [ 11.823926] ? __virt_addr_valid+0x1db/0x2d0 [ 11.823949] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.823971] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.823991] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.824014] kasan_report+0x141/0x180 [ 11.824035] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.824060] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.824081] __kasan_check_byte+0x3d/0x50 [ 11.824102] kfree_sensitive+0x22/0x90 [ 11.824124] kmalloc_double_kzfree+0x19c/0x350 [ 11.824145] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.824167] ? __schedule+0x10cc/0x2b60 [ 11.824189] ? __pfx_read_tsc+0x10/0x10 [ 11.824209] ? ktime_get_ts64+0x86/0x230 [ 11.824233] kunit_try_run_case+0x1a5/0x480 [ 11.824257] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.824278] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.824302] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.824323] ? __kthread_parkme+0x82/0x180 [ 11.824343] ? preempt_count_sub+0x50/0x80 [ 11.824367] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.824406] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.824428] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.824449] kthread+0x337/0x6f0 [ 11.824468] ? trace_preempt_on+0x20/0xc0 [ 11.824490] ? __pfx_kthread+0x10/0x10 [ 11.824509] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.824528] ? calculate_sigpending+0x7b/0xa0 [ 11.824551] ? __pfx_kthread+0x10/0x10 [ 11.824571] ret_from_fork+0x116/0x1d0 [ 11.824588] ? __pfx_kthread+0x10/0x10 [ 11.824608] ret_from_fork_asm+0x1a/0x30 [ 11.824638] </TASK> [ 11.824650] [ 11.837641] Allocated by task 209: [ 11.838247] kasan_save_stack+0x45/0x70 [ 11.838575] kasan_save_track+0x18/0x40 [ 11.838932] kasan_save_alloc_info+0x3b/0x50 [ 11.839260] __kasan_kmalloc+0xb7/0xc0 [ 11.839431] __kmalloc_cache_noprof+0x189/0x420 [ 11.839727] kmalloc_double_kzfree+0xa9/0x350 [ 11.839992] kunit_try_run_case+0x1a5/0x480 [ 11.840171] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.840411] kthread+0x337/0x6f0 [ 11.840547] ret_from_fork+0x116/0x1d0 [ 11.840812] ret_from_fork_asm+0x1a/0x30 [ 11.841024] [ 11.841155] Freed by task 209: [ 11.841332] kasan_save_stack+0x45/0x70 [ 11.841540] kasan_save_track+0x18/0x40 [ 11.841725] kasan_save_free_info+0x3f/0x60 [ 11.841951] __kasan_slab_free+0x56/0x70 [ 11.842422] kfree+0x222/0x3f0 [ 11.842604] kfree_sensitive+0x67/0x90 [ 11.842776] kmalloc_double_kzfree+0x12b/0x350 [ 11.842973] kunit_try_run_case+0x1a5/0x480 [ 11.843301] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.843610] kthread+0x337/0x6f0 [ 11.843765] ret_from_fork+0x116/0x1d0 [ 11.843899] ret_from_fork_asm+0x1a/0x30 [ 11.844177] [ 11.844301] The buggy address belongs to the object at ffff88810228a880 [ 11.844301] which belongs to the cache kmalloc-16 of size 16 [ 11.844775] The buggy address is located 0 bytes inside of [ 11.844775] freed 16-byte region [ffff88810228a880, ffff88810228a890) [ 11.845527] [ 11.845649] The buggy address belongs to the physical page: [ 11.845907] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10228a [ 11.846465] flags: 0x200000000000000(node=0|zone=2) [ 11.846826] page_type: f5(slab) [ 11.847000] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.847443] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.847950] page dumped because: kasan: bad access detected [ 11.848145] [ 11.848241] Memory state around the buggy address: [ 11.848489] ffff88810228a780: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc [ 11.848958] ffff88810228a800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.849185] >ffff88810228a880: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.849482] ^ [ 11.849668] ffff88810228a900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.850267] ffff88810228a980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.850552] ==================================================================