Date
June 16, 2025, 7:07 a.m.
Environment | |
---|---|
qemu-arm64 | |
qemu-x86_64 |
[ 19.577949] ================================================================== [ 19.578481] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.579163] Read of size 1 at addr fff00000c63971c0 by task kunit_try_catch/201 [ 19.579551] [ 19.579910] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 19.580135] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.580197] Hardware name: linux,dummy-virt (DT) [ 19.580270] Call trace: [ 19.580323] show_stack+0x20/0x38 (C) [ 19.580443] dump_stack_lvl+0x8c/0xd0 [ 19.580547] print_report+0x118/0x608 [ 19.580653] kasan_report+0xdc/0x128 [ 19.580752] __kasan_check_byte+0x54/0x70 [ 19.582446] kfree_sensitive+0x30/0xb0 [ 19.582710] kmalloc_double_kzfree+0x168/0x308 [ 19.583102] kunit_try_run_case+0x170/0x3f0 [ 19.583341] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.584201] kthread+0x328/0x630 [ 19.584476] ret_from_fork+0x10/0x20 [ 19.584623] [ 19.584730] Allocated by task 201: [ 19.584893] kasan_save_stack+0x3c/0x68 [ 19.585069] kasan_save_track+0x20/0x40 [ 19.585212] kasan_save_alloc_info+0x40/0x58 [ 19.585307] __kasan_kmalloc+0xd4/0xd8 [ 19.585577] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.585688] kmalloc_double_kzfree+0xb8/0x308 [ 19.586253] kunit_try_run_case+0x170/0x3f0 [ 19.586399] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.586749] kthread+0x328/0x630 [ 19.587141] ret_from_fork+0x10/0x20 [ 19.587278] [ 19.587326] Freed by task 201: [ 19.587651] kasan_save_stack+0x3c/0x68 [ 19.587779] kasan_save_track+0x20/0x40 [ 19.587878] kasan_save_free_info+0x4c/0x78 [ 19.587972] __kasan_slab_free+0x6c/0x98 [ 19.588059] kfree+0x214/0x3c8 [ 19.588139] kfree_sensitive+0x80/0xb0 [ 19.588223] kmalloc_double_kzfree+0x11c/0x308 [ 19.588317] kunit_try_run_case+0x170/0x3f0 [ 19.588407] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.588515] kthread+0x328/0x630 [ 19.588594] ret_from_fork+0x10/0x20 [ 19.588675] [ 19.588723] The buggy address belongs to the object at fff00000c63971c0 [ 19.588723] which belongs to the cache kmalloc-16 of size 16 [ 19.589567] The buggy address is located 0 bytes inside of [ 19.589567] freed 16-byte region [fff00000c63971c0, fff00000c63971d0) [ 19.589931] [ 19.590008] The buggy address belongs to the physical page: [ 19.590166] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106397 [ 19.590533] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.590814] page_type: f5(slab) [ 19.591907] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.592124] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.592517] page dumped because: kasan: bad access detected [ 19.592868] [ 19.592932] Memory state around the buggy address: [ 19.593016] fff00000c6397080: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 19.593110] fff00000c6397100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.593213] >fff00000c6397180: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 19.593779] ^ [ 19.593989] fff00000c6397200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.594583] fff00000c6397280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.594859] ==================================================================
[ 11.793971] ================================================================== [ 11.794413] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.794640] Read of size 1 at addr ffff888102225de0 by task kunit_try_catch/217 [ 11.794844] [ 11.794926] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 11.794987] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.794998] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.795018] Call Trace: [ 11.795029] <TASK> [ 11.795047] dump_stack_lvl+0x73/0xb0 [ 11.795075] print_report+0xd1/0x650 [ 11.795096] ? __virt_addr_valid+0x1db/0x2d0 [ 11.795118] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.795139] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.795160] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.795182] kasan_report+0x141/0x180 [ 11.795202] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.795226] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.795247] __kasan_check_byte+0x3d/0x50 [ 11.795267] kfree_sensitive+0x22/0x90 [ 11.795289] kmalloc_double_kzfree+0x19c/0x350 [ 11.795309] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.795332] ? __schedule+0x10cc/0x2b60 [ 11.795352] ? __pfx_read_tsc+0x10/0x10 [ 11.795372] ? ktime_get_ts64+0x86/0x230 [ 11.795396] kunit_try_run_case+0x1a5/0x480 [ 11.795419] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.795439] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.795460] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.795481] ? __kthread_parkme+0x82/0x180 [ 11.795502] ? preempt_count_sub+0x50/0x80 [ 11.795524] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.795547] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.795568] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.795589] kthread+0x337/0x6f0 [ 11.795608] ? trace_preempt_on+0x20/0xc0 [ 11.795631] ? __pfx_kthread+0x10/0x10 [ 11.795651] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.795670] ? calculate_sigpending+0x7b/0xa0 [ 11.795693] ? __pfx_kthread+0x10/0x10 [ 11.795713] ret_from_fork+0x116/0x1d0 [ 11.795731] ? __pfx_kthread+0x10/0x10 [ 11.795751] ret_from_fork_asm+0x1a/0x30 [ 11.795780] </TASK> [ 11.795790] [ 11.816159] Allocated by task 217: [ 11.816303] kasan_save_stack+0x45/0x70 [ 11.816458] kasan_save_track+0x18/0x40 [ 11.816587] kasan_save_alloc_info+0x3b/0x50 [ 11.816727] __kasan_kmalloc+0xb7/0xc0 [ 11.816850] __kmalloc_cache_noprof+0x189/0x420 [ 11.817043] kmalloc_double_kzfree+0xa9/0x350 [ 11.817252] kunit_try_run_case+0x1a5/0x480 [ 11.817534] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.817981] kthread+0x337/0x6f0 [ 11.818160] ret_from_fork+0x116/0x1d0 [ 11.818336] ret_from_fork_asm+0x1a/0x30 [ 11.818682] [ 11.818781] Freed by task 217: [ 11.818941] kasan_save_stack+0x45/0x70 [ 11.819176] kasan_save_track+0x18/0x40 [ 11.819531] kasan_save_free_info+0x3f/0x60 [ 11.819709] __kasan_slab_free+0x56/0x70 [ 11.819862] kfree+0x222/0x3f0 [ 11.820209] kfree_sensitive+0x67/0x90 [ 11.820515] kmalloc_double_kzfree+0x12b/0x350 [ 11.820867] kunit_try_run_case+0x1a5/0x480 [ 11.821021] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.821228] kthread+0x337/0x6f0 [ 11.821815] ret_from_fork+0x116/0x1d0 [ 11.822028] ret_from_fork_asm+0x1a/0x30 [ 11.822302] [ 11.822395] The buggy address belongs to the object at ffff888102225de0 [ 11.822395] which belongs to the cache kmalloc-16 of size 16 [ 11.822999] The buggy address is located 0 bytes inside of [ 11.822999] freed 16-byte region [ffff888102225de0, ffff888102225df0) [ 11.823671] [ 11.823783] The buggy address belongs to the physical page: [ 11.824089] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102225 [ 11.824534] flags: 0x200000000000000(node=0|zone=2) [ 11.824836] page_type: f5(slab) [ 11.824976] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.825311] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.825756] page dumped because: kasan: bad access detected [ 11.826020] [ 11.826158] Memory state around the buggy address: [ 11.826696] ffff888102225c80: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.826997] ffff888102225d00: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.827331] >ffff888102225d80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.827692] ^ [ 11.827990] ffff888102225e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.828366] ffff888102225e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.828788] ==================================================================