Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.988202] ================================================================== [ 16.988312] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 16.988783] Read of size 1 at addr fff00000c3fbdda0 by task kunit_try_catch/192 [ 16.988857] [ 16.988918] CPU: 0 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.989079] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.989168] Hardware name: linux,dummy-virt (DT) [ 16.989308] Call trace: [ 16.989362] show_stack+0x20/0x38 (C) [ 16.989601] dump_stack_lvl+0x8c/0xd0 [ 16.989796] print_report+0x118/0x608 [ 16.989996] kasan_report+0xdc/0x128 [ 16.990069] __kasan_check_byte+0x54/0x70 [ 16.990332] kfree_sensitive+0x30/0xb0 [ 16.990392] kmalloc_double_kzfree+0x168/0x308 [ 16.990449] kunit_try_run_case+0x170/0x3f0 [ 16.990659] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.990727] kthread+0x328/0x630 [ 16.990769] ret_from_fork+0x10/0x20 [ 16.990839] [ 16.990857] Allocated by task 192: [ 16.990886] kasan_save_stack+0x3c/0x68 [ 16.990926] kasan_save_track+0x20/0x40 [ 16.990964] kasan_save_alloc_info+0x40/0x58 [ 16.991009] __kasan_kmalloc+0xd4/0xd8 [ 16.991448] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.991543] kmalloc_double_kzfree+0xb8/0x308 [ 16.991854] kunit_try_run_case+0x170/0x3f0 [ 16.992145] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.992392] kthread+0x328/0x630 [ 16.992507] ret_from_fork+0x10/0x20 [ 16.992578] [ 16.992650] Freed by task 192: [ 16.992803] kasan_save_stack+0x3c/0x68 [ 16.992965] kasan_save_track+0x20/0x40 [ 16.993084] kasan_save_free_info+0x4c/0x78 [ 16.993150] __kasan_slab_free+0x6c/0x98 [ 16.993439] kfree+0x214/0x3c8 [ 16.993665] kfree_sensitive+0x80/0xb0 [ 16.993833] kmalloc_double_kzfree+0x11c/0x308 [ 16.993960] kunit_try_run_case+0x170/0x3f0 [ 16.994154] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.994236] kthread+0x328/0x630 [ 16.994451] ret_from_fork+0x10/0x20 [ 16.994623] [ 16.994772] The buggy address belongs to the object at fff00000c3fbdda0 [ 16.994772] which belongs to the cache kmalloc-16 of size 16 [ 16.994874] The buggy address is located 0 bytes inside of [ 16.994874] freed 16-byte region [fff00000c3fbdda0, fff00000c3fbddb0) [ 16.995062] [ 16.995091] The buggy address belongs to the physical page: [ 16.995134] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103fbd [ 16.995343] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.995421] page_type: f5(slab) [ 16.995553] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.995940] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.996063] page dumped because: kasan: bad access detected [ 16.996229] [ 16.996285] Memory state around the buggy address: [ 16.996419] fff00000c3fbdc80: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 16.996675] fff00000c3fbdd00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.996740] >fff00000c3fbdd80: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 16.996894] ^ [ 16.996955] fff00000c3fbde00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.997222] fff00000c3fbde80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.997304] ==================================================================
[ 11.803741] ================================================================== [ 11.804358] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.804828] Read of size 1 at addr ffff888101745ec0 by task kunit_try_catch/210 [ 11.805129] [ 11.805299] CPU: 1 UID: 0 PID: 210 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.805344] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.805355] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.805376] Call Trace: [ 11.805388] <TASK> [ 11.805404] dump_stack_lvl+0x73/0xb0 [ 11.805433] print_report+0xd1/0x650 [ 11.805456] ? __virt_addr_valid+0x1db/0x2d0 [ 11.805479] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.805501] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.805522] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.805544] kasan_report+0x141/0x180 [ 11.805565] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.805590] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.805612] __kasan_check_byte+0x3d/0x50 [ 11.805633] kfree_sensitive+0x22/0x90 [ 11.805655] kmalloc_double_kzfree+0x19c/0x350 [ 11.805677] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.805699] ? __schedule+0x10cc/0x2b60 [ 11.805720] ? __pfx_read_tsc+0x10/0x10 [ 11.805741] ? ktime_get_ts64+0x86/0x230 [ 11.805765] kunit_try_run_case+0x1a5/0x480 [ 11.805789] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.805809] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.805831] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.805853] ? __kthread_parkme+0x82/0x180 [ 11.805873] ? preempt_count_sub+0x50/0x80 [ 11.805897] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.805920] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.805941] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.805962] kthread+0x337/0x6f0 [ 11.805981] ? trace_preempt_on+0x20/0xc0 [ 11.806003] ? __pfx_kthread+0x10/0x10 [ 11.806023] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.806042] ? calculate_sigpending+0x7b/0xa0 [ 11.806065] ? __pfx_kthread+0x10/0x10 [ 11.806085] ret_from_fork+0x116/0x1d0 [ 11.806116] ? __pfx_kthread+0x10/0x10 [ 11.806136] ret_from_fork_asm+0x1a/0x30 [ 11.806167] </TASK> [ 11.806179] [ 11.816371] Allocated by task 210: [ 11.816557] kasan_save_stack+0x45/0x70 [ 11.816731] kasan_save_track+0x18/0x40 [ 11.816889] kasan_save_alloc_info+0x3b/0x50 [ 11.817094] __kasan_kmalloc+0xb7/0xc0 [ 11.817378] __kmalloc_cache_noprof+0x189/0x420 [ 11.817625] kmalloc_double_kzfree+0xa9/0x350 [ 11.817779] kunit_try_run_case+0x1a5/0x480 [ 11.817959] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.818298] kthread+0x337/0x6f0 [ 11.818545] ret_from_fork+0x116/0x1d0 [ 11.818720] ret_from_fork_asm+0x1a/0x30 [ 11.818904] [ 11.818978] Freed by task 210: [ 11.819125] kasan_save_stack+0x45/0x70 [ 11.819270] kasan_save_track+0x18/0x40 [ 11.819405] kasan_save_free_info+0x3f/0x60 [ 11.819551] __kasan_slab_free+0x56/0x70 [ 11.819737] kfree+0x222/0x3f0 [ 11.819897] kfree_sensitive+0x67/0x90 [ 11.820118] kmalloc_double_kzfree+0x12b/0x350 [ 11.820403] kunit_try_run_case+0x1a5/0x480 [ 11.820618] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.820827] kthread+0x337/0x6f0 [ 11.820992] ret_from_fork+0x116/0x1d0 [ 11.821153] ret_from_fork_asm+0x1a/0x30 [ 11.821448] [ 11.821532] The buggy address belongs to the object at ffff888101745ec0 [ 11.821532] which belongs to the cache kmalloc-16 of size 16 [ 11.821939] The buggy address is located 0 bytes inside of [ 11.821939] freed 16-byte region [ffff888101745ec0, ffff888101745ed0) [ 11.822382] [ 11.822482] The buggy address belongs to the physical page: [ 11.822788] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101745 [ 11.823210] flags: 0x200000000000000(node=0|zone=2) [ 11.823560] page_type: f5(slab) [ 11.823722] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.824025] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.824444] page dumped because: kasan: bad access detected [ 11.824665] [ 11.824735] Memory state around the buggy address: [ 11.824924] ffff888101745d80: 00 01 fc fc 00 04 fc fc 00 04 fc fc 00 05 fc fc [ 11.825161] ffff888101745e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.826162] >ffff888101745e80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 11.826508] ^ [ 11.827914] ffff888101745f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.828170] ffff888101745f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.828392] ==================================================================