Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.450420] ================================================================== [ 18.450500] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 18.450567] Read of size 1 at addr fff00000c4473be0 by task kunit_try_catch/192 [ 18.450630] [ 18.450676] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 18.450766] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.450793] Hardware name: linux,dummy-virt (DT) [ 18.450834] Call trace: [ 18.450868] show_stack+0x20/0x38 (C) [ 18.450919] dump_stack_lvl+0x8c/0xd0 [ 18.450968] print_report+0x118/0x608 [ 18.451015] kasan_report+0xdc/0x128 [ 18.451061] __kasan_check_byte+0x54/0x70 [ 18.451118] kfree_sensitive+0x30/0xb0 [ 18.451165] kmalloc_double_kzfree+0x168/0x308 [ 18.451217] kunit_try_run_case+0x170/0x3f0 [ 18.451267] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.451319] kthread+0x328/0x630 [ 18.451410] ret_from_fork+0x10/0x20 [ 18.451471] [ 18.451489] Allocated by task 192: [ 18.451518] kasan_save_stack+0x3c/0x68 [ 18.451558] kasan_save_track+0x20/0x40 [ 18.451596] kasan_save_alloc_info+0x40/0x58 [ 18.451669] __kasan_kmalloc+0xd4/0xd8 [ 18.451709] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.451759] kmalloc_double_kzfree+0xb8/0x308 [ 18.451798] kunit_try_run_case+0x170/0x3f0 [ 18.451835] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.451904] kthread+0x328/0x630 [ 18.451937] ret_from_fork+0x10/0x20 [ 18.451984] [ 18.452002] Freed by task 192: [ 18.452030] kasan_save_stack+0x3c/0x68 [ 18.452069] kasan_save_track+0x20/0x40 [ 18.452131] kasan_save_free_info+0x4c/0x78 [ 18.452170] __kasan_slab_free+0x6c/0x98 [ 18.452490] kfree+0x214/0x3c8 [ 18.452528] kfree_sensitive+0x80/0xb0 [ 18.452564] kmalloc_double_kzfree+0x11c/0x308 [ 18.452601] kunit_try_run_case+0x170/0x3f0 [ 18.452639] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.452683] kthread+0x328/0x630 [ 18.452714] ret_from_fork+0x10/0x20 [ 18.452748] [ 18.452769] The buggy address belongs to the object at fff00000c4473be0 [ 18.452769] which belongs to the cache kmalloc-16 of size 16 [ 18.452832] The buggy address is located 0 bytes inside of [ 18.452832] freed 16-byte region [fff00000c4473be0, fff00000c4473bf0) [ 18.452892] [ 18.452913] The buggy address belongs to the physical page: [ 18.452946] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104473 [ 18.452998] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.453050] page_type: f5(slab) [ 18.453091] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.453140] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.453180] page dumped because: kasan: bad access detected [ 18.453212] [ 18.453229] Memory state around the buggy address: [ 18.453263] fff00000c4473a80: fa fb fc fc 00 01 fc fc fa fb fc fc fa fb fc fc [ 18.453306] fff00000c4473b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.453348] >fff00000c4473b80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.453386] ^ [ 18.453433] fff00000c4473c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.453514] fff00000c4473c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.453574] ==================================================================
[ 14.970130] ================================================================== [ 14.971473] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 14.972209] Read of size 1 at addr ffff888102380980 by task kunit_try_catch/209 [ 14.972652] [ 14.973193] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 14.973279] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.973294] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.973321] Call Trace: [ 14.973339] <TASK> [ 14.973365] dump_stack_lvl+0x73/0xb0 [ 14.973407] print_report+0xd1/0x650 [ 14.973435] ? __virt_addr_valid+0x1db/0x2d0 [ 14.973487] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.973528] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.973568] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.973614] kasan_report+0x141/0x180 [ 14.973658] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.973708] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.973756] __kasan_check_byte+0x3d/0x50 [ 14.973802] kfree_sensitive+0x22/0x90 [ 14.973849] kmalloc_double_kzfree+0x19c/0x350 [ 14.973896] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 14.973946] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 14.974023] kunit_try_run_case+0x1a5/0x480 [ 14.974297] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.974368] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.974433] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.974484] ? __kthread_parkme+0x82/0x180 [ 14.974513] ? preempt_count_sub+0x50/0x80 [ 14.974540] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.974562] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.974590] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.974616] kthread+0x337/0x6f0 [ 14.974637] ? trace_preempt_on+0x20/0xc0 [ 14.974664] ? __pfx_kthread+0x10/0x10 [ 14.974695] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.974761] ? calculate_sigpending+0x7b/0xa0 [ 14.974805] ? __pfx_kthread+0x10/0x10 [ 14.974842] ret_from_fork+0x116/0x1d0 [ 14.974866] ? __pfx_kthread+0x10/0x10 [ 14.974889] ret_from_fork_asm+0x1a/0x30 [ 14.974925] </TASK> [ 14.974938] [ 14.990788] Allocated by task 209: [ 14.991546] kasan_save_stack+0x45/0x70 [ 14.992036] kasan_save_track+0x18/0x40 [ 14.992486] kasan_save_alloc_info+0x3b/0x50 [ 14.992982] __kasan_kmalloc+0xb7/0xc0 [ 14.993187] __kmalloc_cache_noprof+0x189/0x420 [ 14.994151] kmalloc_double_kzfree+0xa9/0x350 [ 14.994419] kunit_try_run_case+0x1a5/0x480 [ 14.994605] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.995297] kthread+0x337/0x6f0 [ 14.995803] ret_from_fork+0x116/0x1d0 [ 14.996374] ret_from_fork_asm+0x1a/0x30 [ 14.996803] [ 14.997000] Freed by task 209: [ 14.997388] kasan_save_stack+0x45/0x70 [ 14.998243] kasan_save_track+0x18/0x40 [ 14.998667] kasan_save_free_info+0x3f/0x60 [ 14.999365] __kasan_slab_free+0x56/0x70 [ 14.999947] kfree+0x222/0x3f0 [ 15.000201] kfree_sensitive+0x67/0x90 [ 15.000665] kmalloc_double_kzfree+0x12b/0x350 [ 15.001031] kunit_try_run_case+0x1a5/0x480 [ 15.001628] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.002523] kthread+0x337/0x6f0 [ 15.002829] ret_from_fork+0x116/0x1d0 [ 15.003142] ret_from_fork_asm+0x1a/0x30 [ 15.003495] [ 15.003733] The buggy address belongs to the object at ffff888102380980 [ 15.003733] which belongs to the cache kmalloc-16 of size 16 [ 15.004726] The buggy address is located 0 bytes inside of [ 15.004726] freed 16-byte region [ffff888102380980, ffff888102380990) [ 15.005822] [ 15.006023] The buggy address belongs to the physical page: [ 15.006265] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102380 [ 15.006984] flags: 0x200000000000000(node=0|zone=2) [ 15.007221] page_type: f5(slab) [ 15.007405] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 15.008865] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.009137] page dumped because: kasan: bad access detected [ 15.009344] [ 15.009447] Memory state around the buggy address: [ 15.009665] ffff888102380880: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 15.009920] ffff888102380900: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 15.010176] >ffff888102380980: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.011517] ^ [ 15.011715] ffff888102380a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.014258] ffff888102380a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.015108] ==================================================================