Date
May 15, 2025, 10:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.221352] ================================================================== [ 18.221471] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 18.221541] Read of size 1 at addr fff00000c5ccd320 by task kunit_try_catch/192 [ 18.221590] [ 18.222037] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT [ 18.222425] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.222636] Hardware name: linux,dummy-virt (DT) [ 18.222777] Call trace: [ 18.222801] show_stack+0x20/0x38 (C) [ 18.223212] dump_stack_lvl+0x8c/0xd0 [ 18.223674] print_report+0x118/0x608 [ 18.223799] kasan_report+0xdc/0x128 [ 18.223952] __kasan_check_byte+0x54/0x70 [ 18.224172] kfree_sensitive+0x30/0xb0 [ 18.224402] kmalloc_double_kzfree+0x168/0x308 [ 18.224612] kunit_try_run_case+0x170/0x3f0 [ 18.224901] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.224973] kthread+0x328/0x630 [ 18.225466] ret_from_fork+0x10/0x20 [ 18.225943] [ 18.225996] Allocated by task 192: [ 18.226070] kasan_save_stack+0x3c/0x68 [ 18.226131] kasan_save_track+0x20/0x40 [ 18.226199] kasan_save_alloc_info+0x40/0x58 [ 18.226603] __kasan_kmalloc+0xd4/0xd8 [ 18.226710] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.227002] kmalloc_double_kzfree+0xb8/0x308 [ 18.227194] kunit_try_run_case+0x170/0x3f0 [ 18.227345] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.227608] kthread+0x328/0x630 [ 18.228145] ret_from_fork+0x10/0x20 [ 18.228362] [ 18.228596] Freed by task 192: [ 18.228695] kasan_save_stack+0x3c/0x68 [ 18.228834] kasan_save_track+0x20/0x40 [ 18.228932] kasan_save_free_info+0x4c/0x78 [ 18.229052] __kasan_slab_free+0x6c/0x98 [ 18.229209] kfree+0x214/0x3c8 [ 18.229592] kfree_sensitive+0x80/0xb0 [ 18.229860] kmalloc_double_kzfree+0x11c/0x308 [ 18.230171] kunit_try_run_case+0x170/0x3f0 [ 18.230411] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.230643] kthread+0x328/0x630 [ 18.230780] ret_from_fork+0x10/0x20 [ 18.230866] [ 18.230936] The buggy address belongs to the object at fff00000c5ccd320 [ 18.230936] which belongs to the cache kmalloc-16 of size 16 [ 18.231406] The buggy address is located 0 bytes inside of [ 18.231406] freed 16-byte region [fff00000c5ccd320, fff00000c5ccd330) [ 18.231516] [ 18.231562] The buggy address belongs to the physical page: [ 18.231793] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105ccd [ 18.231940] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.232270] page_type: f5(slab) [ 18.232469] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.232550] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.232678] page dumped because: kasan: bad access detected [ 18.232864] [ 18.232955] Memory state around the buggy address: [ 18.233305] fff00000c5ccd200: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 18.233421] fff00000c5ccd280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.233581] >fff00000c5ccd300: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 18.233658] ^ [ 18.233801] fff00000c5ccd380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.234099] fff00000c5ccd400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.234305] ==================================================================
[ 14.450150] ================================================================== [ 14.451403] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 14.451962] Read of size 1 at addr ffff888102817b60 by task kunit_try_catch/210 [ 14.452682] [ 14.452853] CPU: 0 UID: 0 PID: 210 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) [ 14.452964] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.452987] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.453025] Call Trace: [ 14.453052] <TASK> [ 14.453092] dump_stack_lvl+0x73/0xb0 [ 14.453168] print_report+0xd1/0x650 [ 14.453216] ? __virt_addr_valid+0x1db/0x2d0 [ 14.453271] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.453298] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.453322] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.453346] kasan_report+0x141/0x180 [ 14.453369] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.453396] ? kmalloc_double_kzfree+0x19c/0x350 [ 14.453420] __kasan_check_byte+0x3d/0x50 [ 14.453443] kfree_sensitive+0x22/0x90 [ 14.453467] kmalloc_double_kzfree+0x19c/0x350 [ 14.453490] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 14.453515] ? __schedule+0x10cc/0x2b60 [ 14.453537] ? __pfx_read_tsc+0x10/0x10 [ 14.453559] ? ktime_get_ts64+0x86/0x230 [ 14.453584] kunit_try_run_case+0x1a5/0x480 [ 14.453610] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.453632] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.453656] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.453679] ? __kthread_parkme+0x82/0x180 [ 14.453702] ? preempt_count_sub+0x50/0x80 [ 14.453726] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.453750] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.453773] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.453796] kthread+0x337/0x6f0 [ 14.453815] ? trace_preempt_on+0x20/0xc0 [ 14.453839] ? __pfx_kthread+0x10/0x10 [ 14.453860] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.453880] ? calculate_sigpending+0x7b/0xa0 [ 14.453906] ? __pfx_kthread+0x10/0x10 [ 14.453928] ret_from_fork+0x116/0x1d0 [ 14.453946] ? __pfx_kthread+0x10/0x10 [ 14.453967] ret_from_fork_asm+0x1a/0x30 [ 14.453999] </TASK> [ 14.454011] [ 14.462562] Allocated by task 210: [ 14.462896] kasan_save_stack+0x45/0x70 [ 14.463253] kasan_save_track+0x18/0x40 [ 14.463563] kasan_save_alloc_info+0x3b/0x50 [ 14.463914] __kasan_kmalloc+0xb7/0xc0 [ 14.464241] __kmalloc_cache_noprof+0x189/0x420 [ 14.464484] kmalloc_double_kzfree+0xa9/0x350 [ 14.464682] kunit_try_run_case+0x1a5/0x480 [ 14.465032] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.465461] kthread+0x337/0x6f0 [ 14.465699] ret_from_fork+0x116/0x1d0 [ 14.465910] ret_from_fork_asm+0x1a/0x30 [ 14.466216] [ 14.466407] Freed by task 210: [ 14.466600] kasan_save_stack+0x45/0x70 [ 14.466784] kasan_save_track+0x18/0x40 [ 14.466962] kasan_save_free_info+0x3f/0x60 [ 14.467143] __kasan_slab_free+0x56/0x70 [ 14.467452] kfree+0x222/0x3f0 [ 14.467735] kfree_sensitive+0x67/0x90 [ 14.468049] kmalloc_double_kzfree+0x12b/0x350 [ 14.468409] kunit_try_run_case+0x1a5/0x480 [ 14.468747] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.469163] kthread+0x337/0x6f0 [ 14.469461] ret_from_fork+0x116/0x1d0 [ 14.469725] ret_from_fork_asm+0x1a/0x30 [ 14.469916] [ 14.470027] The buggy address belongs to the object at ffff888102817b60 [ 14.470027] which belongs to the cache kmalloc-16 of size 16 [ 14.470855] The buggy address is located 0 bytes inside of [ 14.470855] freed 16-byte region [ffff888102817b60, ffff888102817b70) [ 14.471530] [ 14.471722] The buggy address belongs to the physical page: [ 14.471949] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102817 [ 14.472507] flags: 0x200000000000000(node=0|zone=2) [ 14.472871] page_type: f5(slab) [ 14.473074] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 14.473492] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 14.473905] page dumped because: kasan: bad access detected [ 14.474254] [ 14.474423] Memory state around the buggy address: [ 14.474729] ffff888102817a00: 00 02 fc fc 00 05 fc fc 00 02 fc fc 00 02 fc fc [ 14.475095] ffff888102817a80: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 14.475543] >ffff888102817b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 14.475840] ^ [ 14.476263] ffff888102817b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.476630] ffff888102817c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.476927] ==================================================================