Date
June 23, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.257662] ================================================================== [ 33.257781] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 33.257911] Read of size 1 at addr fff00000c56f1320 by task kunit_try_catch/204 [ 33.258044] [ 33.258121] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT [ 33.258317] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.258376] Hardware name: linux,dummy-virt (DT) [ 33.258448] Call trace: [ 33.258500] show_stack+0x20/0x38 (C) [ 33.258616] dump_stack_lvl+0x8c/0xd0 [ 33.258733] print_report+0x118/0x608 [ 33.258857] kasan_report+0xdc/0x128 [ 33.258971] __kasan_check_byte+0x54/0x70 [ 33.259153] kfree_sensitive+0x30/0xb0 [ 33.259327] kmalloc_double_kzfree+0x168/0x308 [ 33.259562] kunit_try_run_case+0x170/0x3f0 [ 33.259705] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.259845] kthread+0x328/0x630 [ 33.260140] ret_from_fork+0x10/0x20 [ 33.260271] [ 33.260316] Allocated by task 204: [ 33.260391] kasan_save_stack+0x3c/0x68 [ 33.260488] kasan_save_track+0x20/0x40 [ 33.260582] kasan_save_alloc_info+0x40/0x58 [ 33.260689] __kasan_kmalloc+0xd4/0xd8 [ 33.260886] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.260996] kmalloc_double_kzfree+0xb8/0x308 [ 33.261120] kunit_try_run_case+0x170/0x3f0 [ 33.261428] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.261749] kthread+0x328/0x630 [ 33.261847] ret_from_fork+0x10/0x20 [ 33.262185] [ 33.262233] Freed by task 204: [ 33.262982] kasan_save_stack+0x3c/0x68 [ 33.263210] kasan_save_track+0x20/0x40 [ 33.263358] kasan_save_free_info+0x4c/0x78 [ 33.263616] __kasan_slab_free+0x6c/0x98 [ 33.263714] kfree+0x214/0x3c8 [ 33.263853] kfree_sensitive+0x80/0xb0 [ 33.263959] kmalloc_double_kzfree+0x11c/0x308 [ 33.264296] kunit_try_run_case+0x170/0x3f0 [ 33.264674] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.265107] kthread+0x328/0x630 [ 33.265196] ret_from_fork+0x10/0x20 [ 33.265970] [ 33.266022] The buggy address belongs to the object at fff00000c56f1320 [ 33.266022] which belongs to the cache kmalloc-16 of size 16 [ 33.266263] The buggy address is located 0 bytes inside of [ 33.266263] freed 16-byte region [fff00000c56f1320, fff00000c56f1330) [ 33.266463] [ 33.266512] The buggy address belongs to the physical page: [ 33.266638] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 33.266921] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.267143] page_type: f5(slab) [ 33.267324] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 33.267453] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 33.267559] page dumped because: kasan: bad access detected [ 33.267845] [ 33.267930] Memory state around the buggy address: [ 33.267979] fff00000c56f1200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.268062] fff00000c56f1280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.268213] >fff00000c56f1300: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 33.268491] ^ [ 33.268967] fff00000c56f1380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.269644] fff00000c56f1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.269961] ==================================================================
[ 22.138801] ================================================================== [ 22.139531] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 22.139784] Read of size 1 at addr ffff888101bb7f80 by task kunit_try_catch/221 [ 22.140266] [ 22.140400] CPU: 1 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250623 #1 PREEMPT(voluntary) [ 22.140481] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.140504] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.140534] Call Trace: [ 22.140558] <TASK> [ 22.140584] dump_stack_lvl+0x73/0xb0 [ 22.140635] print_report+0xd1/0x650 [ 22.140666] ? __virt_addr_valid+0x1db/0x2d0 [ 22.140698] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.140729] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.140769] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.140804] kasan_report+0x141/0x180 [ 22.140837] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.140874] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.140908] __kasan_check_byte+0x3d/0x50 [ 22.140944] kfree_sensitive+0x22/0x90 [ 22.140987] kmalloc_double_kzfree+0x19c/0x350 [ 22.141026] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 22.141064] ? __schedule+0x10cc/0x2b60 [ 22.141096] ? __pfx_read_tsc+0x10/0x10 [ 22.141129] ? ktime_get_ts64+0x86/0x230 [ 22.141168] kunit_try_run_case+0x1a5/0x480 [ 22.141203] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.141238] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.141272] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.141310] ? __kthread_parkme+0x82/0x180 [ 22.141341] ? preempt_count_sub+0x50/0x80 [ 22.141644] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.141721] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.141750] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.141772] kthread+0x337/0x6f0 [ 22.141789] ? trace_preempt_on+0x20/0xc0 [ 22.141809] ? __pfx_kthread+0x10/0x10 [ 22.141826] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.141852] ? calculate_sigpending+0x7b/0xa0 [ 22.141879] ? __pfx_kthread+0x10/0x10 [ 22.141902] ret_from_fork+0x116/0x1d0 [ 22.141924] ? __pfx_kthread+0x10/0x10 [ 22.141941] ret_from_fork_asm+0x1a/0x30 [ 22.141967] </TASK> [ 22.141978] [ 22.155445] Allocated by task 221: [ 22.155700] kasan_save_stack+0x45/0x70 [ 22.156422] kasan_save_track+0x18/0x40 [ 22.156699] kasan_save_alloc_info+0x3b/0x50 [ 22.156851] __kasan_kmalloc+0xb7/0xc0 [ 22.157126] __kmalloc_cache_noprof+0x189/0x420 [ 22.157336] kmalloc_double_kzfree+0xa9/0x350 [ 22.157557] kunit_try_run_case+0x1a5/0x480 [ 22.157703] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.158455] kthread+0x337/0x6f0 [ 22.158615] ret_from_fork+0x116/0x1d0 [ 22.159296] ret_from_fork_asm+0x1a/0x30 [ 22.159480] [ 22.159953] Freed by task 221: [ 22.160077] kasan_save_stack+0x45/0x70 [ 22.160220] kasan_save_track+0x18/0x40 [ 22.160740] kasan_save_free_info+0x3f/0x60 [ 22.161024] __kasan_slab_free+0x56/0x70 [ 22.161722] kfree+0x222/0x3f0 [ 22.161926] kfree_sensitive+0x67/0x90 [ 22.162069] kmalloc_double_kzfree+0x12b/0x350 [ 22.162801] kunit_try_run_case+0x1a5/0x480 [ 22.163001] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.163424] kthread+0x337/0x6f0 [ 22.163610] ret_from_fork+0x116/0x1d0 [ 22.163734] ret_from_fork_asm+0x1a/0x30 [ 22.164596] [ 22.164704] The buggy address belongs to the object at ffff888101bb7f80 [ 22.164704] which belongs to the cache kmalloc-16 of size 16 [ 22.165050] The buggy address is located 0 bytes inside of [ 22.165050] freed 16-byte region [ffff888101bb7f80, ffff888101bb7f90) [ 22.166341] [ 22.167028] The buggy address belongs to the physical page: [ 22.167452] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101bb7 [ 22.167951] flags: 0x200000000000000(node=0|zone=2) [ 22.168071] page_type: f5(slab) [ 22.168518] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 22.169028] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.169506] page dumped because: kasan: bad access detected [ 22.169682] [ 22.169868] Memory state around the buggy address: [ 22.170238] ffff888101bb7e80: fa fb fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 22.170610] ffff888101bb7f00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.171460] >ffff888101bb7f80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.171683] ^ [ 22.171855] ffff888101bb8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 22.172692] ffff888101bb8080: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 22.173268] ==================================================================