Date
July 16, 2025, 12:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.175738] ================================================================== [ 31.176052] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 31.176203] Free of addr fff00000c9a5a000 by task kunit_try_catch/240 [ 31.176282] [ 31.176400] CPU: 0 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT [ 31.176521] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.176705] Hardware name: linux,dummy-virt (DT) [ 31.176751] Call trace: [ 31.176775] show_stack+0x20/0x38 (C) [ 31.176848] dump_stack_lvl+0x8c/0xd0 [ 31.176902] print_report+0x118/0x5d0 [ 31.176946] kasan_report_invalid_free+0xc0/0xe8 [ 31.176995] check_slab_allocation+0xd4/0x108 [ 31.177102] __kasan_slab_pre_free+0x2c/0x48 [ 31.177321] kmem_cache_free+0xf0/0x468 [ 31.177433] kmem_cache_double_free+0x190/0x3c8 [ 31.177577] kunit_try_run_case+0x170/0x3f0 [ 31.177698] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.177844] kthread+0x328/0x630 [ 31.177921] ret_from_fork+0x10/0x20 [ 31.177990] [ 31.178014] Allocated by task 240: [ 31.178043] kasan_save_stack+0x3c/0x68 [ 31.178083] kasan_save_track+0x20/0x40 [ 31.178129] kasan_save_alloc_info+0x40/0x58 [ 31.178178] __kasan_slab_alloc+0xa8/0xb0 [ 31.178227] kmem_cache_alloc_noprof+0x10c/0x398 [ 31.178271] kmem_cache_double_free+0x12c/0x3c8 [ 31.178312] kunit_try_run_case+0x170/0x3f0 [ 31.178363] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.178424] kthread+0x328/0x630 [ 31.178463] ret_from_fork+0x10/0x20 [ 31.178500] [ 31.178538] Freed by task 240: [ 31.178565] kasan_save_stack+0x3c/0x68 [ 31.178610] kasan_save_track+0x20/0x40 [ 31.178644] kasan_save_free_info+0x4c/0x78 [ 31.178691] __kasan_slab_free+0x6c/0x98 [ 31.178735] kmem_cache_free+0x260/0x468 [ 31.178783] kmem_cache_double_free+0x140/0x3c8 [ 31.178831] kunit_try_run_case+0x170/0x3f0 [ 31.178868] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.178920] kthread+0x328/0x630 [ 31.178953] ret_from_fork+0x10/0x20 [ 31.178997] [ 31.179016] The buggy address belongs to the object at fff00000c9a5a000 [ 31.179016] which belongs to the cache test_cache of size 200 [ 31.179075] The buggy address is located 0 bytes inside of [ 31.179075] 200-byte region [fff00000c9a5a000, fff00000c9a5a0c8) [ 31.179135] [ 31.179157] The buggy address belongs to the physical page: [ 31.179190] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a5a [ 31.179248] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.179303] page_type: f5(slab) [ 31.179356] raw: 0bfffe0000000000 fff00000c56a18c0 dead000000000122 0000000000000000 [ 31.179408] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.179459] page dumped because: kasan: bad access detected [ 31.179491] [ 31.179519] Memory state around the buggy address: [ 31.179554] fff00000c9a59f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.179599] fff00000c9a59f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.179845] >fff00000c9a5a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.180172] ^ [ 31.180207] fff00000c9a5a080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.180254] fff00000c9a5a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.180556] ==================================================================
[ 23.990690] ================================================================== [ 23.991173] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 23.991526] Free of addr ffff8881053b2000 by task kunit_try_catch/258 [ 23.992083] [ 23.992191] CPU: 0 UID: 0 PID: 258 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT(voluntary) [ 23.992244] Tainted: [B]=BAD_PAGE, [N]=TEST [ 23.992256] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 23.992289] Call Trace: [ 23.992303] <TASK> [ 23.992323] dump_stack_lvl+0x73/0xb0 [ 23.992384] print_report+0xd1/0x610 [ 23.992408] ? __virt_addr_valid+0x1db/0x2d0 [ 23.992435] ? kasan_complete_mode_report_info+0x64/0x200 [ 23.992480] ? kmem_cache_double_free+0x1e5/0x480 [ 23.992505] kasan_report_invalid_free+0x10a/0x130 [ 23.992528] ? kmem_cache_double_free+0x1e5/0x480 [ 23.992553] ? kmem_cache_double_free+0x1e5/0x480 [ 23.992592] check_slab_allocation+0x101/0x130 [ 23.992613] __kasan_slab_pre_free+0x28/0x40 [ 23.992647] kmem_cache_free+0xed/0x420 [ 23.992681] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 23.992705] ? kmem_cache_double_free+0x1e5/0x480 [ 23.992731] kmem_cache_double_free+0x1e5/0x480 [ 23.992755] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 23.992778] ? finish_task_switch.isra.0+0x153/0x700 [ 23.992800] ? __switch_to+0x47/0xf80 [ 23.992830] ? __pfx_read_tsc+0x10/0x10 [ 23.992852] ? ktime_get_ts64+0x86/0x230 [ 23.992878] kunit_try_run_case+0x1a5/0x480 [ 23.992903] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.992995] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 23.993019] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 23.993042] ? __kthread_parkme+0x82/0x180 [ 23.993063] ? preempt_count_sub+0x50/0x80 [ 23.993084] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.993107] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.993133] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 23.993159] kthread+0x337/0x6f0 [ 23.993178] ? trace_preempt_on+0x20/0xc0 [ 23.993202] ? __pfx_kthread+0x10/0x10 [ 23.993221] ? _raw_spin_unlock_irq+0x47/0x80 [ 23.993241] ? calculate_sigpending+0x7b/0xa0 [ 23.993265] ? __pfx_kthread+0x10/0x10 [ 23.993297] ret_from_fork+0x116/0x1d0 [ 23.993316] ? __pfx_kthread+0x10/0x10 [ 23.993336] ret_from_fork_asm+0x1a/0x30 [ 23.993367] </TASK> [ 23.993378] [ 24.005637] Allocated by task 258: [ 24.005910] kasan_save_stack+0x45/0x70 [ 24.006171] kasan_save_track+0x18/0x40 [ 24.006361] kasan_save_alloc_info+0x3b/0x50 [ 24.006562] __kasan_slab_alloc+0x91/0xa0 [ 24.006779] kmem_cache_alloc_noprof+0x123/0x3f0 [ 24.007116] kmem_cache_double_free+0x14f/0x480 [ 24.007321] kunit_try_run_case+0x1a5/0x480 [ 24.007530] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.008080] kthread+0x337/0x6f0 [ 24.008241] ret_from_fork+0x116/0x1d0 [ 24.008673] ret_from_fork_asm+0x1a/0x30 [ 24.008979] [ 24.009054] Freed by task 258: [ 24.009184] kasan_save_stack+0x45/0x70 [ 24.009394] kasan_save_track+0x18/0x40 [ 24.009554] kasan_save_free_info+0x3f/0x60 [ 24.009736] __kasan_slab_free+0x56/0x70 [ 24.010407] kmem_cache_free+0x249/0x420 [ 24.010558] kmem_cache_double_free+0x16a/0x480 [ 24.010788] kunit_try_run_case+0x1a5/0x480 [ 24.011056] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.011302] kthread+0x337/0x6f0 [ 24.011451] ret_from_fork+0x116/0x1d0 [ 24.011606] ret_from_fork_asm+0x1a/0x30 [ 24.012163] [ 24.012237] The buggy address belongs to the object at ffff8881053b2000 [ 24.012237] which belongs to the cache test_cache of size 200 [ 24.012893] The buggy address is located 0 bytes inside of [ 24.012893] 200-byte region [ffff8881053b2000, ffff8881053b20c8) [ 24.013428] [ 24.013530] The buggy address belongs to the physical page: [ 24.014295] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1053b2 [ 24.014745] flags: 0x200000000000000(node=0|zone=2) [ 24.015000] page_type: f5(slab) [ 24.015353] raw: 0200000000000000 ffff888101a65a00 dead000000000122 0000000000000000 [ 24.015775] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 24.016123] page dumped because: kasan: bad access detected [ 24.016448] [ 24.016541] Memory state around the buggy address: [ 24.017056] ffff8881053b1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.017360] ffff8881053b1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.017781] >ffff8881053b2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.019567] ^ [ 24.019800] ffff8881053b2080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.020076] ffff8881053b2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.020380] ==================================================================