Date
July 2, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.332435] ================================================================== [ 18.332511] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 18.332570] Read of size 1 at addr fff00000c3f3ec80 by task kunit_try_catch/192 [ 18.332633] [ 18.332672] CPU: 0 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.333206] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.333299] Hardware name: linux,dummy-virt (DT) [ 18.333408] Call trace: [ 18.333435] show_stack+0x20/0x38 (C) [ 18.333739] dump_stack_lvl+0x8c/0xd0 [ 18.333877] print_report+0x118/0x608 [ 18.333956] kasan_report+0xdc/0x128 [ 18.334042] __kasan_check_byte+0x54/0x70 [ 18.334308] kfree_sensitive+0x30/0xb0 [ 18.334443] kmalloc_double_kzfree+0x168/0x308 [ 18.334495] kunit_try_run_case+0x170/0x3f0 [ 18.334815] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.334907] kthread+0x328/0x630 [ 18.334988] ret_from_fork+0x10/0x20 [ 18.335212] [ 18.335356] Allocated by task 192: [ 18.335624] kasan_save_stack+0x3c/0x68 [ 18.335722] kasan_save_track+0x20/0x40 [ 18.335883] kasan_save_alloc_info+0x40/0x58 [ 18.335980] __kasan_kmalloc+0xd4/0xd8 [ 18.336235] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.336300] kmalloc_double_kzfree+0xb8/0x308 [ 18.336739] kunit_try_run_case+0x170/0x3f0 [ 18.337288] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.337612] kthread+0x328/0x630 [ 18.337700] ret_from_fork+0x10/0x20 [ 18.337788] [ 18.337844] Freed by task 192: [ 18.337887] kasan_save_stack+0x3c/0x68 [ 18.338285] kasan_save_track+0x20/0x40 [ 18.338603] kasan_save_free_info+0x4c/0x78 [ 18.338796] __kasan_slab_free+0x6c/0x98 [ 18.338891] kfree+0x214/0x3c8 [ 18.338936] kfree_sensitive+0x80/0xb0 [ 18.339087] kmalloc_double_kzfree+0x11c/0x308 [ 18.339553] kunit_try_run_case+0x170/0x3f0 [ 18.339685] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.340092] kthread+0x328/0x630 [ 18.340153] ret_from_fork+0x10/0x20 [ 18.340199] [ 18.340560] The buggy address belongs to the object at fff00000c3f3ec80 [ 18.340560] which belongs to the cache kmalloc-16 of size 16 [ 18.340648] The buggy address is located 0 bytes inside of [ 18.340648] freed 16-byte region [fff00000c3f3ec80, fff00000c3f3ec90) [ 18.341072] [ 18.341141] The buggy address belongs to the physical page: [ 18.341224] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f3e [ 18.341323] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.341453] page_type: f5(slab) [ 18.341533] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.341717] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.341889] page dumped because: kasan: bad access detected [ 18.341949] [ 18.341986] Memory state around the buggy address: [ 18.342051] fff00000c3f3eb80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.342166] fff00000c3f3ec00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.342223] >fff00000c3f3ec80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.342274] ^ [ 18.342596] fff00000c3f3ed00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.342663] fff00000c3f3ed80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.342729] ==================================================================
[ 11.728971] ================================================================== [ 11.729827] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 11.730369] Read of size 1 at addr ffff8881027960c0 by task kunit_try_catch/211 [ 11.731090] [ 11.731270] CPU: 1 UID: 0 PID: 211 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.731315] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.731326] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.731346] Call Trace: [ 11.731358] <TASK> [ 11.731389] dump_stack_lvl+0x73/0xb0 [ 11.731419] print_report+0xd1/0x650 [ 11.731441] ? __virt_addr_valid+0x1db/0x2d0 [ 11.731463] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.731485] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.731506] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.731527] kasan_report+0x141/0x180 [ 11.731548] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.731572] ? kmalloc_double_kzfree+0x19c/0x350 [ 11.731594] __kasan_check_byte+0x3d/0x50 [ 11.731615] kfree_sensitive+0x22/0x90 [ 11.731637] kmalloc_double_kzfree+0x19c/0x350 [ 11.731658] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 11.731681] ? __schedule+0x10cc/0x2b60 [ 11.731706] ? __pfx_read_tsc+0x10/0x10 [ 11.731726] ? ktime_get_ts64+0x86/0x230 [ 11.731750] kunit_try_run_case+0x1a5/0x480 [ 11.731774] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.731795] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.731817] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.731838] ? __kthread_parkme+0x82/0x180 [ 11.731857] ? preempt_count_sub+0x50/0x80 [ 11.731880] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.731902] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.731923] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.731945] kthread+0x337/0x6f0 [ 11.731963] ? trace_preempt_on+0x20/0xc0 [ 11.731986] ? __pfx_kthread+0x10/0x10 [ 11.732005] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.732025] ? calculate_sigpending+0x7b/0xa0 [ 11.732047] ? __pfx_kthread+0x10/0x10 [ 11.732068] ret_from_fork+0x116/0x1d0 [ 11.732085] ? __pfx_kthread+0x10/0x10 [ 11.732104] ret_from_fork_asm+0x1a/0x30 [ 11.732134] </TASK> [ 11.732145] [ 11.745209] Allocated by task 211: [ 11.745550] kasan_save_stack+0x45/0x70 [ 11.745974] kasan_save_track+0x18/0x40 [ 11.746413] kasan_save_alloc_info+0x3b/0x50 [ 11.746572] __kasan_kmalloc+0xb7/0xc0 [ 11.746704] __kmalloc_cache_noprof+0x189/0x420 [ 11.747116] kmalloc_double_kzfree+0xa9/0x350 [ 11.747528] kunit_try_run_case+0x1a5/0x480 [ 11.747978] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.748498] kthread+0x337/0x6f0 [ 11.748812] ret_from_fork+0x116/0x1d0 [ 11.749207] ret_from_fork_asm+0x1a/0x30 [ 11.749453] [ 11.749525] Freed by task 211: [ 11.749851] kasan_save_stack+0x45/0x70 [ 11.750216] kasan_save_track+0x18/0x40 [ 11.750576] kasan_save_free_info+0x3f/0x60 [ 11.751041] __kasan_slab_free+0x56/0x70 [ 11.751436] kfree+0x222/0x3f0 [ 11.751807] kfree_sensitive+0x67/0x90 [ 11.752078] kmalloc_double_kzfree+0x12b/0x350 [ 11.752240] kunit_try_run_case+0x1a5/0x480 [ 11.752396] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.752568] kthread+0x337/0x6f0 [ 11.753065] ret_from_fork+0x116/0x1d0 [ 11.753445] ret_from_fork_asm+0x1a/0x30 [ 11.753870] [ 11.754193] The buggy address belongs to the object at ffff8881027960c0 [ 11.754193] which belongs to the cache kmalloc-16 of size 16 [ 11.755329] The buggy address is located 0 bytes inside of [ 11.755329] freed 16-byte region [ffff8881027960c0, ffff8881027960d0) [ 11.756237] [ 11.756315] The buggy address belongs to the physical page: [ 11.756501] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102796 [ 11.757128] flags: 0x200000000000000(node=0|zone=2) [ 11.757744] page_type: f5(slab) [ 11.758088] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.758918] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.759631] page dumped because: kasan: bad access detected [ 11.759994] [ 11.760077] Memory state around the buggy address: [ 11.760506] ffff888102795f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.761313] ffff888102796000: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.761751] >ffff888102796080: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 11.762502] ^ [ 11.762874] ffff888102796100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.763091] ffff888102796180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.763302] ==================================================================