Date
July 8, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.565356] ================================================================== [ 19.565418] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.565471] Read of size 1 at addr fff00000c58c2b60 by task kunit_try_catch/192 [ 19.565520] [ 19.565551] CPU: 1 UID: 0 PID: 192 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.565634] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.565933] Hardware name: linux,dummy-virt (DT) [ 19.566077] Call trace: [ 19.566101] show_stack+0x20/0x38 (C) [ 19.566285] dump_stack_lvl+0x8c/0xd0 [ 19.566335] print_report+0x118/0x608 [ 19.566383] kasan_report+0xdc/0x128 [ 19.566790] __kasan_check_byte+0x54/0x70 [ 19.566850] kfree_sensitive+0x30/0xb0 [ 19.566904] kmalloc_double_kzfree+0x168/0x308 [ 19.566951] kunit_try_run_case+0x170/0x3f0 [ 19.567000] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.567053] kthread+0x328/0x630 [ 19.567094] ret_from_fork+0x10/0x20 [ 19.567140] [ 19.567169] Allocated by task 192: [ 19.567198] kasan_save_stack+0x3c/0x68 [ 19.567238] kasan_save_track+0x20/0x40 [ 19.567277] kasan_save_alloc_info+0x40/0x58 [ 19.567317] __kasan_kmalloc+0xd4/0xd8 [ 19.567354] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.567392] kmalloc_double_kzfree+0xb8/0x308 [ 19.567430] kunit_try_run_case+0x170/0x3f0 [ 19.567468] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.567771] kthread+0x328/0x630 [ 19.567823] ret_from_fork+0x10/0x20 [ 19.567893] [ 19.567914] Freed by task 192: [ 19.567940] kasan_save_stack+0x3c/0x68 [ 19.567980] kasan_save_track+0x20/0x40 [ 19.568018] kasan_save_free_info+0x4c/0x78 [ 19.568122] __kasan_slab_free+0x6c/0x98 [ 19.568372] kfree+0x214/0x3c8 [ 19.568406] kfree_sensitive+0x80/0xb0 [ 19.568637] kmalloc_double_kzfree+0x11c/0x308 [ 19.568724] kunit_try_run_case+0x170/0x3f0 [ 19.568776] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.568819] kthread+0x328/0x630 [ 19.568913] ret_from_fork+0x10/0x20 [ 19.568948] [ 19.568969] The buggy address belongs to the object at fff00000c58c2b60 [ 19.568969] which belongs to the cache kmalloc-16 of size 16 [ 19.569029] The buggy address is located 0 bytes inside of [ 19.569029] freed 16-byte region [fff00000c58c2b60, fff00000c58c2b70) [ 19.569088] [ 19.569117] The buggy address belongs to the physical page: [ 19.569148] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058c2 [ 19.569377] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.569429] page_type: f5(slab) [ 19.569469] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.569519] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.569559] page dumped because: kasan: bad access detected [ 19.569590] [ 19.569607] Memory state around the buggy address: [ 19.570182] fff00000c58c2a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.570477] fff00000c58c2a80: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.570626] >fff00000c58c2b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.570693] ^ [ 19.571106] fff00000c58c2b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.571254] fff00000c58c2c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.571440] ==================================================================
[ 12.848147] ================================================================== [ 12.848615] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.849127] Read of size 1 at addr ffff8881026260c0 by task kunit_try_catch/210 [ 12.850303] [ 12.850535] CPU: 1 UID: 0 PID: 210 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.850626] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.850638] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.850660] Call Trace: [ 12.850674] <TASK> [ 12.850694] dump_stack_lvl+0x73/0xb0 [ 12.850733] print_report+0xd1/0x650 [ 12.850758] ? __virt_addr_valid+0x1db/0x2d0 [ 12.850783] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.850806] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.850829] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.850852] kasan_report+0x141/0x180 [ 12.850873] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.850899] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.850922] __kasan_check_byte+0x3d/0x50 [ 12.851019] kfree_sensitive+0x22/0x90 [ 12.851042] kmalloc_double_kzfree+0x19c/0x350 [ 12.851065] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.851089] ? __schedule+0x10cc/0x2b60 [ 12.851112] ? __pfx_read_tsc+0x10/0x10 [ 12.851134] ? ktime_get_ts64+0x86/0x230 [ 12.851160] kunit_try_run_case+0x1a5/0x480 [ 12.851187] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.851209] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.851234] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.851257] ? __kthread_parkme+0x82/0x180 [ 12.851279] ? preempt_count_sub+0x50/0x80 [ 12.851304] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.851327] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.851351] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.851376] kthread+0x337/0x6f0 [ 12.851395] ? trace_preempt_on+0x20/0xc0 [ 12.851420] ? __pfx_kthread+0x10/0x10 [ 12.851439] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.851460] ? calculate_sigpending+0x7b/0xa0 [ 12.851485] ? __pfx_kthread+0x10/0x10 [ 12.851505] ret_from_fork+0x116/0x1d0 [ 12.851523] ? __pfx_kthread+0x10/0x10 [ 12.851542] ret_from_fork_asm+0x1a/0x30 [ 12.851575] </TASK> [ 12.851586] [ 12.863630] Allocated by task 210: [ 12.864104] kasan_save_stack+0x45/0x70 [ 12.864540] kasan_save_track+0x18/0x40 [ 12.864981] kasan_save_alloc_info+0x3b/0x50 [ 12.865375] __kasan_kmalloc+0xb7/0xc0 [ 12.865786] __kmalloc_cache_noprof+0x189/0x420 [ 12.866330] kmalloc_double_kzfree+0xa9/0x350 [ 12.866826] kunit_try_run_case+0x1a5/0x480 [ 12.867003] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.867543] kthread+0x337/0x6f0 [ 12.867789] ret_from_fork+0x116/0x1d0 [ 12.867965] ret_from_fork_asm+0x1a/0x30 [ 12.868340] [ 12.868497] Freed by task 210: [ 12.868805] kasan_save_stack+0x45/0x70 [ 12.869031] kasan_save_track+0x18/0x40 [ 12.869413] kasan_save_free_info+0x3f/0x60 [ 12.869837] __kasan_slab_free+0x56/0x70 [ 12.870242] kfree+0x222/0x3f0 [ 12.870648] kfree_sensitive+0x67/0x90 [ 12.870832] kmalloc_double_kzfree+0x12b/0x350 [ 12.871149] kunit_try_run_case+0x1a5/0x480 [ 12.871571] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.872198] kthread+0x337/0x6f0 [ 12.872531] ret_from_fork+0x116/0x1d0 [ 12.872773] ret_from_fork_asm+0x1a/0x30 [ 12.872914] [ 12.873126] The buggy address belongs to the object at ffff8881026260c0 [ 12.873126] which belongs to the cache kmalloc-16 of size 16 [ 12.874238] The buggy address is located 0 bytes inside of [ 12.874238] freed 16-byte region [ffff8881026260c0, ffff8881026260d0) [ 12.874761] [ 12.874928] The buggy address belongs to the physical page: [ 12.875472] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102626 [ 12.876307] flags: 0x200000000000000(node=0|zone=2) [ 12.876858] page_type: f5(slab) [ 12.877050] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.877741] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.878059] page dumped because: kasan: bad access detected [ 12.878549] [ 12.878771] Memory state around the buggy address: [ 12.879283] ffff888102625f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.879521] ffff888102626000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.879747] >ffff888102626080: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 12.879981] ^ [ 12.880246] ffff888102626100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.880619] ffff888102626180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.880871] ==================================================================