Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.051847] ================================================================== [ 19.052754] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.053536] Read of size 1 at addr fff00000c59b8560 by task kunit_try_catch/181 [ 19.054136] [ 19.054474] CPU: 1 UID: 0 PID: 181 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 19.054699] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.054779] Hardware name: linux,dummy-virt (DT) [ 19.055582] Call trace: [ 19.055623] show_stack+0x20/0x38 (C) [ 19.055698] dump_stack_lvl+0x8c/0xd0 [ 19.055784] print_report+0x118/0x608 [ 19.055837] kasan_report+0xdc/0x128 [ 19.055884] __kasan_check_byte+0x54/0x70 [ 19.055933] kfree_sensitive+0x30/0xb0 [ 19.055983] kmalloc_double_kzfree+0x168/0x308 [ 19.056033] kunit_try_run_case+0x170/0x3f0 [ 19.056082] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.056134] kthread+0x318/0x620 [ 19.056180] ret_from_fork+0x10/0x20 [ 19.056230] [ 19.060230] Allocated by task 181: [ 19.060445] kasan_save_stack+0x3c/0x68 [ 19.060677] kasan_save_track+0x20/0x40 [ 19.061853] kasan_save_alloc_info+0x40/0x58 [ 19.062405] __kasan_kmalloc+0xd4/0xd8 [ 19.062806] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.063060] kmalloc_double_kzfree+0xb8/0x308 [ 19.063303] kunit_try_run_case+0x170/0x3f0 [ 19.063535] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.064597] kthread+0x318/0x620 [ 19.065248] ret_from_fork+0x10/0x20 [ 19.066004] [ 19.066564] Freed by task 181: [ 19.067305] kasan_save_stack+0x3c/0x68 [ 19.067715] kasan_save_track+0x20/0x40 [ 19.067964] kasan_save_free_info+0x4c/0x78 [ 19.068185] __kasan_slab_free+0x6c/0x98 [ 19.068395] kfree+0x214/0x3c8 [ 19.068585] kfree_sensitive+0x80/0xb0 [ 19.068797] kmalloc_double_kzfree+0x11c/0x308 [ 19.069018] kunit_try_run_case+0x170/0x3f0 [ 19.069233] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.069493] kthread+0x318/0x620 [ 19.069690] ret_from_fork+0x10/0x20 [ 19.070468] [ 19.071059] The buggy address belongs to the object at fff00000c59b8560 [ 19.071059] which belongs to the cache kmalloc-16 of size 16 [ 19.073051] The buggy address is located 0 bytes inside of [ 19.073051] freed 16-byte region [fff00000c59b8560, fff00000c59b8570) [ 19.074401] [ 19.074815] The buggy address belongs to the physical page: [ 19.075126] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059b8 [ 19.075684] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.076146] page_type: f5(slab) [ 19.077009] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.077716] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.078488] page dumped because: kasan: bad access detected [ 19.079179] [ 19.079427] Memory state around the buggy address: [ 19.079768] fff00000c59b8400: fa fb fc fc 00 03 fc fc 00 03 fc fc 00 00 fc fc [ 19.080782] fff00000c59b8480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.081427] >fff00000c59b8500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.082339] ^ [ 19.083029] fff00000c59b8580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.083910] fff00000c59b8600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.084611] ==================================================================
[ 12.785533] ================================================================== [ 12.786454] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19d/0x360 [ 12.786799] Read of size 1 at addr ffff888101b28040 by task kunit_try_catch/200 [ 12.787154] [ 12.787292] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 12.787343] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.787355] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.787377] Call Trace: [ 12.787392] <TASK> [ 12.787412] dump_stack_lvl+0x73/0xb0 [ 12.787440] print_report+0xd1/0x650 [ 12.787601] ? __virt_addr_valid+0x1db/0x2d0 [ 12.787627] ? kmalloc_double_kzfree+0x19d/0x360 [ 12.787649] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.787698] ? kmalloc_double_kzfree+0x19d/0x360 [ 12.787720] kasan_report+0x140/0x180 [ 12.787741] ? kmalloc_double_kzfree+0x19d/0x360 [ 12.787766] ? kmalloc_double_kzfree+0x19d/0x360 [ 12.787787] __kasan_check_byte+0x3d/0x50 [ 12.787808] kfree_sensitive+0x22/0x90 [ 12.787830] kmalloc_double_kzfree+0x19d/0x360 [ 12.787862] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.787885] ? __schedule+0xce8/0x2840 [ 12.787928] ? __pfx_read_tsc+0x10/0x10 [ 12.787951] ? ktime_get_ts64+0x86/0x230 [ 12.787977] kunit_try_run_case+0x1a6/0x480 [ 12.788098] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.788120] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.788142] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.788166] ? __kthread_parkme+0x82/0x160 [ 12.788190] ? preempt_count_sub+0x50/0x80 [ 12.788214] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.788236] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.788262] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.788287] kthread+0x324/0x6e0 [ 12.788308] ? trace_preempt_on+0x20/0xc0 [ 12.788332] ? __pfx_kthread+0x10/0x10 [ 12.788354] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.788377] ? calculate_sigpending+0x7b/0xa0 [ 12.788400] ? __pfx_kthread+0x10/0x10 [ 12.788423] ret_from_fork+0x41/0x80 [ 12.788442] ? __pfx_kthread+0x10/0x10 [ 12.788463] ret_from_fork_asm+0x1a/0x30 [ 12.788496] </TASK> [ 12.788510] [ 12.796312] Allocated by task 200: [ 12.796526] kasan_save_stack+0x45/0x70 [ 12.796750] kasan_save_track+0x18/0x40 [ 12.796975] kasan_save_alloc_info+0x3b/0x50 [ 12.797313] __kasan_kmalloc+0xb7/0xc0 [ 12.797506] __kmalloc_cache_noprof+0x18a/0x420 [ 12.797665] kmalloc_double_kzfree+0xaa/0x360 [ 12.797918] kunit_try_run_case+0x1a6/0x480 [ 12.798218] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.798473] kthread+0x324/0x6e0 [ 12.798598] ret_from_fork+0x41/0x80 [ 12.798726] ret_from_fork_asm+0x1a/0x30 [ 12.798913] [ 12.799161] Freed by task 200: [ 12.799327] kasan_save_stack+0x45/0x70 [ 12.799525] kasan_save_track+0x18/0x40 [ 12.799740] kasan_save_free_info+0x3f/0x60 [ 12.799957] __kasan_slab_free+0x56/0x70 [ 12.800237] kfree+0x224/0x3f0 [ 12.800427] kfree_sensitive+0x67/0x90 [ 12.800624] kmalloc_double_kzfree+0x12c/0x360 [ 12.800776] kunit_try_run_case+0x1a6/0x480 [ 12.800964] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.801333] kthread+0x324/0x6e0 [ 12.801525] ret_from_fork+0x41/0x80 [ 12.801708] ret_from_fork_asm+0x1a/0x30 [ 12.801922] [ 12.802112] The buggy address belongs to the object at ffff888101b28040 [ 12.802112] which belongs to the cache kmalloc-16 of size 16 [ 12.802588] The buggy address is located 0 bytes inside of [ 12.802588] freed 16-byte region [ffff888101b28040, ffff888101b28050) [ 12.802965] [ 12.803271] The buggy address belongs to the physical page: [ 12.803551] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b28 [ 12.803941] flags: 0x200000000000000(node=0|zone=2) [ 12.804269] page_type: f5(slab) [ 12.804411] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.804758] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.805213] page dumped because: kasan: bad access detected [ 12.805395] [ 12.805465] Memory state around the buggy address: [ 12.805709] ffff888101b27f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.806130] ffff888101b27f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.806436] >ffff888101b28000: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 12.806649] ^ [ 12.806911] ffff888101b28080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.807242] ffff888101b28100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.807535] ==================================================================