Date
July 5, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.331912] ================================================================== [ 19.332024] BUG: KASAN: slab-use-after-free in ksize_uaf+0x598/0x5f8 [ 19.332132] Read of size 1 at addr fff00000c56f1e00 by task kunit_try_catch/197 [ 19.332243] [ 19.332310] CPU: 0 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.332511] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.332572] Hardware name: linux,dummy-virt (DT) [ 19.332640] Call trace: [ 19.332687] show_stack+0x20/0x38 (C) [ 19.332788] dump_stack_lvl+0x8c/0xd0 [ 19.332887] print_report+0x118/0x608 [ 19.332995] kasan_report+0xdc/0x128 [ 19.333095] __asan_report_load1_noabort+0x20/0x30 [ 19.333206] ksize_uaf+0x598/0x5f8 [ 19.333302] kunit_try_run_case+0x170/0x3f0 [ 19.334257] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.334403] kthread+0x328/0x630 [ 19.334554] ret_from_fork+0x10/0x20 [ 19.334683] [ 19.334734] Allocated by task 197: [ 19.334799] kasan_save_stack+0x3c/0x68 [ 19.334895] kasan_save_track+0x20/0x40 [ 19.334982] kasan_save_alloc_info+0x40/0x58 [ 19.335066] __kasan_kmalloc+0xd4/0xd8 [ 19.335133] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.335199] ksize_uaf+0xb8/0x5f8 [ 19.335269] kunit_try_run_case+0x170/0x3f0 [ 19.335344] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.335456] kthread+0x328/0x630 [ 19.335539] ret_from_fork+0x10/0x20 [ 19.335615] [ 19.335661] Freed by task 197: [ 19.335722] kasan_save_stack+0x3c/0x68 [ 19.335805] kasan_save_track+0x20/0x40 [ 19.335888] kasan_save_free_info+0x4c/0x78 [ 19.335975] __kasan_slab_free+0x6c/0x98 [ 19.336060] kfree+0x214/0x3c8 [ 19.336136] ksize_uaf+0x11c/0x5f8 [ 19.336230] kunit_try_run_case+0x170/0x3f0 [ 19.336314] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.336455] kthread+0x328/0x630 [ 19.336524] ret_from_fork+0x10/0x20 [ 19.336605] [ 19.336654] The buggy address belongs to the object at fff00000c56f1e00 [ 19.336654] which belongs to the cache kmalloc-128 of size 128 [ 19.336815] The buggy address is located 0 bytes inside of [ 19.336815] freed 128-byte region [fff00000c56f1e00, fff00000c56f1e80) [ 19.336957] [ 19.337006] The buggy address belongs to the physical page: [ 19.337083] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 19.337191] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.337334] page_type: f5(slab) [ 19.337470] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 19.337633] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 19.337759] page dumped because: kasan: bad access detected [ 19.337857] [ 19.337915] Memory state around the buggy address: [ 19.338012] fff00000c56f1d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.338152] fff00000c56f1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.338239] >fff00000c56f1e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.338318] ^ [ 19.338400] fff00000c56f1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.338549] fff00000c56f1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.338643] ================================================================== [ 19.319599] ================================================================== [ 19.319728] BUG: KASAN: slab-use-after-free in ksize_uaf+0x168/0x5f8 [ 19.319885] Read of size 1 at addr fff00000c56f1e00 by task kunit_try_catch/197 [ 19.320012] [ 19.320081] CPU: 0 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.320256] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.320321] Hardware name: linux,dummy-virt (DT) [ 19.320406] Call trace: [ 19.321346] show_stack+0x20/0x38 (C) [ 19.321639] dump_stack_lvl+0x8c/0xd0 [ 19.322170] print_report+0x118/0x608 [ 19.322271] kasan_report+0xdc/0x128 [ 19.322633] __kasan_check_byte+0x54/0x70 [ 19.322769] ksize+0x30/0x88 [ 19.322861] ksize_uaf+0x168/0x5f8 [ 19.322954] kunit_try_run_case+0x170/0x3f0 [ 19.323227] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.323373] kthread+0x328/0x630 [ 19.323481] ret_from_fork+0x10/0x20 [ 19.323596] [ 19.323642] Allocated by task 197: [ 19.323708] kasan_save_stack+0x3c/0x68 [ 19.323818] kasan_save_track+0x20/0x40 [ 19.323915] kasan_save_alloc_info+0x40/0x58 [ 19.324305] __kasan_kmalloc+0xd4/0xd8 [ 19.324605] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.324720] ksize_uaf+0xb8/0x5f8 [ 19.324810] kunit_try_run_case+0x170/0x3f0 [ 19.324911] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.325164] kthread+0x328/0x630 [ 19.325286] ret_from_fork+0x10/0x20 [ 19.325720] [ 19.325776] Freed by task 197: [ 19.325842] kasan_save_stack+0x3c/0x68 [ 19.326126] kasan_save_track+0x20/0x40 [ 19.326210] kasan_save_free_info+0x4c/0x78 [ 19.326445] __kasan_slab_free+0x6c/0x98 [ 19.326660] kfree+0x214/0x3c8 [ 19.326778] ksize_uaf+0x11c/0x5f8 [ 19.326964] kunit_try_run_case+0x170/0x3f0 [ 19.327280] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.327449] kthread+0x328/0x630 [ 19.327545] ret_from_fork+0x10/0x20 [ 19.327617] [ 19.327663] The buggy address belongs to the object at fff00000c56f1e00 [ 19.327663] which belongs to the cache kmalloc-128 of size 128 [ 19.327873] The buggy address is located 0 bytes inside of [ 19.327873] freed 128-byte region [fff00000c56f1e00, fff00000c56f1e80) [ 19.328127] [ 19.328197] The buggy address belongs to the physical page: [ 19.328265] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 19.328704] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.328821] page_type: f5(slab) [ 19.329025] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 19.329139] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 19.329411] page dumped because: kasan: bad access detected [ 19.329485] [ 19.329609] Memory state around the buggy address: [ 19.329791] fff00000c56f1d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.329890] fff00000c56f1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.329986] >fff00000c56f1e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.330064] ^ [ 19.330126] fff00000c56f1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.330220] fff00000c56f1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.330603] ================================================================== [ 19.340454] ================================================================== [ 19.340585] BUG: KASAN: slab-use-after-free in ksize_uaf+0x544/0x5f8 [ 19.340687] Read of size 1 at addr fff00000c56f1e78 by task kunit_try_catch/197 [ 19.340789] [ 19.340875] CPU: 0 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.341095] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.341177] Hardware name: linux,dummy-virt (DT) [ 19.341253] Call trace: [ 19.341303] show_stack+0x20/0x38 (C) [ 19.341416] dump_stack_lvl+0x8c/0xd0 [ 19.341521] print_report+0x118/0x608 [ 19.341624] kasan_report+0xdc/0x128 [ 19.341724] __asan_report_load1_noabort+0x20/0x30 [ 19.341829] ksize_uaf+0x544/0x5f8 [ 19.341928] kunit_try_run_case+0x170/0x3f0 [ 19.342034] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.342143] kthread+0x328/0x630 [ 19.342283] ret_from_fork+0x10/0x20 [ 19.342399] [ 19.342448] Allocated by task 197: [ 19.342524] kasan_save_stack+0x3c/0x68 [ 19.342660] kasan_save_track+0x20/0x40 [ 19.342751] kasan_save_alloc_info+0x40/0x58 [ 19.342854] __kasan_kmalloc+0xd4/0xd8 [ 19.342925] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.343004] ksize_uaf+0xb8/0x5f8 [ 19.343110] kunit_try_run_case+0x170/0x3f0 [ 19.343206] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.343295] kthread+0x328/0x630 [ 19.343372] ret_from_fork+0x10/0x20 [ 19.343465] [ 19.343514] Freed by task 197: [ 19.343610] kasan_save_stack+0x3c/0x68 [ 19.343715] kasan_save_track+0x20/0x40 [ 19.343867] kasan_save_free_info+0x4c/0x78 [ 19.343913] __kasan_slab_free+0x6c/0x98 [ 19.343953] kfree+0x214/0x3c8 [ 19.344009] ksize_uaf+0x11c/0x5f8 [ 19.344097] kunit_try_run_case+0x170/0x3f0 [ 19.344181] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.344278] kthread+0x328/0x630 [ 19.344349] ret_from_fork+0x10/0x20 [ 19.344460] [ 19.344522] The buggy address belongs to the object at fff00000c56f1e00 [ 19.344522] which belongs to the cache kmalloc-128 of size 128 [ 19.344676] The buggy address is located 120 bytes inside of [ 19.344676] freed 128-byte region [fff00000c56f1e00, fff00000c56f1e80) [ 19.344798] [ 19.344862] The buggy address belongs to the physical page: [ 19.344963] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056f1 [ 19.345119] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.345254] page_type: f5(slab) [ 19.345369] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 19.345484] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 19.345575] page dumped because: kasan: bad access detected [ 19.345657] [ 19.345699] Memory state around the buggy address: [ 19.345762] fff00000c56f1d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.345870] fff00000c56f1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.345998] >fff00000c56f1e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.346072] ^ [ 19.346159] fff00000c56f1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.346292] fff00000c56f1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.346392] ==================================================================
[ 14.155744] ================================================================== [ 14.156614] BUG: KASAN: slab-use-after-free in ksize_uaf+0x19d/0x6c0 [ 14.157175] Read of size 1 at addr ffff888103332300 by task kunit_try_catch/213 [ 14.157559] [ 14.157732] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 14.157789] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.157804] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.157832] Call Trace: [ 14.157848] <TASK> [ 14.157887] dump_stack_lvl+0x73/0xb0 [ 14.157923] print_report+0xd1/0x650 [ 14.157950] ? __virt_addr_valid+0x1db/0x2d0 [ 14.157977] ? ksize_uaf+0x19d/0x6c0 [ 14.158001] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.158027] ? ksize_uaf+0x19d/0x6c0 [ 14.158080] kasan_report+0x141/0x180 [ 14.158123] ? ksize_uaf+0x19d/0x6c0 [ 14.158151] ? ksize_uaf+0x19d/0x6c0 [ 14.158174] __kasan_check_byte+0x3d/0x50 [ 14.158200] ksize+0x20/0x60 [ 14.158224] ksize_uaf+0x19d/0x6c0 [ 14.158247] ? __pfx_ksize_uaf+0x10/0x10 [ 14.158272] ? __schedule+0x10cc/0x2b60 [ 14.158298] ? __pfx_read_tsc+0x10/0x10 [ 14.158323] ? ktime_get_ts64+0x86/0x230 [ 14.158351] kunit_try_run_case+0x1a5/0x480 [ 14.158381] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.158406] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.158441] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.158468] ? __kthread_parkme+0x82/0x180 [ 14.158491] ? preempt_count_sub+0x50/0x80 [ 14.158519] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.158545] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.158571] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.158597] kthread+0x337/0x6f0 [ 14.158619] ? trace_preempt_on+0x20/0xc0 [ 14.158659] ? __pfx_kthread+0x10/0x10 [ 14.158683] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.158706] ? calculate_sigpending+0x7b/0xa0 [ 14.158734] ? __pfx_kthread+0x10/0x10 [ 14.158759] ret_from_fork+0x116/0x1d0 [ 14.158791] ? __pfx_kthread+0x10/0x10 [ 14.158814] ret_from_fork_asm+0x1a/0x30 [ 14.158851] </TASK> [ 14.158864] [ 14.170286] Allocated by task 213: [ 14.170661] kasan_save_stack+0x45/0x70 [ 14.170911] kasan_save_track+0x18/0x40 [ 14.171110] kasan_save_alloc_info+0x3b/0x50 [ 14.171348] __kasan_kmalloc+0xb7/0xc0 [ 14.171538] __kmalloc_cache_noprof+0x189/0x420 [ 14.171790] ksize_uaf+0xaa/0x6c0 [ 14.172326] kunit_try_run_case+0x1a5/0x480 [ 14.172541] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.172847] kthread+0x337/0x6f0 [ 14.173325] ret_from_fork+0x116/0x1d0 [ 14.173621] ret_from_fork_asm+0x1a/0x30 [ 14.174015] [ 14.174120] Freed by task 213: [ 14.174456] kasan_save_stack+0x45/0x70 [ 14.174689] kasan_save_track+0x18/0x40 [ 14.175085] kasan_save_free_info+0x3f/0x60 [ 14.175293] __kasan_slab_free+0x56/0x70 [ 14.175497] kfree+0x222/0x3f0 [ 14.175680] ksize_uaf+0x12c/0x6c0 [ 14.176163] kunit_try_run_case+0x1a5/0x480 [ 14.176486] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.176903] kthread+0x337/0x6f0 [ 14.177289] ret_from_fork+0x116/0x1d0 [ 14.177501] ret_from_fork_asm+0x1a/0x30 [ 14.177845] [ 14.177940] The buggy address belongs to the object at ffff888103332300 [ 14.177940] which belongs to the cache kmalloc-128 of size 128 [ 14.178543] The buggy address is located 0 bytes inside of [ 14.178543] freed 128-byte region [ffff888103332300, ffff888103332380) [ 14.179416] [ 14.179737] The buggy address belongs to the physical page: [ 14.180250] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103332 [ 14.180558] flags: 0x200000000000000(node=0|zone=2) [ 14.180853] page_type: f5(slab) [ 14.181212] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 14.181796] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 14.182069] page dumped because: kasan: bad access detected [ 14.182387] [ 14.183095] Memory state around the buggy address: [ 14.183320] ffff888103332200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.183684] ffff888103332280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.184031] >ffff888103332300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.184284] ^ [ 14.184425] ffff888103332380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.184863] ffff888103332400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.185124] ================================================================== [ 14.223163] ================================================================== [ 14.223626] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5e4/0x6c0 [ 14.223970] Read of size 1 at addr ffff888103332378 by task kunit_try_catch/213 [ 14.224953] [ 14.225228] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 14.225284] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.225298] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.225324] Call Trace: [ 14.225340] <TASK> [ 14.225361] dump_stack_lvl+0x73/0xb0 [ 14.225396] print_report+0xd1/0x650 [ 14.225422] ? __virt_addr_valid+0x1db/0x2d0 [ 14.225449] ? ksize_uaf+0x5e4/0x6c0 [ 14.225473] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.225498] ? ksize_uaf+0x5e4/0x6c0 [ 14.225522] kasan_report+0x141/0x180 [ 14.225547] ? ksize_uaf+0x5e4/0x6c0 [ 14.225576] __asan_report_load1_noabort+0x18/0x20 [ 14.225604] ksize_uaf+0x5e4/0x6c0 [ 14.225627] ? __pfx_ksize_uaf+0x10/0x10 [ 14.225669] ? __schedule+0x10cc/0x2b60 [ 14.225695] ? __pfx_read_tsc+0x10/0x10 [ 14.225721] ? ktime_get_ts64+0x86/0x230 [ 14.225749] kunit_try_run_case+0x1a5/0x480 [ 14.225778] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.225803] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.225830] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.225857] ? __kthread_parkme+0x82/0x180 [ 14.225880] ? preempt_count_sub+0x50/0x80 [ 14.225908] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.225934] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.225960] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.225986] kthread+0x337/0x6f0 [ 14.226008] ? trace_preempt_on+0x20/0xc0 [ 14.226035] ? __pfx_kthread+0x10/0x10 [ 14.226058] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.226082] ? calculate_sigpending+0x7b/0xa0 [ 14.226110] ? __pfx_kthread+0x10/0x10 [ 14.226135] ret_from_fork+0x116/0x1d0 [ 14.226155] ? __pfx_kthread+0x10/0x10 [ 14.226179] ret_from_fork_asm+0x1a/0x30 [ 14.226214] </TASK> [ 14.226227] [ 14.236371] Allocated by task 213: [ 14.236546] kasan_save_stack+0x45/0x70 [ 14.237100] kasan_save_track+0x18/0x40 [ 14.237337] kasan_save_alloc_info+0x3b/0x50 [ 14.237579] __kasan_kmalloc+0xb7/0xc0 [ 14.238448] __kmalloc_cache_noprof+0x189/0x420 [ 14.238927] ksize_uaf+0xaa/0x6c0 [ 14.239303] kunit_try_run_case+0x1a5/0x480 [ 14.239555] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.239808] kthread+0x337/0x6f0 [ 14.240022] ret_from_fork+0x116/0x1d0 [ 14.240252] ret_from_fork_asm+0x1a/0x30 [ 14.240428] [ 14.240515] Freed by task 213: [ 14.240722] kasan_save_stack+0x45/0x70 [ 14.241029] kasan_save_track+0x18/0x40 [ 14.241193] kasan_save_free_info+0x3f/0x60 [ 14.241440] __kasan_slab_free+0x56/0x70 [ 14.241689] kfree+0x222/0x3f0 [ 14.241874] ksize_uaf+0x12c/0x6c0 [ 14.242070] kunit_try_run_case+0x1a5/0x480 [ 14.242322] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.242575] kthread+0x337/0x6f0 [ 14.242800] ret_from_fork+0x116/0x1d0 [ 14.243028] ret_from_fork_asm+0x1a/0x30 [ 14.243242] [ 14.243351] The buggy address belongs to the object at ffff888103332300 [ 14.243351] which belongs to the cache kmalloc-128 of size 128 [ 14.243933] The buggy address is located 120 bytes inside of [ 14.243933] freed 128-byte region [ffff888103332300, ffff888103332380) [ 14.244502] [ 14.244594] The buggy address belongs to the physical page: [ 14.244840] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103332 [ 14.245314] flags: 0x200000000000000(node=0|zone=2) [ 14.245513] page_type: f5(slab) [ 14.246314] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 14.246775] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 14.247145] page dumped because: kasan: bad access detected [ 14.247841] [ 14.247941] Memory state around the buggy address: [ 14.248434] ffff888103332200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.249107] ffff888103332280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.249477] >ffff888103332300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.249902] ^ [ 14.250254] ffff888103332380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.250616] ffff888103332400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.251401] ================================================================== [ 14.186637] ================================================================== [ 14.187019] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5fe/0x6c0 [ 14.187301] Read of size 1 at addr ffff888103332300 by task kunit_try_catch/213 [ 14.187585] [ 14.189773] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 14.189840] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.189855] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.189881] Call Trace: [ 14.189900] <TASK> [ 14.189925] dump_stack_lvl+0x73/0xb0 [ 14.189964] print_report+0xd1/0x650 [ 14.189990] ? __virt_addr_valid+0x1db/0x2d0 [ 14.190020] ? ksize_uaf+0x5fe/0x6c0 [ 14.190043] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.190068] ? ksize_uaf+0x5fe/0x6c0 [ 14.190092] kasan_report+0x141/0x180 [ 14.190117] ? ksize_uaf+0x5fe/0x6c0 [ 14.190146] __asan_report_load1_noabort+0x18/0x20 [ 14.190173] ksize_uaf+0x5fe/0x6c0 [ 14.190197] ? __pfx_ksize_uaf+0x10/0x10 [ 14.190223] ? __schedule+0x10cc/0x2b60 [ 14.190248] ? __pfx_read_tsc+0x10/0x10 [ 14.190273] ? ktime_get_ts64+0x86/0x230 [ 14.190303] kunit_try_run_case+0x1a5/0x480 [ 14.190332] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.190357] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.190384] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.190409] ? __kthread_parkme+0x82/0x180 [ 14.190440] ? preempt_count_sub+0x50/0x80 [ 14.190467] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.190493] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.190518] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.190544] kthread+0x337/0x6f0 [ 14.190566] ? trace_preempt_on+0x20/0xc0 [ 14.190592] ? __pfx_kthread+0x10/0x10 [ 14.190615] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.190639] ? calculate_sigpending+0x7b/0xa0 [ 14.191274] ? __pfx_kthread+0x10/0x10 [ 14.191311] ret_from_fork+0x116/0x1d0 [ 14.191336] ? __pfx_kthread+0x10/0x10 [ 14.191359] ret_from_fork_asm+0x1a/0x30 [ 14.191397] </TASK> [ 14.191410] [ 14.205070] Allocated by task 213: [ 14.205360] kasan_save_stack+0x45/0x70 [ 14.205786] kasan_save_track+0x18/0x40 [ 14.206141] kasan_save_alloc_info+0x3b/0x50 [ 14.206385] __kasan_kmalloc+0xb7/0xc0 [ 14.206601] __kmalloc_cache_noprof+0x189/0x420 [ 14.207170] ksize_uaf+0xaa/0x6c0 [ 14.207513] kunit_try_run_case+0x1a5/0x480 [ 14.207971] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.208440] kthread+0x337/0x6f0 [ 14.208898] ret_from_fork+0x116/0x1d0 [ 14.209151] ret_from_fork_asm+0x1a/0x30 [ 14.209369] [ 14.209477] Freed by task 213: [ 14.209921] kasan_save_stack+0x45/0x70 [ 14.210215] kasan_save_track+0x18/0x40 [ 14.210633] kasan_save_free_info+0x3f/0x60 [ 14.211049] __kasan_slab_free+0x56/0x70 [ 14.211279] kfree+0x222/0x3f0 [ 14.211460] ksize_uaf+0x12c/0x6c0 [ 14.211666] kunit_try_run_case+0x1a5/0x480 [ 14.211931] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.212212] kthread+0x337/0x6f0 [ 14.212355] ret_from_fork+0x116/0x1d0 [ 14.212583] ret_from_fork_asm+0x1a/0x30 [ 14.212811] [ 14.212899] The buggy address belongs to the object at ffff888103332300 [ 14.212899] which belongs to the cache kmalloc-128 of size 128 [ 14.213692] The buggy address is located 0 bytes inside of [ 14.213692] freed 128-byte region [ffff888103332300, ffff888103332380) [ 14.214401] [ 14.214530] The buggy address belongs to the physical page: [ 14.215251] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103332 [ 14.215937] flags: 0x200000000000000(node=0|zone=2) [ 14.216324] page_type: f5(slab) [ 14.216490] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 14.217174] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 14.217679] page dumped because: kasan: bad access detected [ 14.218021] [ 14.218121] Memory state around the buggy address: [ 14.218407] ffff888103332200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.218766] ffff888103332280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.219128] >ffff888103332300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.219476] ^ [ 14.220125] ffff888103332380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.220469] ffff888103332400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.220848] ==================================================================