Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.229378] ================================================================== [ 22.229514] BUG: KASAN: slab-use-after-free in ksize_uaf+0x544/0x5f8 [ 22.229822] Read of size 1 at addr fff00000c794b578 by task kunit_try_catch/198 [ 22.230012] [ 22.230104] CPU: 0 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 22.230289] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.230352] Hardware name: linux,dummy-virt (DT) [ 22.230629] Call trace: [ 22.230687] show_stack+0x20/0x38 (C) [ 22.230815] dump_stack_lvl+0x8c/0xd0 [ 22.230926] print_report+0x118/0x608 [ 22.231031] kasan_report+0xdc/0x128 [ 22.231134] __asan_report_load1_noabort+0x20/0x30 [ 22.231332] ksize_uaf+0x544/0x5f8 [ 22.231520] kunit_try_run_case+0x170/0x3f0 [ 22.231715] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.231865] kthread+0x328/0x630 [ 22.232009] ret_from_fork+0x10/0x20 [ 22.232187] [ 22.232309] Allocated by task 198: [ 22.232388] kasan_save_stack+0x3c/0x68 [ 22.232483] kasan_save_track+0x20/0x40 [ 22.232817] kasan_save_alloc_info+0x40/0x58 [ 22.232920] __kasan_kmalloc+0xd4/0xd8 [ 22.233180] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.233425] ksize_uaf+0xb8/0x5f8 [ 22.233704] kunit_try_run_case+0x170/0x3f0 [ 22.233874] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.233992] kthread+0x328/0x630 [ 22.234075] ret_from_fork+0x10/0x20 [ 22.234147] [ 22.234182] Freed by task 198: [ 22.234241] kasan_save_stack+0x3c/0x68 [ 22.234330] kasan_save_track+0x20/0x40 [ 22.234422] kasan_save_free_info+0x4c/0x78 [ 22.234519] __kasan_slab_free+0x6c/0x98 [ 22.235248] kfree+0x214/0x3c8 [ 22.235551] ksize_uaf+0x11c/0x5f8 [ 22.236026] kunit_try_run_case+0x170/0x3f0 [ 22.236144] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.236201] kthread+0x328/0x630 [ 22.236243] ret_from_fork+0x10/0x20 [ 22.236283] [ 22.236309] The buggy address belongs to the object at fff00000c794b500 [ 22.236309] which belongs to the cache kmalloc-128 of size 128 [ 22.236379] The buggy address is located 120 bytes inside of [ 22.236379] freed 128-byte region [fff00000c794b500, fff00000c794b580) [ 22.236447] [ 22.236471] The buggy address belongs to the physical page: [ 22.236508] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10794b [ 22.236565] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.236625] page_type: f5(slab) [ 22.236673] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 22.236747] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.236801] page dumped because: kasan: bad access detected [ 22.236836] [ 22.236861] Memory state around the buggy address: [ 22.236899] fff00000c794b400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.236947] fff00000c794b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.236992] >fff00000c794b500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.237033] ^ [ 22.237080] fff00000c794b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.237125] fff00000c794b600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.237166] ================================================================== [ 22.218516] ================================================================== [ 22.218752] BUG: KASAN: slab-use-after-free in ksize_uaf+0x598/0x5f8 [ 22.218885] Read of size 1 at addr fff00000c794b500 by task kunit_try_catch/198 [ 22.218982] [ 22.219066] CPU: 0 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 22.219325] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.219412] Hardware name: linux,dummy-virt (DT) [ 22.219488] Call trace: [ 22.219547] show_stack+0x20/0x38 (C) [ 22.219661] dump_stack_lvl+0x8c/0xd0 [ 22.219792] print_report+0x118/0x608 [ 22.219914] kasan_report+0xdc/0x128 [ 22.220067] __asan_report_load1_noabort+0x20/0x30 [ 22.220194] ksize_uaf+0x598/0x5f8 [ 22.220314] kunit_try_run_case+0x170/0x3f0 [ 22.220473] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.220653] kthread+0x328/0x630 [ 22.220782] ret_from_fork+0x10/0x20 [ 22.220883] [ 22.220928] Allocated by task 198: [ 22.220989] kasan_save_stack+0x3c/0x68 [ 22.221104] kasan_save_track+0x20/0x40 [ 22.221414] kasan_save_alloc_info+0x40/0x58 [ 22.221627] __kasan_kmalloc+0xd4/0xd8 [ 22.221933] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.222147] ksize_uaf+0xb8/0x5f8 [ 22.222228] kunit_try_run_case+0x170/0x3f0 [ 22.222313] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.222417] kthread+0x328/0x630 [ 22.222683] ret_from_fork+0x10/0x20 [ 22.222787] [ 22.222835] Freed by task 198: [ 22.222906] kasan_save_stack+0x3c/0x68 [ 22.223036] kasan_save_track+0x20/0x40 [ 22.223117] kasan_save_free_info+0x4c/0x78 [ 22.223211] __kasan_slab_free+0x6c/0x98 [ 22.223311] kfree+0x214/0x3c8 [ 22.223419] ksize_uaf+0x11c/0x5f8 [ 22.223518] kunit_try_run_case+0x170/0x3f0 [ 22.223637] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.223763] kthread+0x328/0x630 [ 22.223885] ret_from_fork+0x10/0x20 [ 22.224057] [ 22.224191] The buggy address belongs to the object at fff00000c794b500 [ 22.224191] which belongs to the cache kmalloc-128 of size 128 [ 22.224337] The buggy address is located 0 bytes inside of [ 22.224337] freed 128-byte region [fff00000c794b500, fff00000c794b580) [ 22.224476] [ 22.224527] The buggy address belongs to the physical page: [ 22.224862] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10794b [ 22.225085] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.225227] page_type: f5(slab) [ 22.225317] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 22.225431] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.225774] page dumped because: kasan: bad access detected [ 22.225881] [ 22.226011] Memory state around the buggy address: [ 22.226096] fff00000c794b400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.226278] fff00000c794b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.226402] >fff00000c794b500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.226546] ^ [ 22.226669] fff00000c794b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.226847] fff00000c794b600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.227048] ================================================================== [ 22.202977] ================================================================== [ 22.203331] BUG: KASAN: slab-use-after-free in ksize_uaf+0x168/0x5f8 [ 22.203797] Read of size 1 at addr fff00000c794b500 by task kunit_try_catch/198 [ 22.203927] [ 22.204293] CPU: 0 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 22.204791] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.205005] Hardware name: linux,dummy-virt (DT) [ 22.205089] Call trace: [ 22.205154] show_stack+0x20/0x38 (C) [ 22.205633] dump_stack_lvl+0x8c/0xd0 [ 22.205901] print_report+0x118/0x608 [ 22.206155] kasan_report+0xdc/0x128 [ 22.206426] __kasan_check_byte+0x54/0x70 [ 22.206560] ksize+0x30/0x88 [ 22.206670] ksize_uaf+0x168/0x5f8 [ 22.207235] kunit_try_run_case+0x170/0x3f0 [ 22.207454] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.207919] kthread+0x328/0x630 [ 22.208063] ret_from_fork+0x10/0x20 [ 22.208287] [ 22.208336] Allocated by task 198: [ 22.208411] kasan_save_stack+0x3c/0x68 [ 22.208516] kasan_save_track+0x20/0x40 [ 22.208613] kasan_save_alloc_info+0x40/0x58 [ 22.208712] __kasan_kmalloc+0xd4/0xd8 [ 22.208804] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.208900] ksize_uaf+0xb8/0x5f8 [ 22.208995] kunit_try_run_case+0x170/0x3f0 [ 22.209099] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.209211] kthread+0x328/0x630 [ 22.210001] ret_from_fork+0x10/0x20 [ 22.210128] [ 22.210266] Freed by task 198: [ 22.210394] kasan_save_stack+0x3c/0x68 [ 22.210680] kasan_save_track+0x20/0x40 [ 22.210795] kasan_save_free_info+0x4c/0x78 [ 22.210892] __kasan_slab_free+0x6c/0x98 [ 22.210976] kfree+0x214/0x3c8 [ 22.211194] ksize_uaf+0x11c/0x5f8 [ 22.211423] kunit_try_run_case+0x170/0x3f0 [ 22.211665] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.212057] kthread+0x328/0x630 [ 22.212209] ret_from_fork+0x10/0x20 [ 22.212297] [ 22.212355] The buggy address belongs to the object at fff00000c794b500 [ 22.212355] which belongs to the cache kmalloc-128 of size 128 [ 22.212510] The buggy address is located 0 bytes inside of [ 22.212510] freed 128-byte region [fff00000c794b500, fff00000c794b580) [ 22.212666] [ 22.212717] The buggy address belongs to the physical page: [ 22.212812] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10794b [ 22.212947] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.213510] page_type: f5(slab) [ 22.213713] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 22.213994] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 22.214135] page dumped because: kasan: bad access detected [ 22.214304] [ 22.214425] Memory state around the buggy address: [ 22.214642] fff00000c794b400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.214936] fff00000c794b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.215061] >fff00000c794b500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.215163] ^ [ 22.215238] fff00000c794b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.215346] fff00000c794b600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.215443] ==================================================================
[ 20.123264] ================================================================== [ 20.126513] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5fe/0x6c0 [ 20.129358] Read of size 1 at addr ffff888102ed7500 by task kunit_try_catch/216 [ 20.130255] [ 20.131304] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 20.131430] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.131465] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.131516] Call Trace: [ 20.131563] <TASK> [ 20.131610] dump_stack_lvl+0x73/0xb0 [ 20.131693] print_report+0xd1/0x650 [ 20.131756] ? __virt_addr_valid+0x1db/0x2d0 [ 20.131812] ? ksize_uaf+0x5fe/0x6c0 [ 20.131871] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.131944] ? ksize_uaf+0x5fe/0x6c0 [ 20.132002] kasan_report+0x141/0x180 [ 20.132059] ? ksize_uaf+0x5fe/0x6c0 [ 20.132128] __asan_report_load1_noabort+0x18/0x20 [ 20.132178] ksize_uaf+0x5fe/0x6c0 [ 20.132236] ? __pfx_ksize_uaf+0x10/0x10 [ 20.132698] ? __schedule+0x10cc/0x2b60 [ 20.132780] ? __pfx_read_tsc+0x10/0x10 [ 20.132841] ? ktime_get_ts64+0x86/0x230 [ 20.132911] kunit_try_run_case+0x1a5/0x480 [ 20.133513] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.133574] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.133634] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.133690] ? __kthread_parkme+0x82/0x180 [ 20.133744] ? preempt_count_sub+0x50/0x80 [ 20.133802] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.133859] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.133914] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.134107] kthread+0x337/0x6f0 [ 20.134158] ? trace_preempt_on+0x20/0xc0 [ 20.134215] ? __pfx_kthread+0x10/0x10 [ 20.134258] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.134352] ? calculate_sigpending+0x7b/0xa0 [ 20.134424] ? __pfx_kthread+0x10/0x10 [ 20.134487] ret_from_fork+0x41/0x80 [ 20.134557] ? __pfx_kthread+0x10/0x10 [ 20.134619] ret_from_fork_asm+0x1a/0x30 [ 20.134698] </TASK> [ 20.134732] [ 20.153311] Allocated by task 216: [ 20.153764] kasan_save_stack+0x45/0x70 [ 20.154696] kasan_save_track+0x18/0x40 [ 20.155453] kasan_save_alloc_info+0x3b/0x50 [ 20.155930] __kasan_kmalloc+0xb7/0xc0 [ 20.156522] __kmalloc_cache_noprof+0x189/0x420 [ 20.157738] ksize_uaf+0xaa/0x6c0 [ 20.158092] kunit_try_run_case+0x1a5/0x480 [ 20.158822] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.159636] kthread+0x337/0x6f0 [ 20.159787] ret_from_fork+0x41/0x80 [ 20.159959] ret_from_fork_asm+0x1a/0x30 [ 20.160560] [ 20.161039] Freed by task 216: [ 20.162419] kasan_save_stack+0x45/0x70 [ 20.162745] kasan_save_track+0x18/0x40 [ 20.163549] kasan_save_free_info+0x3f/0x60 [ 20.163914] __kasan_slab_free+0x56/0x70 [ 20.165049] kfree+0x222/0x3f0 [ 20.165600] ksize_uaf+0x12c/0x6c0 [ 20.165902] kunit_try_run_case+0x1a5/0x480 [ 20.167224] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.167608] kthread+0x337/0x6f0 [ 20.168000] ret_from_fork+0x41/0x80 [ 20.168864] ret_from_fork_asm+0x1a/0x30 [ 20.169572] [ 20.169821] The buggy address belongs to the object at ffff888102ed7500 [ 20.169821] which belongs to the cache kmalloc-128 of size 128 [ 20.171684] The buggy address is located 0 bytes inside of [ 20.171684] freed 128-byte region [ffff888102ed7500, ffff888102ed7580) [ 20.173738] [ 20.174179] The buggy address belongs to the physical page: [ 20.175579] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ed7 [ 20.176386] flags: 0x200000000000000(node=0|zone=2) [ 20.176877] page_type: f5(slab) [ 20.177647] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 20.178575] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 20.179462] page dumped because: kasan: bad access detected [ 20.179895] [ 20.180156] Memory state around the buggy address: [ 20.181281] ffff888102ed7400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.181960] ffff888102ed7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.182752] >ffff888102ed7500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.182994] ^ [ 20.183918] ffff888102ed7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.184462] ffff888102ed7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.185030] ================================================================== [ 20.062256] ================================================================== [ 20.063632] BUG: KASAN: slab-use-after-free in ksize_uaf+0x19d/0x6c0 [ 20.064216] Read of size 1 at addr ffff888102ed7500 by task kunit_try_catch/216 [ 20.066274] [ 20.066742] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 20.066875] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.066899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.066939] Call Trace: [ 20.066981] <TASK> [ 20.067282] dump_stack_lvl+0x73/0xb0 [ 20.067366] print_report+0xd1/0x650 [ 20.067408] ? __virt_addr_valid+0x1db/0x2d0 [ 20.067446] ? ksize_uaf+0x19d/0x6c0 [ 20.067479] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.067515] ? ksize_uaf+0x19d/0x6c0 [ 20.067549] kasan_report+0x141/0x180 [ 20.067583] ? ksize_uaf+0x19d/0x6c0 [ 20.067621] ? ksize_uaf+0x19d/0x6c0 [ 20.067653] __kasan_check_byte+0x3d/0x50 [ 20.067687] ksize+0x20/0x60 [ 20.067719] ksize_uaf+0x19d/0x6c0 [ 20.067752] ? __pfx_ksize_uaf+0x10/0x10 [ 20.067785] ? __schedule+0x10cc/0x2b60 [ 20.067820] ? __pfx_read_tsc+0x10/0x10 [ 20.067854] ? ktime_get_ts64+0x86/0x230 [ 20.067915] kunit_try_run_case+0x1a5/0x480 [ 20.068238] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.068315] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.068360] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.068398] ? __kthread_parkme+0x82/0x180 [ 20.068434] ? preempt_count_sub+0x50/0x80 [ 20.068473] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.068510] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.068546] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.068582] kthread+0x337/0x6f0 [ 20.068608] ? trace_preempt_on+0x20/0xc0 [ 20.068646] ? __pfx_kthread+0x10/0x10 [ 20.068674] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.068707] ? calculate_sigpending+0x7b/0xa0 [ 20.068740] ? __pfx_kthread+0x10/0x10 [ 20.068768] ret_from_fork+0x41/0x80 [ 20.068803] ? __pfx_kthread+0x10/0x10 [ 20.068832] ret_from_fork_asm+0x1a/0x30 [ 20.068880] </TASK> [ 20.068896] [ 20.092392] Allocated by task 216: [ 20.093005] kasan_save_stack+0x45/0x70 [ 20.093702] kasan_save_track+0x18/0x40 [ 20.093878] kasan_save_alloc_info+0x3b/0x50 [ 20.094074] __kasan_kmalloc+0xb7/0xc0 [ 20.094240] __kmalloc_cache_noprof+0x189/0x420 [ 20.094966] ksize_uaf+0xaa/0x6c0 [ 20.095884] kunit_try_run_case+0x1a5/0x480 [ 20.096370] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.096860] kthread+0x337/0x6f0 [ 20.097515] ret_from_fork+0x41/0x80 [ 20.097836] ret_from_fork_asm+0x1a/0x30 [ 20.098245] [ 20.098658] Freed by task 216: [ 20.098994] kasan_save_stack+0x45/0x70 [ 20.099454] kasan_save_track+0x18/0x40 [ 20.099964] kasan_save_free_info+0x3f/0x60 [ 20.100328] __kasan_slab_free+0x56/0x70 [ 20.100767] kfree+0x222/0x3f0 [ 20.101139] ksize_uaf+0x12c/0x6c0 [ 20.102119] kunit_try_run_case+0x1a5/0x480 [ 20.102552] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.103014] kthread+0x337/0x6f0 [ 20.103406] ret_from_fork+0x41/0x80 [ 20.103810] ret_from_fork_asm+0x1a/0x30 [ 20.104454] [ 20.104650] The buggy address belongs to the object at ffff888102ed7500 [ 20.104650] which belongs to the cache kmalloc-128 of size 128 [ 20.105686] The buggy address is located 0 bytes inside of [ 20.105686] freed 128-byte region [ffff888102ed7500, ffff888102ed7580) [ 20.107998] [ 20.108945] The buggy address belongs to the physical page: [ 20.109427] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ed7 [ 20.110112] flags: 0x200000000000000(node=0|zone=2) [ 20.110583] page_type: f5(slab) [ 20.110939] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 20.112570] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 20.112827] page dumped because: kasan: bad access detected [ 20.113335] [ 20.113920] Memory state around the buggy address: [ 20.114434] ffff888102ed7400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.115653] ffff888102ed7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.116307] >ffff888102ed7500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.117511] ^ [ 20.118062] ffff888102ed7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.118884] ffff888102ed7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.120183] ================================================================== [ 20.187074] ================================================================== [ 20.188483] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5e4/0x6c0 [ 20.189104] Read of size 1 at addr ffff888102ed7578 by task kunit_try_catch/216 [ 20.190836] [ 20.191187] CPU: 1 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 20.191328] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.191363] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.191416] Call Trace: [ 20.191468] <TASK> [ 20.191518] dump_stack_lvl+0x73/0xb0 [ 20.191585] print_report+0xd1/0x650 [ 20.191624] ? __virt_addr_valid+0x1db/0x2d0 [ 20.191659] ? ksize_uaf+0x5e4/0x6c0 [ 20.191691] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.191724] ? ksize_uaf+0x5e4/0x6c0 [ 20.191757] kasan_report+0x141/0x180 [ 20.191791] ? ksize_uaf+0x5e4/0x6c0 [ 20.191832] __asan_report_load1_noabort+0x18/0x20 [ 20.191865] ksize_uaf+0x5e4/0x6c0 [ 20.191916] ? __pfx_ksize_uaf+0x10/0x10 [ 20.191960] ? __schedule+0x10cc/0x2b60 [ 20.192489] ? __pfx_read_tsc+0x10/0x10 [ 20.192527] ? ktime_get_ts64+0x86/0x230 [ 20.192569] kunit_try_run_case+0x1a5/0x480 [ 20.192610] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.192647] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.192686] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.192722] ? __kthread_parkme+0x82/0x180 [ 20.192757] ? preempt_count_sub+0x50/0x80 [ 20.192794] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.192831] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.192867] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.192901] kthread+0x337/0x6f0 [ 20.192928] ? trace_preempt_on+0x20/0xc0 [ 20.192990] ? __pfx_kthread+0x10/0x10 [ 20.193062] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.193140] ? calculate_sigpending+0x7b/0xa0 [ 20.193193] ? __pfx_kthread+0x10/0x10 [ 20.193223] ret_from_fork+0x41/0x80 [ 20.193259] ? __pfx_kthread+0x10/0x10 [ 20.193307] ret_from_fork_asm+0x1a/0x30 [ 20.193361] </TASK> [ 20.193379] [ 20.214425] Allocated by task 216: [ 20.214845] kasan_save_stack+0x45/0x70 [ 20.215320] kasan_save_track+0x18/0x40 [ 20.215734] kasan_save_alloc_info+0x3b/0x50 [ 20.216154] __kasan_kmalloc+0xb7/0xc0 [ 20.217500] __kmalloc_cache_noprof+0x189/0x420 [ 20.217965] ksize_uaf+0xaa/0x6c0 [ 20.218396] kunit_try_run_case+0x1a5/0x480 [ 20.218822] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.219346] kthread+0x337/0x6f0 [ 20.219856] ret_from_fork+0x41/0x80 [ 20.220198] ret_from_fork_asm+0x1a/0x30 [ 20.220611] [ 20.221660] Freed by task 216: [ 20.222488] kasan_save_stack+0x45/0x70 [ 20.223441] kasan_save_track+0x18/0x40 [ 20.223977] kasan_save_free_info+0x3f/0x60 [ 20.224396] __kasan_slab_free+0x56/0x70 [ 20.224785] kfree+0x222/0x3f0 [ 20.225122] ksize_uaf+0x12c/0x6c0 [ 20.226213] kunit_try_run_case+0x1a5/0x480 [ 20.227218] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.228378] kthread+0x337/0x6f0 [ 20.228654] ret_from_fork+0x41/0x80 [ 20.228992] ret_from_fork_asm+0x1a/0x30 [ 20.229385] [ 20.229550] The buggy address belongs to the object at ffff888102ed7500 [ 20.229550] which belongs to the cache kmalloc-128 of size 128 [ 20.231274] The buggy address is located 120 bytes inside of [ 20.231274] freed 128-byte region [ffff888102ed7500, ffff888102ed7580) [ 20.233253] [ 20.233477] The buggy address belongs to the physical page: [ 20.234422] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ed7 [ 20.235352] flags: 0x200000000000000(node=0|zone=2) [ 20.235922] page_type: f5(slab) [ 20.236819] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 20.237606] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 [ 20.238214] page dumped because: kasan: bad access detected [ 20.239537] [ 20.239734] Memory state around the buggy address: [ 20.240724] ffff888102ed7400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.241558] ffff888102ed7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.242066] >ffff888102ed7500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.243567] ^ [ 20.244528] ffff888102ed7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.245323] ffff888102ed7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.245910] ==================================================================