Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.529409] ================================================================== [ 20.529976] BUG: KASAN: slab-use-after-free in ksize_uaf+0x578/0x5d0 [ 20.530529] Read of size 1 at addr fff00000c6492d00 by task kunit_try_catch/183 [ 20.530961] [ 20.531576] CPU: 1 UID: 0 PID: 183 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 20.531804] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.531877] Hardware name: linux,dummy-virt (DT) [ 20.531957] Call trace: [ 20.532010] dump_backtrace+0x9c/0x128 [ 20.532894] show_stack+0x20/0x38 [ 20.532962] dump_stack_lvl+0x8c/0xd0 [ 20.533014] print_report+0x118/0x5f0 [ 20.533057] kasan_report+0xdc/0x128 [ 20.533099] __asan_report_load1_noabort+0x20/0x30 [ 20.533145] ksize_uaf+0x578/0x5d0 [ 20.533189] kunit_try_run_case+0x170/0x3f0 [ 20.533233] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.533319] kthread+0x24c/0x2d0 [ 20.533363] ret_from_fork+0x10/0x20 [ 20.533411] [ 20.538819] Allocated by task 183: [ 20.539535] kasan_save_stack+0x3c/0x68 [ 20.540171] kasan_save_track+0x20/0x40 [ 20.540619] kasan_save_alloc_info+0x40/0x58 [ 20.541128] __kasan_kmalloc+0xd4/0xd8 [ 20.541523] __kmalloc_cache_noprof+0x154/0x320 [ 20.542072] ksize_uaf+0xb8/0x5d0 [ 20.542545] kunit_try_run_case+0x170/0x3f0 [ 20.542907] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.543752] kthread+0x24c/0x2d0 [ 20.544151] ret_from_fork+0x10/0x20 [ 20.544567] [ 20.544885] Freed by task 183: [ 20.545221] kasan_save_stack+0x3c/0x68 [ 20.545732] kasan_save_track+0x20/0x40 [ 20.546191] kasan_save_free_info+0x4c/0x78 [ 20.546733] __kasan_slab_free+0x6c/0x98 [ 20.547553] kfree+0x110/0x3b8 [ 20.547958] ksize_uaf+0x120/0x5d0 [ 20.548205] kunit_try_run_case+0x170/0x3f0 [ 20.548477] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.548853] kthread+0x24c/0x2d0 [ 20.549326] ret_from_fork+0x10/0x20 [ 20.549809] [ 20.550346] The buggy address belongs to the object at fff00000c6492d00 [ 20.550346] which belongs to the cache kmalloc-128 of size 128 [ 20.551898] The buggy address is located 0 bytes inside of [ 20.551898] freed 128-byte region [fff00000c6492d00, fff00000c6492d80) [ 20.552786] [ 20.553060] The buggy address belongs to the physical page: [ 20.553674] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106492 [ 20.554274] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.554848] page_type: f5(slab) [ 20.555598] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 20.556285] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 20.556816] page dumped because: kasan: bad access detected [ 20.557318] [ 20.557603] Memory state around the buggy address: [ 20.557989] fff00000c6492c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.558639] fff00000c6492c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.559169] >fff00000c6492d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.560011] ^ [ 20.560445] fff00000c6492d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.561084] fff00000c6492e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.561661] ================================================================== [ 20.493577] ================================================================== [ 20.494341] BUG: KASAN: slab-use-after-free in ksize_uaf+0x174/0x5d0 [ 20.495138] Read of size 1 at addr fff00000c6492d00 by task kunit_try_catch/183 [ 20.496223] [ 20.496597] CPU: 1 UID: 0 PID: 183 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 20.496834] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.496920] Hardware name: linux,dummy-virt (DT) [ 20.497004] Call trace: [ 20.497060] dump_backtrace+0x9c/0x128 [ 20.497143] show_stack+0x20/0x38 [ 20.497188] dump_stack_lvl+0x8c/0xd0 [ 20.497256] print_report+0x118/0x5f0 [ 20.497325] kasan_report+0xdc/0x128 [ 20.497368] __kasan_check_byte+0x54/0x70 [ 20.497411] ksize+0x30/0x88 [ 20.497451] ksize_uaf+0x174/0x5d0 [ 20.497508] kunit_try_run_case+0x170/0x3f0 [ 20.497559] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.497611] kthread+0x24c/0x2d0 [ 20.497653] ret_from_fork+0x10/0x20 [ 20.497701] [ 20.503536] Allocated by task 183: [ 20.504041] kasan_save_stack+0x3c/0x68 [ 20.504505] kasan_save_track+0x20/0x40 [ 20.504998] kasan_save_alloc_info+0x40/0x58 [ 20.505540] __kasan_kmalloc+0xd4/0xd8 [ 20.506007] __kmalloc_cache_noprof+0x154/0x320 [ 20.506438] ksize_uaf+0xb8/0x5d0 [ 20.506925] kunit_try_run_case+0x170/0x3f0 [ 20.507724] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.508266] kthread+0x24c/0x2d0 [ 20.508694] ret_from_fork+0x10/0x20 [ 20.509114] [ 20.509421] Freed by task 183: [ 20.509806] kasan_save_stack+0x3c/0x68 [ 20.510249] kasan_save_track+0x20/0x40 [ 20.510755] kasan_save_free_info+0x4c/0x78 [ 20.511568] __kasan_slab_free+0x6c/0x98 [ 20.511968] kfree+0x110/0x3b8 [ 20.512443] ksize_uaf+0x120/0x5d0 [ 20.512839] kunit_try_run_case+0x170/0x3f0 [ 20.513282] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.513882] kthread+0x24c/0x2d0 [ 20.514284] ret_from_fork+0x10/0x20 [ 20.514759] [ 20.515035] The buggy address belongs to the object at fff00000c6492d00 [ 20.515035] which belongs to the cache kmalloc-128 of size 128 [ 20.516102] The buggy address is located 0 bytes inside of [ 20.516102] freed 128-byte region [fff00000c6492d00, fff00000c6492d80) [ 20.517014] [ 20.517342] The buggy address belongs to the physical page: [ 20.517869] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106492 [ 20.518659] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.519310] page_type: f5(slab) [ 20.520120] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 20.520800] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 20.521314] page dumped because: kasan: bad access detected [ 20.521885] [ 20.522166] Memory state around the buggy address: [ 20.522627] fff00000c6492c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.523278] fff00000c6492c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.524088] >fff00000c6492d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.524640] ^ [ 20.525072] fff00000c6492d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.525639] fff00000c6492e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.526161] ================================================================== [ 20.564889] ================================================================== [ 20.565334] BUG: KASAN: slab-use-after-free in ksize_uaf+0x53c/0x5d0 [ 20.565896] Read of size 1 at addr fff00000c6492d78 by task kunit_try_catch/183 [ 20.566461] [ 20.566770] CPU: 1 UID: 0 PID: 183 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 20.566969] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.567039] Hardware name: linux,dummy-virt (DT) [ 20.567542] Call trace: [ 20.567632] dump_backtrace+0x9c/0x128 [ 20.567753] show_stack+0x20/0x38 [ 20.567801] dump_stack_lvl+0x8c/0xd0 [ 20.567849] print_report+0x118/0x5f0 [ 20.567893] kasan_report+0xdc/0x128 [ 20.567935] __asan_report_load1_noabort+0x20/0x30 [ 20.567983] ksize_uaf+0x53c/0x5d0 [ 20.568025] kunit_try_run_case+0x170/0x3f0 [ 20.568074] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.568124] kthread+0x24c/0x2d0 [ 20.568165] ret_from_fork+0x10/0x20 [ 20.568213] [ 20.573405] Allocated by task 183: [ 20.573897] kasan_save_stack+0x3c/0x68 [ 20.574453] kasan_save_track+0x20/0x40 [ 20.574957] kasan_save_alloc_info+0x40/0x58 [ 20.575869] __kasan_kmalloc+0xd4/0xd8 [ 20.576323] __kmalloc_cache_noprof+0x154/0x320 [ 20.576921] ksize_uaf+0xb8/0x5d0 [ 20.577385] kunit_try_run_case+0x170/0x3f0 [ 20.577848] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.578388] kthread+0x24c/0x2d0 [ 20.578843] ret_from_fork+0x10/0x20 [ 20.579527] [ 20.579841] Freed by task 183: [ 20.580208] kasan_save_stack+0x3c/0x68 [ 20.580654] kasan_save_track+0x20/0x40 [ 20.581125] kasan_save_free_info+0x4c/0x78 [ 20.581541] __kasan_slab_free+0x6c/0x98 [ 20.582043] kfree+0x110/0x3b8 [ 20.582391] ksize_uaf+0x120/0x5d0 [ 20.582877] kunit_try_run_case+0x170/0x3f0 [ 20.583546] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.584202] kthread+0x24c/0x2d0 [ 20.584598] ret_from_fork+0x10/0x20 [ 20.585033] [ 20.585321] The buggy address belongs to the object at fff00000c6492d00 [ 20.585321] which belongs to the cache kmalloc-128 of size 128 [ 20.586286] The buggy address is located 120 bytes inside of [ 20.586286] freed 128-byte region [fff00000c6492d00, fff00000c6492d80) [ 20.588261] [ 20.588582] The buggy address belongs to the physical page: [ 20.588988] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106492 [ 20.589761] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.590424] page_type: f5(slab) [ 20.590885] raw: 0bfffe0000000000 fff00000c0001a00 dead000000000122 0000000000000000 [ 20.591629] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 20.592463] page dumped because: kasan: bad access detected [ 20.592965] [ 20.593229] Memory state around the buggy address: [ 20.593786] fff00000c6492c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.594321] fff00000c6492c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.594987] >fff00000c6492d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.595536] ^ [ 20.596320] fff00000c6492d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.596941] fff00000c6492e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.597595] ==================================================================
[ 12.545736] ================================================================== [ 12.546203] BUG: KASAN: slab-use-after-free in ksize_uaf+0x19e/0x6c0 [ 12.546800] Read of size 1 at addr ffff88810261ce00 by task kunit_try_catch/201 [ 12.547267] [ 12.547450] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.547540] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.547563] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.547598] Call Trace: [ 12.547623] <TASK> [ 12.547651] dump_stack_lvl+0x73/0xb0 [ 12.547740] print_report+0xd1/0x640 [ 12.547783] ? __virt_addr_valid+0x1db/0x2d0 [ 12.547822] ? ksize_uaf+0x19e/0x6c0 [ 12.547853] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.547893] ? ksize_uaf+0x19e/0x6c0 [ 12.547939] kasan_report+0x140/0x180 [ 12.547980] ? ksize_uaf+0x19e/0x6c0 [ 12.548018] ? ksize_uaf+0x19e/0x6c0 [ 12.548083] __kasan_check_byte+0x3d/0x50 [ 12.548129] ksize+0x20/0x60 [ 12.548162] ksize_uaf+0x19e/0x6c0 [ 12.548182] ? __pfx_ksize_uaf+0x10/0x10 [ 12.548200] ? __schedule+0xc49/0x27a0 [ 12.548220] ? __pfx_read_tsc+0x10/0x10 [ 12.548238] ? ktime_get_ts64+0x84/0x230 [ 12.548265] kunit_try_run_case+0x1a6/0x480 [ 12.548286] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.548304] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.548324] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.548347] ? __kthread_parkme+0x82/0x160 [ 12.548365] ? preempt_count_sub+0x50/0x80 [ 12.548388] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.548406] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.548429] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.548453] kthread+0x257/0x310 [ 12.548470] ? __pfx_kthread+0x10/0x10 [ 12.548488] ret_from_fork+0x41/0x80 [ 12.548506] ? __pfx_kthread+0x10/0x10 [ 12.548524] ret_from_fork_asm+0x1a/0x30 [ 12.548552] </TASK> [ 12.548563] [ 12.555834] Allocated by task 201: [ 12.556145] kasan_save_stack+0x45/0x70 [ 12.556465] kasan_save_track+0x18/0x40 [ 12.556749] kasan_save_alloc_info+0x3b/0x50 [ 12.557081] __kasan_kmalloc+0xb7/0xc0 [ 12.557355] __kmalloc_cache_noprof+0x168/0x350 [ 12.557685] ksize_uaf+0xab/0x6c0 [ 12.557934] kunit_try_run_case+0x1a6/0x480 [ 12.558237] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.558576] kthread+0x257/0x310 [ 12.558749] ret_from_fork+0x41/0x80 [ 12.558917] ret_from_fork_asm+0x1a/0x30 [ 12.559202] [ 12.559348] Freed by task 201: [ 12.559580] kasan_save_stack+0x45/0x70 [ 12.559867] kasan_save_track+0x18/0x40 [ 12.560167] kasan_save_free_info+0x3f/0x60 [ 12.560455] __kasan_slab_free+0x56/0x70 [ 12.560753] kfree+0x123/0x3d0 [ 12.560943] ksize_uaf+0x12d/0x6c0 [ 12.561193] kunit_try_run_case+0x1a6/0x480 [ 12.561433] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.561731] kthread+0x257/0x310 [ 12.561948] ret_from_fork+0x41/0x80 [ 12.562170] ret_from_fork_asm+0x1a/0x30 [ 12.562344] [ 12.562446] The buggy address belongs to the object at ffff88810261ce00 [ 12.562446] which belongs to the cache kmalloc-128 of size 128 [ 12.562998] The buggy address is located 0 bytes inside of [ 12.562998] freed 128-byte region [ffff88810261ce00, ffff88810261ce80) [ 12.563785] [ 12.563940] The buggy address belongs to the physical page: [ 12.564317] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10261c [ 12.564832] flags: 0x200000000000000(node=0|zone=2) [ 12.565163] page_type: f5(slab) [ 12.565395] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 12.565724] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 12.566135] page dumped because: kasan: bad access detected [ 12.566472] [ 12.566599] Memory state around the buggy address: [ 12.566906] ffff88810261cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 12.567315] ffff88810261cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.567562] >ffff88810261ce00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.567797] ^ [ 12.567947] ffff88810261ce80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.568208] ffff88810261cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.568436] ================================================================== [ 12.595859] ================================================================== [ 12.596393] BUG: KASAN: slab-use-after-free in ksize_uaf+0x5e6/0x6c0 [ 12.597100] Read of size 1 at addr ffff88810261ce78 by task kunit_try_catch/201 [ 12.597364] [ 12.597525] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.597601] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.597624] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.597671] Call Trace: [ 12.597699] <TASK> [ 12.597728] dump_stack_lvl+0x73/0xb0 [ 12.597785] print_report+0xd1/0x640 [ 12.597829] ? __virt_addr_valid+0x1db/0x2d0 [ 12.597876] ? ksize_uaf+0x5e6/0x6c0 [ 12.597925] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.597972] ? ksize_uaf+0x5e6/0x6c0 [ 12.598013] kasan_report+0x140/0x180 [ 12.598093] ? ksize_uaf+0x5e6/0x6c0 [ 12.598147] __asan_report_load1_noabort+0x18/0x20 [ 12.598195] ksize_uaf+0x5e6/0x6c0 [ 12.598235] ? __pfx_ksize_uaf+0x10/0x10 [ 12.598278] ? __schedule+0xc49/0x27a0 [ 12.598323] ? __pfx_read_tsc+0x10/0x10 [ 12.598364] ? ktime_get_ts64+0x84/0x230 [ 12.598422] kunit_try_run_case+0x1a6/0x480 [ 12.598469] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.598512] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.598555] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.598601] ? __kthread_parkme+0x82/0x160 [ 12.598642] ? preempt_count_sub+0x50/0x80 [ 12.598702] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.598746] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.598798] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.598840] kthread+0x257/0x310 [ 12.598870] ? __pfx_kthread+0x10/0x10 [ 12.598904] ret_from_fork+0x41/0x80 [ 12.598938] ? __pfx_kthread+0x10/0x10 [ 12.598968] ret_from_fork_asm+0x1a/0x30 [ 12.599012] </TASK> [ 12.599031] [ 12.606787] Allocated by task 201: [ 12.607024] kasan_save_stack+0x45/0x70 [ 12.607257] kasan_save_track+0x18/0x40 [ 12.607518] kasan_save_alloc_info+0x3b/0x50 [ 12.607837] __kasan_kmalloc+0xb7/0xc0 [ 12.608036] __kmalloc_cache_noprof+0x168/0x350 [ 12.608286] ksize_uaf+0xab/0x6c0 [ 12.608481] kunit_try_run_case+0x1a6/0x480 [ 12.608729] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.608930] kthread+0x257/0x310 [ 12.609116] ret_from_fork+0x41/0x80 [ 12.609281] ret_from_fork_asm+0x1a/0x30 [ 12.609448] [ 12.609546] Freed by task 201: [ 12.609689] kasan_save_stack+0x45/0x70 [ 12.609976] kasan_save_track+0x18/0x40 [ 12.610345] kasan_save_free_info+0x3f/0x60 [ 12.610678] __kasan_slab_free+0x56/0x70 [ 12.610990] kfree+0x123/0x3d0 [ 12.611270] ksize_uaf+0x12d/0x6c0 [ 12.611512] kunit_try_run_case+0x1a6/0x480 [ 12.611824] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.612217] kthread+0x257/0x310 [ 12.612476] ret_from_fork+0x41/0x80 [ 12.612735] ret_from_fork_asm+0x1a/0x30 [ 12.613011] [ 12.613187] The buggy address belongs to the object at ffff88810261ce00 [ 12.613187] which belongs to the cache kmalloc-128 of size 128 [ 12.613615] The buggy address is located 120 bytes inside of [ 12.613615] freed 128-byte region [ffff88810261ce00, ffff88810261ce80) [ 12.613994] [ 12.614170] The buggy address belongs to the physical page: [ 12.614512] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10261c [ 12.614985] flags: 0x200000000000000(node=0|zone=2) [ 12.615354] page_type: f5(slab) [ 12.615620] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 12.616019] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 12.616291] page dumped because: kasan: bad access detected [ 12.616478] [ 12.616576] Memory state around the buggy address: [ 12.616763] ffff88810261cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 12.617001] ffff88810261cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.617259] >ffff88810261ce00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.617487] ^ [ 12.617919] ffff88810261ce80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.618423] ffff88810261cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.618912] ================================================================== [ 12.569146] ================================================================== [ 12.569681] BUG: KASAN: slab-use-after-free in ksize_uaf+0x600/0x6c0 [ 12.570117] Read of size 1 at addr ffff88810261ce00 by task kunit_try_catch/201 [ 12.570594] [ 12.571184] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.571277] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.571301] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.571337] Call Trace: [ 12.571365] <TASK> [ 12.571394] dump_stack_lvl+0x73/0xb0 [ 12.571451] print_report+0xd1/0x640 [ 12.571497] ? __virt_addr_valid+0x1db/0x2d0 [ 12.571544] ? ksize_uaf+0x600/0x6c0 [ 12.571580] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.571622] ? ksize_uaf+0x600/0x6c0 [ 12.571670] kasan_report+0x140/0x180 [ 12.571711] ? ksize_uaf+0x600/0x6c0 [ 12.571751] __asan_report_load1_noabort+0x18/0x20 [ 12.571785] ksize_uaf+0x600/0x6c0 [ 12.571812] ? __pfx_ksize_uaf+0x10/0x10 [ 12.571845] ? __schedule+0xc49/0x27a0 [ 12.571884] ? __pfx_read_tsc+0x10/0x10 [ 12.571919] ? ktime_get_ts64+0x84/0x230 [ 12.571968] kunit_try_run_case+0x1a6/0x480 [ 12.572003] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.572037] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.572110] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.572150] ? __kthread_parkme+0x82/0x160 [ 12.572184] ? preempt_count_sub+0x50/0x80 [ 12.572227] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.572265] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.572308] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.572349] kthread+0x257/0x310 [ 12.572379] ? __pfx_kthread+0x10/0x10 [ 12.572412] ret_from_fork+0x41/0x80 [ 12.572446] ? __pfx_kthread+0x10/0x10 [ 12.572478] ret_from_fork_asm+0x1a/0x30 [ 12.572530] </TASK> [ 12.572552] [ 12.579342] Allocated by task 201: [ 12.579513] kasan_save_stack+0x45/0x70 [ 12.579713] kasan_save_track+0x18/0x40 [ 12.579972] kasan_save_alloc_info+0x3b/0x50 [ 12.580281] __kasan_kmalloc+0xb7/0xc0 [ 12.580537] __kmalloc_cache_noprof+0x168/0x350 [ 12.580845] ksize_uaf+0xab/0x6c0 [ 12.581131] kunit_try_run_case+0x1a6/0x480 [ 12.581445] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.581820] kthread+0x257/0x310 [ 12.582101] ret_from_fork+0x41/0x80 [ 12.582388] ret_from_fork_asm+0x1a/0x30 [ 12.582678] [ 12.582825] Freed by task 201: [ 12.583081] kasan_save_stack+0x45/0x70 [ 12.583387] kasan_save_track+0x18/0x40 [ 12.583665] kasan_save_free_info+0x3f/0x60 [ 12.583947] __kasan_slab_free+0x56/0x70 [ 12.584267] kfree+0x123/0x3d0 [ 12.584465] ksize_uaf+0x12d/0x6c0 [ 12.584599] kunit_try_run_case+0x1a6/0x480 [ 12.584909] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.585251] kthread+0x257/0x310 [ 12.585402] ret_from_fork+0x41/0x80 [ 12.585651] ret_from_fork_asm+0x1a/0x30 [ 12.585935] [ 12.586119] The buggy address belongs to the object at ffff88810261ce00 [ 12.586119] which belongs to the cache kmalloc-128 of size 128 [ 12.586607] The buggy address is located 0 bytes inside of [ 12.586607] freed 128-byte region [ffff88810261ce00, ffff88810261ce80) [ 12.587208] [ 12.587356] The buggy address belongs to the physical page: [ 12.587600] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10261c [ 12.588084] flags: 0x200000000000000(node=0|zone=2) [ 12.588326] page_type: f5(slab) [ 12.588541] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000 [ 12.588810] raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 [ 12.589075] page dumped because: kasan: bad access detected [ 12.589265] [ 12.589363] Memory state around the buggy address: [ 12.589543] ffff88810261cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 12.589907] ffff88810261cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.590430] >ffff88810261ce00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.590925] ^ [ 12.591204] ffff88810261ce80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.591685] ffff88810261cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.592178] ==================================================================