Date
Nov. 20, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 38.058115] ================================================================== [ 38.059118] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 38.059913] Read of size 1 at addr fff00000c65c1000 by task kunit_try_catch/202 [ 38.060754] [ 38.061131] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 38.062654] Tainted: [B]=BAD_PAGE, [N]=TEST [ 38.063075] Hardware name: linux,dummy-virt (DT) [ 38.063657] Call trace: [ 38.064080] show_stack+0x20/0x38 (C) [ 38.064703] dump_stack_lvl+0x8c/0xd0 [ 38.065292] print_report+0x118/0x5e0 [ 38.066312] kasan_report+0xc8/0x118 [ 38.066884] __asan_report_load1_noabort+0x20/0x30 [ 38.067486] kmem_cache_rcu_uaf+0x390/0x468 [ 38.068101] kunit_try_run_case+0x14c/0x3d0 [ 38.068633] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 38.069554] kthread+0x24c/0x2d0 [ 38.070137] ret_from_fork+0x10/0x20 [ 38.070667] [ 38.070977] Allocated by task 202: [ 38.071482] kasan_save_stack+0x3c/0x68 [ 38.072050] kasan_save_track+0x20/0x40 [ 38.072631] kasan_save_alloc_info+0x40/0x58 [ 38.073226] __kasan_slab_alloc+0xa8/0xb0 [ 38.074100] kmem_cache_alloc_noprof+0x108/0x3a0 [ 38.075037] kmem_cache_rcu_uaf+0x12c/0x468 [ 38.075622] kunit_try_run_case+0x14c/0x3d0 [ 38.076194] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 38.076899] kthread+0x24c/0x2d0 [ 38.077782] ret_from_fork+0x10/0x20 [ 38.078515] [ 38.078866] Freed by task 0: [ 38.079285] kasan_save_stack+0x3c/0x68 [ 38.079884] kasan_save_track+0x20/0x40 [ 38.080566] kasan_save_free_info+0x4c/0x78 [ 38.081268] __kasan_slab_free+0x6c/0x98 [ 38.081920] slab_free_after_rcu_debug+0xd4/0x2f8 [ 38.082570] rcu_core+0xa54/0x1df8 [ 38.083560] rcu_core_si+0x18/0x30 [ 38.083957] handle_softirqs+0x374/0xb20 [ 38.084482] __do_softirq+0x1c/0x28 [ 38.085618] [ 38.085907] Last potentially related work creation: [ 38.086768] kasan_save_stack+0x3c/0x68 [ 38.087274] __kasan_record_aux_stack+0xbc/0xe8 [ 38.087932] kasan_record_aux_stack_noalloc+0x14/0x20 [ 38.088523] kmem_cache_free+0x28c/0x470 [ 38.089104] kmem_cache_rcu_uaf+0x16c/0x468 [ 38.089685] kunit_try_run_case+0x14c/0x3d0 [ 38.090301] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 38.091034] kthread+0x24c/0x2d0 [ 38.091848] ret_from_fork+0x10/0x20 [ 38.092432] [ 38.092784] The buggy address belongs to the object at fff00000c65c1000 [ 38.092784] which belongs to the cache test_cache of size 200 [ 38.094373] The buggy address is located 0 bytes inside of [ 38.094373] freed 200-byte region [fff00000c65c1000, fff00000c65c10c8) [ 38.095647] [ 38.095972] The buggy address belongs to the physical page: [ 38.096592] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065c1 [ 38.097908] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 38.098775] page_type: f5(slab) [ 38.099248] raw: 0bfffe0000000000 fff00000c652d140 dead000000000122 0000000000000000 [ 38.100010] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 38.100879] page dumped because: kasan: bad access detected [ 38.102010] [ 38.102618] Memory state around the buggy address: [ 38.103052] fff00000c65c0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.103978] fff00000c65c0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.104747] >fff00000c65c1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.106207] ^ [ 38.106804] fff00000c65c1080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.107161] fff00000c65c1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.107576] ==================================================================
[ 29.585441] ================================================================== [ 29.587365] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.588135] Read of size 1 at addr ffff8881029ef000 by task kunit_try_catch/220 [ 29.589048] [ 29.589348] CPU: 1 UID: 0 PID: 220 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 29.591291] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.591564] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.592865] Call Trace: [ 29.593266] <TASK> [ 29.593647] dump_stack_lvl+0x73/0xb0 [ 29.594421] print_report+0xd1/0x640 [ 29.594863] ? __virt_addr_valid+0x1db/0x2d0 [ 29.595311] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.595859] kasan_report+0x102/0x140 [ 29.596247] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.596761] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.597121] __asan_report_load1_noabort+0x18/0x20 [ 29.597532] kmem_cache_rcu_uaf+0x3e5/0x510 [ 29.598139] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 29.598462] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 29.599263] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 29.599982] kunit_try_run_case+0x1b3/0x490 [ 29.600542] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.600929] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 29.601980] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.602680] ? __kthread_parkme+0x82/0x160 [ 29.603153] ? preempt_count_sub+0x50/0x80 [ 29.603515] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.604245] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.605191] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.605749] kthread+0x257/0x310 [ 29.606194] ? __pfx_kthread+0x10/0x10 [ 29.606563] ret_from_fork+0x41/0x80 [ 29.607167] ? __pfx_kthread+0x10/0x10 [ 29.607522] ret_from_fork_asm+0x1a/0x30 [ 29.608190] </TASK> [ 29.609000] [ 29.609149] Allocated by task 220: [ 29.610109] kasan_save_stack+0x3d/0x60 [ 29.610647] kasan_save_track+0x18/0x40 [ 29.611051] kasan_save_alloc_info+0x3b/0x50 [ 29.611631] __kasan_slab_alloc+0x91/0xa0 [ 29.612802] kmem_cache_alloc_noprof+0x11e/0x3f0 [ 29.613489] kmem_cache_rcu_uaf+0x156/0x510 [ 29.614530] kunit_try_run_case+0x1b3/0x490 [ 29.615162] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.616301] kthread+0x257/0x310 [ 29.616567] ret_from_fork+0x41/0x80 [ 29.617075] ret_from_fork_asm+0x1a/0x30 [ 29.617505] [ 29.618295] Freed by task 0: [ 29.618705] kasan_save_stack+0x3d/0x60 [ 29.619810] kasan_save_track+0x18/0x40 [ 29.620215] kasan_save_free_info+0x3f/0x60 [ 29.621168] __kasan_slab_free+0x56/0x70 [ 29.621452] slab_free_after_rcu_debug+0xe4/0x310 [ 29.621980] rcu_core+0x680/0x1d70 [ 29.622338] rcu_core_si+0x12/0x20 [ 29.623315] handle_softirqs+0x209/0x720 [ 29.624192] __irq_exit_rcu+0xc9/0x110 [ 29.624948] irq_exit_rcu+0x12/0x20 [ 29.625141] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.625889] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.627056] [ 29.627428] Last potentially related work creation: [ 29.627865] kasan_save_stack+0x3d/0x60 [ 29.628987] __kasan_record_aux_stack+0xae/0xc0 [ 29.630078] kasan_record_aux_stack_noalloc+0xf/0x20 [ 29.630841] kmem_cache_free+0x276/0x420 [ 29.631032] kmem_cache_rcu_uaf+0x195/0x510 [ 29.631222] kunit_try_run_case+0x1b3/0x490 [ 29.631875] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.632490] kthread+0x257/0x310 [ 29.632770] ret_from_fork+0x41/0x80 [ 29.633247] ret_from_fork_asm+0x1a/0x30 [ 29.633824] [ 29.633999] The buggy address belongs to the object at ffff8881029ef000 [ 29.633999] which belongs to the cache test_cache of size 200 [ 29.635522] The buggy address is located 0 bytes inside of [ 29.635522] freed 200-byte region [ffff8881029ef000, ffff8881029ef0c8) [ 29.636414] [ 29.636738] The buggy address belongs to the physical page: [ 29.637338] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029ef [ 29.638112] flags: 0x200000000000000(node=0|zone=2) [ 29.638843] page_type: f5(slab) [ 29.639136] raw: 0200000000000000 ffff888101ebc8c0 dead000000000122 0000000000000000 [ 29.640751] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 29.641955] page dumped because: kasan: bad access detected [ 29.642819] [ 29.643348] Memory state around the buggy address: [ 29.644298] ffff8881029eef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.645013] ffff8881029eef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.645946] >ffff8881029ef000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.647111] ^ [ 29.647520] ffff8881029ef080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.648572] ffff8881029ef100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.649352] ==================================================================