Date
Dec. 6, 2024, 3:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.535556] ================================================================== [ 32.536935] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 32.537944] Read of size 1 at addr fff00000c69b9000 by task kunit_try_catch/202 [ 32.539148] [ 32.539566] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 32.540557] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.541065] Hardware name: linux,dummy-virt (DT) [ 32.541667] Call trace: [ 32.542067] show_stack+0x20/0x38 (C) [ 32.542933] dump_stack_lvl+0x8c/0xd0 [ 32.543591] print_report+0x118/0x5e0 [ 32.544154] kasan_report+0xc8/0x118 [ 32.544870] __asan_report_load1_noabort+0x20/0x30 [ 32.545618] kmem_cache_rcu_uaf+0x390/0x468 [ 32.546479] kunit_try_run_case+0x14c/0x3d0 [ 32.547107] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.547764] kthread+0x24c/0x2d0 [ 32.548355] ret_from_fork+0x10/0x20 [ 32.548936] [ 32.549283] Allocated by task 202: [ 32.549859] kasan_save_stack+0x3c/0x68 [ 32.550675] kasan_save_track+0x20/0x40 [ 32.551302] kasan_save_alloc_info+0x40/0x58 [ 32.551890] __kasan_slab_alloc+0xa8/0xb0 [ 32.552584] kmem_cache_alloc_noprof+0x108/0x398 [ 32.553279] kmem_cache_rcu_uaf+0x12c/0x468 [ 32.553963] kunit_try_run_case+0x14c/0x3d0 [ 32.554856] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.555558] kthread+0x24c/0x2d0 [ 32.556143] ret_from_fork+0x10/0x20 [ 32.556732] [ 32.557072] Freed by task 0: [ 32.557462] kasan_save_stack+0x3c/0x68 [ 32.558111] kasan_save_track+0x20/0x40 [ 32.559618] kasan_save_free_info+0x4c/0x78 [ 32.560388] __kasan_slab_free+0x6c/0x98 [ 32.561136] slab_free_after_rcu_debug+0xd4/0x2f8 [ 32.561745] rcu_core+0x9f4/0x1e20 [ 32.562232] rcu_core_si+0x18/0x30 [ 32.562829] handle_softirqs+0x374/0xb20 [ 32.563349] __do_softirq+0x1c/0x28 [ 32.564245] [ 32.564626] Last potentially related work creation: [ 32.565203] kasan_save_stack+0x3c/0x68 [ 32.565876] kasan_record_aux_stack+0xb4/0xc8 [ 32.566806] kmem_cache_free+0x28c/0x470 [ 32.567385] kmem_cache_rcu_uaf+0x16c/0x468 [ 32.567968] kunit_try_run_case+0x14c/0x3d0 [ 32.568656] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.569370] kthread+0x24c/0x2d0 [ 32.569920] ret_from_fork+0x10/0x20 [ 32.570791] [ 32.571128] The buggy address belongs to the object at fff00000c69b9000 [ 32.571128] which belongs to the cache test_cache of size 200 [ 32.572343] The buggy address is located 0 bytes inside of [ 32.572343] freed 200-byte region [fff00000c69b9000, fff00000c69b90c8) [ 32.573552] [ 32.573925] The buggy address belongs to the physical page: [ 32.574920] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1069b9 [ 32.575745] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.576638] page_type: f5(slab) [ 32.577193] raw: 0bfffe0000000000 fff00000c5b4c280 dead000000000122 0000000000000000 [ 32.578022] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 32.579250] page dumped because: kasan: bad access detected [ 32.579809] [ 32.580178] Memory state around the buggy address: [ 32.580816] fff00000c69b8f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.581592] fff00000c69b8f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.582457] >fff00000c69b9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.583530] ^ [ 32.583990] fff00000c69b9080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.584923] fff00000c69b9100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.585871] ==================================================================
[ 25.259910] ================================================================== [ 25.261523] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 25.262210] Read of size 1 at addr ffff888102929000 by task kunit_try_catch/221 [ 25.262781] [ 25.263049] CPU: 0 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 25.264226] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.264530] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.265524] Call Trace: [ 25.265825] <TASK> [ 25.266055] dump_stack_lvl+0x73/0xb0 [ 25.266684] print_report+0xd1/0x640 [ 25.267197] ? __virt_addr_valid+0x1db/0x2d0 [ 25.267758] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.268409] kasan_report+0x102/0x140 [ 25.268859] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 25.269427] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 25.269769] __asan_report_load1_noabort+0x18/0x20 [ 25.270379] kmem_cache_rcu_uaf+0x3e5/0x510 [ 25.270955] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 25.271474] ? finish_task_switch.isra.0+0x153/0x700 [ 25.272236] ? __switch_to+0x5d9/0xf60 [ 25.272745] ? __pfx_read_tsc+0x10/0x10 [ 25.273243] ? ktime_get_ts64+0x86/0x230 [ 25.273571] kunit_try_run_case+0x1b3/0x490 [ 25.274232] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.274778] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 25.275337] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.275818] ? __kthread_parkme+0x82/0x160 [ 25.276416] ? preempt_count_sub+0x50/0x80 [ 25.276829] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.277415] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.278072] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.278681] kthread+0x257/0x310 [ 25.278974] ? __pfx_kthread+0x10/0x10 [ 25.279495] ret_from_fork+0x41/0x80 [ 25.279994] ? __pfx_kthread+0x10/0x10 [ 25.280522] ret_from_fork_asm+0x1a/0x30 [ 25.281131] </TASK> [ 25.281482] [ 25.281730] Allocated by task 221: [ 25.282109] kasan_save_stack+0x3d/0x60 [ 25.282617] kasan_save_track+0x18/0x40 [ 25.283188] kasan_save_alloc_info+0x3b/0x50 [ 25.283649] __kasan_slab_alloc+0x91/0xa0 [ 25.284048] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 25.284734] kmem_cache_rcu_uaf+0x156/0x510 [ 25.285239] kunit_try_run_case+0x1b3/0x490 [ 25.285669] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.286313] kthread+0x257/0x310 [ 25.286715] ret_from_fork+0x41/0x80 [ 25.287033] ret_from_fork_asm+0x1a/0x30 [ 25.287634] [ 25.287863] Freed by task 0: [ 25.288147] kasan_save_stack+0x3d/0x60 [ 25.288650] kasan_save_track+0x18/0x40 [ 25.289029] kasan_save_free_info+0x3f/0x60 [ 25.289474] __kasan_slab_free+0x56/0x70 [ 25.290061] slab_free_after_rcu_debug+0xe4/0x310 [ 25.290418] rcu_core+0x680/0x1d70 [ 25.290693] rcu_core_si+0x12/0x20 [ 25.290991] handle_softirqs+0x209/0x720 [ 25.291594] __irq_exit_rcu+0xc9/0x110 [ 25.292158] irq_exit_rcu+0x12/0x20 [ 25.292575] sysvec_apic_timer_interrupt+0x81/0x90 [ 25.293139] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 25.293564] [ 25.293845] Last potentially related work creation: [ 25.294272] kasan_save_stack+0x3d/0x60 [ 25.294807] kasan_record_aux_stack+0xb2/0xc0 [ 25.295204] kmem_cache_free+0x284/0x420 [ 25.295729] kmem_cache_rcu_uaf+0x195/0x510 [ 25.296202] kunit_try_run_case+0x1b3/0x490 [ 25.296495] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.296955] kthread+0x257/0x310 [ 25.297505] ret_from_fork+0x41/0x80 [ 25.298052] ret_from_fork_asm+0x1a/0x30 [ 25.298579] [ 25.298840] The buggy address belongs to the object at ffff888102929000 [ 25.298840] which belongs to the cache test_cache of size 200 [ 25.299870] The buggy address is located 0 bytes inside of [ 25.299870] freed 200-byte region [ffff888102929000, ffff8881029290c8) [ 25.300753] [ 25.301128] The buggy address belongs to the physical page: [ 25.301725] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102929 [ 25.302608] flags: 0x200000000000000(node=0|zone=2) [ 25.303068] page_type: f5(slab) [ 25.303569] raw: 0200000000000000 ffff88815a89af00 dead000000000122 0000000000000000 [ 25.304315] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 25.304957] page dumped because: kasan: bad access detected [ 25.305636] [ 25.305889] Memory state around the buggy address: [ 25.306384] ffff888102928f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.306880] ffff888102928f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.307686] >ffff888102929000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.308589] ^ [ 25.308884] ffff888102929080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.309607] ffff888102929100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.310333] ==================================================================