Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.459936] ================================================================== [ 22.461155] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3a4/0x488 [ 22.462152] Read of size 1 at addr fff00000c41fc000 by task kunit_try_catch/201 [ 22.462998] [ 22.463607] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 22.463792] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.463873] Hardware name: linux,dummy-virt (DT) [ 22.463988] Call trace: [ 22.464056] dump_backtrace+0x9c/0x128 [ 22.464180] show_stack+0x20/0x38 [ 22.464231] dump_stack_lvl+0x8c/0xd0 [ 22.464287] print_report+0x118/0x5f0 [ 22.464335] kasan_report+0xdc/0x128 [ 22.464380] __asan_report_load1_noabort+0x20/0x30 [ 22.464429] kmem_cache_rcu_uaf+0x3a4/0x488 [ 22.464479] kunit_try_run_case+0x170/0x3f0 [ 22.464531] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.464586] kthread+0x24c/0x2d0 [ 22.464633] ret_from_fork+0x10/0x20 [ 22.464682] [ 22.470477] Allocated by task 201: [ 22.470868] kasan_save_stack+0x3c/0x68 [ 22.471490] kasan_save_track+0x20/0x40 [ 22.472156] kasan_save_alloc_info+0x40/0x58 [ 22.472830] __kasan_slab_alloc+0xa8/0xb0 [ 22.473448] kmem_cache_alloc_noprof+0xf8/0x300 [ 22.474132] kmem_cache_rcu_uaf+0x130/0x488 [ 22.474676] kunit_try_run_case+0x170/0x3f0 [ 22.475345] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.476011] kthread+0x24c/0x2d0 [ 22.476487] ret_from_fork+0x10/0x20 [ 22.477084] [ 22.477426] Freed by task 0: [ 22.477845] kasan_save_stack+0x3c/0x68 [ 22.478299] kasan_save_track+0x20/0x40 [ 22.478714] kasan_save_free_info+0x4c/0x78 [ 22.479350] __kasan_slab_free+0x6c/0x98 [ 22.480015] slab_free_after_rcu_debug+0xd0/0x2d0 [ 22.480791] rcu_core+0xa54/0x1df8 [ 22.481314] rcu_core_si+0x18/0x30 [ 22.481940] handle_softirqs+0x36c/0xb18 [ 22.482561] __do_softirq+0x1c/0x28 [ 22.483146] [ 22.483461] Last potentially related work creation: [ 22.484090] kasan_save_stack+0x3c/0x68 [ 22.484609] __kasan_record_aux_stack+0xbc/0xe8 [ 22.485246] kasan_record_aux_stack_noalloc+0x14/0x20 [ 22.485866] kmem_cache_free+0x28c/0x460 [ 22.486413] kmem_cache_rcu_uaf+0x170/0x488 [ 22.487021] kunit_try_run_case+0x170/0x3f0 [ 22.487568] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.488228] kthread+0x24c/0x2d0 [ 22.488712] ret_from_fork+0x10/0x20 [ 22.489242] [ 22.489599] The buggy address belongs to the object at fff00000c41fc000 [ 22.489599] which belongs to the cache test_cache of size 200 [ 22.490685] The buggy address is located 0 bytes inside of [ 22.490685] freed 200-byte region [fff00000c41fc000, fff00000c41fc0c8) [ 22.491869] [ 22.492208] The buggy address belongs to the physical page: [ 22.493056] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1041fc [ 22.493940] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.494781] page_type: f5(slab) [ 22.495331] raw: 0bfffe0000000000 fff00000c4182280 dead000000000122 0000000000000000 [ 22.496254] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 22.497088] page dumped because: kasan: bad access detected [ 22.497725] [ 22.498069] Memory state around the buggy address: [ 22.498626] fff00000c41fbf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.499467] fff00000c41fbf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.500208] >fff00000c41fc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.500906] ^ [ 22.501387] fff00000c41fc080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 22.502123] fff00000c41fc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.502867] ==================================================================
[ 19.001838] ================================================================== [ 19.002905] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 19.003732] Read of size 1 at addr ffff888102930000 by task kunit_try_catch/218 [ 19.004592] [ 19.004867] CPU: 0 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 19.004980] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.005013] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.005068] Call Trace: [ 19.005108] <TASK> [ 19.005159] dump_stack_lvl+0x73/0xb0 [ 19.005270] print_report+0xd1/0x640 [ 19.005351] ? __virt_addr_valid+0x1db/0x2d0 [ 19.005447] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 19.005540] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.005615] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 19.005681] kasan_report+0x140/0x180 [ 19.005757] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 19.005840] __asan_report_load1_noabort+0x18/0x20 [ 19.005914] kmem_cache_rcu_uaf+0x3e5/0x510 [ 19.005982] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 19.006046] ? __kasan_check_write+0x18/0x20 [ 19.006079] ? queued_spin_lock_slowpath+0x117/0xb40 [ 19.006113] ? irqentry_exit+0x2a/0x60 [ 19.006144] ? trace_hardirqs_on+0x37/0xe0 [ 19.006179] ? __pfx_read_tsc+0x10/0x10 [ 19.006207] ? ktime_get_ts64+0x84/0x230 [ 19.006274] kunit_try_run_case+0x1a6/0x480 [ 19.006309] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.006340] ? queued_spin_lock_slowpath+0x117/0xb40 [ 19.006369] ? __kthread_parkme+0x82/0x160 [ 19.006397] ? preempt_count_sub+0x50/0x80 [ 19.006428] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.006456] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.006493] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.006529] kthread+0x257/0x310 [ 19.006556] ? __pfx_kthread+0x10/0x10 [ 19.006582] ret_from_fork+0x41/0x80 [ 19.006610] ? __pfx_kthread+0x10/0x10 [ 19.006636] ret_from_fork_asm+0x1a/0x30 [ 19.006678] </TASK> [ 19.006693] [ 19.020748] Allocated by task 218: [ 19.021149] kasan_save_stack+0x45/0x70 [ 19.021614] kasan_save_track+0x18/0x40 [ 19.021996] kasan_save_alloc_info+0x3b/0x50 [ 19.022388] __kasan_slab_alloc+0x91/0xa0 [ 19.022799] kmem_cache_alloc_noprof+0x107/0x350 [ 19.023331] kmem_cache_rcu_uaf+0x156/0x510 [ 19.023753] kunit_try_run_case+0x1a6/0x480 [ 19.024232] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.024768] kthread+0x257/0x310 [ 19.025147] ret_from_fork+0x41/0x80 [ 19.025504] ret_from_fork_asm+0x1a/0x30 [ 19.025924] [ 19.026146] Freed by task 0: [ 19.026476] kasan_save_stack+0x45/0x70 [ 19.026786] kasan_save_track+0x18/0x40 [ 19.027140] kasan_save_free_info+0x3f/0x60 [ 19.027600] __kasan_slab_free+0x56/0x70 [ 19.028086] slab_free_after_rcu_debug+0xe4/0x2f0 [ 19.028577] rcu_core+0x683/0x1c80 [ 19.029023] rcu_core_si+0x12/0x20 [ 19.029393] handle_softirqs+0x209/0x730 [ 19.029776] irq_exit_rcu+0x9c/0xd0 [ 19.030161] sysvec_apic_timer_interrupt+0x81/0x90 [ 19.030526] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 19.031059] [ 19.031314] Last potentially related work creation: [ 19.031749] kasan_save_stack+0x45/0x70 [ 19.032192] __kasan_record_aux_stack+0xae/0xc0 [ 19.032664] kasan_record_aux_stack_noalloc+0xf/0x20 [ 19.033147] kmem_cache_free+0x276/0x400 [ 19.033576] kmem_cache_rcu_uaf+0x195/0x510 [ 19.034016] kunit_try_run_case+0x1a6/0x480 [ 19.034447] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.034978] kthread+0x257/0x310 [ 19.035315] ret_from_fork+0x41/0x80 [ 19.035706] ret_from_fork_asm+0x1a/0x30 [ 19.036130] [ 19.036360] The buggy address belongs to the object at ffff888102930000 [ 19.036360] which belongs to the cache test_cache of size 200 [ 19.037094] The buggy address is located 0 bytes inside of [ 19.037094] freed 200-byte region [ffff888102930000, ffff8881029300c8) [ 19.040666] [ 19.041310] The buggy address belongs to the physical page: [ 19.041668] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102930 [ 19.042479] flags: 0x200000000000000(node=0|zone=2) [ 19.043003] page_type: f5(slab) [ 19.043432] raw: 0200000000000000 ffff88810292e000 dead000000000122 0000000000000000 [ 19.044160] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 19.044866] page dumped because: kasan: bad access detected [ 19.045391] [ 19.045595] Memory state around the buggy address: [ 19.046156] ffff88810292ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.046837] ffff88810292ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.047416] >ffff888102930000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.047968] ^ [ 19.048559] ffff888102930080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.049342] ffff888102930100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.050052] ==================================================================