Date
Nov. 27, 2024, 3:37 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 49.262595] ================================================================== [ 49.263822] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x390/0x468 [ 49.264484] Read of size 1 at addr fff00000c6176000 by task kunit_try_catch/202 [ 49.265396] [ 49.265769] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241127 #1 [ 49.266964] Tainted: [B]=BAD_PAGE, [N]=TEST [ 49.267582] Hardware name: linux,dummy-virt (DT) [ 49.268197] Call trace: [ 49.268576] show_stack+0x20/0x38 (C) [ 49.269237] dump_stack_lvl+0x8c/0xd0 [ 49.269730] print_report+0x118/0x5e0 [ 49.270388] kasan_report+0xc8/0x118 [ 49.270923] __asan_report_load1_noabort+0x20/0x30 [ 49.271656] kmem_cache_rcu_uaf+0x390/0x468 [ 49.272308] kunit_try_run_case+0x14c/0x3d0 [ 49.272861] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 49.273707] kthread+0x24c/0x2d0 [ 49.274325] ret_from_fork+0x10/0x20 [ 49.274925] [ 49.275231] Allocated by task 202: [ 49.275836] kasan_save_stack+0x3c/0x68 [ 49.276369] kasan_save_track+0x20/0x40 [ 49.276955] kasan_save_alloc_info+0x40/0x58 [ 49.277588] __kasan_slab_alloc+0xa8/0xb0 [ 49.278141] kmem_cache_alloc_noprof+0x108/0x398 [ 49.278786] kmem_cache_rcu_uaf+0x12c/0x468 [ 49.279362] kunit_try_run_case+0x14c/0x3d0 [ 49.279950] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 49.280720] kthread+0x24c/0x2d0 [ 49.281203] ret_from_fork+0x10/0x20 [ 49.281837] [ 49.282164] Freed by task 0: [ 49.282650] kasan_save_stack+0x3c/0x68 [ 49.283315] kasan_save_track+0x20/0x40 [ 49.283836] kasan_save_free_info+0x4c/0x78 [ 49.284367] __kasan_slab_free+0x6c/0x98 [ 49.284993] slab_free_after_rcu_debug+0xd4/0x2f8 [ 49.285756] rcu_core+0x9f4/0x1e20 [ 49.286360] rcu_core_si+0x18/0x30 [ 49.286900] handle_softirqs+0x374/0xb20 [ 49.287451] __do_softirq+0x1c/0x28 [ 49.287987] [ 49.288331] Last potentially related work creation: [ 49.289027] kasan_save_stack+0x3c/0x68 [ 49.289575] __kasan_record_aux_stack+0xbc/0xe8 [ 49.290426] kasan_record_aux_stack_noalloc+0x14/0x20 [ 49.290968] kmem_cache_free+0x28c/0x470 [ 49.291696] kmem_cache_rcu_uaf+0x16c/0x468 [ 49.292272] kunit_try_run_case+0x14c/0x3d0 [ 49.292883] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 49.293532] kthread+0x24c/0x2d0 [ 49.294190] ret_from_fork+0x10/0x20 [ 49.294719] [ 49.295076] The buggy address belongs to the object at fff00000c6176000 [ 49.295076] which belongs to the cache test_cache of size 200 [ 49.296480] The buggy address is located 0 bytes inside of [ 49.296480] freed 200-byte region [fff00000c6176000, fff00000c61760c8) [ 49.297772] [ 49.298106] The buggy address belongs to the physical page: [ 49.298896] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106176 [ 49.299908] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 49.300728] page_type: f5(slab) [ 49.301255] raw: 0bfffe0000000000 fff00000c6181280 dead000000000122 0000000000000000 [ 49.302170] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 49.303055] page dumped because: kasan: bad access detected [ 49.303812] [ 49.304124] Memory state around the buggy address: [ 49.304701] fff00000c6175f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.305604] fff00000c6175f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.306452] >fff00000c6176000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.307249] ^ [ 49.307805] fff00000c6176080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 49.308631] fff00000c6176100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.309497] ==================================================================
[ 26.424625] ================================================================== [ 26.425760] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.426402] Read of size 1 at addr ffff888101aae000 by task kunit_try_catch/221 [ 26.427507] [ 26.427796] CPU: 1 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241127 #1 [ 26.428907] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.429366] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.430550] Call Trace: [ 26.430966] <TASK> [ 26.431820] dump_stack_lvl+0x73/0xb0 [ 26.432258] print_report+0xd1/0x640 [ 26.433261] ? __virt_addr_valid+0x1db/0x2d0 [ 26.433757] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.434555] kasan_report+0x102/0x140 [ 26.435046] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.435472] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.436167] __asan_report_load1_noabort+0x18/0x20 [ 26.436583] kmem_cache_rcu_uaf+0x3e5/0x510 [ 26.437208] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 26.438163] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 26.439092] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 26.439575] kunit_try_run_case+0x1b3/0x490 [ 26.440089] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.440680] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 26.441183] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.441718] ? __kthread_parkme+0x82/0x160 [ 26.442189] ? preempt_count_sub+0x50/0x80 [ 26.442801] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.443429] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.444110] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.444641] kthread+0x257/0x310 [ 26.445244] ? __pfx_kthread+0x10/0x10 [ 26.445642] ret_from_fork+0x41/0x80 [ 26.446203] ? __pfx_kthread+0x10/0x10 [ 26.446557] ret_from_fork_asm+0x1a/0x30 [ 26.447333] </TASK> [ 26.447595] [ 26.447809] Allocated by task 221: [ 26.448292] kasan_save_stack+0x3d/0x60 [ 26.448715] kasan_save_track+0x18/0x40 [ 26.449226] kasan_save_alloc_info+0x3b/0x50 [ 26.449698] __kasan_slab_alloc+0x91/0xa0 [ 26.450258] kmem_cache_alloc_noprof+0x11e/0x3e0 [ 26.450781] kmem_cache_rcu_uaf+0x156/0x510 [ 26.451496] kunit_try_run_case+0x1b3/0x490 [ 26.452200] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.452596] kthread+0x257/0x310 [ 26.452888] ret_from_fork+0x41/0x80 [ 26.453568] ret_from_fork_asm+0x1a/0x30 [ 26.454069] [ 26.454295] Freed by task 0: [ 26.454528] kasan_save_stack+0x3d/0x60 [ 26.455248] kasan_save_track+0x18/0x40 [ 26.455711] kasan_save_free_info+0x3f/0x60 [ 26.456361] __kasan_slab_free+0x56/0x70 [ 26.456652] slab_free_after_rcu_debug+0xe4/0x310 [ 26.457385] rcu_core+0x680/0x1d70 [ 26.457782] rcu_core_si+0x12/0x20 [ 26.458396] handle_softirqs+0x209/0x720 [ 26.458693] __irq_exit_rcu+0xc9/0x110 [ 26.459431] irq_exit_rcu+0x12/0x20 [ 26.459867] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.460293] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.460778] [ 26.460931] Last potentially related work creation: [ 26.461630] kasan_save_stack+0x3d/0x60 [ 26.462172] __kasan_record_aux_stack+0xae/0xc0 [ 26.462596] kasan_record_aux_stack_noalloc+0xf/0x20 [ 26.463482] kmem_cache_free+0x284/0x420 [ 26.463768] kmem_cache_rcu_uaf+0x195/0x510 [ 26.464431] kunit_try_run_case+0x1b3/0x490 [ 26.464742] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.465510] kthread+0x257/0x310 [ 26.465816] ret_from_fork+0x41/0x80 [ 26.466413] ret_from_fork_asm+0x1a/0x30 [ 26.466763] [ 26.467220] The buggy address belongs to the object at ffff888101aae000 [ 26.467220] which belongs to the cache test_cache of size 200 [ 26.468368] The buggy address is located 0 bytes inside of [ 26.468368] freed 200-byte region [ffff888101aae000, ffff888101aae0c8) [ 26.469556] [ 26.469773] The buggy address belongs to the physical page: [ 26.470473] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101aae [ 26.471377] flags: 0x200000000000000(node=0|zone=2) [ 26.471860] page_type: f5(slab) [ 26.472265] raw: 0200000000000000 ffff888101a54a00 dead000000000122 0000000000000000 [ 26.473025] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 26.473643] page dumped because: kasan: bad access detected [ 26.474366] [ 26.474551] Memory state around the buggy address: [ 26.475383] ffff888101aadf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.476131] ffff888101aadf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.476822] >ffff888101aae000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.478071] ^ [ 26.478548] ffff888101aae080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.479484] ffff888101aae100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.480108] ==================================================================