Date
Dec. 6, 2024, 3:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.079186] ================================================================== [ 32.080236] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 32.081141] Read of size 4 at addr fff00000c66cf640 by task swapper/0/0 [ 32.081874] [ 32.082413] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 32.083490] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.084631] Hardware name: linux,dummy-virt (DT) [ 32.085189] Call trace: [ 32.085737] show_stack+0x20/0x38 (C) [ 32.086718] dump_stack_lvl+0x8c/0xd0 [ 32.087303] print_report+0x118/0x5e0 [ 32.087926] kasan_report+0xc8/0x118 [ 32.088656] __asan_report_load4_noabort+0x20/0x30 [ 32.089250] rcu_uaf_reclaim+0x64/0x70 [ 32.089900] rcu_core+0x9f4/0x1e20 [ 32.090477] rcu_core_si+0x18/0x30 [ 32.091205] handle_softirqs+0x374/0xb20 [ 32.092309] __do_softirq+0x1c/0x28 [ 32.092863] ____do_softirq+0x18/0x30 [ 32.093646] call_on_irq_stack+0x24/0x58 [ 32.094706] do_softirq_own_stack+0x24/0x38 [ 32.095312] __irq_exit_rcu+0x1fc/0x318 [ 32.096054] irq_exit_rcu+0x1c/0x80 [ 32.096648] el1_interrupt+0x38/0x58 [ 32.097364] el1h_64_irq_handler+0x18/0x28 [ 32.098081] el1h_64_irq+0x6c/0x70 [ 32.099341] arch_local_irq_enable+0x4/0x8 (P) [ 32.100163] default_idle_call+0x6c/0x78 (L) [ 32.100909] do_idle+0x384/0x4e8 [ 32.101459] cpu_startup_entry+0x68/0x80 [ 32.101780] rest_init+0x160/0x188 [ 32.102039] start_kernel+0x308/0x3d0 [ 32.103203] __primary_switched+0x8c/0xa0 [ 32.103975] [ 32.104401] Allocated by task 187: [ 32.105046] kasan_save_stack+0x3c/0x68 [ 32.105673] kasan_save_track+0x20/0x40 [ 32.106594] kasan_save_alloc_info+0x40/0x58 [ 32.107268] __kasan_kmalloc+0xd4/0xd8 [ 32.107809] __kmalloc_cache_noprof+0x15c/0x3c0 [ 32.108496] rcu_uaf+0xb0/0x2d0 [ 32.109334] kunit_try_run_case+0x14c/0x3d0 [ 32.110083] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.110987] kthread+0x24c/0x2d0 [ 32.111252] ret_from_fork+0x10/0x20 [ 32.111502] [ 32.112117] Freed by task 0: [ 32.112845] kasan_save_stack+0x3c/0x68 [ 32.113559] kasan_save_track+0x20/0x40 [ 32.114250] kasan_save_free_info+0x4c/0x78 [ 32.115111] __kasan_slab_free+0x6c/0x98 [ 32.116006] kfree+0x114/0x3c8 [ 32.117098] rcu_uaf_reclaim+0x28/0x70 [ 32.117707] rcu_core+0x9f4/0x1e20 [ 32.118255] rcu_core_si+0x18/0x30 [ 32.118840] handle_softirqs+0x374/0xb20 [ 32.119425] __do_softirq+0x1c/0x28 [ 32.120199] [ 32.120387] Last potentially related work creation: [ 32.120699] kasan_save_stack+0x3c/0x68 [ 32.120968] kasan_record_aux_stack+0xb4/0xc8 [ 32.121246] __call_rcu_common.constprop.0+0x74/0xa10 [ 32.121613] call_rcu+0x18/0x30 [ 32.122685] rcu_uaf+0x14c/0x2d0 [ 32.123285] kunit_try_run_case+0x14c/0x3d0 [ 32.123971] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.125706] kthread+0x24c/0x2d0 [ 32.126598] ret_from_fork+0x10/0x20 [ 32.127154] [ 32.127564] The buggy address belongs to the object at fff00000c66cf640 [ 32.127564] which belongs to the cache kmalloc-32 of size 32 [ 32.128686] The buggy address is located 0 bytes inside of [ 32.128686] freed 32-byte region [fff00000c66cf640, fff00000c66cf660) [ 32.129828] [ 32.130198] The buggy address belongs to the physical page: [ 32.130954] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066cf [ 32.132919] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.133719] page_type: f5(slab) [ 32.134274] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.135757] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.136358] page dumped because: kasan: bad access detected [ 32.137124] [ 32.137477] Memory state around the buggy address: [ 32.138169] fff00000c66cf500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.139285] fff00000c66cf580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.140297] >fff00000c66cf600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.141232] ^ [ 32.141992] fff00000c66cf680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.143127] fff00000c66cf700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.144036] ==================================================================
[ 24.852098] ================================================================== [ 24.852667] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 24.853048] Read of size 4 at addr ffff8881024751c0 by task swapper/1/0 [ 24.853973] [ 24.854167] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 24.854731] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.855032] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.856124] Call Trace: [ 24.856592] <IRQ> [ 24.856807] dump_stack_lvl+0x73/0xb0 [ 24.857165] print_report+0xd1/0x640 [ 24.857682] ? __virt_addr_valid+0x1db/0x2d0 [ 24.858165] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.858956] kasan_report+0x102/0x140 [ 24.859699] ? rcu_uaf_reclaim+0x50/0x60 [ 24.860413] ? rcu_uaf_reclaim+0x50/0x60 [ 24.860735] __asan_report_load4_noabort+0x18/0x20 [ 24.861467] rcu_uaf_reclaim+0x50/0x60 [ 24.862042] rcu_core+0x680/0x1d70 [ 24.862546] ? __pfx_rcu_core+0x10/0x10 [ 24.863005] rcu_core_si+0x12/0x20 [ 24.863379] handle_softirqs+0x209/0x720 [ 24.863855] ? hrtimer_interrupt+0x2fe/0x780 [ 24.864534] ? __pfx_handle_softirqs+0x10/0x10 [ 24.865018] __irq_exit_rcu+0xc9/0x110 [ 24.865491] irq_exit_rcu+0x12/0x20 [ 24.865878] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.866573] </IRQ> [ 24.866912] <TASK> [ 24.867230] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.868034] RIP: 0010:default_idle+0xf/0x20 [ 24.868843] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 53 3b 13 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 24.870437] RSP: 0000:ffff888100877de0 EFLAGS: 00010216 [ 24.870820] RAX: ffff88815b100000 RBX: ffff888100845000 RCX: ffffffffabb27165 [ 24.871502] RDX: ffffed102b626b23 RSI: 0000000000000004 RDI: 000000000000e51c [ 24.872449] RBP: ffff888100877de8 R08: 0000000000000001 R09: ffffed102b626b22 [ 24.872989] R10: ffff88815b135913 R11: 0000000000000000 R12: 0000000000000001 [ 24.873679] R13: ffffed1020108a00 R14: ffffffffad781f90 R15: 0000000000000000 [ 24.874586] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 24.875224] ? arch_cpu_idle+0xd/0x20 [ 24.875582] default_idle_call+0x48/0x80 [ 24.875902] do_idle+0x310/0x3c0 [ 24.876401] ? __pfx_do_idle+0x10/0x10 [ 24.876758] cpu_startup_entry+0x5c/0x70 [ 24.877319] start_secondary+0x216/0x290 [ 24.877644] ? __pfx_start_secondary+0x10/0x10 [ 24.878282] common_startup_64+0x12c/0x138 [ 24.878641] </TASK> [ 24.878958] [ 24.879272] Allocated by task 206: [ 24.879611] kasan_save_stack+0x3d/0x60 [ 24.880054] kasan_save_track+0x18/0x40 [ 24.880554] kasan_save_alloc_info+0x3b/0x50 [ 24.880836] __kasan_kmalloc+0xb7/0xc0 [ 24.881383] __kmalloc_cache_noprof+0x184/0x410 [ 24.881825] rcu_uaf+0xb1/0x330 [ 24.882233] kunit_try_run_case+0x1b3/0x490 [ 24.882706] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.883237] kthread+0x257/0x310 [ 24.883496] ret_from_fork+0x41/0x80 [ 24.883735] ret_from_fork_asm+0x1a/0x30 [ 24.884310] [ 24.884551] Freed by task 0: [ 24.884976] kasan_save_stack+0x3d/0x60 [ 24.885522] kasan_save_track+0x18/0x40 [ 24.885873] kasan_save_free_info+0x3f/0x60 [ 24.886446] __kasan_slab_free+0x56/0x70 [ 24.886826] kfree+0x123/0x3f0 [ 24.887157] rcu_uaf_reclaim+0x1f/0x60 [ 24.887429] rcu_core+0x680/0x1d70 [ 24.887725] rcu_core_si+0x12/0x20 [ 24.888281] handle_softirqs+0x209/0x720 [ 24.888747] __irq_exit_rcu+0xc9/0x110 [ 24.889322] irq_exit_rcu+0x12/0x20 [ 24.889604] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.890228] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.890661] [ 24.890975] Last potentially related work creation: [ 24.891390] kasan_save_stack+0x3d/0x60 [ 24.891711] kasan_record_aux_stack+0xb2/0xc0 [ 24.892037] __call_rcu_common.constprop.0+0x72/0xaa0 [ 24.892502] call_rcu+0x12/0x20 [ 24.892897] rcu_uaf+0x169/0x330 [ 24.893396] kunit_try_run_case+0x1b3/0x490 [ 24.893924] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.894466] kthread+0x257/0x310 [ 24.894729] ret_from_fork+0x41/0x80 [ 24.895047] ret_from_fork_asm+0x1a/0x30 [ 24.895647] [ 24.895909] The buggy address belongs to the object at ffff8881024751c0 [ 24.895909] which belongs to the cache kmalloc-32 of size 32 [ 24.896953] The buggy address is located 0 bytes inside of [ 24.896953] freed 32-byte region [ffff8881024751c0, ffff8881024751e0) [ 24.897910] [ 24.898247] The buggy address belongs to the physical page: [ 24.898816] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102475 [ 24.899420] flags: 0x200000000000000(node=0|zone=2) [ 24.899807] page_type: f5(slab) [ 24.900282] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 24.901156] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 24.901745] page dumped because: kasan: bad access detected [ 24.903904] [ 24.904229] Memory state around the buggy address: [ 24.904704] ffff888102475080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.905269] ffff888102475100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.906060] >ffff888102475180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.906686] ^ [ 24.907205] ffff888102475200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.907871] ffff888102475280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.908462] ==================================================================