Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 27.869051] ================================================================== [ 27.869259] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 27.869426] Read of size 1 at addr fff00000c775e1a8 by task kunit_try_catch/190 [ 27.869599] [ 27.869693] CPU: 0 UID: 0 PID: 190 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 27.869931] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.870009] Hardware name: linux,dummy-virt (DT) [ 27.870117] Call trace: [ 27.870245] show_stack+0x20/0x38 (C) [ 27.870737] dump_stack_lvl+0x8c/0xd0 [ 27.871117] print_report+0x118/0x608 [ 27.871617] kasan_report+0xdc/0x128 [ 27.871857] __asan_report_load1_noabort+0x20/0x30 [ 27.872293] kmalloc_uaf2+0x3f4/0x468 [ 27.872691] kunit_try_run_case+0x170/0x3f0 [ 27.873040] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.873222] kthread+0x328/0x630 [ 27.873328] ret_from_fork+0x10/0x20 [ 27.873740] [ 27.873935] Allocated by task 190: [ 27.874027] kasan_save_stack+0x3c/0x68 [ 27.874149] kasan_save_track+0x20/0x40 [ 27.874332] kasan_save_alloc_info+0x40/0x58 [ 27.874648] __kasan_kmalloc+0xd4/0xd8 [ 27.874853] __kmalloc_cache_noprof+0x15c/0x3c0 [ 27.874984] kmalloc_uaf2+0xc4/0x468 [ 27.875099] kunit_try_run_case+0x170/0x3f0 [ 27.875212] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.875938] kthread+0x328/0x630 [ 27.876479] ret_from_fork+0x10/0x20 [ 27.876626] [ 27.876681] Freed by task 190: [ 27.876759] kasan_save_stack+0x3c/0x68 [ 27.876870] kasan_save_track+0x20/0x40 [ 27.876967] kasan_save_free_info+0x4c/0x78 [ 27.877054] __kasan_slab_free+0x6c/0x98 [ 27.877492] kfree+0x214/0x3c8 [ 27.877977] kmalloc_uaf2+0x134/0x468 [ 27.878303] kunit_try_run_case+0x170/0x3f0 [ 27.878432] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.878587] kthread+0x328/0x630 [ 27.878689] ret_from_fork+0x10/0x20 [ 27.878788] [ 27.879405] The buggy address belongs to the object at fff00000c775e180 [ 27.879405] which belongs to the cache kmalloc-64 of size 64 [ 27.880039] The buggy address is located 40 bytes inside of [ 27.880039] freed 64-byte region [fff00000c775e180, fff00000c775e1c0) [ 27.880373] [ 27.880438] The buggy address belongs to the physical page: [ 27.880623] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10775e [ 27.880782] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.880930] page_type: f5(slab) [ 27.881037] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 27.883516] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 27.884124] page dumped because: kasan: bad access detected [ 27.884225] [ 27.884376] Memory state around the buggy address: [ 27.884672] fff00000c775e080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.885095] fff00000c775e100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.885400] >fff00000c775e180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.885762] ^ [ 27.885899] fff00000c775e200: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 27.886033] fff00000c775e280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.886847] ==================================================================
[ 12.896109] ================================================================== [ 12.896817] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 12.897230] Read of size 1 at addr ffff888102701628 by task kunit_try_catch/207 [ 12.897875] [ 12.898187] CPU: 0 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 12.898276] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.898290] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.898324] Call Trace: [ 12.898337] <TASK> [ 12.898358] dump_stack_lvl+0x73/0xb0 [ 12.898389] print_report+0xd1/0x650 [ 12.898411] ? __virt_addr_valid+0x1db/0x2d0 [ 12.898434] ? kmalloc_uaf2+0x4a8/0x520 [ 12.898453] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.898475] ? kmalloc_uaf2+0x4a8/0x520 [ 12.898495] kasan_report+0x141/0x180 [ 12.898517] ? kmalloc_uaf2+0x4a8/0x520 [ 12.898542] __asan_report_load1_noabort+0x18/0x20 [ 12.898561] kmalloc_uaf2+0x4a8/0x520 [ 12.898582] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.898601] ? finish_task_switch.isra.0+0x153/0x700 [ 12.898625] ? __switch_to+0x5d9/0xf60 [ 12.898645] ? dequeue_task_fair+0x166/0x4e0 [ 12.898677] ? __schedule+0x10cc/0x2b30 [ 12.898699] ? __pfx_read_tsc+0x10/0x10 [ 12.898718] ? ktime_get_ts64+0x86/0x230 [ 12.898743] kunit_try_run_case+0x1a5/0x480 [ 12.898767] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.898788] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.898810] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.898832] ? __kthread_parkme+0x82/0x180 [ 12.898853] ? preempt_count_sub+0x50/0x80 [ 12.898965] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.898992] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.899014] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.899036] kthread+0x337/0x6f0 [ 12.899052] ? trace_preempt_on+0x20/0xc0 [ 12.899076] ? __pfx_kthread+0x10/0x10 [ 12.899094] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.899114] ? calculate_sigpending+0x7b/0xa0 [ 12.899135] ? __pfx_kthread+0x10/0x10 [ 12.899153] ret_from_fork+0x41/0x80 [ 12.899174] ? __pfx_kthread+0x10/0x10 [ 12.899191] ret_from_fork_asm+0x1a/0x30 [ 12.899221] </TASK> [ 12.899234] [ 12.914010] Allocated by task 207: [ 12.914536] kasan_save_stack+0x45/0x70 [ 12.914997] kasan_save_track+0x18/0x40 [ 12.915148] kasan_save_alloc_info+0x3b/0x50 [ 12.915313] __kasan_kmalloc+0xb7/0xc0 [ 12.915486] __kmalloc_cache_noprof+0x189/0x420 [ 12.916273] kmalloc_uaf2+0xc6/0x520 [ 12.917083] kunit_try_run_case+0x1a5/0x480 [ 12.917633] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.918443] kthread+0x337/0x6f0 [ 12.918743] ret_from_fork+0x41/0x80 [ 12.918991] ret_from_fork_asm+0x1a/0x30 [ 12.919513] [ 12.919726] Freed by task 207: [ 12.920282] kasan_save_stack+0x45/0x70 [ 12.921068] kasan_save_track+0x18/0x40 [ 12.921447] kasan_save_free_info+0x3f/0x60 [ 12.921761] __kasan_slab_free+0x56/0x70 [ 12.922063] kfree+0x222/0x3f0 [ 12.922216] kmalloc_uaf2+0x14c/0x520 [ 12.922411] kunit_try_run_case+0x1a5/0x480 [ 12.923088] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.923474] kthread+0x337/0x6f0 [ 12.923808] ret_from_fork+0x41/0x80 [ 12.924125] ret_from_fork_asm+0x1a/0x30 [ 12.924333] [ 12.924435] The buggy address belongs to the object at ffff888102701600 [ 12.924435] which belongs to the cache kmalloc-64 of size 64 [ 12.925373] The buggy address is located 40 bytes inside of [ 12.925373] freed 64-byte region [ffff888102701600, ffff888102701640) [ 12.926348] [ 12.926807] The buggy address belongs to the physical page: [ 12.927312] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102701 [ 12.927802] flags: 0x200000000000000(node=0|zone=2) [ 12.928236] page_type: f5(slab) [ 12.928403] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.928963] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.929715] page dumped because: kasan: bad access detected [ 12.930018] [ 12.930262] Memory state around the buggy address: [ 12.930707] ffff888102701500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.931442] ffff888102701580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.931840] >ffff888102701600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.932390] ^ [ 12.932693] ffff888102701680: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 12.932969] ffff888102701700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.933302] ==================================================================