Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.429968] ================================================================== [ 18.430042] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 18.430109] Read of size 1 at addr fff00000c65b5e28 by task kunit_try_catch/188 [ 18.430160] [ 18.430199] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 18.430286] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.430314] Hardware name: linux,dummy-virt (DT) [ 18.430346] Call trace: [ 18.430369] show_stack+0x20/0x38 (C) [ 18.430420] dump_stack_lvl+0x8c/0xd0 [ 18.433986] print_report+0x118/0x608 [ 18.434036] kasan_report+0xdc/0x128 [ 18.434083] __asan_report_load1_noabort+0x20/0x30 [ 18.434133] kmalloc_uaf2+0x3f4/0x468 [ 18.434179] kunit_try_run_case+0x170/0x3f0 [ 18.434234] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.434287] kthread+0x328/0x630 [ 18.434335] ret_from_fork+0x10/0x20 [ 18.434386] [ 18.434406] Allocated by task 188: [ 18.434695] kasan_save_stack+0x3c/0x68 [ 18.434815] kasan_save_track+0x20/0x40 [ 18.434914] kasan_save_alloc_info+0x40/0x58 [ 18.434969] __kasan_kmalloc+0xd4/0xd8 [ 18.435058] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.435197] kmalloc_uaf2+0xc4/0x468 [ 18.435275] kunit_try_run_case+0x170/0x3f0 [ 18.435550] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.435685] kthread+0x328/0x630 [ 18.435744] ret_from_fork+0x10/0x20 [ 18.435826] [ 18.435934] Freed by task 188: [ 18.436016] kasan_save_stack+0x3c/0x68 [ 18.436055] kasan_save_track+0x20/0x40 [ 18.436092] kasan_save_free_info+0x4c/0x78 [ 18.436136] __kasan_slab_free+0x6c/0x98 [ 18.436173] kfree+0x214/0x3c8 [ 18.436207] kmalloc_uaf2+0x134/0x468 [ 18.436240] kunit_try_run_case+0x170/0x3f0 [ 18.436311] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.436388] kthread+0x328/0x630 [ 18.436419] ret_from_fork+0x10/0x20 [ 18.436502] [ 18.436524] The buggy address belongs to the object at fff00000c65b5e00 [ 18.436524] which belongs to the cache kmalloc-64 of size 64 [ 18.436582] The buggy address is located 40 bytes inside of [ 18.436582] freed 64-byte region [fff00000c65b5e00, fff00000c65b5e40) [ 18.436642] [ 18.436664] The buggy address belongs to the physical page: [ 18.436696] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065b5 [ 18.436812] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.436888] page_type: f5(slab) [ 18.436929] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 18.436981] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 18.437023] page dumped because: kasan: bad access detected [ 18.437054] [ 18.437072] Memory state around the buggy address: [ 18.437165] fff00000c65b5d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.437254] fff00000c65b5d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.437328] >fff00000c65b5e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 18.437377] ^ [ 18.437409] fff00000c65b5e80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 18.437470] fff00000c65b5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.437510] ==================================================================
[ 14.925403] ================================================================== [ 14.925978] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 14.926980] Read of size 1 at addr ffff888103333928 by task kunit_try_catch/205 [ 14.927407] [ 14.927779] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 14.927915] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.927933] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.927983] Call Trace: [ 14.928011] <TASK> [ 14.928049] dump_stack_lvl+0x73/0xb0 [ 14.928121] print_report+0xd1/0x650 [ 14.928174] ? __virt_addr_valid+0x1db/0x2d0 [ 14.928311] ? kmalloc_uaf2+0x4a8/0x520 [ 14.928366] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.928418] ? kmalloc_uaf2+0x4a8/0x520 [ 14.928481] kasan_report+0x141/0x180 [ 14.928535] ? kmalloc_uaf2+0x4a8/0x520 [ 14.928589] __asan_report_load1_noabort+0x18/0x20 [ 14.928618] kmalloc_uaf2+0x4a8/0x520 [ 14.928641] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 14.928662] ? finish_task_switch.isra.0+0x153/0x700 [ 14.928689] ? __switch_to+0x47/0xf50 [ 14.928718] ? __schedule+0x10cc/0x2b60 [ 14.928745] ? __pfx_read_tsc+0x10/0x10 [ 14.928768] ? ktime_get_ts64+0x86/0x230 [ 14.928797] kunit_try_run_case+0x1a5/0x480 [ 14.928821] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.928842] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.928867] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.928892] ? __kthread_parkme+0x82/0x180 [ 14.928913] ? preempt_count_sub+0x50/0x80 [ 14.928937] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.928958] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.928983] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.929007] kthread+0x337/0x6f0 [ 14.929027] ? trace_preempt_on+0x20/0xc0 [ 14.929051] ? __pfx_kthread+0x10/0x10 [ 14.929073] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.929096] ? calculate_sigpending+0x7b/0xa0 [ 14.929120] ? __pfx_kthread+0x10/0x10 [ 14.929142] ret_from_fork+0x116/0x1d0 [ 14.929162] ? __pfx_kthread+0x10/0x10 [ 14.929184] ret_from_fork_asm+0x1a/0x30 [ 14.929260] </TASK> [ 14.929275] [ 14.941424] Allocated by task 205: [ 14.941913] kasan_save_stack+0x45/0x70 [ 14.942389] kasan_save_track+0x18/0x40 [ 14.942788] kasan_save_alloc_info+0x3b/0x50 [ 14.943337] __kasan_kmalloc+0xb7/0xc0 [ 14.943775] __kmalloc_cache_noprof+0x189/0x420 [ 14.944231] kmalloc_uaf2+0xc6/0x520 [ 14.944592] kunit_try_run_case+0x1a5/0x480 [ 14.944972] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.945360] kthread+0x337/0x6f0 [ 14.945730] ret_from_fork+0x116/0x1d0 [ 14.945942] ret_from_fork_asm+0x1a/0x30 [ 14.946356] [ 14.946541] Freed by task 205: [ 14.946761] kasan_save_stack+0x45/0x70 [ 14.947164] kasan_save_track+0x18/0x40 [ 14.947623] kasan_save_free_info+0x3f/0x60 [ 14.947978] __kasan_slab_free+0x56/0x70 [ 14.948254] kfree+0x222/0x3f0 [ 14.948567] kmalloc_uaf2+0x14c/0x520 [ 14.948892] kunit_try_run_case+0x1a5/0x480 [ 14.949153] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.949607] kthread+0x337/0x6f0 [ 14.949870] ret_from_fork+0x116/0x1d0 [ 14.950176] ret_from_fork_asm+0x1a/0x30 [ 14.950424] [ 14.950648] The buggy address belongs to the object at ffff888103333900 [ 14.950648] which belongs to the cache kmalloc-64 of size 64 [ 14.951409] The buggy address is located 40 bytes inside of [ 14.951409] freed 64-byte region [ffff888103333900, ffff888103333940) [ 14.951943] [ 14.952162] The buggy address belongs to the physical page: [ 14.952646] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103333 [ 14.953120] flags: 0x200000000000000(node=0|zone=2) [ 14.953591] page_type: f5(slab) [ 14.953839] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 14.954374] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 14.954811] page dumped because: kasan: bad access detected [ 14.955160] [ 14.955312] Memory state around the buggy address: [ 14.955726] ffff888103333800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.956279] ffff888103333880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.956614] >ffff888103333900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.957028] ^ [ 14.957445] ffff888103333980: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 14.957955] ffff888103333a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.958403] ==================================================================