Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.946770] ================================================================== [ 16.946924] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 16.946981] Write of size 33 at addr fff00000c78c3700 by task kunit_try_catch/186 [ 16.947043] [ 16.947397] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.947540] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.947571] Hardware name: linux,dummy-virt (DT) [ 16.947606] Call trace: [ 16.947666] show_stack+0x20/0x38 (C) [ 16.947865] dump_stack_lvl+0x8c/0xd0 [ 16.947930] print_report+0x118/0x608 [ 16.947976] kasan_report+0xdc/0x128 [ 16.948039] kasan_check_range+0x100/0x1a8 [ 16.948087] __asan_memset+0x34/0x78 [ 16.948129] kmalloc_uaf_memset+0x170/0x310 [ 16.948548] kunit_try_run_case+0x170/0x3f0 [ 16.948637] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.949125] kthread+0x328/0x630 [ 16.949260] ret_from_fork+0x10/0x20 [ 16.949369] [ 16.949432] Allocated by task 186: [ 16.949474] kasan_save_stack+0x3c/0x68 [ 16.949670] kasan_save_track+0x20/0x40 [ 16.949906] kasan_save_alloc_info+0x40/0x58 [ 16.949962] __kasan_kmalloc+0xd4/0xd8 [ 16.950062] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.950122] kmalloc_uaf_memset+0xb8/0x310 [ 16.950171] kunit_try_run_case+0x170/0x3f0 [ 16.950208] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.950250] kthread+0x328/0x630 [ 16.950282] ret_from_fork+0x10/0x20 [ 16.950319] [ 16.950337] Freed by task 186: [ 16.950379] kasan_save_stack+0x3c/0x68 [ 16.950423] kasan_save_track+0x20/0x40 [ 16.950466] kasan_save_free_info+0x4c/0x78 [ 16.950503] __kasan_slab_free+0x6c/0x98 [ 16.950540] kfree+0x214/0x3c8 [ 16.950570] kmalloc_uaf_memset+0x11c/0x310 [ 16.950608] kunit_try_run_case+0x170/0x3f0 [ 16.950645] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.950686] kthread+0x328/0x630 [ 16.950740] ret_from_fork+0x10/0x20 [ 16.950784] [ 16.950802] The buggy address belongs to the object at fff00000c78c3700 [ 16.950802] which belongs to the cache kmalloc-64 of size 64 [ 16.950868] The buggy address is located 0 bytes inside of [ 16.950868] freed 64-byte region [fff00000c78c3700, fff00000c78c3740) [ 16.950928] [ 16.950969] The buggy address belongs to the physical page: [ 16.950999] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078c3 [ 16.951370] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.951754] page_type: f5(slab) [ 16.951839] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.951907] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.951973] page dumped because: kasan: bad access detected [ 16.952078] [ 16.952275] Memory state around the buggy address: [ 16.952545] fff00000c78c3600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.952722] fff00000c78c3680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.952790] >fff00000c78c3700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.952828] ^ [ 16.953180] fff00000c78c3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.953253] fff00000c78c3800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.953798] ==================================================================
[ 11.746423] ================================================================== [ 11.747010] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.748313] Write of size 33 at addr ffff888103338600 by task kunit_try_catch/204 [ 11.749380] [ 11.749597] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.749646] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.749657] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.749685] Call Trace: [ 11.749698] <TASK> [ 11.749714] dump_stack_lvl+0x73/0xb0 [ 11.749743] print_report+0xd1/0x650 [ 11.749766] ? __virt_addr_valid+0x1db/0x2d0 [ 11.749788] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.749807] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.749828] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.749848] kasan_report+0x141/0x180 [ 11.749869] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.749893] kasan_check_range+0x10c/0x1c0 [ 11.749915] __asan_memset+0x27/0x50 [ 11.749934] kmalloc_uaf_memset+0x1a3/0x360 [ 11.749954] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.749976] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.750000] kunit_try_run_case+0x1a5/0x480 [ 11.750024] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.750044] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.750067] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.750088] ? __kthread_parkme+0x82/0x180 [ 11.750120] ? preempt_count_sub+0x50/0x80 [ 11.750142] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.750189] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.750212] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.750234] kthread+0x337/0x6f0 [ 11.750285] ? trace_preempt_on+0x20/0xc0 [ 11.750311] ? __pfx_kthread+0x10/0x10 [ 11.750346] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.750366] ? calculate_sigpending+0x7b/0xa0 [ 11.750388] ? __pfx_kthread+0x10/0x10 [ 11.750409] ret_from_fork+0x116/0x1d0 [ 11.750426] ? __pfx_kthread+0x10/0x10 [ 11.750445] ret_from_fork_asm+0x1a/0x30 [ 11.750485] </TASK> [ 11.750497] [ 11.760139] Allocated by task 204: [ 11.760470] kasan_save_stack+0x45/0x70 [ 11.760675] kasan_save_track+0x18/0x40 [ 11.760856] kasan_save_alloc_info+0x3b/0x50 [ 11.761077] __kasan_kmalloc+0xb7/0xc0 [ 11.761396] __kmalloc_cache_noprof+0x189/0x420 [ 11.761597] kmalloc_uaf_memset+0xa9/0x360 [ 11.761764] kunit_try_run_case+0x1a5/0x480 [ 11.761977] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.762261] kthread+0x337/0x6f0 [ 11.762570] ret_from_fork+0x116/0x1d0 [ 11.762932] ret_from_fork_asm+0x1a/0x30 [ 11.763077] [ 11.763158] Freed by task 204: [ 11.763275] kasan_save_stack+0x45/0x70 [ 11.763471] kasan_save_track+0x18/0x40 [ 11.763755] kasan_save_free_info+0x3f/0x60 [ 11.763985] __kasan_slab_free+0x56/0x70 [ 11.764272] kfree+0x222/0x3f0 [ 11.764711] kmalloc_uaf_memset+0x12b/0x360 [ 11.764893] kunit_try_run_case+0x1a5/0x480 [ 11.765041] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.765284] kthread+0x337/0x6f0 [ 11.765450] ret_from_fork+0x116/0x1d0 [ 11.765634] ret_from_fork_asm+0x1a/0x30 [ 11.766010] [ 11.766085] The buggy address belongs to the object at ffff888103338600 [ 11.766085] which belongs to the cache kmalloc-64 of size 64 [ 11.766835] The buggy address is located 0 bytes inside of [ 11.766835] freed 64-byte region [ffff888103338600, ffff888103338640) [ 11.767483] [ 11.767599] The buggy address belongs to the physical page: [ 11.767839] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103338 [ 11.768189] flags: 0x200000000000000(node=0|zone=2) [ 11.768765] page_type: f5(slab) [ 11.768918] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.769333] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.769692] page dumped because: kasan: bad access detected [ 11.769923] [ 11.770127] Memory state around the buggy address: [ 11.770409] ffff888103338500: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 11.770747] ffff888103338580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.771073] >ffff888103338600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.771459] ^ [ 11.771576] ffff888103338680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.771791] ffff888103338700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.772373] ==================================================================