Date
June 25, 2025, 8:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 26.786144] ================================================================== [ 26.786208] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 26.786270] Write of size 33 at addr fff00000c78b0d00 by task kunit_try_catch/198 [ 26.786321] [ 26.786359] CPU: 1 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT [ 26.786457] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.786484] Hardware name: linux,dummy-virt (DT) [ 26.786517] Call trace: [ 26.786540] show_stack+0x20/0x38 (C) [ 26.786592] dump_stack_lvl+0x8c/0xd0 [ 26.786643] print_report+0x118/0x608 [ 26.786689] kasan_report+0xdc/0x128 [ 26.786734] kasan_check_range+0x100/0x1a8 [ 26.786781] __asan_memset+0x34/0x78 [ 26.786825] kmalloc_uaf_memset+0x170/0x310 [ 26.786871] kunit_try_run_case+0x170/0x3f0 [ 26.786919] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.786972] kthread+0x328/0x630 [ 26.787012] ret_from_fork+0x10/0x20 [ 26.787060] [ 26.787080] Allocated by task 198: [ 26.787107] kasan_save_stack+0x3c/0x68 [ 26.787157] kasan_save_track+0x20/0x40 [ 26.787194] kasan_save_alloc_info+0x40/0x58 [ 26.787231] __kasan_kmalloc+0xd4/0xd8 [ 26.787266] __kmalloc_cache_noprof+0x16c/0x3c0 [ 26.787307] kmalloc_uaf_memset+0xb8/0x310 [ 26.787342] kunit_try_run_case+0x170/0x3f0 [ 26.787381] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.787435] kthread+0x328/0x630 [ 26.787639] ret_from_fork+0x10/0x20 [ 26.787980] [ 26.788107] Freed by task 198: [ 26.788256] kasan_save_stack+0x3c/0x68 [ 26.788354] kasan_save_track+0x20/0x40 [ 26.788880] kasan_save_free_info+0x4c/0x78 [ 26.789323] __kasan_slab_free+0x6c/0x98 [ 26.789872] kfree+0x214/0x3c8 [ 26.790018] kmalloc_uaf_memset+0x11c/0x310 [ 26.790113] kunit_try_run_case+0x170/0x3f0 [ 26.790533] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 26.790852] kthread+0x328/0x630 [ 26.791000] ret_from_fork+0x10/0x20 [ 26.791321] [ 26.791735] The buggy address belongs to the object at fff00000c78b0d00 [ 26.791735] which belongs to the cache kmalloc-64 of size 64 [ 26.791898] The buggy address is located 0 bytes inside of [ 26.791898] freed 64-byte region [fff00000c78b0d00, fff00000c78b0d40) [ 26.792497] [ 26.792742] The buggy address belongs to the physical page: [ 26.792814] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078b0 [ 26.793010] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 26.793391] page_type: f5(slab) [ 26.793694] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 26.794043] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 26.794151] page dumped because: kasan: bad access detected [ 26.794360] [ 26.794491] Memory state around the buggy address: [ 26.794528] fff00000c78b0c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.794597] fff00000c78b0c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.795193] >fff00000c78b0d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.795346] ^ [ 26.795453] fff00000c78b0d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.795723] fff00000c78b0e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.795959] ==================================================================
[ 22.144667] ================================================================== [ 22.145365] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 22.146336] Write of size 33 at addr ffff888103958d80 by task kunit_try_catch/215 [ 22.146841] [ 22.146952] CPU: 1 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) [ 22.147004] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.147016] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.147038] Call Trace: [ 22.147052] <TASK> [ 22.147071] dump_stack_lvl+0x73/0xb0 [ 22.147101] print_report+0xd1/0x650 [ 22.147133] ? __virt_addr_valid+0x1db/0x2d0 [ 22.147156] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.147176] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.147200] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.147220] kasan_report+0x141/0x180 [ 22.147239] ? kmalloc_uaf_memset+0x1a3/0x360 [ 22.147302] kasan_check_range+0x10c/0x1c0 [ 22.147324] __asan_memset+0x27/0x50 [ 22.147346] kmalloc_uaf_memset+0x1a3/0x360 [ 22.147571] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 22.147593] ? __schedule+0x10cc/0x2b60 [ 22.147618] ? __pfx_read_tsc+0x10/0x10 [ 22.147639] ? ktime_get_ts64+0x86/0x230 [ 22.147664] kunit_try_run_case+0x1a5/0x480 [ 22.147689] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.147711] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.147730] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.147755] ? __kthread_parkme+0x82/0x180 [ 22.147775] ? preempt_count_sub+0x50/0x80 [ 22.147797] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.147819] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.147841] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.147863] kthread+0x337/0x6f0 [ 22.147882] ? trace_preempt_on+0x20/0xc0 [ 22.147904] ? __pfx_kthread+0x10/0x10 [ 22.147923] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.147958] ? calculate_sigpending+0x7b/0xa0 [ 22.147981] ? __pfx_kthread+0x10/0x10 [ 22.148000] ret_from_fork+0x116/0x1d0 [ 22.148019] ? __pfx_kthread+0x10/0x10 [ 22.148037] ret_from_fork_asm+0x1a/0x30 [ 22.148067] </TASK> [ 22.148078] [ 22.161258] Allocated by task 215: [ 22.161645] kasan_save_stack+0x45/0x70 [ 22.161836] kasan_save_track+0x18/0x40 [ 22.161973] kasan_save_alloc_info+0x3b/0x50 [ 22.162115] __kasan_kmalloc+0xb7/0xc0 [ 22.162237] __kmalloc_cache_noprof+0x189/0x420 [ 22.162383] kmalloc_uaf_memset+0xa9/0x360 [ 22.162516] kunit_try_run_case+0x1a5/0x480 [ 22.162657] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.162822] kthread+0x337/0x6f0 [ 22.162934] ret_from_fork+0x116/0x1d0 [ 22.163280] ret_from_fork_asm+0x1a/0x30 [ 22.163621] [ 22.163767] Freed by task 215: [ 22.164038] kasan_save_stack+0x45/0x70 [ 22.164442] kasan_save_track+0x18/0x40 [ 22.164781] kasan_save_free_info+0x3f/0x60 [ 22.165228] __kasan_slab_free+0x56/0x70 [ 22.165672] kfree+0x222/0x3f0 [ 22.165947] kmalloc_uaf_memset+0x12b/0x360 [ 22.166343] kunit_try_run_case+0x1a5/0x480 [ 22.166699] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.167162] kthread+0x337/0x6f0 [ 22.167442] ret_from_fork+0x116/0x1d0 [ 22.167760] ret_from_fork_asm+0x1a/0x30 [ 22.168128] [ 22.168279] The buggy address belongs to the object at ffff888103958d80 [ 22.168279] which belongs to the cache kmalloc-64 of size 64 [ 22.169310] The buggy address is located 0 bytes inside of [ 22.169310] freed 64-byte region [ffff888103958d80, ffff888103958dc0) [ 22.170361] [ 22.170517] The buggy address belongs to the physical page: [ 22.170780] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103958 [ 22.171026] flags: 0x200000000000000(node=0|zone=2) [ 22.171218] page_type: f5(slab) [ 22.171469] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 22.171708] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 22.171926] page dumped because: kasan: bad access detected [ 22.172097] [ 22.172447] Memory state around the buggy address: [ 22.172660] ffff888103958c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.172926] ffff888103958d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.173184] >ffff888103958d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 22.173537] ^ [ 22.173695] ffff888103958e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.173914] ffff888103958e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.174257] ==================================================================