Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.789319] ================================================================== [ 16.789727] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 16.790172] Read of size 16 at addr fff00000c3fbdd60 by task kunit_try_catch/168 [ 16.790246] [ 16.790280] CPU: 0 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.790401] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.790528] Hardware name: linux,dummy-virt (DT) [ 16.790565] Call trace: [ 16.790686] show_stack+0x20/0x38 (C) [ 16.790749] dump_stack_lvl+0x8c/0xd0 [ 16.790794] print_report+0x118/0x608 [ 16.790838] kasan_report+0xdc/0x128 [ 16.790882] __asan_report_load16_noabort+0x20/0x30 [ 16.790927] kmalloc_uaf_16+0x3bc/0x438 [ 16.790970] kunit_try_run_case+0x170/0x3f0 [ 16.791015] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.791407] kthread+0x328/0x630 [ 16.791470] ret_from_fork+0x10/0x20 [ 16.791816] [ 16.791884] Allocated by task 168: [ 16.791926] kasan_save_stack+0x3c/0x68 [ 16.791969] kasan_save_track+0x20/0x40 [ 16.792074] kasan_save_alloc_info+0x40/0x58 [ 16.792153] __kasan_kmalloc+0xd4/0xd8 [ 16.792189] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.792491] kmalloc_uaf_16+0x140/0x438 [ 16.792744] kunit_try_run_case+0x170/0x3f0 [ 16.792960] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.793070] kthread+0x328/0x630 [ 16.793157] ret_from_fork+0x10/0x20 [ 16.793226] [ 16.793355] Freed by task 168: [ 16.793392] kasan_save_stack+0x3c/0x68 [ 16.793595] kasan_save_track+0x20/0x40 [ 16.793655] kasan_save_free_info+0x4c/0x78 [ 16.793832] __kasan_slab_free+0x6c/0x98 [ 16.793985] kfree+0x214/0x3c8 [ 16.794193] kmalloc_uaf_16+0x190/0x438 [ 16.794282] kunit_try_run_case+0x170/0x3f0 [ 16.794424] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.794579] kthread+0x328/0x630 [ 16.794658] ret_from_fork+0x10/0x20 [ 16.794816] [ 16.794908] The buggy address belongs to the object at fff00000c3fbdd60 [ 16.794908] which belongs to the cache kmalloc-16 of size 16 [ 16.795354] The buggy address is located 0 bytes inside of [ 16.795354] freed 16-byte region [fff00000c3fbdd60, fff00000c3fbdd70) [ 16.795470] [ 16.795503] The buggy address belongs to the physical page: [ 16.795532] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103fbd [ 16.795769] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.795864] page_type: f5(slab) [ 16.796060] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.796116] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.796352] page dumped because: kasan: bad access detected [ 16.796401] [ 16.796491] Memory state around the buggy address: [ 16.796523] fff00000c3fbdc00: fa fb fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 16.796909] fff00000c3fbdc80: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 16.797062] >fff00000c3fbdd00: fa fb fc fc fa fb fc fc 00 00 fc fc fa fb fc fc [ 16.797104] ^ [ 16.797148] fff00000c3fbdd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.797396] fff00000c3fbde00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.797686] ==================================================================
[ 11.487929] ================================================================== [ 11.488611] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 11.488948] Read of size 16 at addr ffff888101745e80 by task kunit_try_catch/186 [ 11.489358] [ 11.489657] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.489703] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.489715] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.489733] Call Trace: [ 11.489745] <TASK> [ 11.489759] dump_stack_lvl+0x73/0xb0 [ 11.489789] print_report+0xd1/0x650 [ 11.489811] ? __virt_addr_valid+0x1db/0x2d0 [ 11.489834] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.489853] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.489874] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.489894] kasan_report+0x141/0x180 [ 11.489915] ? kmalloc_uaf_16+0x47b/0x4c0 [ 11.489939] __asan_report_load16_noabort+0x18/0x20 [ 11.489962] kmalloc_uaf_16+0x47b/0x4c0 [ 11.489982] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 11.490003] ? __schedule+0x10cc/0x2b60 [ 11.490024] ? __pfx_read_tsc+0x10/0x10 [ 11.490044] ? ktime_get_ts64+0x86/0x230 [ 11.490067] kunit_try_run_case+0x1a5/0x480 [ 11.490092] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.490127] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.490185] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.490208] ? __kthread_parkme+0x82/0x180 [ 11.490229] ? preempt_count_sub+0x50/0x80 [ 11.490252] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.490275] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.490297] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.490319] kthread+0x337/0x6f0 [ 11.490337] ? trace_preempt_on+0x20/0xc0 [ 11.490360] ? __pfx_kthread+0x10/0x10 [ 11.490380] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.490400] ? calculate_sigpending+0x7b/0xa0 [ 11.490423] ? __pfx_kthread+0x10/0x10 [ 11.490443] ret_from_fork+0x116/0x1d0 [ 11.490460] ? __pfx_kthread+0x10/0x10 [ 11.490480] ret_from_fork_asm+0x1a/0x30 [ 11.490509] </TASK> [ 11.490520] [ 11.498830] Allocated by task 186: [ 11.499029] kasan_save_stack+0x45/0x70 [ 11.499377] kasan_save_track+0x18/0x40 [ 11.499579] kasan_save_alloc_info+0x3b/0x50 [ 11.499796] __kasan_kmalloc+0xb7/0xc0 [ 11.499994] __kmalloc_cache_noprof+0x189/0x420 [ 11.500246] kmalloc_uaf_16+0x15b/0x4c0 [ 11.500551] kunit_try_run_case+0x1a5/0x480 [ 11.500770] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.501015] kthread+0x337/0x6f0 [ 11.501301] ret_from_fork+0x116/0x1d0 [ 11.501523] ret_from_fork_asm+0x1a/0x30 [ 11.501767] [ 11.501857] Freed by task 186: [ 11.501968] kasan_save_stack+0x45/0x70 [ 11.502150] kasan_save_track+0x18/0x40 [ 11.502338] kasan_save_free_info+0x3f/0x60 [ 11.502535] __kasan_slab_free+0x56/0x70 [ 11.502723] kfree+0x222/0x3f0 [ 11.503147] kmalloc_uaf_16+0x1d6/0x4c0 [ 11.503395] kunit_try_run_case+0x1a5/0x480 [ 11.503574] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.503744] kthread+0x337/0x6f0 [ 11.503903] ret_from_fork+0x116/0x1d0 [ 11.504223] ret_from_fork_asm+0x1a/0x30 [ 11.504550] [ 11.504686] The buggy address belongs to the object at ffff888101745e80 [ 11.504686] which belongs to the cache kmalloc-16 of size 16 [ 11.505333] The buggy address is located 0 bytes inside of [ 11.505333] freed 16-byte region [ffff888101745e80, ffff888101745e90) [ 11.505895] [ 11.505997] The buggy address belongs to the physical page: [ 11.506442] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101745 [ 11.506709] flags: 0x200000000000000(node=0|zone=2) [ 11.506879] page_type: f5(slab) [ 11.507051] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.507775] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.508003] page dumped because: kasan: bad access detected [ 11.508184] [ 11.508254] Memory state around the buggy address: [ 11.508476] ffff888101745d80: 00 01 fc fc 00 04 fc fc 00 04 fc fc 00 05 fc fc [ 11.508833] ffff888101745e00: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 11.509251] >ffff888101745e80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.509960] ^ [ 11.510296] ffff888101745f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.510665] ffff888101745f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.510916] ==================================================================