Date
June 20, 2025, 12:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.218110] ================================================================== [ 32.218316] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 32.218472] Read of size 1 at addr fff00000c58d29a8 by task kunit_try_catch/195 [ 32.218599] [ 32.220105] CPU: 1 UID: 0 PID: 195 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT [ 32.221384] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.221914] Hardware name: linux,dummy-virt (DT) [ 32.222003] Call trace: [ 32.222102] show_stack+0x20/0x38 (C) [ 32.222442] dump_stack_lvl+0x8c/0xd0 [ 32.222647] print_report+0x118/0x608 [ 32.222893] kasan_report+0xdc/0x128 [ 32.223188] __asan_report_load1_noabort+0x20/0x30 [ 32.224098] kmalloc_uaf+0x300/0x338 [ 32.224505] kunit_try_run_case+0x170/0x3f0 [ 32.224727] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.224870] kthread+0x328/0x630 [ 32.224980] ret_from_fork+0x10/0x20 [ 32.225099] [ 32.225141] Allocated by task 195: [ 32.225199] kasan_save_stack+0x3c/0x68 [ 32.225279] kasan_save_track+0x20/0x40 [ 32.225363] kasan_save_alloc_info+0x40/0x58 [ 32.226460] __kasan_kmalloc+0xd4/0xd8 [ 32.226917] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.227496] kmalloc_uaf+0xb8/0x338 [ 32.227720] kunit_try_run_case+0x170/0x3f0 [ 32.227902] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.228149] kthread+0x328/0x630 [ 32.228492] ret_from_fork+0x10/0x20 [ 32.229309] [ 32.229378] Freed by task 195: [ 32.229492] kasan_save_stack+0x3c/0x68 [ 32.229727] kasan_save_track+0x20/0x40 [ 32.229945] kasan_save_free_info+0x4c/0x78 [ 32.230067] __kasan_slab_free+0x6c/0x98 [ 32.230284] kfree+0x214/0x3c8 [ 32.230382] kmalloc_uaf+0x11c/0x338 [ 32.231055] kunit_try_run_case+0x170/0x3f0 [ 32.231304] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.231900] kthread+0x328/0x630 [ 32.232083] ret_from_fork+0x10/0x20 [ 32.232357] [ 32.232473] The buggy address belongs to the object at fff00000c58d29a0 [ 32.232473] which belongs to the cache kmalloc-16 of size 16 [ 32.232653] The buggy address is located 8 bytes inside of [ 32.232653] freed 16-byte region [fff00000c58d29a0, fff00000c58d29b0) [ 32.232791] [ 32.232840] The buggy address belongs to the physical page: [ 32.232906] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058d2 [ 32.234144] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.234764] page_type: f5(slab) [ 32.235381] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 32.235599] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 32.235721] page dumped because: kasan: bad access detected [ 32.236350] [ 32.236538] Memory state around the buggy address: [ 32.236729] fff00000c58d2880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.237115] fff00000c58d2900: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 32.237216] >fff00000c58d2980: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 32.237288] ^ [ 32.237353] fff00000c58d2a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.237428] fff00000c58d2a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.237878] ==================================================================
[ 25.865068] ================================================================== [ 25.865692] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 25.866463] Read of size 1 at addr ffff8881022cf728 by task kunit_try_catch/213 [ 25.867057] [ 25.867231] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT(voluntary) [ 25.867338] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.867367] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.867415] Call Trace: [ 25.867457] <TASK> [ 25.867496] dump_stack_lvl+0x73/0xb0 [ 25.867551] print_report+0xd1/0x650 [ 25.867588] ? __virt_addr_valid+0x1db/0x2d0 [ 25.867615] ? kmalloc_uaf+0x320/0x380 [ 25.867642] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.867685] ? kmalloc_uaf+0x320/0x380 [ 25.867724] kasan_report+0x141/0x180 [ 25.867770] ? kmalloc_uaf+0x320/0x380 [ 25.867822] __asan_report_load1_noabort+0x18/0x20 [ 25.867871] kmalloc_uaf+0x320/0x380 [ 25.867911] ? __pfx_kmalloc_uaf+0x10/0x10 [ 25.867944] ? __schedule+0x10cc/0x2b60 [ 25.867969] ? __pfx_read_tsc+0x10/0x10 [ 25.867992] ? ktime_get_ts64+0x86/0x230 [ 25.868021] kunit_try_run_case+0x1a5/0x480 [ 25.868049] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.868072] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.868097] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.868121] ? __kthread_parkme+0x82/0x180 [ 25.868149] ? preempt_count_sub+0x50/0x80 [ 25.868190] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.868381] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.868452] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.868505] kthread+0x337/0x6f0 [ 25.868553] ? trace_preempt_on+0x20/0xc0 [ 25.868606] ? __pfx_kthread+0x10/0x10 [ 25.868653] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.868702] ? calculate_sigpending+0x7b/0xa0 [ 25.868780] ? __pfx_kthread+0x10/0x10 [ 25.868814] ret_from_fork+0x116/0x1d0 [ 25.868838] ? __pfx_kthread+0x10/0x10 [ 25.868860] ret_from_fork_asm+0x1a/0x30 [ 25.868893] </TASK> [ 25.868908] [ 25.880333] Allocated by task 213: [ 25.881453] kasan_save_stack+0x45/0x70 [ 25.882047] kasan_save_track+0x18/0x40 [ 25.882477] kasan_save_alloc_info+0x3b/0x50 [ 25.882830] __kasan_kmalloc+0xb7/0xc0 [ 25.883005] __kmalloc_cache_noprof+0x189/0x420 [ 25.883208] kmalloc_uaf+0xaa/0x380 [ 25.883373] kunit_try_run_case+0x1a5/0x480 [ 25.883811] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.884184] kthread+0x337/0x6f0 [ 25.884540] ret_from_fork+0x116/0x1d0 [ 25.885332] ret_from_fork_asm+0x1a/0x30 [ 25.885829] [ 25.886006] Freed by task 213: [ 25.886716] kasan_save_stack+0x45/0x70 [ 25.887321] kasan_save_track+0x18/0x40 [ 25.887529] kasan_save_free_info+0x3f/0x60 [ 25.887871] __kasan_slab_free+0x56/0x70 [ 25.888214] kfree+0x222/0x3f0 [ 25.888408] kmalloc_uaf+0x12c/0x380 [ 25.888583] kunit_try_run_case+0x1a5/0x480 [ 25.888860] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.889270] kthread+0x337/0x6f0 [ 25.889578] ret_from_fork+0x116/0x1d0 [ 25.889861] ret_from_fork_asm+0x1a/0x30 [ 25.889998] [ 25.890088] The buggy address belongs to the object at ffff8881022cf720 [ 25.890088] which belongs to the cache kmalloc-16 of size 16 [ 25.890386] The buggy address is located 8 bytes inside of [ 25.890386] freed 16-byte region [ffff8881022cf720, ffff8881022cf730) [ 25.890677] [ 25.890757] The buggy address belongs to the physical page: [ 25.891314] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022cf [ 25.892112] flags: 0x200000000000000(node=0|zone=2) [ 25.892802] page_type: f5(slab) [ 25.894196] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 25.895671] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 25.896268] page dumped because: kasan: bad access detected [ 25.897241] [ 25.897359] Memory state around the buggy address: [ 25.897563] ffff8881022cf600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.898401] ffff8881022cf680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 25.898673] >ffff8881022cf700: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 25.899213] ^ [ 25.899588] ffff8881022cf780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.900011] ffff8881022cf800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.900436] ==================================================================