Date
July 9, 2025, 12:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.774748] ================================================================== [ 19.774821] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.774879] Read of size 1 at addr fff00000c6390188 by task kunit_try_catch/185 [ 19.774930] [ 19.774963] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.775048] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.775075] Hardware name: linux,dummy-virt (DT) [ 19.775106] Call trace: [ 19.775130] show_stack+0x20/0x38 (C) [ 19.775180] dump_stack_lvl+0x8c/0xd0 [ 19.776825] print_report+0x118/0x608 [ 19.777881] kasan_report+0xdc/0x128 [ 19.778417] __asan_report_load1_noabort+0x20/0x30 [ 19.778534] kmalloc_uaf+0x300/0x338 [ 19.779377] kunit_try_run_case+0x170/0x3f0 [ 19.779608] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.779663] kthread+0x328/0x630 [ 19.779706] ret_from_fork+0x10/0x20 [ 19.781771] [ 19.781809] Allocated by task 185: [ 19.781961] kasan_save_stack+0x3c/0x68 [ 19.782607] kasan_save_track+0x20/0x40 [ 19.783517] kasan_save_alloc_info+0x40/0x58 [ 19.784043] __kasan_kmalloc+0xd4/0xd8 [ 19.784276] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.784319] kmalloc_uaf+0xb8/0x338 [ 19.784355] kunit_try_run_case+0x170/0x3f0 [ 19.784394] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.784456] kthread+0x328/0x630 [ 19.785111] ret_from_fork+0x10/0x20 [ 19.785912] [ 19.786231] Freed by task 185: [ 19.786481] kasan_save_stack+0x3c/0x68 [ 19.787060] kasan_save_track+0x20/0x40 [ 19.787149] kasan_save_free_info+0x4c/0x78 [ 19.787797] __kasan_slab_free+0x6c/0x98 [ 19.788125] kfree+0x214/0x3c8 [ 19.788172] kmalloc_uaf+0x11c/0x338 [ 19.788208] kunit_try_run_case+0x170/0x3f0 [ 19.788249] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.788302] kthread+0x328/0x630 [ 19.790046] ret_from_fork+0x10/0x20 [ 19.790299] [ 19.790548] The buggy address belongs to the object at fff00000c6390180 [ 19.790548] which belongs to the cache kmalloc-16 of size 16 [ 19.791226] The buggy address is located 8 bytes inside of [ 19.791226] freed 16-byte region [fff00000c6390180, fff00000c6390190) [ 19.791539] [ 19.791750] The buggy address belongs to the physical page: [ 19.792426] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106390 [ 19.792491] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.792613] page_type: f5(slab) [ 19.792851] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.792978] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.793511] page dumped because: kasan: bad access detected [ 19.793857] [ 19.793976] Memory state around the buggy address: [ 19.794216] fff00000c6390080: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 19.794264] fff00000c6390100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.794814] >fff00000c6390180: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.795941] ^ [ 19.796111] fff00000c6390200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.796215] fff00000c6390280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.797586] ==================================================================
[ 12.875514] ================================================================== [ 12.876328] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.876774] Read of size 1 at addr ffff8881025742e8 by task kunit_try_catch/201 [ 12.877369] [ 12.877741] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.877796] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.877808] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.877831] Call Trace: [ 12.877846] <TASK> [ 12.877907] dump_stack_lvl+0x73/0xb0 [ 12.877976] print_report+0xd1/0x650 [ 12.878000] ? __virt_addr_valid+0x1db/0x2d0 [ 12.878025] ? kmalloc_uaf+0x320/0x380 [ 12.878044] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.878067] ? kmalloc_uaf+0x320/0x380 [ 12.878086] kasan_report+0x141/0x180 [ 12.878108] ? kmalloc_uaf+0x320/0x380 [ 12.878132] __asan_report_load1_noabort+0x18/0x20 [ 12.878157] kmalloc_uaf+0x320/0x380 [ 12.878176] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.878196] ? __schedule+0x10cc/0x2b60 [ 12.878218] ? __pfx_read_tsc+0x10/0x10 [ 12.878240] ? ktime_get_ts64+0x86/0x230 [ 12.878266] kunit_try_run_case+0x1a5/0x480 [ 12.878293] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.878315] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.878339] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.878362] ? __kthread_parkme+0x82/0x180 [ 12.878383] ? preempt_count_sub+0x50/0x80 [ 12.878408] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.878431] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.878455] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.878479] kthread+0x337/0x6f0 [ 12.878498] ? trace_preempt_on+0x20/0xc0 [ 12.878521] ? __pfx_kthread+0x10/0x10 [ 12.878541] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.878563] ? calculate_sigpending+0x7b/0xa0 [ 12.878587] ? __pfx_kthread+0x10/0x10 [ 12.878607] ret_from_fork+0x116/0x1d0 [ 12.878625] ? __pfx_kthread+0x10/0x10 [ 12.878645] ret_from_fork_asm+0x1a/0x30 [ 12.878676] </TASK> [ 12.878687] [ 12.890489] Allocated by task 201: [ 12.890674] kasan_save_stack+0x45/0x70 [ 12.890869] kasan_save_track+0x18/0x40 [ 12.891410] kasan_save_alloc_info+0x3b/0x50 [ 12.891749] __kasan_kmalloc+0xb7/0xc0 [ 12.892160] __kmalloc_cache_noprof+0x189/0x420 [ 12.892545] kmalloc_uaf+0xaa/0x380 [ 12.892730] kunit_try_run_case+0x1a5/0x480 [ 12.892937] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.893428] kthread+0x337/0x6f0 [ 12.893589] ret_from_fork+0x116/0x1d0 [ 12.893759] ret_from_fork_asm+0x1a/0x30 [ 12.894233] [ 12.894357] Freed by task 201: [ 12.894639] kasan_save_stack+0x45/0x70 [ 12.895447] kasan_save_track+0x18/0x40 [ 12.895654] kasan_save_free_info+0x3f/0x60 [ 12.895849] __kasan_slab_free+0x56/0x70 [ 12.896373] kfree+0x222/0x3f0 [ 12.896656] kmalloc_uaf+0x12c/0x380 [ 12.897041] kunit_try_run_case+0x1a5/0x480 [ 12.897241] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.897473] kthread+0x337/0x6f0 [ 12.897633] ret_from_fork+0x116/0x1d0 [ 12.897814] ret_from_fork_asm+0x1a/0x30 [ 12.898486] [ 12.898586] The buggy address belongs to the object at ffff8881025742e0 [ 12.898586] which belongs to the cache kmalloc-16 of size 16 [ 12.899757] The buggy address is located 8 bytes inside of [ 12.899757] freed 16-byte region [ffff8881025742e0, ffff8881025742f0) [ 12.900806] [ 12.900905] The buggy address belongs to the physical page: [ 12.901669] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102574 [ 12.902346] flags: 0x200000000000000(node=0|zone=2) [ 12.902585] page_type: f5(slab) [ 12.902755] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.903492] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.904066] page dumped because: kasan: bad access detected [ 12.904455] [ 12.904557] Memory state around the buggy address: [ 12.904771] ffff888102574180: 00 03 fc fc fa fb fc fc 00 02 fc fc 00 05 fc fc [ 12.905699] ffff888102574200: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.906255] >ffff888102574280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.906556] ^ [ 12.906834] ffff888102574300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.907636] ffff888102574380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.908182] ==================================================================