Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.952994] ================================================================== [ 21.953235] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 21.953463] Read of size 1 at addr fff00000c58ac288 by task kunit_try_catch/186 [ 21.953567] [ 21.953794] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 21.953949] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.953981] Hardware name: linux,dummy-virt (DT) [ 21.954021] Call trace: [ 21.954073] show_stack+0x20/0x38 (C) [ 21.954150] dump_stack_lvl+0x8c/0xd0 [ 21.954203] print_report+0x118/0x608 [ 21.954253] kasan_report+0xdc/0x128 [ 21.954300] __asan_report_load1_noabort+0x20/0x30 [ 21.954353] kmalloc_uaf+0x300/0x338 [ 21.954402] kunit_try_run_case+0x170/0x3f0 [ 21.954456] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.954513] kthread+0x328/0x630 [ 21.954563] ret_from_fork+0x10/0x20 [ 21.954617] [ 21.954638] Allocated by task 186: [ 21.954670] kasan_save_stack+0x3c/0x68 [ 21.954716] kasan_save_track+0x20/0x40 [ 21.954780] kasan_save_alloc_info+0x40/0x58 [ 21.954823] __kasan_kmalloc+0xd4/0xd8 [ 21.954861] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.954907] kmalloc_uaf+0xb8/0x338 [ 21.954946] kunit_try_run_case+0x170/0x3f0 [ 21.954987] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.955034] kthread+0x328/0x630 [ 21.955072] ret_from_fork+0x10/0x20 [ 21.955110] [ 21.955132] Freed by task 186: [ 21.955161] kasan_save_stack+0x3c/0x68 [ 21.955200] kasan_save_track+0x20/0x40 [ 21.955238] kasan_save_free_info+0x4c/0x78 [ 21.955279] __kasan_slab_free+0x6c/0x98 [ 21.955317] kfree+0x214/0x3c8 [ 21.955351] kmalloc_uaf+0x11c/0x338 [ 21.955390] kunit_try_run_case+0x170/0x3f0 [ 21.955431] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.955477] kthread+0x328/0x630 [ 21.955515] ret_from_fork+0x10/0x20 [ 21.955553] [ 21.955575] The buggy address belongs to the object at fff00000c58ac280 [ 21.955575] which belongs to the cache kmalloc-16 of size 16 [ 21.955637] The buggy address is located 8 bytes inside of [ 21.955637] freed 16-byte region [fff00000c58ac280, fff00000c58ac290) [ 21.955701] [ 21.955724] The buggy address belongs to the physical page: [ 21.955818] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058ac [ 21.955926] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.956030] page_type: f5(slab) [ 21.956126] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 21.956340] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.956447] page dumped because: kasan: bad access detected [ 21.956490] [ 21.956511] Memory state around the buggy address: [ 21.956550] fff00000c58ac180: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.956598] fff00000c58ac200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.956642] >fff00000c58ac280: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.956681] ^ [ 21.956714] fff00000c58ac300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.956781] fff00000c58ac380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.956823] ==================================================================
[ 19.611524] ================================================================== [ 19.612461] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 19.613004] Read of size 1 at addr ffff8881026cd088 by task kunit_try_catch/204 [ 19.613665] [ 19.613883] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 19.614004] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.614112] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 19.614195] Call Trace: [ 19.614234] <TASK> [ 19.614282] dump_stack_lvl+0x73/0xb0 [ 19.614821] print_report+0xd1/0x650 [ 19.614861] ? __virt_addr_valid+0x1db/0x2d0 [ 19.614895] ? kmalloc_uaf+0x320/0x380 [ 19.614925] ? kasan_complete_mode_report_info+0x64/0x200 [ 19.615355] ? kmalloc_uaf+0x320/0x380 [ 19.615512] kasan_report+0x141/0x180 [ 19.615559] ? kmalloc_uaf+0x320/0x380 [ 19.615621] __asan_report_load1_noabort+0x18/0x20 [ 19.615687] kmalloc_uaf+0x320/0x380 [ 19.615722] ? __pfx_kmalloc_uaf+0x10/0x10 [ 19.615754] ? __schedule+0x10cc/0x2b60 [ 19.615788] ? __pfx_read_tsc+0x10/0x10 [ 19.615819] ? ktime_get_ts64+0x86/0x230 [ 19.615856] kunit_try_run_case+0x1a5/0x480 [ 19.615904] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.615936] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 19.616010] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 19.616146] ? __kthread_parkme+0x82/0x180 [ 19.616195] ? preempt_count_sub+0x50/0x80 [ 19.616232] ? __pfx_kunit_try_run_case+0x10/0x10 [ 19.616267] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.616326] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 19.616362] kthread+0x337/0x6f0 [ 19.616385] ? trace_preempt_on+0x20/0xc0 [ 19.616421] ? __pfx_kthread+0x10/0x10 [ 19.616445] ? _raw_spin_unlock_irq+0x47/0x80 [ 19.616475] ? calculate_sigpending+0x7b/0xa0 [ 19.616506] ? __pfx_kthread+0x10/0x10 [ 19.616530] ret_from_fork+0x41/0x80 [ 19.616561] ? __pfx_kthread+0x10/0x10 [ 19.616586] ret_from_fork_asm+0x1a/0x30 [ 19.616630] </TASK> [ 19.616645] [ 19.635576] Allocated by task 204: [ 19.636097] kasan_save_stack+0x45/0x70 [ 19.636566] kasan_save_track+0x18/0x40 [ 19.637084] kasan_save_alloc_info+0x3b/0x50 [ 19.638154] __kasan_kmalloc+0xb7/0xc0 [ 19.638689] __kmalloc_cache_noprof+0x189/0x420 [ 19.639671] kmalloc_uaf+0xaa/0x380 [ 19.640308] kunit_try_run_case+0x1a5/0x480 [ 19.640829] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.641211] kthread+0x337/0x6f0 [ 19.642095] ret_from_fork+0x41/0x80 [ 19.642829] ret_from_fork_asm+0x1a/0x30 [ 19.643490] [ 19.643677] Freed by task 204: [ 19.644480] kasan_save_stack+0x45/0x70 [ 19.644964] kasan_save_track+0x18/0x40 [ 19.645634] kasan_save_free_info+0x3f/0x60 [ 19.646008] __kasan_slab_free+0x56/0x70 [ 19.647246] kfree+0x222/0x3f0 [ 19.647537] kmalloc_uaf+0x12c/0x380 [ 19.647980] kunit_try_run_case+0x1a5/0x480 [ 19.648587] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.649369] kthread+0x337/0x6f0 [ 19.649788] ret_from_fork+0x41/0x80 [ 19.650860] ret_from_fork_asm+0x1a/0x30 [ 19.651541] [ 19.651916] The buggy address belongs to the object at ffff8881026cd080 [ 19.651916] which belongs to the cache kmalloc-16 of size 16 [ 19.653331] The buggy address is located 8 bytes inside of [ 19.653331] freed 16-byte region [ffff8881026cd080, ffff8881026cd090) [ 19.654687] [ 19.654789] The buggy address belongs to the physical page: [ 19.655340] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026cd [ 19.656183] flags: 0x200000000000000(node=0|zone=2) [ 19.656645] page_type: f5(slab) [ 19.657032] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 19.658485] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.659129] page dumped because: kasan: bad access detected [ 19.660021] [ 19.660553] Memory state around the buggy address: [ 19.660896] ffff8881026ccf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.661873] ffff8881026cd000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.663114] >ffff8881026cd080: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.663924] ^ [ 19.664525] ffff8881026cd100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.665103] ffff8881026cd180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.666640] ==================================================================