Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.441994] ================================================================== [ 29.442111] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 29.442187] Read of size 1 at addr fff00000c592c908 by task kunit_try_catch/216 [ 29.442273] [ 29.442318] CPU: 0 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 29.442405] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.442432] Hardware name: linux,dummy-virt (DT) [ 29.442463] Call trace: [ 29.442484] show_stack+0x20/0x38 (C) [ 29.442681] dump_stack_lvl+0x8c/0xd0 [ 29.442768] print_report+0x118/0x5d0 [ 29.442812] kasan_report+0xdc/0x128 [ 29.442860] __asan_report_load1_noabort+0x20/0x30 [ 29.442934] kmalloc_uaf+0x300/0x338 [ 29.442979] kunit_try_run_case+0x170/0x3f0 [ 29.443132] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.443226] kthread+0x328/0x630 [ 29.443275] ret_from_fork+0x10/0x20 [ 29.443329] [ 29.443388] Allocated by task 216: [ 29.443416] kasan_save_stack+0x3c/0x68 [ 29.443458] kasan_save_track+0x20/0x40 [ 29.443495] kasan_save_alloc_info+0x40/0x58 [ 29.443533] __kasan_kmalloc+0xd4/0xd8 [ 29.443571] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.443610] kmalloc_uaf+0xb8/0x338 [ 29.443646] kunit_try_run_case+0x170/0x3f0 [ 29.443860] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.443918] kthread+0x328/0x630 [ 29.443964] ret_from_fork+0x10/0x20 [ 29.444006] [ 29.444024] Freed by task 216: [ 29.444061] kasan_save_stack+0x3c/0x68 [ 29.444232] kasan_save_track+0x20/0x40 [ 29.444273] kasan_save_free_info+0x4c/0x78 [ 29.444364] __kasan_slab_free+0x6c/0x98 [ 29.444506] kfree+0x214/0x3c8 [ 29.444585] kmalloc_uaf+0x11c/0x338 [ 29.444693] kunit_try_run_case+0x170/0x3f0 [ 29.444776] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.444871] kthread+0x328/0x630 [ 29.444928] ret_from_fork+0x10/0x20 [ 29.445019] [ 29.445141] The buggy address belongs to the object at fff00000c592c900 [ 29.445141] which belongs to the cache kmalloc-16 of size 16 [ 29.445258] The buggy address is located 8 bytes inside of [ 29.445258] freed 16-byte region [fff00000c592c900, fff00000c592c910) [ 29.445354] [ 29.445415] The buggy address belongs to the physical page: [ 29.445462] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10592c [ 29.445569] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.445638] page_type: f5(slab) [ 29.445713] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 29.445764] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 29.445804] page dumped because: kasan: bad access detected [ 29.446022] [ 29.446134] Memory state around the buggy address: [ 29.446223] fff00000c592c800: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 29.446338] fff00000c592c880: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 29.446461] >fff00000c592c900: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.446498] ^ [ 29.446727] fff00000c592c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.446874] fff00000c592ca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.446963] ==================================================================
[ 24.330062] ================================================================== [ 24.330606] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 24.331396] Read of size 1 at addr ffff8881058a8208 by task kunit_try_catch/234 [ 24.331831] [ 24.332118] CPU: 0 UID: 0 PID: 234 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 24.332184] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 24.332339] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.332369] Call Trace: [ 24.332385] <TASK> [ 24.332409] dump_stack_lvl+0x73/0xb0 [ 24.332446] print_report+0xd1/0x610 [ 24.332470] ? __virt_addr_valid+0x1db/0x2d0 [ 24.332496] ? kmalloc_uaf+0x320/0x380 [ 24.332515] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.332540] ? kmalloc_uaf+0x320/0x380 [ 24.332560] kasan_report+0x141/0x180 [ 24.332581] ? kmalloc_uaf+0x320/0x380 [ 24.332605] __asan_report_load1_noabort+0x18/0x20 [ 24.332628] kmalloc_uaf+0x320/0x380 [ 24.332647] ? __pfx_kmalloc_uaf+0x10/0x10 [ 24.332667] ? __schedule+0x10cc/0x2b60 [ 24.332691] ? __pfx_read_tsc+0x10/0x10 [ 24.332729] ? ktime_get_ts64+0x86/0x230 [ 24.332757] kunit_try_run_case+0x1a5/0x480 [ 24.332797] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.332819] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.332842] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.332866] ? __kthread_parkme+0x82/0x180 [ 24.332900] ? preempt_count_sub+0x50/0x80 [ 24.332924] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.332944] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.332970] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.332994] kthread+0x337/0x6f0 [ 24.333013] ? trace_preempt_on+0x20/0xc0 [ 24.333037] ? __pfx_kthread+0x10/0x10 [ 24.333061] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.333084] ? calculate_sigpending+0x7b/0xa0 [ 24.333110] ? __pfx_kthread+0x10/0x10 [ 24.333131] ret_from_fork+0x116/0x1d0 [ 24.333150] ? __pfx_kthread+0x10/0x10 [ 24.333170] ret_from_fork_asm+0x1a/0x30 [ 24.333204] </TASK> [ 24.333217] [ 24.344303] Allocated by task 234: [ 24.344688] kasan_save_stack+0x45/0x70 [ 24.345225] kasan_save_track+0x18/0x40 [ 24.345534] kasan_save_alloc_info+0x3b/0x50 [ 24.345857] __kasan_kmalloc+0xb7/0xc0 [ 24.346147] __kmalloc_cache_noprof+0x189/0x420 [ 24.346476] kmalloc_uaf+0xaa/0x380 [ 24.346729] kunit_try_run_case+0x1a5/0x480 [ 24.347159] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.347499] kthread+0x337/0x6f0 [ 24.347659] ret_from_fork+0x116/0x1d0 [ 24.347829] ret_from_fork_asm+0x1a/0x30 [ 24.348375] [ 24.348466] Freed by task 234: [ 24.348597] kasan_save_stack+0x45/0x70 [ 24.349051] kasan_save_track+0x18/0x40 [ 24.349334] kasan_save_free_info+0x3f/0x60 [ 24.349648] __kasan_slab_free+0x56/0x70 [ 24.349860] kfree+0x222/0x3f0 [ 24.350411] kmalloc_uaf+0x12c/0x380 [ 24.350633] kunit_try_run_case+0x1a5/0x480 [ 24.350945] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.351394] kthread+0x337/0x6f0 [ 24.351574] ret_from_fork+0x116/0x1d0 [ 24.351978] ret_from_fork_asm+0x1a/0x30 [ 24.352303] [ 24.352406] The buggy address belongs to the object at ffff8881058a8200 [ 24.352406] which belongs to the cache kmalloc-16 of size 16 [ 24.353179] The buggy address is located 8 bytes inside of [ 24.353179] freed 16-byte region [ffff8881058a8200, ffff8881058a8210) [ 24.353849] [ 24.353994] The buggy address belongs to the physical page: [ 24.354324] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058a8 [ 24.354679] flags: 0x200000000000000(node=0|zone=2) [ 24.355308] page_type: f5(slab) [ 24.355463] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 24.356150] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.356462] page dumped because: kasan: bad access detected [ 24.356868] [ 24.356967] Memory state around the buggy address: [ 24.357359] ffff8881058a8100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.357755] ffff8881058a8180: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 24.358096] >ffff8881058a8200: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.358552] ^ [ 24.358754] ffff8881058a8280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.359303] ffff8881058a8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.359588] ==================================================================