Date
June 18, 2025, 6:43 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.225430] ================================================================== [ 21.225614] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 21.225766] Read of size 1 at addr fff00000c0b94228 by task kunit_try_catch/198 [ 21.225893] [ 21.226879] CPU: 0 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc2-next-20250618 #1 PREEMPT [ 21.227698] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 21.227793] Hardware name: linux,dummy-virt (DT) [ 21.227939] Call trace: [ 21.227996] show_stack+0x20/0x38 (C) [ 21.228379] dump_stack_lvl+0x8c/0xd0 [ 21.229468] print_report+0x118/0x608 [ 21.230053] kasan_report+0xdc/0x128 [ 21.230472] __asan_report_load1_noabort+0x20/0x30 [ 21.230911] kmalloc_uaf2+0x3f4/0x468 [ 21.231107] kunit_try_run_case+0x170/0x3f0 [ 21.231438] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.231712] kthread+0x328/0x630 [ 21.231872] ret_from_fork+0x10/0x20 [ 21.232003] [ 21.232058] Allocated by task 198: [ 21.232134] kasan_save_stack+0x3c/0x68 [ 21.232505] kasan_save_track+0x20/0x40 [ 21.232854] kasan_save_alloc_info+0x40/0x58 [ 21.233505] __kasan_kmalloc+0xd4/0xd8 [ 21.234001] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.234250] kmalloc_uaf2+0xc4/0x468 [ 21.234388] kunit_try_run_case+0x170/0x3f0 [ 21.235094] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.235267] kthread+0x328/0x630 [ 21.235516] ret_from_fork+0x10/0x20 [ 21.235613] [ 21.235656] Freed by task 198: [ 21.235721] kasan_save_stack+0x3c/0x68 [ 21.235807] kasan_save_track+0x20/0x40 [ 21.236748] kasan_save_free_info+0x4c/0x78 [ 21.237123] __kasan_slab_free+0x6c/0x98 [ 21.237740] kfree+0x214/0x3c8 [ 21.237959] kmalloc_uaf2+0x134/0x468 [ 21.238310] kunit_try_run_case+0x170/0x3f0 [ 21.238420] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.238726] kthread+0x328/0x630 [ 21.238961] ret_from_fork+0x10/0x20 [ 21.239459] [ 21.239572] The buggy address belongs to the object at fff00000c0b94200 [ 21.239572] which belongs to the cache kmalloc-64 of size 64 [ 21.239919] The buggy address is located 40 bytes inside of [ 21.239919] freed 64-byte region [fff00000c0b94200, fff00000c0b94240) [ 21.240366] [ 21.240571] The buggy address belongs to the physical page: [ 21.240657] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100b94 [ 21.241537] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.242053] page_type: f5(slab) [ 21.242163] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 21.242269] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 21.242330] page dumped because: kasan: bad access detected [ 21.242363] [ 21.242381] Memory state around the buggy address: [ 21.242420] fff00000c0b94100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.242465] fff00000c0b94180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.242509] >fff00000c0b94200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.242547] ^ [ 21.242581] fff00000c0b94280: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 21.242624] fff00000c0b94300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.242663] ==================================================================
[ 11.436890] ================================================================== [ 11.437703] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.437971] Read of size 1 at addr ffff88810387b4a8 by task kunit_try_catch/214 [ 11.438283] [ 11.438393] CPU: 1 UID: 0 PID: 214 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT(voluntary) [ 11.438450] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.438462] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.438481] Call Trace: [ 11.438493] <TASK> [ 11.438507] dump_stack_lvl+0x73/0xb0 [ 11.438535] print_report+0xd1/0x650 [ 11.438565] ? __virt_addr_valid+0x1db/0x2d0 [ 11.438587] ? kmalloc_uaf2+0x4a8/0x520 [ 11.438605] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.438700] ? kmalloc_uaf2+0x4a8/0x520 [ 11.438736] kasan_report+0x141/0x180 [ 11.438765] ? kmalloc_uaf2+0x4a8/0x520 [ 11.438788] __asan_report_load1_noabort+0x18/0x20 [ 11.438810] kmalloc_uaf2+0x4a8/0x520 [ 11.438839] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.438857] ? finish_task_switch.isra.0+0x153/0x700 [ 11.438878] ? __switch_to+0x47/0xf50 [ 11.438903] ? __schedule+0x10cc/0x2b60 [ 11.438924] ? __pfx_read_tsc+0x10/0x10 [ 11.438944] ? ktime_get_ts64+0x86/0x230 [ 11.438968] kunit_try_run_case+0x1a5/0x480 [ 11.438990] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.439011] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.439033] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.439053] ? __kthread_parkme+0x82/0x180 [ 11.439072] ? preempt_count_sub+0x50/0x80 [ 11.439093] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.439124] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.439145] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.439166] kthread+0x337/0x6f0 [ 11.439194] ? trace_preempt_on+0x20/0xc0 [ 11.439232] ? __pfx_kthread+0x10/0x10 [ 11.439252] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.439271] ? calculate_sigpending+0x7b/0xa0 [ 11.439304] ? __pfx_kthread+0x10/0x10 [ 11.439324] ret_from_fork+0x116/0x1d0 [ 11.439341] ? __pfx_kthread+0x10/0x10 [ 11.439368] ret_from_fork_asm+0x1a/0x30 [ 11.439396] </TASK> [ 11.439407] [ 11.447199] Allocated by task 214: [ 11.447382] kasan_save_stack+0x45/0x70 [ 11.447730] kasan_save_track+0x18/0x40 [ 11.447942] kasan_save_alloc_info+0x3b/0x50 [ 11.448111] __kasan_kmalloc+0xb7/0xc0 [ 11.448245] __kmalloc_cache_noprof+0x189/0x420 [ 11.448409] kmalloc_uaf2+0xc6/0x520 [ 11.448579] kunit_try_run_case+0x1a5/0x480 [ 11.448991] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.449300] kthread+0x337/0x6f0 [ 11.449463] ret_from_fork+0x116/0x1d0 [ 11.449696] ret_from_fork_asm+0x1a/0x30 [ 11.449898] [ 11.449962] Freed by task 214: [ 11.450063] kasan_save_stack+0x45/0x70 [ 11.450292] kasan_save_track+0x18/0x40 [ 11.450666] kasan_save_free_info+0x3f/0x60 [ 11.450873] __kasan_slab_free+0x56/0x70 [ 11.451086] kfree+0x222/0x3f0 [ 11.451243] kmalloc_uaf2+0x14c/0x520 [ 11.451414] kunit_try_run_case+0x1a5/0x480 [ 11.451677] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.451945] kthread+0x337/0x6f0 [ 11.452104] ret_from_fork+0x116/0x1d0 [ 11.452285] ret_from_fork_asm+0x1a/0x30 [ 11.452697] [ 11.452795] The buggy address belongs to the object at ffff88810387b480 [ 11.452795] which belongs to the cache kmalloc-64 of size 64 [ 11.453335] The buggy address is located 40 bytes inside of [ 11.453335] freed 64-byte region [ffff88810387b480, ffff88810387b4c0) [ 11.453923] [ 11.453994] The buggy address belongs to the physical page: [ 11.454161] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10387b [ 11.454406] flags: 0x200000000000000(node=0|zone=2) [ 11.454584] page_type: f5(slab) [ 11.454818] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.455146] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.455597] page dumped because: kasan: bad access detected [ 11.455758] [ 11.455818] Memory state around the buggy address: [ 11.455963] ffff88810387b380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.456350] ffff88810387b400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.456669] >ffff88810387b480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.457143] ^ [ 11.457464] ffff88810387b500: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.457915] ffff88810387b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.458237] ==================================================================