Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.463613] ================================================================== [ 19.463776] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.464881] Read of size 1 at addr fff00000c63971a8 by task kunit_try_catch/193 [ 19.465134] [ 19.465233] CPU: 0 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 19.465468] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.465540] Hardware name: linux,dummy-virt (DT) [ 19.465620] Call trace: [ 19.465674] show_stack+0x20/0x38 (C) [ 19.465785] dump_stack_lvl+0x8c/0xd0 [ 19.465913] print_report+0x118/0x608 [ 19.466011] kasan_report+0xdc/0x128 [ 19.466113] __asan_report_load1_noabort+0x20/0x30 [ 19.466243] kmalloc_uaf+0x300/0x338 [ 19.466382] kunit_try_run_case+0x170/0x3f0 [ 19.466519] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.466682] kthread+0x328/0x630 [ 19.466788] ret_from_fork+0x10/0x20 [ 19.466920] [ 19.466979] Allocated by task 193: [ 19.467083] kasan_save_stack+0x3c/0x68 [ 19.467177] kasan_save_track+0x20/0x40 [ 19.467269] kasan_save_alloc_info+0x40/0x58 [ 19.467387] __kasan_kmalloc+0xd4/0xd8 [ 19.467471] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.467569] kmalloc_uaf+0xb8/0x338 [ 19.467655] kunit_try_run_case+0x170/0x3f0 [ 19.467776] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.467929] kthread+0x328/0x630 [ 19.468032] ret_from_fork+0x10/0x20 [ 19.468146] [ 19.468210] Freed by task 193: [ 19.468308] kasan_save_stack+0x3c/0x68 [ 19.468425] kasan_save_track+0x20/0x40 [ 19.468530] kasan_save_free_info+0x4c/0x78 [ 19.468617] __kasan_slab_free+0x6c/0x98 [ 19.468740] kfree+0x214/0x3c8 [ 19.468820] kmalloc_uaf+0x11c/0x338 [ 19.468903] kunit_try_run_case+0x170/0x3f0 [ 19.469025] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.469137] kthread+0x328/0x630 [ 19.469221] ret_from_fork+0x10/0x20 [ 19.469373] [ 19.469470] The buggy address belongs to the object at fff00000c63971a0 [ 19.469470] which belongs to the cache kmalloc-16 of size 16 [ 19.469682] The buggy address is located 8 bytes inside of [ 19.469682] freed 16-byte region [fff00000c63971a0, fff00000c63971b0) [ 19.469848] [ 19.469896] The buggy address belongs to the physical page: [ 19.470224] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106397 [ 19.470459] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.470722] page_type: f5(slab) [ 19.470905] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.471126] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.471276] page dumped because: kasan: bad access detected [ 19.471364] [ 19.471413] Memory state around the buggy address: [ 19.471496] fff00000c6397080: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 19.472193] fff00000c6397100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.472365] >fff00000c6397180: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 19.472672] ^ [ 19.472770] fff00000c6397200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.473193] fff00000c6397280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.473613] ==================================================================
[ 11.695386] ================================================================== [ 11.696564] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.697152] Read of size 1 at addr ffff888102539488 by task kunit_try_catch/209 [ 11.697923] [ 11.698175] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 11.698223] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.698235] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.698256] Call Trace: [ 11.698268] <TASK> [ 11.698285] dump_stack_lvl+0x73/0xb0 [ 11.698314] print_report+0xd1/0x650 [ 11.698336] ? __virt_addr_valid+0x1db/0x2d0 [ 11.698358] ? kmalloc_uaf+0x320/0x380 [ 11.698397] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.698431] ? kmalloc_uaf+0x320/0x380 [ 11.698450] kasan_report+0x141/0x180 [ 11.698471] ? kmalloc_uaf+0x320/0x380 [ 11.698494] __asan_report_load1_noabort+0x18/0x20 [ 11.698517] kmalloc_uaf+0x320/0x380 [ 11.698536] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.698556] ? __schedule+0x10cc/0x2b60 [ 11.698577] ? __pfx_read_tsc+0x10/0x10 [ 11.698597] ? ktime_get_ts64+0x86/0x230 [ 11.698623] kunit_try_run_case+0x1a5/0x480 [ 11.698646] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.698667] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.698688] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.698709] ? __kthread_parkme+0x82/0x180 [ 11.698730] ? preempt_count_sub+0x50/0x80 [ 11.698754] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.698777] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.698799] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.698820] kthread+0x337/0x6f0 [ 11.698839] ? trace_preempt_on+0x20/0xc0 [ 11.698863] ? __pfx_kthread+0x10/0x10 [ 11.698885] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.698904] ? calculate_sigpending+0x7b/0xa0 [ 11.698928] ? __pfx_kthread+0x10/0x10 [ 11.698958] ret_from_fork+0x116/0x1d0 [ 11.698976] ? __pfx_kthread+0x10/0x10 [ 11.698996] ret_from_fork_asm+0x1a/0x30 [ 11.699026] </TASK> [ 11.699036] [ 11.710903] Allocated by task 209: [ 11.711044] kasan_save_stack+0x45/0x70 [ 11.711183] kasan_save_track+0x18/0x40 [ 11.711310] kasan_save_alloc_info+0x3b/0x50 [ 11.711468] __kasan_kmalloc+0xb7/0xc0 [ 11.711593] __kmalloc_cache_noprof+0x189/0x420 [ 11.711885] kmalloc_uaf+0xaa/0x380 [ 11.712020] kunit_try_run_case+0x1a5/0x480 [ 11.712219] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.712461] kthread+0x337/0x6f0 [ 11.712605] ret_from_fork+0x116/0x1d0 [ 11.712731] ret_from_fork_asm+0x1a/0x30 [ 11.712899] [ 11.712998] Freed by task 209: [ 11.713148] kasan_save_stack+0x45/0x70 [ 11.713334] kasan_save_track+0x18/0x40 [ 11.713608] kasan_save_free_info+0x3f/0x60 [ 11.713767] __kasan_slab_free+0x56/0x70 [ 11.713898] kfree+0x222/0x3f0 [ 11.714095] kmalloc_uaf+0x12c/0x380 [ 11.714387] kunit_try_run_case+0x1a5/0x480 [ 11.714606] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.714822] kthread+0x337/0x6f0 [ 11.714947] ret_from_fork+0x116/0x1d0 [ 11.715073] ret_from_fork_asm+0x1a/0x30 [ 11.715233] [ 11.715350] The buggy address belongs to the object at ffff888102539480 [ 11.715350] which belongs to the cache kmalloc-16 of size 16 [ 11.715948] The buggy address is located 8 bytes inside of [ 11.715948] freed 16-byte region [ffff888102539480, ffff888102539490) [ 11.716287] [ 11.716385] The buggy address belongs to the physical page: [ 11.716634] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102539 [ 11.717221] flags: 0x200000000000000(node=0|zone=2) [ 11.717516] page_type: f5(slab) [ 11.717779] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 11.718098] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.718318] page dumped because: kasan: bad access detected [ 11.718717] [ 11.718825] Memory state around the buggy address: [ 11.719130] ffff888102539380: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.719341] ffff888102539400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 11.719757] >ffff888102539480: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.720437] ^ [ 11.720625] ffff888102539500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.720979] ffff888102539580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.721776] ==================================================================