Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 30.703332] ================================================================== [ 30.703519] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 30.703673] Read of size 1 at addr fff00000c4726d08 by task kunit_try_catch/195 [ 30.703793] [ 30.704419] CPU: 1 UID: 0 PID: 195 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT [ 30.705173] Tainted: [B]=BAD_PAGE, [N]=TEST [ 30.705257] Hardware name: linux,dummy-virt (DT) [ 30.705405] Call trace: [ 30.705491] show_stack+0x20/0x38 (C) [ 30.705864] dump_stack_lvl+0x8c/0xd0 [ 30.706016] print_report+0x118/0x608 [ 30.706263] kasan_report+0xdc/0x128 [ 30.706382] __asan_report_load1_noabort+0x20/0x30 [ 30.707018] kmalloc_uaf+0x300/0x338 [ 30.707275] kunit_try_run_case+0x170/0x3f0 [ 30.707512] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.707649] kthread+0x328/0x630 [ 30.707760] ret_from_fork+0x10/0x20 [ 30.707886] [ 30.707932] Allocated by task 195: [ 30.708394] kasan_save_stack+0x3c/0x68 [ 30.708784] kasan_save_track+0x20/0x40 [ 30.709057] kasan_save_alloc_info+0x40/0x58 [ 30.709510] __kasan_kmalloc+0xd4/0xd8 [ 30.710447] __kmalloc_cache_noprof+0x16c/0x3c0 [ 30.710631] kmalloc_uaf+0xb8/0x338 [ 30.710823] kunit_try_run_case+0x170/0x3f0 [ 30.711020] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.711353] kthread+0x328/0x630 [ 30.711453] ret_from_fork+0x10/0x20 [ 30.711551] [ 30.711647] Freed by task 195: [ 30.711801] kasan_save_stack+0x3c/0x68 [ 30.711994] kasan_save_track+0x20/0x40 [ 30.712092] kasan_save_free_info+0x4c/0x78 [ 30.712186] __kasan_slab_free+0x6c/0x98 [ 30.712312] kfree+0x214/0x3c8 [ 30.712436] kmalloc_uaf+0x11c/0x338 [ 30.713080] kunit_try_run_case+0x170/0x3f0 [ 30.713189] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.713376] kthread+0x328/0x630 [ 30.713460] ret_from_fork+0x10/0x20 [ 30.713666] [ 30.713766] The buggy address belongs to the object at fff00000c4726d00 [ 30.713766] which belongs to the cache kmalloc-16 of size 16 [ 30.714036] The buggy address is located 8 bytes inside of [ 30.714036] freed 16-byte region [fff00000c4726d00, fff00000c4726d10) [ 30.714301] [ 30.714370] The buggy address belongs to the physical page: [ 30.714441] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104726 [ 30.714552] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 30.714655] page_type: f5(slab) [ 30.714732] raw: 0bfffe0000000000 fff00000c0001640 dead000000000100 dead000000000122 [ 30.714838] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 30.715689] page dumped because: kasan: bad access detected [ 30.715866] [ 30.715954] Memory state around the buggy address: [ 30.716099] fff00000c4726c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 30.716263] fff00000c4726c80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 30.716431] >fff00000c4726d00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.716609] ^ [ 30.716691] fff00000c4726d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.716826] fff00000c4726e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.717015] ==================================================================
[ 27.201853] ================================================================== [ 27.202670] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 27.203282] Read of size 1 at addr ffff8881022a26a8 by task kunit_try_catch/213 [ 27.203718] [ 27.203904] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 27.204010] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.204034] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.204064] Call Trace: [ 27.204087] <TASK> [ 27.204959] dump_stack_lvl+0x73/0xb0 [ 27.205212] print_report+0xd1/0x650 [ 27.205258] ? __virt_addr_valid+0x1db/0x2d0 [ 27.205297] ? kmalloc_uaf+0x320/0x380 [ 27.205363] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.205396] ? kmalloc_uaf+0x320/0x380 [ 27.205418] kasan_report+0x141/0x180 [ 27.205442] ? kmalloc_uaf+0x320/0x380 [ 27.205467] __asan_report_load1_noabort+0x18/0x20 [ 27.205492] kmalloc_uaf+0x320/0x380 [ 27.205513] ? __pfx_kmalloc_uaf+0x10/0x10 [ 27.205535] ? __schedule+0x10cc/0x2b60 [ 27.205559] ? __pfx_read_tsc+0x10/0x10 [ 27.205581] ? ktime_get_ts64+0x86/0x230 [ 27.205608] kunit_try_run_case+0x1a5/0x480 [ 27.205635] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.205657] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.205681] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.205705] ? __kthread_parkme+0x82/0x180 [ 27.205727] ? preempt_count_sub+0x50/0x80 [ 27.205752] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.205776] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.205799] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.205823] kthread+0x337/0x6f0 [ 27.205843] ? trace_preempt_on+0x20/0xc0 [ 27.205867] ? __pfx_kthread+0x10/0x10 [ 27.205889] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.205918] ? calculate_sigpending+0x7b/0xa0 [ 27.206057] ? __pfx_kthread+0x10/0x10 [ 27.206080] ret_from_fork+0x116/0x1d0 [ 27.206114] ? __pfx_kthread+0x10/0x10 [ 27.206139] ret_from_fork_asm+0x1a/0x30 [ 27.206172] </TASK> [ 27.206186] [ 27.221799] Allocated by task 213: [ 27.222582] kasan_save_stack+0x45/0x70 [ 27.222888] kasan_save_track+0x18/0x40 [ 27.223464] kasan_save_alloc_info+0x3b/0x50 [ 27.224124] __kasan_kmalloc+0xb7/0xc0 [ 27.224324] __kmalloc_cache_noprof+0x189/0x420 [ 27.224728] kmalloc_uaf+0xaa/0x380 [ 27.224983] kunit_try_run_case+0x1a5/0x480 [ 27.225362] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.226304] kthread+0x337/0x6f0 [ 27.226649] ret_from_fork+0x116/0x1d0 [ 27.227542] ret_from_fork_asm+0x1a/0x30 [ 27.228234] [ 27.228459] Freed by task 213: [ 27.228745] kasan_save_stack+0x45/0x70 [ 27.229290] kasan_save_track+0x18/0x40 [ 27.229856] kasan_save_free_info+0x3f/0x60 [ 27.230381] __kasan_slab_free+0x56/0x70 [ 27.230899] kfree+0x222/0x3f0 [ 27.231477] kmalloc_uaf+0x12c/0x380 [ 27.231692] kunit_try_run_case+0x1a5/0x480 [ 27.232413] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.233238] kthread+0x337/0x6f0 [ 27.233868] ret_from_fork+0x116/0x1d0 [ 27.234058] ret_from_fork_asm+0x1a/0x30 [ 27.234465] [ 27.234643] The buggy address belongs to the object at ffff8881022a26a0 [ 27.234643] which belongs to the cache kmalloc-16 of size 16 [ 27.235830] The buggy address is located 8 bytes inside of [ 27.235830] freed 16-byte region [ffff8881022a26a0, ffff8881022a26b0) [ 27.236940] [ 27.237407] The buggy address belongs to the physical page: [ 27.237816] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022a2 [ 27.238666] flags: 0x200000000000000(node=0|zone=2) [ 27.239288] page_type: f5(slab) [ 27.239476] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122 [ 27.239977] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 27.240404] page dumped because: kasan: bad access detected [ 27.240751] [ 27.240883] Memory state around the buggy address: [ 27.241813] ffff8881022a2580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.242136] ffff8881022a2600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 27.242961] >ffff8881022a2680: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 27.243609] ^ [ 27.244275] ffff8881022a2700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.244930] ffff8881022a2780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.245735] ==================================================================