Date
July 10, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.923310] ================================================================== [ 15.923453] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 15.923529] Read of size 16 at addr fff00000c5ff7a00 by task kunit_try_catch/168 [ 15.923618] [ 15.923669] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 15.923849] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.923888] Hardware name: linux,dummy-virt (DT) [ 15.923926] Call trace: [ 15.923963] show_stack+0x20/0x38 (C) [ 15.924203] dump_stack_lvl+0x8c/0xd0 [ 15.924275] print_report+0x118/0x608 [ 15.924333] kasan_report+0xdc/0x128 [ 15.924386] __asan_report_load16_noabort+0x20/0x30 [ 15.924470] kmalloc_uaf_16+0x3bc/0x438 [ 15.924527] kunit_try_run_case+0x170/0x3f0 [ 15.924583] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.924698] kthread+0x328/0x630 [ 15.924743] ret_from_fork+0x10/0x20 [ 15.924799] [ 15.924863] Allocated by task 168: [ 15.924901] kasan_save_stack+0x3c/0x68 [ 15.924947] kasan_save_track+0x20/0x40 [ 15.924985] kasan_save_alloc_info+0x40/0x58 [ 15.925031] __kasan_kmalloc+0xd4/0xd8 [ 15.925067] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.925313] kmalloc_uaf_16+0x140/0x438 [ 15.925378] kunit_try_run_case+0x170/0x3f0 [ 15.925421] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.925496] kthread+0x328/0x630 [ 15.925548] ret_from_fork+0x10/0x20 [ 15.925583] [ 15.925601] Freed by task 168: [ 15.925627] kasan_save_stack+0x3c/0x68 [ 15.925714] kasan_save_track+0x20/0x40 [ 15.925777] kasan_save_free_info+0x4c/0x78 [ 15.925847] __kasan_slab_free+0x6c/0x98 [ 15.926134] kfree+0x214/0x3c8 [ 15.926187] kmalloc_uaf_16+0x190/0x438 [ 15.926315] kunit_try_run_case+0x170/0x3f0 [ 15.926392] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.926483] kthread+0x328/0x630 [ 15.926545] ret_from_fork+0x10/0x20 [ 15.926593] [ 15.926644] The buggy address belongs to the object at fff00000c5ff7a00 [ 15.926644] which belongs to the cache kmalloc-16 of size 16 [ 15.926820] The buggy address is located 0 bytes inside of [ 15.926820] freed 16-byte region [fff00000c5ff7a00, fff00000c5ff7a10) [ 15.926885] [ 15.926992] The buggy address belongs to the physical page: [ 15.927052] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105ff7 [ 15.927203] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.927282] page_type: f5(slab) [ 15.927416] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.927492] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.927611] page dumped because: kasan: bad access detected [ 15.927687] [ 15.927723] Memory state around the buggy address: [ 15.927754] fff00000c5ff7900: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 15.928064] fff00000c5ff7980: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 15.928222] >fff00000c5ff7a00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.928303] ^ [ 15.928392] fff00000c5ff7a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.928442] fff00000c5ff7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.928521] ==================================================================
[ 12.728899] ================================================================== [ 12.729312] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.729663] Read of size 16 at addr ffff888102749d80 by task kunit_try_catch/185 [ 12.729954] [ 12.730040] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.730078] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.730090] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.730109] Call Trace: [ 12.730119] <TASK> [ 12.730133] dump_stack_lvl+0x73/0xb0 [ 12.730162] print_report+0xd1/0x650 [ 12.730184] ? __virt_addr_valid+0x1db/0x2d0 [ 12.730206] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.730226] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.730248] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.730269] kasan_report+0x141/0x180 [ 12.730290] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.730315] __asan_report_load16_noabort+0x18/0x20 [ 12.730340] kmalloc_uaf_16+0x47b/0x4c0 [ 12.730370] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.730392] ? __schedule+0x10cc/0x2b60 [ 12.730413] ? __pfx_read_tsc+0x10/0x10 [ 12.730433] ? ktime_get_ts64+0x86/0x230 [ 12.730456] kunit_try_run_case+0x1a5/0x480 [ 12.730567] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.730593] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.730617] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.730640] ? __kthread_parkme+0x82/0x180 [ 12.730661] ? preempt_count_sub+0x50/0x80 [ 12.730684] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.730708] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.730733] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.730758] kthread+0x337/0x6f0 [ 12.730776] ? trace_preempt_on+0x20/0xc0 [ 12.730799] ? __pfx_kthread+0x10/0x10 [ 12.730819] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.730841] ? calculate_sigpending+0x7b/0xa0 [ 12.730864] ? __pfx_kthread+0x10/0x10 [ 12.730886] ret_from_fork+0x116/0x1d0 [ 12.730904] ? __pfx_kthread+0x10/0x10 [ 12.730924] ret_from_fork_asm+0x1a/0x30 [ 12.730954] </TASK> [ 12.730964] [ 12.737879] Allocated by task 185: [ 12.738030] kasan_save_stack+0x45/0x70 [ 12.738173] kasan_save_track+0x18/0x40 [ 12.738307] kasan_save_alloc_info+0x3b/0x50 [ 12.738745] __kasan_kmalloc+0xb7/0xc0 [ 12.738945] __kmalloc_cache_noprof+0x189/0x420 [ 12.739169] kmalloc_uaf_16+0x15b/0x4c0 [ 12.739384] kunit_try_run_case+0x1a5/0x480 [ 12.739601] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.739801] kthread+0x337/0x6f0 [ 12.739971] ret_from_fork+0x116/0x1d0 [ 12.740156] ret_from_fork_asm+0x1a/0x30 [ 12.740421] [ 12.740505] Freed by task 185: [ 12.740659] kasan_save_stack+0x45/0x70 [ 12.740801] kasan_save_track+0x18/0x40 [ 12.740988] kasan_save_free_info+0x3f/0x60 [ 12.741193] __kasan_slab_free+0x56/0x70 [ 12.741453] kfree+0x222/0x3f0 [ 12.741594] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.741747] kunit_try_run_case+0x1a5/0x480 [ 12.741951] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.742124] kthread+0x337/0x6f0 [ 12.742244] ret_from_fork+0x116/0x1d0 [ 12.742386] ret_from_fork_asm+0x1a/0x30 [ 12.742524] [ 12.742592] The buggy address belongs to the object at ffff888102749d80 [ 12.742592] which belongs to the cache kmalloc-16 of size 16 [ 12.743138] The buggy address is located 0 bytes inside of [ 12.743138] freed 16-byte region [ffff888102749d80, ffff888102749d90) [ 12.743987] [ 12.744085] The buggy address belongs to the physical page: [ 12.744314] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102749 [ 12.744807] flags: 0x200000000000000(node=0|zone=2) [ 12.744973] page_type: f5(slab) [ 12.745092] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.745411] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.745760] page dumped because: kasan: bad access detected [ 12.746010] [ 12.746101] Memory state around the buggy address: [ 12.746318] ffff888102749c80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.747080] ffff888102749d00: 00 05 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 12.747389] >ffff888102749d80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.747735] ^ [ 12.747896] ffff888102749e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.748170] ffff888102749e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.748503] ==================================================================