Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.921270] ================================================================== [ 21.921472] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 21.921634] Read of size 1 at addr fff00000c5e38b28 by task kunit_try_catch/188 [ 21.921761] [ 21.921856] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 21.922075] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.922148] Hardware name: linux,dummy-virt (DT) [ 21.922888] Call trace: [ 21.923066] show_stack+0x20/0x38 (C) [ 21.923232] dump_stack_lvl+0x8c/0xd0 [ 21.923366] print_report+0x118/0x608 [ 21.923503] kasan_report+0xdc/0x128 [ 21.923604] __asan_report_load1_noabort+0x20/0x30 [ 21.923701] kmalloc_uaf2+0x3f4/0x468 [ 21.923801] kunit_try_run_case+0x170/0x3f0 [ 21.923975] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.924647] kthread+0x328/0x630 [ 21.925029] ret_from_fork+0x10/0x20 [ 21.925284] [ 21.925331] Allocated by task 188: [ 21.925795] kasan_save_stack+0x3c/0x68 [ 21.926079] kasan_save_track+0x20/0x40 [ 21.926195] kasan_save_alloc_info+0x40/0x58 [ 21.926389] __kasan_kmalloc+0xd4/0xd8 [ 21.926606] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.926716] kmalloc_uaf2+0xc4/0x468 [ 21.927067] kunit_try_run_case+0x170/0x3f0 [ 21.927210] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.927349] kthread+0x328/0x630 [ 21.927445] ret_from_fork+0x10/0x20 [ 21.927535] [ 21.927586] Freed by task 188: [ 21.927662] kasan_save_stack+0x3c/0x68 [ 21.927995] kasan_save_track+0x20/0x40 [ 21.928215] kasan_save_free_info+0x4c/0x78 [ 21.928329] __kasan_slab_free+0x6c/0x98 [ 21.928949] kfree+0x214/0x3c8 [ 21.929140] kmalloc_uaf2+0x134/0x468 [ 21.929328] kunit_try_run_case+0x170/0x3f0 [ 21.929454] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.929561] kthread+0x328/0x630 [ 21.929985] ret_from_fork+0x10/0x20 [ 21.930215] [ 21.930670] The buggy address belongs to the object at fff00000c5e38b00 [ 21.930670] which belongs to the cache kmalloc-64 of size 64 [ 21.930907] The buggy address is located 40 bytes inside of [ 21.930907] freed 64-byte region [fff00000c5e38b00, fff00000c5e38b40) [ 21.931162] [ 21.931365] The buggy address belongs to the physical page: [ 21.931534] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105e38 [ 21.931686] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.931791] page_type: f5(slab) [ 21.931871] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 21.931979] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 21.932079] page dumped because: kasan: bad access detected [ 21.932428] [ 21.932766] Memory state around the buggy address: [ 21.932872] fff00000c5e38a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.933083] fff00000c5e38a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.933291] >fff00000c5e38b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 21.933408] ^ [ 21.933728] fff00000c5e38b80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 21.934066] fff00000c5e38c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.934270] ==================================================================
[ 11.163033] ================================================================== [ 11.163452] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 11.163712] Read of size 1 at addr ffff888102f991a8 by task kunit_try_catch/205 [ 11.164371] [ 11.164636] CPU: 0 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 11.164685] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.164697] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.164736] Call Trace: [ 11.164747] <TASK> [ 11.164762] dump_stack_lvl+0x73/0xb0 [ 11.164789] print_report+0xd1/0x650 [ 11.164811] ? __virt_addr_valid+0x1db/0x2d0 [ 11.164833] ? kmalloc_uaf2+0x4a8/0x520 [ 11.164878] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.164901] ? kmalloc_uaf2+0x4a8/0x520 [ 11.164922] kasan_report+0x141/0x180 [ 11.164955] ? kmalloc_uaf2+0x4a8/0x520 [ 11.164980] __asan_report_load1_noabort+0x18/0x20 [ 11.165009] kmalloc_uaf2+0x4a8/0x520 [ 11.165043] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.165063] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 11.165093] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 11.165118] kunit_try_run_case+0x1a5/0x480 [ 11.165139] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.165158] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.165183] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.165206] ? __kthread_parkme+0x82/0x180 [ 11.165227] ? preempt_count_sub+0x50/0x80 [ 11.165249] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.165270] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.165293] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.165317] kthread+0x337/0x6f0 [ 11.165336] ? trace_preempt_on+0x20/0xc0 [ 11.165359] ? __pfx_kthread+0x10/0x10 [ 11.165380] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.165402] ? calculate_sigpending+0x7b/0xa0 [ 11.165425] ? __pfx_kthread+0x10/0x10 [ 11.165446] ret_from_fork+0x116/0x1d0 [ 11.165464] ? __pfx_kthread+0x10/0x10 [ 11.165484] ret_from_fork_asm+0x1a/0x30 [ 11.165514] </TASK> [ 11.165524] [ 11.176468] Allocated by task 205: [ 11.176667] kasan_save_stack+0x45/0x70 [ 11.177143] kasan_save_track+0x18/0x40 [ 11.177333] kasan_save_alloc_info+0x3b/0x50 [ 11.177520] __kasan_kmalloc+0xb7/0xc0 [ 11.177726] __kmalloc_cache_noprof+0x189/0x420 [ 11.177911] kmalloc_uaf2+0xc6/0x520 [ 11.178244] kunit_try_run_case+0x1a5/0x480 [ 11.178526] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.178845] kthread+0x337/0x6f0 [ 11.179151] ret_from_fork+0x116/0x1d0 [ 11.179345] ret_from_fork_asm+0x1a/0x30 [ 11.179547] [ 11.179847] Freed by task 205: [ 11.180087] kasan_save_stack+0x45/0x70 [ 11.180394] kasan_save_track+0x18/0x40 [ 11.180589] kasan_save_free_info+0x3f/0x60 [ 11.180945] __kasan_slab_free+0x56/0x70 [ 11.181162] kfree+0x222/0x3f0 [ 11.181329] kmalloc_uaf2+0x14c/0x520 [ 11.181580] kunit_try_run_case+0x1a5/0x480 [ 11.181834] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.182205] kthread+0x337/0x6f0 [ 11.182344] ret_from_fork+0x116/0x1d0 [ 11.182545] ret_from_fork_asm+0x1a/0x30 [ 11.182756] [ 11.183076] The buggy address belongs to the object at ffff888102f99180 [ 11.183076] which belongs to the cache kmalloc-64 of size 64 [ 11.183531] The buggy address is located 40 bytes inside of [ 11.183531] freed 64-byte region [ffff888102f99180, ffff888102f991c0) [ 11.184121] [ 11.184367] The buggy address belongs to the physical page: [ 11.184630] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102f99 [ 11.185118] flags: 0x200000000000000(node=0|zone=2) [ 11.185424] page_type: f5(slab) [ 11.185729] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.186193] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.186490] page dumped because: kasan: bad access detected [ 11.186732] [ 11.187113] Memory state around the buggy address: [ 11.187418] ffff888102f99080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.187714] ffff888102f99100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.188401] >ffff888102f99180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.188748] ^ [ 11.189058] ffff888102f99200: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 11.189423] ffff888102f99280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.189816] ==================================================================