Date
July 8, 2025, 7:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.394882] ================================================================== [ 19.395001] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 19.395139] Read of size 1 at addr fff00000c564f368 by task kunit_try_catch/184 [ 19.395202] [ 19.395533] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.395867] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.395901] Hardware name: linux,dummy-virt (DT) [ 19.396217] Call trace: [ 19.396349] show_stack+0x20/0x38 (C) [ 19.396487] dump_stack_lvl+0x8c/0xd0 [ 19.396545] print_report+0x118/0x608 [ 19.396644] kasan_report+0xdc/0x128 [ 19.396784] __asan_report_load1_noabort+0x20/0x30 [ 19.397300] kmalloc_uaf+0x300/0x338 [ 19.397454] kunit_try_run_case+0x170/0x3f0 [ 19.397559] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.397752] kthread+0x328/0x630 [ 19.397905] ret_from_fork+0x10/0x20 [ 19.398204] [ 19.398288] Allocated by task 184: [ 19.398320] kasan_save_stack+0x3c/0x68 [ 19.398384] kasan_save_track+0x20/0x40 [ 19.398422] kasan_save_alloc_info+0x40/0x58 [ 19.398467] __kasan_kmalloc+0xd4/0xd8 [ 19.398516] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.398553] kmalloc_uaf+0xb8/0x338 [ 19.398586] kunit_try_run_case+0x170/0x3f0 [ 19.398622] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.398665] kthread+0x328/0x630 [ 19.398697] ret_from_fork+0x10/0x20 [ 19.398750] [ 19.398770] Freed by task 184: [ 19.398804] kasan_save_stack+0x3c/0x68 [ 19.398841] kasan_save_track+0x20/0x40 [ 19.398892] kasan_save_free_info+0x4c/0x78 [ 19.398931] __kasan_slab_free+0x6c/0x98 [ 19.398968] kfree+0x214/0x3c8 [ 19.399020] kmalloc_uaf+0x11c/0x338 [ 19.399064] kunit_try_run_case+0x170/0x3f0 [ 19.399101] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.399169] kthread+0x328/0x630 [ 19.399230] ret_from_fork+0x10/0x20 [ 19.399275] [ 19.399301] The buggy address belongs to the object at fff00000c564f360 [ 19.399301] which belongs to the cache kmalloc-16 of size 16 [ 19.399358] The buggy address is located 8 bytes inside of [ 19.399358] freed 16-byte region [fff00000c564f360, fff00000c564f370) [ 19.399418] [ 19.399438] The buggy address belongs to the physical page: [ 19.399469] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10564f [ 19.399695] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.400365] page_type: f5(slab) [ 19.400495] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.400626] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.400694] page dumped because: kasan: bad access detected [ 19.400848] [ 19.400899] Memory state around the buggy address: [ 19.401288] fff00000c564f200: fa fb fc fc fa fb fc fc 00 01 fc fc fa fb fc fc [ 19.401456] fff00000c564f280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.401538] >fff00000c564f300: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.401697] ^ [ 19.401760] fff00000c564f380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.401802] fff00000c564f400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.401998] ==================================================================
[ 13.167412] ================================================================== [ 13.168115] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 13.168767] Read of size 1 at addr ffff88810256a328 by task kunit_try_catch/201 [ 13.169283] [ 13.169467] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.169513] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.169524] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.169544] Call Trace: [ 13.169566] <TASK> [ 13.169581] dump_stack_lvl+0x73/0xb0 [ 13.169610] print_report+0xd1/0x650 [ 13.169631] ? __virt_addr_valid+0x1db/0x2d0 [ 13.169703] ? kmalloc_uaf+0x320/0x380 [ 13.169724] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.169760] ? kmalloc_uaf+0x320/0x380 [ 13.169780] kasan_report+0x141/0x180 [ 13.169800] ? kmalloc_uaf+0x320/0x380 [ 13.169825] __asan_report_load1_noabort+0x18/0x20 [ 13.169848] kmalloc_uaf+0x320/0x380 [ 13.169866] ? __pfx_kmalloc_uaf+0x10/0x10 [ 13.169886] ? __schedule+0x10cc/0x2b60 [ 13.169908] ? __pfx_read_tsc+0x10/0x10 [ 13.169928] ? ktime_get_ts64+0x86/0x230 [ 13.169951] kunit_try_run_case+0x1a5/0x480 [ 13.169973] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.169994] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.170016] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.170038] ? __kthread_parkme+0x82/0x180 [ 13.170068] ? preempt_count_sub+0x50/0x80 [ 13.170091] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.170114] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.170136] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.170158] kthread+0x337/0x6f0 [ 13.170176] ? trace_preempt_on+0x20/0xc0 [ 13.170197] ? __pfx_kthread+0x10/0x10 [ 13.170217] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.170237] ? calculate_sigpending+0x7b/0xa0 [ 13.170260] ? __pfx_kthread+0x10/0x10 [ 13.170281] ret_from_fork+0x116/0x1d0 [ 13.170298] ? __pfx_kthread+0x10/0x10 [ 13.170317] ret_from_fork_asm+0x1a/0x30 [ 13.170347] </TASK> [ 13.170358] [ 13.179684] Allocated by task 201: [ 13.179891] kasan_save_stack+0x45/0x70 [ 13.180057] kasan_save_track+0x18/0x40 [ 13.180201] kasan_save_alloc_info+0x3b/0x50 [ 13.180749] __kasan_kmalloc+0xb7/0xc0 [ 13.180975] __kmalloc_cache_noprof+0x189/0x420 [ 13.181198] kmalloc_uaf+0xaa/0x380 [ 13.181522] kunit_try_run_case+0x1a5/0x480 [ 13.181831] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.182206] kthread+0x337/0x6f0 [ 13.182498] ret_from_fork+0x116/0x1d0 [ 13.182660] ret_from_fork_asm+0x1a/0x30 [ 13.183018] [ 13.183252] Freed by task 201: [ 13.183396] kasan_save_stack+0x45/0x70 [ 13.183626] kasan_save_track+0x18/0x40 [ 13.183916] kasan_save_free_info+0x3f/0x60 [ 13.184322] __kasan_slab_free+0x56/0x70 [ 13.184609] kfree+0x222/0x3f0 [ 13.184850] kmalloc_uaf+0x12c/0x380 [ 13.185002] kunit_try_run_case+0x1a5/0x480 [ 13.185313] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.185820] kthread+0x337/0x6f0 [ 13.185996] ret_from_fork+0x116/0x1d0 [ 13.186246] ret_from_fork_asm+0x1a/0x30 [ 13.186535] [ 13.186727] The buggy address belongs to the object at ffff88810256a320 [ 13.186727] which belongs to the cache kmalloc-16 of size 16 [ 13.187236] The buggy address is located 8 bytes inside of [ 13.187236] freed 16-byte region [ffff88810256a320, ffff88810256a330) [ 13.187943] [ 13.188057] The buggy address belongs to the physical page: [ 13.188522] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10256a [ 13.188946] flags: 0x200000000000000(node=0|zone=2) [ 13.189335] page_type: f5(slab) [ 13.189556] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.189940] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.190404] page dumped because: kasan: bad access detected [ 13.190853] [ 13.190934] Memory state around the buggy address: [ 13.191215] ffff88810256a200: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc [ 13.191761] ffff88810256a280: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc [ 13.192228] >ffff88810256a300: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 13.192754] ^ [ 13.192975] ffff88810256a380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.193561] ffff88810256a400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.193969] ==================================================================