Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.176647] ================================================================== [ 20.177490] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x30c/0x340 [ 20.178249] Read of size 1 at addr fff00000c6451428 by task kunit_try_catch/171 [ 20.178745] [ 20.179074] CPU: 1 UID: 0 PID: 171 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 20.179295] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.179352] Hardware name: linux,dummy-virt (DT) [ 20.179418] Call trace: [ 20.179460] dump_backtrace+0x9c/0x128 [ 20.179570] show_stack+0x20/0x38 [ 20.179659] dump_stack_lvl+0x8c/0xd0 [ 20.179763] print_report+0x118/0x5f0 [ 20.179861] kasan_report+0xdc/0x128 [ 20.179954] __asan_report_load1_noabort+0x20/0x30 [ 20.180062] kmalloc_uaf+0x30c/0x340 [ 20.180182] kunit_try_run_case+0x170/0x3f0 [ 20.180420] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.180480] kthread+0x24c/0x2d0 [ 20.180526] ret_from_fork+0x10/0x20 [ 20.180576] [ 20.185386] Allocated by task 171: [ 20.185874] kasan_save_stack+0x3c/0x68 [ 20.186142] kasan_save_track+0x20/0x40 [ 20.186644] kasan_save_alloc_info+0x40/0x58 [ 20.187506] __kasan_kmalloc+0xd4/0xd8 [ 20.188190] __kmalloc_cache_noprof+0x154/0x320 [ 20.188724] kmalloc_uaf+0xb8/0x340 [ 20.189703] kunit_try_run_case+0x170/0x3f0 [ 20.190144] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.190767] kthread+0x24c/0x2d0 [ 20.191260] ret_from_fork+0x10/0x20 [ 20.191882] [ 20.192059] Freed by task 171: [ 20.192699] kasan_save_stack+0x3c/0x68 [ 20.193226] kasan_save_track+0x20/0x40 [ 20.193681] kasan_save_free_info+0x4c/0x78 [ 20.194201] __kasan_slab_free+0x6c/0x98 [ 20.194563] kfree+0x110/0x3b8 [ 20.194996] kmalloc_uaf+0x120/0x340 [ 20.195702] kunit_try_run_case+0x170/0x3f0 [ 20.196103] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.196727] kthread+0x24c/0x2d0 [ 20.197105] ret_from_fork+0x10/0x20 [ 20.197587] [ 20.197858] The buggy address belongs to the object at fff00000c6451420 [ 20.197858] which belongs to the cache kmalloc-16 of size 16 [ 20.198815] The buggy address is located 8 bytes inside of [ 20.198815] freed 16-byte region [fff00000c6451420, fff00000c6451430) [ 20.200349] [ 20.200874] The buggy address belongs to the physical page: [ 20.201636] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106451 [ 20.202063] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.202781] page_type: f5(slab) [ 20.203100] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 20.204119] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 20.204847] page dumped because: kasan: bad access detected [ 20.205345] [ 20.205507] Memory state around the buggy address: [ 20.205777] fff00000c6451300: 00 02 fc fc 00 02 fc fc 00 06 fc fc 00 06 fc fc [ 20.206538] fff00000c6451380: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 20.207556] >fff00000c6451400: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 20.207907] ^ [ 20.208462] fff00000c6451480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.209183] fff00000c6451500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.209780] ==================================================================
[ 12.325004] ================================================================== [ 12.325598] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x322/0x380 [ 12.326030] Read of size 1 at addr ffff8881024e41a8 by task kunit_try_catch/189 [ 12.326370] [ 12.326804] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.326888] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.326903] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.326932] Call Trace: [ 12.326949] <TASK> [ 12.326967] dump_stack_lvl+0x73/0xb0 [ 12.326999] print_report+0xd1/0x640 [ 12.327029] ? __virt_addr_valid+0x1db/0x2d0 [ 12.327063] ? kmalloc_uaf+0x322/0x380 [ 12.327486] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.327530] ? kmalloc_uaf+0x322/0x380 [ 12.327562] kasan_report+0x140/0x180 [ 12.327588] ? kmalloc_uaf+0x322/0x380 [ 12.327612] __asan_report_load1_noabort+0x18/0x20 [ 12.327632] kmalloc_uaf+0x322/0x380 [ 12.327652] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.327696] ? __schedule+0xc49/0x27a0 [ 12.327718] ? __pfx_read_tsc+0x10/0x10 [ 12.327738] ? ktime_get_ts64+0x84/0x230 [ 12.327763] kunit_try_run_case+0x1a6/0x480 [ 12.327786] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.327804] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.327824] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.327846] ? __kthread_parkme+0x82/0x160 [ 12.327865] ? preempt_count_sub+0x50/0x80 [ 12.327887] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.327906] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.327929] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.327953] kthread+0x257/0x310 [ 12.327970] ? __pfx_kthread+0x10/0x10 [ 12.327987] ret_from_fork+0x41/0x80 [ 12.328006] ? __pfx_kthread+0x10/0x10 [ 12.328023] ret_from_fork_asm+0x1a/0x30 [ 12.328067] </TASK> [ 12.328150] [ 12.336211] Allocated by task 189: [ 12.336473] kasan_save_stack+0x45/0x70 [ 12.336689] kasan_save_track+0x18/0x40 [ 12.336947] kasan_save_alloc_info+0x3b/0x50 [ 12.337335] __kasan_kmalloc+0xb7/0xc0 [ 12.337516] __kmalloc_cache_noprof+0x168/0x350 [ 12.337710] kmalloc_uaf+0xab/0x380 [ 12.337861] kunit_try_run_case+0x1a6/0x480 [ 12.338576] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.338993] kthread+0x257/0x310 [ 12.339253] ret_from_fork+0x41/0x80 [ 12.339649] ret_from_fork_asm+0x1a/0x30 [ 12.339963] [ 12.340092] Freed by task 189: [ 12.340259] kasan_save_stack+0x45/0x70 [ 12.340480] kasan_save_track+0x18/0x40 [ 12.340715] kasan_save_free_info+0x3f/0x60 [ 12.341008] __kasan_slab_free+0x56/0x70 [ 12.341229] kfree+0x123/0x3d0 [ 12.341389] kmalloc_uaf+0x12d/0x380 [ 12.341627] kunit_try_run_case+0x1a6/0x480 [ 12.342022] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.342406] kthread+0x257/0x310 [ 12.342609] ret_from_fork+0x41/0x80 [ 12.342823] ret_from_fork_asm+0x1a/0x30 [ 12.342997] [ 12.343227] The buggy address belongs to the object at ffff8881024e41a0 [ 12.343227] which belongs to the cache kmalloc-16 of size 16 [ 12.343975] The buggy address is located 8 bytes inside of [ 12.343975] freed 16-byte region [ffff8881024e41a0, ffff8881024e41b0) [ 12.345095] [ 12.345267] The buggy address belongs to the physical page: [ 12.345755] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024e4 [ 12.346127] flags: 0x200000000000000(node=0|zone=2) [ 12.346546] page_type: f5(slab) [ 12.346818] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.347098] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 12.347466] page dumped because: kasan: bad access detected [ 12.347828] [ 12.347966] Memory state around the buggy address: [ 12.348420] ffff8881024e4080: fa fb fc fc 00 03 fc fc 00 03 fc fc 00 05 fc fc [ 12.348881] ffff8881024e4100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.349734] >ffff8881024e4180: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.350071] ^ [ 12.350530] ffff8881024e4200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.350817] ffff8881024e4280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.351355] ==================================================================