Date
June 2, 2025, 2:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.087011] ================================================================== [ 19.087784] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 19.088621] Read of size 1 at addr fff00000c65b1fa8 by task kunit_try_catch/178 [ 19.089215] [ 19.089819] CPU: 0 UID: 0 PID: 178 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 19.090008] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.090243] Hardware name: linux,dummy-virt (DT) [ 19.090329] Call trace: [ 19.090376] show_stack+0x20/0x38 (C) [ 19.090499] dump_stack_lvl+0x8c/0xd0 [ 19.090599] print_report+0x118/0x608 [ 19.090709] kasan_report+0xdc/0x128 [ 19.090808] __asan_report_load1_noabort+0x20/0x30 [ 19.090900] kmalloc_uaf2+0x3f4/0x468 [ 19.090950] kunit_try_run_case+0x170/0x3f0 [ 19.091005] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.091063] kthread+0x318/0x620 [ 19.091116] ret_from_fork+0x10/0x20 [ 19.091202] [ 19.095138] Allocated by task 178: [ 19.095569] kasan_save_stack+0x3c/0x68 [ 19.096003] kasan_save_track+0x20/0x40 [ 19.096580] kasan_save_alloc_info+0x40/0x58 [ 19.097046] __kasan_kmalloc+0xd4/0xd8 [ 19.097705] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.098406] kmalloc_uaf2+0xc4/0x468 [ 19.098750] kunit_try_run_case+0x170/0x3f0 [ 19.099068] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.099461] kthread+0x318/0x620 [ 19.099898] ret_from_fork+0x10/0x20 [ 19.101034] [ 19.101342] Freed by task 178: [ 19.101620] kasan_save_stack+0x3c/0x68 [ 19.101965] kasan_save_track+0x20/0x40 [ 19.103491] kasan_save_free_info+0x4c/0x78 [ 19.103909] __kasan_slab_free+0x6c/0x98 [ 19.104266] kfree+0x214/0x3c8 [ 19.104565] kmalloc_uaf2+0x134/0x468 [ 19.104896] kunit_try_run_case+0x170/0x3f0 [ 19.105654] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.105998] kthread+0x318/0x620 [ 19.106855] ret_from_fork+0x10/0x20 [ 19.107218] [ 19.107458] The buggy address belongs to the object at fff00000c65b1f80 [ 19.107458] which belongs to the cache kmalloc-64 of size 64 [ 19.108597] The buggy address is located 40 bytes inside of [ 19.108597] freed 64-byte region [fff00000c65b1f80, fff00000c65b1fc0) [ 19.109320] [ 19.109786] The buggy address belongs to the physical page: [ 19.110138] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065b1 [ 19.111180] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.111598] page_type: f5(slab) [ 19.111869] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.112365] raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000 [ 19.113115] page dumped because: kasan: bad access detected [ 19.113978] [ 19.114329] Memory state around the buggy address: [ 19.114657] fff00000c65b1e80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 19.115602] fff00000c65b1f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.116382] >fff00000c65b1f80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.116894] ^ [ 19.117524] fff00000c65b2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.118263] fff00000c65b2080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.119006] ==================================================================
[ 13.000145] ================================================================== [ 13.001005] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4aa/0x520 [ 13.001393] Read of size 1 at addr ffff888102a295a8 by task kunit_try_catch/196 [ 13.001783] [ 13.001971] CPU: 0 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.14.10-rc1 #1 [ 13.002010] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.002031] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.002051] Call Trace: [ 13.002063] <TASK> [ 13.002080] dump_stack_lvl+0x73/0xb0 [ 13.002108] print_report+0xd1/0x650 [ 13.002132] ? __virt_addr_valid+0x1db/0x2d0 [ 13.002157] ? kmalloc_uaf2+0x4aa/0x520 [ 13.002179] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.002206] ? kmalloc_uaf2+0x4aa/0x520 [ 13.002228] kasan_report+0x140/0x180 [ 13.002252] ? kmalloc_uaf2+0x4aa/0x520 [ 13.002279] __asan_report_load1_noabort+0x18/0x20 [ 13.002305] kmalloc_uaf2+0x4aa/0x520 [ 13.002327] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 13.002348] ? finish_task_switch.isra.0+0x153/0x700 [ 13.002375] ? __switch_to+0x5d9/0xf60 [ 13.002403] ? __schedule+0xce8/0x2840 [ 13.002429] ? __pfx_read_tsc+0x10/0x10 [ 13.002453] ? ktime_get_ts64+0x86/0x230 [ 13.002481] kunit_try_run_case+0x1a6/0x480 [ 13.002506] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.002530] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 13.002576] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.002602] ? __kthread_parkme+0x82/0x160 [ 13.002627] ? preempt_count_sub+0x50/0x80 [ 13.002653] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.002680] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.002708] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.002736] kthread+0x324/0x6e0 [ 13.002759] ? trace_preempt_on+0x20/0xc0 [ 13.002785] ? __pfx_kthread+0x10/0x10 [ 13.002809] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.002834] ? calculate_sigpending+0x7b/0xa0 [ 13.002858] ? __pfx_kthread+0x10/0x10 [ 13.002883] ret_from_fork+0x41/0x80 [ 13.002903] ? __pfx_kthread+0x10/0x10 [ 13.002928] ret_from_fork_asm+0x1a/0x30 [ 13.002961] </TASK> [ 13.002971] [ 13.014174] Allocated by task 196: [ 13.014493] kasan_save_stack+0x45/0x70 [ 13.014889] kasan_save_track+0x18/0x40 [ 13.015251] kasan_save_alloc_info+0x3b/0x50 [ 13.015670] __kasan_kmalloc+0xb7/0xc0 [ 13.016033] __kmalloc_cache_noprof+0x18a/0x420 [ 13.016456] kmalloc_uaf2+0xc7/0x520 [ 13.016811] kunit_try_run_case+0x1a6/0x480 [ 13.017135] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.017392] kthread+0x324/0x6e0 [ 13.017600] ret_from_fork+0x41/0x80 [ 13.017922] ret_from_fork_asm+0x1a/0x30 [ 13.018287] [ 13.018446] Freed by task 196: [ 13.018761] kasan_save_stack+0x45/0x70 [ 13.019142] kasan_save_track+0x18/0x40 [ 13.019492] kasan_save_free_info+0x3f/0x60 [ 13.019893] __kasan_slab_free+0x56/0x70 [ 13.020041] kfree+0x224/0x3f0 [ 13.020158] kmalloc_uaf2+0x14d/0x520 [ 13.020289] kunit_try_run_case+0x1a6/0x480 [ 13.020433] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.020749] kthread+0x324/0x6e0 [ 13.021059] ret_from_fork+0x41/0x80 [ 13.021383] ret_from_fork_asm+0x1a/0x30 [ 13.021759] [ 13.021916] The buggy address belongs to the object at ffff888102a29580 [ 13.021916] which belongs to the cache kmalloc-64 of size 64 [ 13.022986] The buggy address is located 40 bytes inside of [ 13.022986] freed 64-byte region [ffff888102a29580, ffff888102a295c0) [ 13.024008] [ 13.024174] The buggy address belongs to the physical page: [ 13.024664] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a29 [ 13.025311] flags: 0x200000000000000(node=0|zone=2) [ 13.025477] page_type: f5(slab) [ 13.025708] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.026374] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 13.027044] page dumped because: kasan: bad access detected [ 13.027423] [ 13.027492] Memory state around the buggy address: [ 13.027857] ffff888102a29480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.028476] ffff888102a29500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.028915] >ffff888102a29580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.029138] ^ [ 13.029285] ffff888102a29600: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 13.029497] ffff888102a29680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.030083] ==================================================================