Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.003345] ================================================================== [ 19.003949] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 19.004785] Read of size 1 at addr fff00000c5a02e28 by task kunit_try_catch/177 [ 19.005419] [ 19.005760] CPU: 1 UID: 0 PID: 177 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 19.006015] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.006139] Hardware name: linux,dummy-virt (DT) [ 19.006227] Call trace: [ 19.006282] show_stack+0x20/0x38 (C) [ 19.006404] dump_stack_lvl+0x8c/0xd0 [ 19.006462] print_report+0x118/0x608 [ 19.006587] kasan_report+0xdc/0x128 [ 19.006713] __asan_report_load1_noabort+0x20/0x30 [ 19.006822] kmalloc_uaf2+0x3f4/0x468 [ 19.006932] kunit_try_run_case+0x170/0x3f0 [ 19.007028] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.007122] kthread+0x318/0x620 [ 19.007173] ret_from_fork+0x10/0x20 [ 19.007227] [ 19.012229] Allocated by task 177: [ 19.012776] kasan_save_stack+0x3c/0x68 [ 19.013323] kasan_save_track+0x20/0x40 [ 19.013811] kasan_save_alloc_info+0x40/0x58 [ 19.014258] __kasan_kmalloc+0xd4/0xd8 [ 19.015082] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.015534] kmalloc_uaf2+0xc4/0x468 [ 19.016036] kunit_try_run_case+0x170/0x3f0 [ 19.016573] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.016969] kthread+0x318/0x620 [ 19.017411] ret_from_fork+0x10/0x20 [ 19.017860] [ 19.018161] Freed by task 177: [ 19.018581] kasan_save_stack+0x3c/0x68 [ 19.019391] kasan_save_track+0x20/0x40 [ 19.019660] kasan_save_free_info+0x4c/0x78 [ 19.020173] __kasan_slab_free+0x6c/0x98 [ 19.020659] kfree+0x214/0x3c8 [ 19.021098] kmalloc_uaf2+0x134/0x468 [ 19.021518] kunit_try_run_case+0x170/0x3f0 [ 19.022022] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.022482] kthread+0x318/0x620 [ 19.023150] ret_from_fork+0x10/0x20 [ 19.023348] [ 19.023453] The buggy address belongs to the object at fff00000c5a02e00 [ 19.023453] which belongs to the cache kmalloc-64 of size 64 [ 19.023805] The buggy address is located 40 bytes inside of [ 19.023805] freed 64-byte region [fff00000c5a02e00, fff00000c5a02e40) [ 19.024120] [ 19.024219] The buggy address belongs to the physical page: [ 19.024393] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a02 [ 19.024632] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.025180] page_type: f5(slab) [ 19.025620] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.026405] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.027698] page dumped because: kasan: bad access detected [ 19.028312] [ 19.028544] Memory state around the buggy address: [ 19.028951] fff00000c5a02d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.029474] fff00000c5a02d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.030797] >fff00000c5a02e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.031336] ^ [ 19.032039] fff00000c5a02e80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 19.032860] fff00000c5a02f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.033513] ==================================================================
[ 12.749018] ================================================================== [ 12.750240] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4aa/0x520 [ 12.750699] Read of size 1 at addr ffff888101b2b4a8 by task kunit_try_catch/196 [ 12.750938] [ 12.751104] CPU: 1 UID: 0 PID: 196 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 12.751157] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.751169] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.751191] Call Trace: [ 12.751206] <TASK> [ 12.751260] dump_stack_lvl+0x73/0xb0 [ 12.751505] print_report+0xd1/0x650 [ 12.751530] ? __virt_addr_valid+0x1db/0x2d0 [ 12.751652] ? kmalloc_uaf2+0x4aa/0x520 [ 12.751673] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.751698] ? kmalloc_uaf2+0x4aa/0x520 [ 12.751717] kasan_report+0x140/0x180 [ 12.751739] ? kmalloc_uaf2+0x4aa/0x520 [ 12.751762] __asan_report_load1_noabort+0x18/0x20 [ 12.751784] kmalloc_uaf2+0x4aa/0x520 [ 12.751803] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.751821] ? finish_task_switch.isra.0+0x153/0x700 [ 12.751854] ? __switch_to+0x5d9/0xf60 [ 12.751881] ? __schedule+0xce8/0x2840 [ 12.751905] ? __pfx_read_tsc+0x10/0x10 [ 12.751926] ? ktime_get_ts64+0x86/0x230 [ 12.751951] kunit_try_run_case+0x1a6/0x480 [ 12.751974] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.752000] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.752021] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.752044] ? __kthread_parkme+0x82/0x160 [ 12.752066] ? preempt_count_sub+0x50/0x80 [ 12.752089] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.752110] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.752135] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.752160] kthread+0x324/0x6e0 [ 12.752180] ? trace_preempt_on+0x20/0xc0 [ 12.752203] ? __pfx_kthread+0x10/0x10 [ 12.752225] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.752247] ? calculate_sigpending+0x7b/0xa0 [ 12.752268] ? __pfx_kthread+0x10/0x10 [ 12.752289] ret_from_fork+0x41/0x80 [ 12.752308] ? __pfx_kthread+0x10/0x10 [ 12.752329] ret_from_fork_asm+0x1a/0x30 [ 12.752360] </TASK> [ 12.752372] [ 12.767170] Allocated by task 196: [ 12.767407] kasan_save_stack+0x45/0x70 [ 12.767628] kasan_save_track+0x18/0x40 [ 12.767811] kasan_save_alloc_info+0x3b/0x50 [ 12.768139] __kasan_kmalloc+0xb7/0xc0 [ 12.768291] __kmalloc_cache_noprof+0x18a/0x420 [ 12.768537] kmalloc_uaf2+0xc7/0x520 [ 12.768720] kunit_try_run_case+0x1a6/0x480 [ 12.768912] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.769248] kthread+0x324/0x6e0 [ 12.769433] ret_from_fork+0x41/0x80 [ 12.769638] ret_from_fork_asm+0x1a/0x30 [ 12.769860] [ 12.769978] Freed by task 196: [ 12.770288] kasan_save_stack+0x45/0x70 [ 12.770507] kasan_save_track+0x18/0x40 [ 12.770714] kasan_save_free_info+0x3f/0x60 [ 12.770919] __kasan_slab_free+0x56/0x70 [ 12.771166] kfree+0x224/0x3f0 [ 12.771310] kmalloc_uaf2+0x14d/0x520 [ 12.771496] kunit_try_run_case+0x1a6/0x480 [ 12.771725] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.772104] kthread+0x324/0x6e0 [ 12.772286] ret_from_fork+0x41/0x80 [ 12.772421] ret_from_fork_asm+0x1a/0x30 [ 12.772562] [ 12.772638] The buggy address belongs to the object at ffff888101b2b480 [ 12.772638] which belongs to the cache kmalloc-64 of size 64 [ 12.773395] The buggy address is located 40 bytes inside of [ 12.773395] freed 64-byte region [ffff888101b2b480, ffff888101b2b4c0) [ 12.773940] [ 12.774126] The buggy address belongs to the physical page: [ 12.774360] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b2b [ 12.774716] flags: 0x200000000000000(node=0|zone=2) [ 12.774965] page_type: f5(slab) [ 12.775187] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.775508] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.775828] page dumped because: kasan: bad access detected [ 12.776179] [ 12.776281] Memory state around the buggy address: [ 12.776515] ffff888101b2b380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.776820] ffff888101b2b400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.777218] >ffff888101b2b480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.777558] ^ [ 12.777786] ffff888101b2b500: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 12.778219] ffff888101b2b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.778530] ==================================================================