Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.907161] ================================================================== [ 16.907276] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 16.907388] Write of size 33 at addr fff00000c78cbe80 by task kunit_try_catch/186 [ 16.907497] [ 16.907559] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 16.907736] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.907793] Hardware name: linux,dummy-virt (DT) [ 16.907858] Call trace: [ 16.907901] show_stack+0x20/0x38 (C) [ 16.908008] dump_stack_lvl+0x8c/0xd0 [ 16.908276] print_report+0x118/0x608 [ 16.908386] kasan_report+0xdc/0x128 [ 16.908481] kasan_check_range+0x100/0x1a8 [ 16.908585] __asan_memset+0x34/0x78 [ 16.908683] kmalloc_uaf_memset+0x170/0x310 [ 16.908780] kunit_try_run_case+0x170/0x3f0 [ 16.908886] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.909786] kthread+0x328/0x630 [ 16.910143] ret_from_fork+0x10/0x20 [ 16.910555] [ 16.910621] Allocated by task 186: [ 16.910684] kasan_save_stack+0x3c/0x68 [ 16.910757] kasan_save_track+0x20/0x40 [ 16.910828] kasan_save_alloc_info+0x40/0x58 [ 16.910899] __kasan_kmalloc+0xd4/0xd8 [ 16.910969] __kmalloc_cache_noprof+0x15c/0x3c0 [ 16.911991] kmalloc_uaf_memset+0xb8/0x310 [ 16.912582] kunit_try_run_case+0x170/0x3f0 [ 16.912830] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.913074] kthread+0x328/0x630 [ 16.913153] ret_from_fork+0x10/0x20 [ 16.913231] [ 16.913272] Freed by task 186: [ 16.913335] kasan_save_stack+0x3c/0x68 [ 16.913929] kasan_save_track+0x20/0x40 [ 16.914548] kasan_save_free_info+0x4c/0x78 [ 16.914648] __kasan_slab_free+0x6c/0x98 [ 16.915125] kfree+0x214/0x3c8 [ 16.915646] kmalloc_uaf_memset+0x11c/0x310 [ 16.915828] kunit_try_run_case+0x170/0x3f0 [ 16.915908] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.916657] kthread+0x328/0x630 [ 16.916740] ret_from_fork+0x10/0x20 [ 16.916813] [ 16.916854] The buggy address belongs to the object at fff00000c78cbe80 [ 16.916854] which belongs to the cache kmalloc-64 of size 64 [ 16.916983] The buggy address is located 0 bytes inside of [ 16.916983] freed 64-byte region [fff00000c78cbe80, fff00000c78cbec0) [ 16.918751] [ 16.918843] The buggy address belongs to the physical page: [ 16.918926] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078cb [ 16.919179] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.919394] page_type: f5(slab) [ 16.919526] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 16.919708] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.919878] page dumped because: kasan: bad access detected [ 16.919951] [ 16.920062] Memory state around the buggy address: [ 16.920151] fff00000c78cbd80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.920391] fff00000c78cbe00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.920746] >fff00000c78cbe80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.920832] ^ [ 16.920904] fff00000c78cbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.921275] fff00000c78cbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.921404] ==================================================================
[ 16.955767] ================================================================== [ 16.956619] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 16.956982] Write of size 33 at addr ffff888102b4c980 by task kunit_try_catch/203 [ 16.957788] [ 16.958466] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 16.958535] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.958548] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.958572] Call Trace: [ 16.958587] <TASK> [ 16.958609] dump_stack_lvl+0x73/0xb0 [ 16.958646] print_report+0xd1/0x650 [ 16.958693] ? __virt_addr_valid+0x1db/0x2d0 [ 16.958729] ? kmalloc_uaf_memset+0x1a3/0x360 [ 16.958764] ? kasan_complete_mode_report_info+0x64/0x200 [ 16.958804] ? kmalloc_uaf_memset+0x1a3/0x360 [ 16.958843] kasan_report+0x141/0x180 [ 16.958879] ? kmalloc_uaf_memset+0x1a3/0x360 [ 16.958974] kasan_check_range+0x10c/0x1c0 [ 16.959047] __asan_memset+0x27/0x50 [ 16.959092] kmalloc_uaf_memset+0x1a3/0x360 [ 16.959133] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 16.959178] ? __schedule+0x10cc/0x2b60 [ 16.959214] ? __pfx_read_tsc+0x10/0x10 [ 16.959247] ? ktime_get_ts64+0x86/0x230 [ 16.959299] kunit_try_run_case+0x1a5/0x480 [ 16.959328] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.959351] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.959375] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.959397] ? __kthread_parkme+0x82/0x180 [ 16.959419] ? preempt_count_sub+0x50/0x80 [ 16.959443] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.959466] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.959489] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.959512] kthread+0x337/0x6f0 [ 16.959532] ? trace_preempt_on+0x20/0xc0 [ 16.959557] ? __pfx_kthread+0x10/0x10 [ 16.959578] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.959598] ? calculate_sigpending+0x7b/0xa0 [ 16.959623] ? __pfx_kthread+0x10/0x10 [ 16.959644] ret_from_fork+0x116/0x1d0 [ 16.959668] ? __pfx_kthread+0x10/0x10 [ 16.959712] ret_from_fork_asm+0x1a/0x30 [ 16.959745] </TASK> [ 16.959759] [ 16.972087] Allocated by task 203: [ 16.972468] kasan_save_stack+0x45/0x70 [ 16.972901] kasan_save_track+0x18/0x40 [ 16.973472] kasan_save_alloc_info+0x3b/0x50 [ 16.973930] __kasan_kmalloc+0xb7/0xc0 [ 16.974290] __kmalloc_cache_noprof+0x189/0x420 [ 16.974714] kmalloc_uaf_memset+0xa9/0x360 [ 16.975065] kunit_try_run_case+0x1a5/0x480 [ 16.975450] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.976009] kthread+0x337/0x6f0 [ 16.976403] ret_from_fork+0x116/0x1d0 [ 16.976578] ret_from_fork_asm+0x1a/0x30 [ 16.976802] [ 16.976991] Freed by task 203: [ 16.977182] kasan_save_stack+0x45/0x70 [ 16.977486] kasan_save_track+0x18/0x40 [ 16.977855] kasan_save_free_info+0x3f/0x60 [ 16.978113] __kasan_slab_free+0x56/0x70 [ 16.978465] kfree+0x222/0x3f0 [ 16.978743] kmalloc_uaf_memset+0x12b/0x360 [ 16.979130] kunit_try_run_case+0x1a5/0x480 [ 16.979489] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.979871] kthread+0x337/0x6f0 [ 16.980165] ret_from_fork+0x116/0x1d0 [ 16.980507] ret_from_fork_asm+0x1a/0x30 [ 16.980655] [ 16.980738] The buggy address belongs to the object at ffff888102b4c980 [ 16.980738] which belongs to the cache kmalloc-64 of size 64 [ 16.981495] The buggy address is located 0 bytes inside of [ 16.981495] freed 64-byte region [ffff888102b4c980, ffff888102b4c9c0) [ 16.982123] [ 16.982365] The buggy address belongs to the physical page: [ 16.982648] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b4c [ 16.982971] flags: 0x200000000000000(node=0|zone=2) [ 16.983204] page_type: f5(slab) [ 16.983543] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 16.984166] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 16.984998] page dumped because: kasan: bad access detected [ 16.985361] [ 16.985478] Memory state around the buggy address: [ 16.985694] ffff888102b4c880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.985954] ffff888102b4c900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.986697] >ffff888102b4c980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 16.987091] ^ [ 16.987409] ffff888102b4ca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.987803] ffff888102b4ca80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.988266] ==================================================================