Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.453194] ================================================================== [ 19.453286] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 19.453374] Write of size 33 at addr fff00000c7785f00 by task kunit_try_catch/186 [ 19.453433] [ 19.453482] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 19.453580] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.454100] Hardware name: linux,dummy-virt (DT) [ 19.454617] Call trace: [ 19.454677] show_stack+0x20/0x38 (C) [ 19.454922] dump_stack_lvl+0x8c/0xd0 [ 19.455172] print_report+0x118/0x608 [ 19.455226] kasan_report+0xdc/0x128 [ 19.455276] kasan_check_range+0x100/0x1a8 [ 19.455593] __asan_memset+0x34/0x78 [ 19.455674] kmalloc_uaf_memset+0x170/0x310 [ 19.455831] kunit_try_run_case+0x170/0x3f0 [ 19.455891] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.456201] kthread+0x328/0x630 [ 19.456453] ret_from_fork+0x10/0x20 [ 19.456529] [ 19.456553] Allocated by task 186: [ 19.456649] kasan_save_stack+0x3c/0x68 [ 19.456700] kasan_save_track+0x20/0x40 [ 19.456808] kasan_save_alloc_info+0x40/0x58 [ 19.457082] __kasan_kmalloc+0xd4/0xd8 [ 19.457216] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.457267] kmalloc_uaf_memset+0xb8/0x310 [ 19.457394] kunit_try_run_case+0x170/0x3f0 [ 19.457456] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.457745] kthread+0x328/0x630 [ 19.457823] ret_from_fork+0x10/0x20 [ 19.457994] [ 19.458065] Freed by task 186: [ 19.458206] kasan_save_stack+0x3c/0x68 [ 19.458313] kasan_save_track+0x20/0x40 [ 19.458360] kasan_save_free_info+0x4c/0x78 [ 19.458404] __kasan_slab_free+0x6c/0x98 [ 19.458709] kfree+0x214/0x3c8 [ 19.458869] kmalloc_uaf_memset+0x11c/0x310 [ 19.458942] kunit_try_run_case+0x170/0x3f0 [ 19.459025] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.459223] kthread+0x328/0x630 [ 19.459274] ret_from_fork+0x10/0x20 [ 19.459379] [ 19.459410] The buggy address belongs to the object at fff00000c7785f00 [ 19.459410] which belongs to the cache kmalloc-64 of size 64 [ 19.459510] The buggy address is located 0 bytes inside of [ 19.459510] freed 64-byte region [fff00000c7785f00, fff00000c7785f40) [ 19.459805] [ 19.459855] The buggy address belongs to the physical page: [ 19.459905] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107785 [ 19.459981] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.460045] page_type: f5(slab) [ 19.460099] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.460433] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.460694] page dumped because: kasan: bad access detected [ 19.460752] [ 19.460775] Memory state around the buggy address: [ 19.460826] fff00000c7785e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.461100] fff00000c7785e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.461156] >fff00000c7785f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.461204] ^ [ 19.461424] fff00000c7785f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.461476] fff00000c7786000: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.461520] ==================================================================
[ 11.387846] ================================================================== [ 11.389336] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 11.389730] Write of size 33 at addr ffff8881026b6780 by task kunit_try_catch/203 [ 11.389965] [ 11.390057] CPU: 1 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 11.390105] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.390116] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.390138] Call Trace: [ 11.390150] <TASK> [ 11.390166] dump_stack_lvl+0x73/0xb0 [ 11.390414] print_report+0xd1/0x650 [ 11.390437] ? __virt_addr_valid+0x1db/0x2d0 [ 11.390461] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.390493] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.390515] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.390730] kasan_report+0x141/0x180 [ 11.390757] ? kmalloc_uaf_memset+0x1a3/0x360 [ 11.390785] kasan_check_range+0x10c/0x1c0 [ 11.390809] __asan_memset+0x27/0x50 [ 11.390829] kmalloc_uaf_memset+0x1a3/0x360 [ 11.390850] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 11.390872] ? __schedule+0x10cc/0x2b60 [ 11.390896] ? __pfx_read_tsc+0x10/0x10 [ 11.390916] ? ktime_get_ts64+0x86/0x230 [ 11.390940] kunit_try_run_case+0x1a5/0x480 [ 11.390964] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.390985] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.391008] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.391030] ? __kthread_parkme+0x82/0x180 [ 11.391050] ? preempt_count_sub+0x50/0x80 [ 11.391074] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.391097] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.391119] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.391142] kthread+0x337/0x6f0 [ 11.391163] ? trace_preempt_on+0x20/0xc0 [ 11.391195] ? __pfx_kthread+0x10/0x10 [ 11.391216] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.391236] ? calculate_sigpending+0x7b/0xa0 [ 11.391259] ? __pfx_kthread+0x10/0x10 [ 11.391280] ret_from_fork+0x116/0x1d0 [ 11.391298] ? __pfx_kthread+0x10/0x10 [ 11.391318] ret_from_fork_asm+0x1a/0x30 [ 11.391349] </TASK> [ 11.391359] [ 11.408298] Allocated by task 203: [ 11.408692] kasan_save_stack+0x45/0x70 [ 11.409032] kasan_save_track+0x18/0x40 [ 11.409171] kasan_save_alloc_info+0x3b/0x50 [ 11.409874] __kasan_kmalloc+0xb7/0xc0 [ 11.410479] __kmalloc_cache_noprof+0x189/0x420 [ 11.410981] kmalloc_uaf_memset+0xa9/0x360 [ 11.411328] kunit_try_run_case+0x1a5/0x480 [ 11.411484] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.411688] kthread+0x337/0x6f0 [ 11.412027] ret_from_fork+0x116/0x1d0 [ 11.412375] ret_from_fork_asm+0x1a/0x30 [ 11.412750] [ 11.412961] Freed by task 203: [ 11.413310] kasan_save_stack+0x45/0x70 [ 11.413699] kasan_save_track+0x18/0x40 [ 11.414137] kasan_save_free_info+0x3f/0x60 [ 11.414630] __kasan_slab_free+0x56/0x70 [ 11.414855] kfree+0x222/0x3f0 [ 11.414968] kmalloc_uaf_memset+0x12b/0x360 [ 11.415111] kunit_try_run_case+0x1a5/0x480 [ 11.415417] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.415963] kthread+0x337/0x6f0 [ 11.416324] ret_from_fork+0x116/0x1d0 [ 11.416750] ret_from_fork_asm+0x1a/0x30 [ 11.417162] [ 11.417336] The buggy address belongs to the object at ffff8881026b6780 [ 11.417336] which belongs to the cache kmalloc-64 of size 64 [ 11.418528] The buggy address is located 0 bytes inside of [ 11.418528] freed 64-byte region [ffff8881026b6780, ffff8881026b67c0) [ 11.419044] [ 11.419128] The buggy address belongs to the physical page: [ 11.419364] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026b6 [ 11.419751] flags: 0x200000000000000(node=0|zone=2) [ 11.419917] page_type: f5(slab) [ 11.420039] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 11.420282] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 11.420697] page dumped because: kasan: bad access detected [ 11.421254] [ 11.421380] Memory state around the buggy address: [ 11.421842] ffff8881026b6680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.422138] ffff8881026b6700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.422884] >ffff8881026b6780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 11.423396] ^ [ 11.423692] ffff8881026b6800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.423988] ffff8881026b6880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.424368] ==================================================================