Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.887912] ================================================================== [ 16.888035] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 16.888160] Read of size 1 at addr fff00000c10cc848 by task kunit_try_catch/184 [ 16.888266] [ 16.888346] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 16.888528] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.888613] Hardware name: linux,dummy-virt (DT) [ 16.889147] Call trace: [ 16.889214] show_stack+0x20/0x38 (C) [ 16.889375] dump_stack_lvl+0x8c/0xd0 [ 16.889485] print_report+0x118/0x608 [ 16.889579] kasan_report+0xdc/0x128 [ 16.889675] __asan_report_load1_noabort+0x20/0x30 [ 16.889783] kmalloc_uaf+0x300/0x338 [ 16.889877] kunit_try_run_case+0x170/0x3f0 [ 16.890382] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.890505] kthread+0x328/0x630 [ 16.890614] ret_from_fork+0x10/0x20 [ 16.890718] [ 16.890763] Allocated by task 184: [ 16.890823] kasan_save_stack+0x3c/0x68 [ 16.890911] kasan_save_track+0x20/0x40 [ 16.891603] kasan_save_alloc_info+0x40/0x58 [ 16.891956] __kasan_kmalloc+0xd4/0xd8 [ 16.892318] __kmalloc_cache_noprof+0x15c/0x3c0 [ 16.892686] kmalloc_uaf+0xb8/0x338 [ 16.893057] kunit_try_run_case+0x170/0x3f0 [ 16.893145] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.893253] kthread+0x328/0x630 [ 16.893385] ret_from_fork+0x10/0x20 [ 16.893504] [ 16.893552] Freed by task 184: [ 16.893611] kasan_save_stack+0x3c/0x68 [ 16.893690] kasan_save_track+0x20/0x40 [ 16.893759] kasan_save_free_info+0x4c/0x78 [ 16.893840] __kasan_slab_free+0x6c/0x98 [ 16.893946] kfree+0x214/0x3c8 [ 16.894013] kmalloc_uaf+0x11c/0x338 [ 16.894102] kunit_try_run_case+0x170/0x3f0 [ 16.894202] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.894293] kthread+0x328/0x630 [ 16.894723] ret_from_fork+0x10/0x20 [ 16.894961] [ 16.895003] The buggy address belongs to the object at fff00000c10cc840 [ 16.895003] which belongs to the cache kmalloc-16 of size 16 [ 16.895122] The buggy address is located 8 bytes inside of [ 16.895122] freed 16-byte region [fff00000c10cc840, fff00000c10cc850) [ 16.895237] [ 16.895274] The buggy address belongs to the physical page: [ 16.895336] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1010cc [ 16.895441] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.896097] page_type: f5(slab) [ 16.897317] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.897518] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.897777] page dumped because: kasan: bad access detected [ 16.897884] [ 16.897997] Memory state around the buggy address: [ 16.898093] fff00000c10cc700: fa fb fc fc 00 07 fc fc fa fb fc fc fa fb fc fc [ 16.898170] fff00000c10cc780: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.898256] >fff00000c10cc800: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 16.898323] ^ [ 16.898393] fff00000c10cc880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.898478] fff00000c10cc900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.899218] ==================================================================
[ 16.911494] ================================================================== [ 16.912226] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 16.912879] Read of size 1 at addr ffff88810229d6a8 by task kunit_try_catch/201 [ 16.913220] [ 16.913595] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 16.913700] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.913726] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.913771] Call Trace: [ 16.913796] <TASK> [ 16.913828] dump_stack_lvl+0x73/0xb0 [ 16.913889] print_report+0xd1/0x650 [ 16.913930] ? __virt_addr_valid+0x1db/0x2d0 [ 16.913972] ? kmalloc_uaf+0x320/0x380 [ 16.914011] ? kasan_complete_mode_report_info+0x64/0x200 [ 16.914050] ? kmalloc_uaf+0x320/0x380 [ 16.914088] kasan_report+0x141/0x180 [ 16.914132] ? kmalloc_uaf+0x320/0x380 [ 16.914178] __asan_report_load1_noabort+0x18/0x20 [ 16.914215] kmalloc_uaf+0x320/0x380 [ 16.914250] ? __pfx_kmalloc_uaf+0x10/0x10 [ 16.914307] ? __schedule+0x10cc/0x2b60 [ 16.914354] ? __pfx_read_tsc+0x10/0x10 [ 16.914398] ? ktime_get_ts64+0x86/0x230 [ 16.914597] kunit_try_run_case+0x1a5/0x480 [ 16.914653] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.914698] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.914755] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.914779] ? __kthread_parkme+0x82/0x180 [ 16.914801] ? preempt_count_sub+0x50/0x80 [ 16.914826] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.914850] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.914874] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.914898] kthread+0x337/0x6f0 [ 16.914918] ? trace_preempt_on+0x20/0xc0 [ 16.914944] ? __pfx_kthread+0x10/0x10 [ 16.914965] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.914987] ? calculate_sigpending+0x7b/0xa0 [ 16.915025] ? __pfx_kthread+0x10/0x10 [ 16.915065] ret_from_fork+0x116/0x1d0 [ 16.915123] ? __pfx_kthread+0x10/0x10 [ 16.915161] ret_from_fork_asm+0x1a/0x30 [ 16.915211] </TASK> [ 16.915233] [ 16.928991] Allocated by task 201: [ 16.929387] kasan_save_stack+0x45/0x70 [ 16.929943] kasan_save_track+0x18/0x40 [ 16.930297] kasan_save_alloc_info+0x3b/0x50 [ 16.930786] __kasan_kmalloc+0xb7/0xc0 [ 16.931188] __kmalloc_cache_noprof+0x189/0x420 [ 16.931624] kmalloc_uaf+0xaa/0x380 [ 16.932082] kunit_try_run_case+0x1a5/0x480 [ 16.932532] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.933025] kthread+0x337/0x6f0 [ 16.933738] ret_from_fork+0x116/0x1d0 [ 16.934000] ret_from_fork_asm+0x1a/0x30 [ 16.934354] [ 16.934539] Freed by task 201: [ 16.934870] kasan_save_stack+0x45/0x70 [ 16.935106] kasan_save_track+0x18/0x40 [ 16.935697] kasan_save_free_info+0x3f/0x60 [ 16.935975] __kasan_slab_free+0x56/0x70 [ 16.936347] kfree+0x222/0x3f0 [ 16.936508] kmalloc_uaf+0x12c/0x380 [ 16.936685] kunit_try_run_case+0x1a5/0x480 [ 16.937425] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.937953] kthread+0x337/0x6f0 [ 16.938472] ret_from_fork+0x116/0x1d0 [ 16.938870] ret_from_fork_asm+0x1a/0x30 [ 16.939241] [ 16.939464] The buggy address belongs to the object at ffff88810229d6a0 [ 16.939464] which belongs to the cache kmalloc-16 of size 16 [ 16.940394] The buggy address is located 8 bytes inside of [ 16.940394] freed 16-byte region [ffff88810229d6a0, ffff88810229d6b0) [ 16.940807] [ 16.940945] The buggy address belongs to the physical page: [ 16.941779] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10229d [ 16.942426] flags: 0x200000000000000(node=0|zone=2) [ 16.942727] page_type: f5(slab) [ 16.942972] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 16.943691] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.944019] page dumped because: kasan: bad access detected [ 16.944556] [ 16.944745] Memory state around the buggy address: [ 16.945053] ffff88810229d580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.945340] ffff88810229d600: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc [ 16.945811] >ffff88810229d680: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 16.946102] ^ [ 16.946913] ffff88810229d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.947524] ffff88810229d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.948199] ==================================================================