Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.123367] ================================================================== [ 34.123581] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 34.123737] Read of size 16 at addr fff00000c5d8b020 by task kunit_try_catch/170 [ 34.123892] [ 34.124044] CPU: 1 UID: 0 PID: 170 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.124419] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.124556] Hardware name: linux,dummy-virt (DT) [ 34.124671] Call trace: [ 34.124778] show_stack+0x20/0x38 (C) [ 34.124979] dump_stack_lvl+0x8c/0xd0 [ 34.125193] print_report+0x118/0x5f0 [ 34.125375] kasan_report+0xc8/0x118 [ 34.125558] __asan_report_load16_noabort+0x20/0x30 [ 34.125719] kmalloc_uaf_16+0x3bc/0x438 [ 34.125859] kunit_try_run_case+0x14c/0x3d0 [ 34.126006] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.126204] kthread+0x318/0x618 [ 34.126365] ret_from_fork+0x10/0x20 [ 34.126509] [ 34.126642] Allocated by task 170: [ 34.126763] kasan_save_stack+0x3c/0x68 [ 34.126899] kasan_save_track+0x20/0x40 [ 34.127173] kasan_save_alloc_info+0x40/0x58 [ 34.127312] __kasan_kmalloc+0xd4/0xd8 [ 34.127439] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.127631] kmalloc_uaf_16+0x140/0x438 [ 34.127750] kunit_try_run_case+0x14c/0x3d0 [ 34.127890] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.128026] kthread+0x318/0x618 [ 34.128205] ret_from_fork+0x10/0x20 [ 34.128383] [ 34.128444] Freed by task 170: [ 34.128519] kasan_save_stack+0x3c/0x68 [ 34.128708] kasan_save_track+0x20/0x40 [ 34.128860] kasan_save_free_info+0x4c/0x78 [ 34.129040] __kasan_slab_free+0x6c/0x98 [ 34.129179] kfree+0x214/0x3c8 [ 34.129287] kmalloc_uaf_16+0x190/0x438 [ 34.129402] kunit_try_run_case+0x14c/0x3d0 [ 34.129619] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.129771] kthread+0x318/0x618 [ 34.129884] ret_from_fork+0x10/0x20 [ 34.130161] [ 34.130278] The buggy address belongs to the object at fff00000c5d8b020 [ 34.130278] which belongs to the cache kmalloc-16 of size 16 [ 34.131010] The buggy address is located 0 bytes inside of [ 34.131010] freed 16-byte region [fff00000c5d8b020, fff00000c5d8b030) [ 34.131721] [ 34.131973] The buggy address belongs to the physical page: [ 34.132320] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d8b [ 34.133298] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.133576] page_type: f5(slab) [ 34.133777] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 34.133944] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 34.134091] page dumped because: kasan: bad access detected [ 34.134195] [ 34.134816] Memory state around the buggy address: [ 34.135295] fff00000c5d8af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.136168] fff00000c5d8af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.136483] >fff00000c5d8b000: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 34.136981] ^ [ 34.137507] fff00000c5d8b080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.137667] fff00000c5d8b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.138103] ==================================================================
[ 21.740090] ================================================================== [ 21.740870] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 21.742030] Read of size 16 at addr ffff888102551980 by task kunit_try_catch/189 [ 21.742597] [ 21.742820] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 21.742940] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.742973] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 21.743024] Call Trace: [ 21.743056] <TASK> [ 21.743085] dump_stack_lvl+0x73/0xb0 [ 21.743160] print_report+0xd1/0x660 [ 21.743195] ? __virt_addr_valid+0x1db/0x2d0 [ 21.743286] ? kasan_complete_mode_report_info+0x64/0x200 [ 21.743354] kasan_report+0x104/0x140 [ 21.743406] ? kmalloc_uaf_16+0x47b/0x4c0 [ 21.743467] ? kmalloc_uaf_16+0x47b/0x4c0 [ 21.743539] __asan_report_load16_noabort+0x18/0x20 [ 21.743625] kmalloc_uaf_16+0x47b/0x4c0 [ 21.743687] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 21.744197] ? __schedule+0xd46/0x29c0 [ 21.744259] ? __pfx_read_tsc+0x10/0x10 [ 21.744293] ? ktime_get_ts64+0x86/0x240 [ 21.744331] kunit_try_run_case+0x1b2/0x490 [ 21.744368] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.744400] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 21.744430] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 21.744462] ? __kthread_parkme+0x82/0x160 [ 21.744493] ? preempt_count_sub+0x50/0x80 [ 21.744529] ? __pfx_kunit_try_run_case+0x10/0x10 [ 21.744562] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.744595] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 21.744627] kthread+0x323/0x710 [ 21.744656] ? trace_preempt_on+0x20/0xc0 [ 21.744689] ? __pfx_kthread+0x10/0x10 [ 21.744772] ? _raw_spin_unlock_irq+0x47/0x80 [ 21.744803] ? calculate_sigpending+0x7b/0xa0 [ 21.744834] ? __pfx_kthread+0x10/0x10 [ 21.744866] ret_from_fork+0x41/0x80 [ 21.744898] ? __pfx_kthread+0x10/0x10 [ 21.744930] ret_from_fork_asm+0x1a/0x30 [ 21.744976] </TASK> [ 21.744991] [ 21.758764] Allocated by task 189: [ 21.759209] kasan_save_stack+0x3d/0x60 [ 21.759756] kasan_save_track+0x18/0x40 [ 21.760270] kasan_save_alloc_info+0x3b/0x50 [ 21.760897] __kasan_kmalloc+0xb7/0xc0 [ 21.761365] __kmalloc_cache_noprof+0x183/0x410 [ 21.761662] kmalloc_uaf_16+0x15b/0x4c0 [ 21.762204] kunit_try_run_case+0x1b2/0x490 [ 21.762773] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.763473] kthread+0x323/0x710 [ 21.764065] ret_from_fork+0x41/0x80 [ 21.764634] ret_from_fork_asm+0x1a/0x30 [ 21.765276] [ 21.765559] Freed by task 189: [ 21.765995] kasan_save_stack+0x3d/0x60 [ 21.766462] kasan_save_track+0x18/0x40 [ 21.766994] kasan_save_free_info+0x3f/0x60 [ 21.767435] __kasan_slab_free+0x56/0x70 [ 21.767995] kfree+0x222/0x3f0 [ 21.768448] kmalloc_uaf_16+0x1d6/0x4c0 [ 21.769026] kunit_try_run_case+0x1b2/0x490 [ 21.769652] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 21.770474] kthread+0x323/0x710 [ 21.770935] ret_from_fork+0x41/0x80 [ 21.771238] ret_from_fork_asm+0x1a/0x30 [ 21.771510] [ 21.771691] The buggy address belongs to the object at ffff888102551980 [ 21.771691] which belongs to the cache kmalloc-16 of size 16 [ 21.772624] The buggy address is located 0 bytes inside of [ 21.772624] freed 16-byte region [ffff888102551980, ffff888102551990) [ 21.773947] [ 21.774223] The buggy address belongs to the physical page: [ 21.774926] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102551 [ 21.775850] flags: 0x200000000000000(node=0|zone=2) [ 21.776460] page_type: f5(slab) [ 21.776942] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 21.777779] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.778194] page dumped because: kasan: bad access detected [ 21.778560] [ 21.778799] Memory state around the buggy address: [ 21.779105] ffff888102551880: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.781166] ffff888102551900: 00 05 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc [ 21.782615] >ffff888102551980: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.784589] ^ [ 21.785995] ffff888102551a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.788046] ffff888102551a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.789324] ==================================================================