Date
May 12, 2025, 6:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.618327] ================================================================== [ 18.619445] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 18.619802] Read of size 16 at addr fff00000c1e7a0c0 by task kunit_try_catch/157 [ 18.620873] [ 18.621149] CPU: 0 UID: 0 PID: 157 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 18.621553] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.621595] Hardware name: linux,dummy-virt (DT) [ 18.621635] Call trace: [ 18.621662] show_stack+0x20/0x38 (C) [ 18.621731] dump_stack_lvl+0x8c/0xd0 [ 18.621813] print_report+0x118/0x608 [ 18.621866] kasan_report+0xdc/0x128 [ 18.621917] __asan_report_load16_noabort+0x20/0x30 [ 18.621969] kmalloc_uaf_16+0x3bc/0x438 [ 18.622018] kunit_try_run_case+0x170/0x3f0 [ 18.622086] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.622146] kthread+0x318/0x620 [ 18.622197] ret_from_fork+0x10/0x20 [ 18.622253] [ 18.627309] Allocated by task 157: [ 18.627765] kasan_save_stack+0x3c/0x68 [ 18.628284] kasan_save_track+0x20/0x40 [ 18.628781] kasan_save_alloc_info+0x40/0x58 [ 18.629251] __kasan_kmalloc+0xd4/0xd8 [ 18.629721] __kmalloc_cache_noprof+0x15c/0x3c0 [ 18.630282] kmalloc_uaf_16+0x140/0x438 [ 18.630850] kunit_try_run_case+0x170/0x3f0 [ 18.631326] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.632008] kthread+0x318/0x620 [ 18.632394] ret_from_fork+0x10/0x20 [ 18.632875] [ 18.633212] Freed by task 157: [ 18.633609] kasan_save_stack+0x3c/0x68 [ 18.634138] kasan_save_track+0x20/0x40 [ 18.634663] kasan_save_free_info+0x4c/0x78 [ 18.635080] __kasan_slab_free+0x6c/0x98 [ 18.635420] kfree+0x214/0x3c8 [ 18.635707] kmalloc_uaf_16+0x190/0x438 [ 18.636247] kunit_try_run_case+0x170/0x3f0 [ 18.636664] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.637173] kthread+0x318/0x620 [ 18.637564] ret_from_fork+0x10/0x20 [ 18.638104] [ 18.638458] The buggy address belongs to the object at fff00000c1e7a0c0 [ 18.638458] which belongs to the cache kmalloc-16 of size 16 [ 18.639175] The buggy address is located 0 bytes inside of [ 18.639175] freed 16-byte region [fff00000c1e7a0c0, fff00000c1e7a0d0) [ 18.640305] [ 18.640597] The buggy address belongs to the physical page: [ 18.641196] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101e7a [ 18.641951] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.642622] page_type: f5(slab) [ 18.642951] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.643752] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.644473] page dumped because: kasan: bad access detected [ 18.644988] [ 18.645257] Memory state around the buggy address: [ 18.645826] fff00000c1e79f80: 00 05 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.646571] fff00000c1e7a000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.646987] >fff00000c1e7a080: 00 04 fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 18.647477] ^ [ 18.648221] fff00000c1e7a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.648815] fff00000c1e7a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.649592] ==================================================================
[ 12.413978] ================================================================== [ 12.414882] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47d/0x4c0 [ 12.415146] Read of size 16 at addr ffff888101b28000 by task kunit_try_catch/176 [ 12.415877] [ 12.416088] CPU: 1 UID: 0 PID: 176 Comm: kunit_try_catch Tainted: G B N 6.14.7-rc1 #1 [ 12.416135] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.416147] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.416169] Call Trace: [ 12.416182] <TASK> [ 12.416202] dump_stack_lvl+0x73/0xb0 [ 12.416232] print_report+0xd1/0x650 [ 12.416255] ? __virt_addr_valid+0x1db/0x2d0 [ 12.416278] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.416297] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.416323] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.416342] kasan_report+0x140/0x180 [ 12.416363] ? kmalloc_uaf_16+0x47d/0x4c0 [ 12.416387] __asan_report_load16_noabort+0x18/0x20 [ 12.416410] kmalloc_uaf_16+0x47d/0x4c0 [ 12.416429] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.416450] ? __schedule+0xce8/0x2840 [ 12.416474] ? __pfx_read_tsc+0x10/0x10 [ 12.416496] ? ktime_get_ts64+0x86/0x230 [ 12.416521] kunit_try_run_case+0x1a6/0x480 [ 12.416544] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.416565] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.416585] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.416609] ? __kthread_parkme+0x82/0x160 [ 12.416631] ? preempt_count_sub+0x50/0x80 [ 12.416656] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.416677] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.416702] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.416727] kthread+0x324/0x6e0 [ 12.416748] ? trace_preempt_on+0x20/0xc0 [ 12.416771] ? __pfx_kthread+0x10/0x10 [ 12.416792] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.416815] ? calculate_sigpending+0x7b/0xa0 [ 12.416847] ? __pfx_kthread+0x10/0x10 [ 12.416869] ret_from_fork+0x41/0x80 [ 12.416887] ? __pfx_kthread+0x10/0x10 [ 12.416909] ret_from_fork_asm+0x1a/0x30 [ 12.416940] </TASK> [ 12.416951] [ 12.428931] Allocated by task 176: [ 12.429258] kasan_save_stack+0x45/0x70 [ 12.429624] kasan_save_track+0x18/0x40 [ 12.429994] kasan_save_alloc_info+0x3b/0x50 [ 12.430533] __kasan_kmalloc+0xb7/0xc0 [ 12.430947] __kmalloc_cache_noprof+0x18a/0x420 [ 12.431413] kmalloc_uaf_16+0x15c/0x4c0 [ 12.431815] kunit_try_run_case+0x1a6/0x480 [ 12.432276] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.432522] kthread+0x324/0x6e0 [ 12.432654] ret_from_fork+0x41/0x80 [ 12.432786] ret_from_fork_asm+0x1a/0x30 [ 12.432940] [ 12.433025] Freed by task 176: [ 12.433365] kasan_save_stack+0x45/0x70 [ 12.433783] kasan_save_track+0x18/0x40 [ 12.434231] kasan_save_free_info+0x3f/0x60 [ 12.434695] __kasan_slab_free+0x56/0x70 [ 12.435114] kfree+0x224/0x3f0 [ 12.435483] kmalloc_uaf_16+0x1d7/0x4c0 [ 12.435865] kunit_try_run_case+0x1a6/0x480 [ 12.436355] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.436863] kthread+0x324/0x6e0 [ 12.437108] ret_from_fork+0x41/0x80 [ 12.437544] ret_from_fork_asm+0x1a/0x30 [ 12.437720] [ 12.437803] The buggy address belongs to the object at ffff888101b28000 [ 12.437803] which belongs to the cache kmalloc-16 of size 16 [ 12.438735] The buggy address is located 0 bytes inside of [ 12.438735] freed 16-byte region [ffff888101b28000, ffff888101b28010) [ 12.439980] [ 12.440269] The buggy address belongs to the physical page: [ 12.440623] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101b28 [ 12.440880] flags: 0x200000000000000(node=0|zone=2) [ 12.441063] page_type: f5(slab) [ 12.441274] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.441580] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.441864] page dumped because: kasan: bad access detected [ 12.442202] [ 12.442301] Memory state around the buggy address: [ 12.442496] ffff888101b27f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.442811] ffff888101b27f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.443037] >ffff888101b28000: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.443519] ^ [ 12.443734] ffff888101b28080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.443987] ffff888101b28100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.444410] ==================================================================