Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.292572] ================================================================== [ 22.292719] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 22.292849] Read of size 1 at addr fff00000c5941f90 by task kunit_try_catch/260 [ 22.292951] [ 22.293033] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 22.293286] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.293357] Hardware name: linux,dummy-virt (DT) [ 22.293480] Call trace: [ 22.293608] show_stack+0x20/0x38 (C) [ 22.293722] dump_stack_lvl+0x8c/0xd0 [ 22.293839] print_report+0x118/0x608 [ 22.293959] kasan_report+0xdc/0x128 [ 22.294070] __asan_report_load1_noabort+0x20/0x30 [ 22.294211] strcmp+0xc0/0xc8 [ 22.294314] kasan_strings+0x340/0xb00 [ 22.294410] kunit_try_run_case+0x170/0x3f0 [ 22.294509] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.294640] kthread+0x328/0x630 [ 22.294778] ret_from_fork+0x10/0x20 [ 22.294950] [ 22.295023] Allocated by task 260: [ 22.295099] kasan_save_stack+0x3c/0x68 [ 22.295243] kasan_save_track+0x20/0x40 [ 22.295366] kasan_save_alloc_info+0x40/0x58 [ 22.295500] __kasan_kmalloc+0xd4/0xd8 [ 22.295611] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.295709] kasan_strings+0xc8/0xb00 [ 22.295788] kunit_try_run_case+0x170/0x3f0 [ 22.295899] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.296011] kthread+0x328/0x630 [ 22.296123] ret_from_fork+0x10/0x20 [ 22.296245] [ 22.296312] Freed by task 260: [ 22.296375] kasan_save_stack+0x3c/0x68 [ 22.296467] kasan_save_track+0x20/0x40 [ 22.296553] kasan_save_free_info+0x4c/0x78 [ 22.296650] __kasan_slab_free+0x6c/0x98 [ 22.296742] kfree+0x214/0x3c8 [ 22.296860] kasan_strings+0x24c/0xb00 [ 22.296989] kunit_try_run_case+0x170/0x3f0 [ 22.297120] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.297264] kthread+0x328/0x630 [ 22.297344] ret_from_fork+0x10/0x20 [ 22.297436] [ 22.297775] The buggy address belongs to the object at fff00000c5941f80 [ 22.297775] which belongs to the cache kmalloc-32 of size 32 [ 22.297953] The buggy address is located 16 bytes inside of [ 22.297953] freed 32-byte region [fff00000c5941f80, fff00000c5941fa0) [ 22.298111] [ 22.298188] The buggy address belongs to the physical page: [ 22.298274] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105941 [ 22.298580] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.298732] page_type: f5(slab) [ 22.298883] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.299003] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 22.299150] page dumped because: kasan: bad access detected [ 22.299363] [ 22.299438] Memory state around the buggy address: [ 22.299574] fff00000c5941e80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.299699] fff00000c5941f00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.299806] >fff00000c5941f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.299911] ^ [ 22.300478] fff00000c5942000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.300649] fff00000c5942080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.300854] ==================================================================
[ 14.547078] ================================================================== [ 14.548158] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.548415] Read of size 1 at addr ffff888103acf910 by task kunit_try_catch/277 [ 14.548832] [ 14.548923] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.548968] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.549004] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.549025] Call Trace: [ 14.549037] <TASK> [ 14.549054] dump_stack_lvl+0x73/0xb0 [ 14.549082] print_report+0xd1/0x650 [ 14.549107] ? __virt_addr_valid+0x1db/0x2d0 [ 14.549132] ? strcmp+0xb0/0xc0 [ 14.549166] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.549191] ? strcmp+0xb0/0xc0 [ 14.549209] kasan_report+0x141/0x180 [ 14.549231] ? strcmp+0xb0/0xc0 [ 14.549252] __asan_report_load1_noabort+0x18/0x20 [ 14.549279] strcmp+0xb0/0xc0 [ 14.549298] kasan_strings+0x431/0xe80 [ 14.549319] ? trace_hardirqs_on+0x37/0xe0 [ 14.549342] ? __pfx_kasan_strings+0x10/0x10 [ 14.549363] ? finish_task_switch.isra.0+0x153/0x700 [ 14.549404] ? __switch_to+0x47/0xf50 [ 14.549444] ? __schedule+0x10cc/0x2b60 [ 14.549467] ? __pfx_read_tsc+0x10/0x10 [ 14.549489] ? ktime_get_ts64+0x86/0x230 [ 14.549513] kunit_try_run_case+0x1a5/0x480 [ 14.549539] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.549562] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.549588] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.549612] ? __kthread_parkme+0x82/0x180 [ 14.549633] ? preempt_count_sub+0x50/0x80 [ 14.549675] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.549700] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.549725] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.549762] kthread+0x337/0x6f0 [ 14.549782] ? trace_preempt_on+0x20/0xc0 [ 14.549804] ? __pfx_kthread+0x10/0x10 [ 14.549824] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.549846] ? calculate_sigpending+0x7b/0xa0 [ 14.549871] ? __pfx_kthread+0x10/0x10 [ 14.549894] ret_from_fork+0x116/0x1d0 [ 14.549913] ? __pfx_kthread+0x10/0x10 [ 14.549934] ret_from_fork_asm+0x1a/0x30 [ 14.549965] </TASK> [ 14.549976] [ 14.558531] Allocated by task 277: [ 14.558665] kasan_save_stack+0x45/0x70 [ 14.559737] kasan_save_track+0x18/0x40 [ 14.559912] kasan_save_alloc_info+0x3b/0x50 [ 14.560061] __kasan_kmalloc+0xb7/0xc0 [ 14.560193] __kmalloc_cache_noprof+0x189/0x420 [ 14.560348] kasan_strings+0xc0/0xe80 [ 14.560509] kunit_try_run_case+0x1a5/0x480 [ 14.560778] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.561035] kthread+0x337/0x6f0 [ 14.561207] ret_from_fork+0x116/0x1d0 [ 14.561407] ret_from_fork_asm+0x1a/0x30 [ 14.561605] [ 14.561882] Freed by task 277: [ 14.562050] kasan_save_stack+0x45/0x70 [ 14.562250] kasan_save_track+0x18/0x40 [ 14.562445] kasan_save_free_info+0x3f/0x60 [ 14.563736] __kasan_slab_free+0x56/0x70 [ 14.564951] kfree+0x222/0x3f0 [ 14.565090] kasan_strings+0x2aa/0xe80 [ 14.565223] kunit_try_run_case+0x1a5/0x480 [ 14.565367] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.565537] kthread+0x337/0x6f0 [ 14.565667] ret_from_fork+0x116/0x1d0 [ 14.566207] ret_from_fork_asm+0x1a/0x30 [ 14.566731] [ 14.567921] The buggy address belongs to the object at ffff888103acf900 [ 14.567921] which belongs to the cache kmalloc-32 of size 32 [ 14.569825] The buggy address is located 16 bytes inside of [ 14.569825] freed 32-byte region [ffff888103acf900, ffff888103acf920) [ 14.571585] [ 14.571980] The buggy address belongs to the physical page: [ 14.572725] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103acf [ 14.573207] flags: 0x200000000000000(node=0|zone=2) [ 14.573385] page_type: f5(slab) [ 14.573509] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.574547] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.575553] page dumped because: kasan: bad access detected [ 14.576340] [ 14.576761] Memory state around the buggy address: [ 14.577328] ffff888103acf800: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.578222] ffff888103acf880: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.578563] >ffff888103acf900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.579532] ^ [ 14.580171] ffff888103acf980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.580502] ffff888103acfa00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.581146] ==================================================================