Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.014843] ================================================================== [ 24.015992] BUG: KASAN: slab-use-after-free in strrchr+0x6c/0x78 [ 24.016683] Read of size 1 at addr fff00000c41f1950 by task kunit_try_catch/247 [ 24.018060] [ 24.018396] CPU: 1 UID: 0 PID: 247 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 24.018599] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.018685] Hardware name: linux,dummy-virt (DT) [ 24.018776] Call trace: [ 24.018847] dump_backtrace+0x9c/0x128 [ 24.018985] show_stack+0x20/0x38 [ 24.019106] dump_stack_lvl+0x8c/0xd0 [ 24.019230] print_report+0x118/0x5f0 [ 24.019350] kasan_report+0xdc/0x128 [ 24.019533] __asan_report_load1_noabort+0x20/0x30 [ 24.019654] strrchr+0x6c/0x78 [ 24.019757] kasan_strings+0x1f0/0x938 [ 24.019841] kunit_try_run_case+0x170/0x3f0 [ 24.019893] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.019951] kthread+0x24c/0x2d0 [ 24.020028] ret_from_fork+0x10/0x20 [ 24.020079] [ 24.028201] Allocated by task 247: [ 24.028666] kasan_save_stack+0x3c/0x68 [ 24.029232] kasan_save_track+0x20/0x40 [ 24.029707] kasan_save_alloc_info+0x40/0x58 [ 24.030268] __kasan_kmalloc+0xd4/0xd8 [ 24.030795] __kmalloc_cache_noprof+0x154/0x320 [ 24.032223] kasan_strings+0xb0/0x938 [ 24.032607] kunit_try_run_case+0x170/0x3f0 [ 24.033154] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.033796] kthread+0x24c/0x2d0 [ 24.034278] ret_from_fork+0x10/0x20 [ 24.034734] [ 24.035089] Freed by task 247: [ 24.035560] kasan_save_stack+0x3c/0x68 [ 24.036117] kasan_save_track+0x20/0x40 [ 24.036605] kasan_save_free_info+0x4c/0x78 [ 24.037566] __kasan_slab_free+0x6c/0x98 [ 24.038142] kfree+0x110/0x3b8 [ 24.038588] kasan_strings+0x128/0x938 [ 24.039078] kunit_try_run_case+0x170/0x3f0 [ 24.040286] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.040908] kthread+0x24c/0x2d0 [ 24.041435] ret_from_fork+0x10/0x20 [ 24.041920] [ 24.042393] The buggy address belongs to the object at fff00000c41f1940 [ 24.042393] which belongs to the cache kmalloc-32 of size 32 [ 24.043850] The buggy address is located 16 bytes inside of [ 24.043850] freed 32-byte region [fff00000c41f1940, fff00000c41f1960) [ 24.044998] [ 24.045326] The buggy address belongs to the physical page: [ 24.045910] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1041f1 [ 24.046764] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.048105] page_type: f5(slab) [ 24.048516] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 24.049306] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 24.050058] page dumped because: kasan: bad access detected [ 24.050650] [ 24.051000] Memory state around the buggy address: [ 24.051600] fff00000c41f1800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.052697] fff00000c41f1880: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.053488] >fff00000c41f1900: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.054233] ^ [ 24.054872] fff00000c41f1980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.055792] fff00000c41f1a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.056539] ==================================================================
[ 20.720713] ================================================================== [ 20.721349] BUG: KASAN: slab-use-after-free in strrchr+0x64/0x70 [ 20.722271] Read of size 1 at addr ffff888102af74d0 by task kunit_try_catch/264 [ 20.723036] [ 20.723290] CPU: 1 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 20.723411] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.723447] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.723506] Call Trace: [ 20.723542] <TASK> [ 20.723588] dump_stack_lvl+0x73/0xb0 [ 20.723773] print_report+0xd1/0x640 [ 20.723854] ? __virt_addr_valid+0x1db/0x2d0 [ 20.723935] ? strrchr+0x64/0x70 [ 20.724005] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.724085] ? strrchr+0x64/0x70 [ 20.724152] kasan_report+0x140/0x180 [ 20.724252] ? strrchr+0x64/0x70 [ 20.724334] __asan_report_load1_noabort+0x18/0x20 [ 20.724409] strrchr+0x64/0x70 [ 20.724478] kasan_strings+0x24c/0xb60 [ 20.724555] ? __pfx_kasan_strings+0x10/0x10 [ 20.724633] ? __schedule+0xc49/0x27a0 [ 20.724704] ? __pfx_read_tsc+0x10/0x10 [ 20.724769] ? ktime_get_ts64+0x84/0x230 [ 20.724850] kunit_try_run_case+0x1a6/0x480 [ 20.724930] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.724996] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 20.725068] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.725171] ? __kthread_parkme+0x82/0x160 [ 20.725202] ? preempt_count_sub+0x50/0x80 [ 20.725260] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.725291] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.725329] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.725365] kthread+0x257/0x310 [ 20.725390] ? __pfx_kthread+0x10/0x10 [ 20.725415] ret_from_fork+0x41/0x80 [ 20.725458] ? __pfx_kthread+0x10/0x10 [ 20.725555] ret_from_fork_asm+0x1a/0x30 [ 20.725652] </TASK> [ 20.725688] [ 20.739888] Allocated by task 264: [ 20.740258] kasan_save_stack+0x45/0x70 [ 20.740720] kasan_save_track+0x18/0x40 [ 20.741251] kasan_save_alloc_info+0x3b/0x50 [ 20.741637] __kasan_kmalloc+0xb7/0xc0 [ 20.742131] __kmalloc_cache_noprof+0x168/0x350 [ 20.742900] kasan_strings+0xb3/0xb60 [ 20.743244] kunit_try_run_case+0x1a6/0x480 [ 20.743584] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.744275] kthread+0x257/0x310 [ 20.744748] ret_from_fork+0x41/0x80 [ 20.745136] ret_from_fork_asm+0x1a/0x30 [ 20.745671] [ 20.745899] Freed by task 264: [ 20.746289] kasan_save_stack+0x45/0x70 [ 20.746614] kasan_save_track+0x18/0x40 [ 20.746932] kasan_save_free_info+0x3f/0x60 [ 20.747292] __kasan_slab_free+0x56/0x70 [ 20.747620] kfree+0x123/0x3d0 [ 20.747996] kasan_strings+0x13a/0xb60 [ 20.749090] kunit_try_run_case+0x1a6/0x480 [ 20.749636] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.750410] kthread+0x257/0x310 [ 20.750776] ret_from_fork+0x41/0x80 [ 20.751196] ret_from_fork_asm+0x1a/0x30 [ 20.751670] [ 20.752057] The buggy address belongs to the object at ffff888102af74c0 [ 20.752057] which belongs to the cache kmalloc-32 of size 32 [ 20.753328] The buggy address is located 16 bytes inside of [ 20.753328] freed 32-byte region [ffff888102af74c0, ffff888102af74e0) [ 20.754583] [ 20.754822] The buggy address belongs to the physical page: [ 20.755326] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 20.755826] flags: 0x200000000000000(node=0|zone=2) [ 20.756180] page_type: f5(slab) [ 20.756804] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.757715] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 20.759712] page dumped because: kasan: bad access detected [ 20.760151] [ 20.760351] Memory state around the buggy address: [ 20.761856] ffff888102af7380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.762651] ffff888102af7400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.763252] >ffff888102af7480: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.764101] ^ [ 20.765335] ffff888102af7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.766061] ffff888102af7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.766753] ==================================================================