Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.016560] ================================================================== [ 19.016614] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 19.016671] Read of size 1 at addr fff00000c78896d0 by task kunit_try_catch/259 [ 19.017618] [ 19.017688] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 19.017793] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.017825] Hardware name: linux,dummy-virt (DT) [ 19.017858] Call trace: [ 19.017894] show_stack+0x20/0x38 (C) [ 19.017954] dump_stack_lvl+0x8c/0xd0 [ 19.018005] print_report+0x118/0x608 [ 19.018062] kasan_report+0xdc/0x128 [ 19.018111] __asan_report_load1_noabort+0x20/0x30 [ 19.018162] strcmp+0xc0/0xc8 [ 19.019485] kasan_strings+0x340/0xb00 [ 19.019917] kunit_try_run_case+0x170/0x3f0 [ 19.020263] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.020793] kthread+0x328/0x630 [ 19.021003] ret_from_fork+0x10/0x20 [ 19.021068] [ 19.021093] Allocated by task 259: [ 19.021917] kasan_save_stack+0x3c/0x68 [ 19.022118] kasan_save_track+0x20/0x40 [ 19.022354] kasan_save_alloc_info+0x40/0x58 [ 19.022401] __kasan_kmalloc+0xd4/0xd8 [ 19.023321] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.023375] kasan_strings+0xc8/0xb00 [ 19.023482] kunit_try_run_case+0x170/0x3f0 [ 19.023616] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.023678] kthread+0x328/0x630 [ 19.023717] ret_from_fork+0x10/0x20 [ 19.023923] [ 19.023990] Freed by task 259: [ 19.024139] kasan_save_stack+0x3c/0x68 [ 19.024429] kasan_save_track+0x20/0x40 [ 19.024486] kasan_save_free_info+0x4c/0x78 [ 19.024529] __kasan_slab_free+0x6c/0x98 [ 19.024577] kfree+0x214/0x3c8 [ 19.024615] kasan_strings+0x24c/0xb00 [ 19.024652] kunit_try_run_case+0x170/0x3f0 [ 19.024691] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.024735] kthread+0x328/0x630 [ 19.025322] ret_from_fork+0x10/0x20 [ 19.025389] [ 19.025432] The buggy address belongs to the object at fff00000c78896c0 [ 19.025432] which belongs to the cache kmalloc-32 of size 32 [ 19.025576] The buggy address is located 16 bytes inside of [ 19.025576] freed 32-byte region [fff00000c78896c0, fff00000c78896e0) [ 19.025647] [ 19.025671] The buggy address belongs to the physical page: [ 19.025704] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107889 [ 19.025854] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.025987] page_type: f5(slab) [ 19.026074] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.026198] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.026243] page dumped because: kasan: bad access detected [ 19.026322] [ 19.026348] Memory state around the buggy address: [ 19.026384] fff00000c7889580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.026429] fff00000c7889600: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.026472] >fff00000c7889680: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.027036] ^ [ 19.027272] fff00000c7889700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.027322] fff00000c7889780: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.027373] ==================================================================
[ 18.938032] ================================================================== [ 18.939466] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 18.939862] Read of size 1 at addr ffff888102327750 by task kunit_try_catch/276 [ 18.940205] [ 18.940738] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 18.940865] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.940894] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 18.940945] Call Trace: [ 18.940977] <TASK> [ 18.941020] dump_stack_lvl+0x73/0xb0 [ 18.941672] print_report+0xd1/0x650 [ 18.941732] ? __virt_addr_valid+0x1db/0x2d0 [ 18.941762] ? strcmp+0xb0/0xc0 [ 18.941785] ? kasan_complete_mode_report_info+0x64/0x200 [ 18.941810] ? strcmp+0xb0/0xc0 [ 18.941833] kasan_report+0x141/0x180 [ 18.941856] ? strcmp+0xb0/0xc0 [ 18.941883] __asan_report_load1_noabort+0x18/0x20 [ 18.941905] strcmp+0xb0/0xc0 [ 18.941929] kasan_strings+0x431/0xe80 [ 18.941951] ? trace_hardirqs_on+0x37/0xe0 [ 18.941979] ? __pfx_kasan_strings+0x10/0x10 [ 18.942002] ? finish_task_switch.isra.0+0x153/0x700 [ 18.942029] ? __switch_to+0x47/0xf50 [ 18.942102] ? __schedule+0x10cc/0x2b60 [ 18.942147] ? __pfx_read_tsc+0x10/0x10 [ 18.942184] ? ktime_get_ts64+0x86/0x230 [ 18.942227] kunit_try_run_case+0x1a5/0x480 [ 18.942281] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.942311] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 18.942338] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 18.942363] ? __kthread_parkme+0x82/0x180 [ 18.942387] ? preempt_count_sub+0x50/0x80 [ 18.942412] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.942438] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.942464] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 18.942489] kthread+0x337/0x6f0 [ 18.942511] ? trace_preempt_on+0x20/0xc0 [ 18.942535] ? __pfx_kthread+0x10/0x10 [ 18.942558] ? _raw_spin_unlock_irq+0x47/0x80 [ 18.942580] ? calculate_sigpending+0x7b/0xa0 [ 18.942607] ? __pfx_kthread+0x10/0x10 [ 18.942630] ret_from_fork+0x116/0x1d0 [ 18.942650] ? __pfx_kthread+0x10/0x10 [ 18.942713] ret_from_fork_asm+0x1a/0x30 [ 18.942748] </TASK> [ 18.942764] [ 18.958927] Allocated by task 276: [ 18.959722] kasan_save_stack+0x45/0x70 [ 18.960252] kasan_save_track+0x18/0x40 [ 18.960391] kasan_save_alloc_info+0x3b/0x50 [ 18.960493] __kasan_kmalloc+0xb7/0xc0 [ 18.960585] __kmalloc_cache_noprof+0x189/0x420 [ 18.960732] kasan_strings+0xc0/0xe80 [ 18.960901] kunit_try_run_case+0x1a5/0x480 [ 18.961369] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.962149] kthread+0x337/0x6f0 [ 18.962510] ret_from_fork+0x116/0x1d0 [ 18.962985] ret_from_fork_asm+0x1a/0x30 [ 18.963714] [ 18.963970] Freed by task 276: [ 18.964206] kasan_save_stack+0x45/0x70 [ 18.964408] kasan_save_track+0x18/0x40 [ 18.964901] kasan_save_free_info+0x3f/0x60 [ 18.965386] __kasan_slab_free+0x56/0x70 [ 18.966125] kfree+0x222/0x3f0 [ 18.966450] kasan_strings+0x2aa/0xe80 [ 18.967011] kunit_try_run_case+0x1a5/0x480 [ 18.967634] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.968192] kthread+0x337/0x6f0 [ 18.968825] ret_from_fork+0x116/0x1d0 [ 18.969275] ret_from_fork_asm+0x1a/0x30 [ 18.969723] [ 18.969837] The buggy address belongs to the object at ffff888102327740 [ 18.969837] which belongs to the cache kmalloc-32 of size 32 [ 18.971166] The buggy address is located 16 bytes inside of [ 18.971166] freed 32-byte region [ffff888102327740, ffff888102327760) [ 18.972345] [ 18.972430] The buggy address belongs to the physical page: [ 18.972555] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102327 [ 18.972799] flags: 0x200000000000000(node=0|zone=2) [ 18.973274] page_type: f5(slab) [ 18.973594] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 18.974088] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.974383] page dumped because: kasan: bad access detected [ 18.975171] [ 18.975644] Memory state around the buggy address: [ 18.975861] ffff888102327600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.976540] ffff888102327680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.977176] >ffff888102327700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.978101] ^ [ 18.978534] ffff888102327780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.979181] ffff888102327800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.979444] ==================================================================