Date
July 5, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.176317] ================================================================== [ 19.177032] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 19.177171] Read of size 1 at addr fff00000c78aa8a8 by task kunit_try_catch/189 [ 19.177298] [ 19.177379] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.177561] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.177687] Hardware name: linux,dummy-virt (DT) [ 19.177758] Call trace: [ 19.177801] show_stack+0x20/0x38 (C) [ 19.178305] dump_stack_lvl+0x8c/0xd0 [ 19.178455] print_report+0x118/0x608 [ 19.178552] kasan_report+0xdc/0x128 [ 19.179002] __asan_report_load1_noabort+0x20/0x30 [ 19.179122] kmalloc_uaf2+0x3f4/0x468 [ 19.179172] kunit_try_run_case+0x170/0x3f0 [ 19.179221] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.179276] kthread+0x328/0x630 [ 19.179322] ret_from_fork+0x10/0x20 [ 19.179417] [ 19.179464] Allocated by task 189: [ 19.179526] kasan_save_stack+0x3c/0x68 [ 19.179628] kasan_save_track+0x20/0x40 [ 19.179749] kasan_save_alloc_info+0x40/0x58 [ 19.179872] __kasan_kmalloc+0xd4/0xd8 [ 19.179985] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.180082] kmalloc_uaf2+0xc4/0x468 [ 19.180173] kunit_try_run_case+0x170/0x3f0 [ 19.180251] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.180394] kthread+0x328/0x630 [ 19.180503] ret_from_fork+0x10/0x20 [ 19.180617] [ 19.180680] Freed by task 189: [ 19.180739] kasan_save_stack+0x3c/0x68 [ 19.180826] kasan_save_track+0x20/0x40 [ 19.180933] kasan_save_free_info+0x4c/0x78 [ 19.181062] __kasan_slab_free+0x6c/0x98 [ 19.181179] kfree+0x214/0x3c8 [ 19.181256] kmalloc_uaf2+0x134/0x468 [ 19.181655] kunit_try_run_case+0x170/0x3f0 [ 19.181936] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.182165] kthread+0x328/0x630 [ 19.182347] ret_from_fork+0x10/0x20 [ 19.182487] [ 19.182551] The buggy address belongs to the object at fff00000c78aa880 [ 19.182551] which belongs to the cache kmalloc-64 of size 64 [ 19.182711] The buggy address is located 40 bytes inside of [ 19.182711] freed 64-byte region [fff00000c78aa880, fff00000c78aa8c0) [ 19.182865] [ 19.182917] The buggy address belongs to the physical page: [ 19.182990] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078aa [ 19.183099] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.183199] page_type: f5(slab) [ 19.183265] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.184988] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.185133] page dumped because: kasan: bad access detected [ 19.185217] [ 19.185520] Memory state around the buggy address: [ 19.185768] fff00000c78aa780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.185885] fff00000c78aa800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.185989] >fff00000c78aa880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.186077] ^ [ 19.186176] fff00000c78aa900: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 19.186283] fff00000c78aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.186500] ==================================================================
[ 13.958133] ================================================================== [ 13.958694] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 13.959240] Read of size 1 at addr ffff88810332dd28 by task kunit_try_catch/205 [ 13.959591] [ 13.959751] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.959808] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.959822] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.959849] Call Trace: [ 13.959864] <TASK> [ 13.959885] dump_stack_lvl+0x73/0xb0 [ 13.959922] print_report+0xd1/0x650 [ 13.959948] ? __virt_addr_valid+0x1db/0x2d0 [ 13.959977] ? kmalloc_uaf2+0x4a8/0x520 [ 13.960000] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.960026] ? kmalloc_uaf2+0x4a8/0x520 [ 13.960049] kasan_report+0x141/0x180 [ 13.960142] ? kmalloc_uaf2+0x4a8/0x520 [ 13.960191] __asan_report_load1_noabort+0x18/0x20 [ 13.960219] kmalloc_uaf2+0x4a8/0x520 [ 13.960243] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 13.960265] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.960301] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 13.960329] kunit_try_run_case+0x1a5/0x480 [ 13.960359] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.960383] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.960411] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.960437] ? __kthread_parkme+0x82/0x180 [ 13.960462] ? preempt_count_sub+0x50/0x80 [ 13.960491] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.960519] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.960546] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.960572] kthread+0x337/0x6f0 [ 13.960594] ? trace_preempt_on+0x20/0xc0 [ 13.960621] ? __pfx_kthread+0x10/0x10 [ 13.960645] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.960678] ? calculate_sigpending+0x7b/0xa0 [ 13.960707] ? __pfx_kthread+0x10/0x10 [ 13.960731] ret_from_fork+0x116/0x1d0 [ 13.960754] ? __pfx_kthread+0x10/0x10 [ 13.960825] ret_from_fork_asm+0x1a/0x30 [ 13.960868] </TASK> [ 13.960882] [ 13.970031] Allocated by task 205: [ 13.970321] kasan_save_stack+0x45/0x70 [ 13.970575] kasan_save_track+0x18/0x40 [ 13.970912] kasan_save_alloc_info+0x3b/0x50 [ 13.971318] __kasan_kmalloc+0xb7/0xc0 [ 13.971616] __kmalloc_cache_noprof+0x189/0x420 [ 13.971939] kmalloc_uaf2+0xc6/0x520 [ 13.972318] kunit_try_run_case+0x1a5/0x480 [ 13.972576] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.972951] kthread+0x337/0x6f0 [ 13.973146] ret_from_fork+0x116/0x1d0 [ 13.973306] ret_from_fork_asm+0x1a/0x30 [ 13.973475] [ 13.973562] Freed by task 205: [ 13.973782] kasan_save_stack+0x45/0x70 [ 13.974220] kasan_save_track+0x18/0x40 [ 13.974519] kasan_save_free_info+0x3f/0x60 [ 13.974813] __kasan_slab_free+0x56/0x70 [ 13.974979] kfree+0x222/0x3f0 [ 13.975118] kmalloc_uaf2+0x14c/0x520 [ 13.975434] kunit_try_run_case+0x1a5/0x480 [ 13.975735] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.976064] kthread+0x337/0x6f0 [ 13.976349] ret_from_fork+0x116/0x1d0 [ 13.976515] ret_from_fork_asm+0x1a/0x30 [ 13.976764] [ 13.976909] The buggy address belongs to the object at ffff88810332dd00 [ 13.976909] which belongs to the cache kmalloc-64 of size 64 [ 13.977800] The buggy address is located 40 bytes inside of [ 13.977800] freed 64-byte region [ffff88810332dd00, ffff88810332dd40) [ 13.978835] [ 13.978991] The buggy address belongs to the physical page: [ 13.979882] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10332d [ 13.980527] flags: 0x200000000000000(node=0|zone=2) [ 13.981012] page_type: f5(slab) [ 13.981239] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 13.981614] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 13.982411] page dumped because: kasan: bad access detected [ 13.983468] [ 13.983617] Memory state around the buggy address: [ 13.984291] ffff88810332dc00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.985042] ffff88810332dc80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.985411] >ffff88810332dd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 13.985749] ^ [ 13.986367] ffff88810332dd80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 13.987381] ffff88810332de00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.988183] ==================================================================