Date
July 18, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.505217] ================================================================== [ 15.505299] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 15.505438] Read of size 1 at addr fff00000c3ef7de8 by task kunit_try_catch/184 [ 15.505493] [ 15.505829] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.505957] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.506215] Hardware name: linux,dummy-virt (DT) [ 15.506436] Call trace: [ 15.506537] show_stack+0x20/0x38 (C) [ 15.506638] dump_stack_lvl+0x8c/0xd0 [ 15.506752] print_report+0x118/0x5d0 [ 15.506845] kasan_report+0xdc/0x128 [ 15.506970] __asan_report_load1_noabort+0x20/0x30 [ 15.507070] kmalloc_uaf+0x300/0x338 [ 15.507150] kunit_try_run_case+0x170/0x3f0 [ 15.507252] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.507628] kthread+0x328/0x630 [ 15.508012] ret_from_fork+0x10/0x20 [ 15.508202] [ 15.508344] Allocated by task 184: [ 15.508418] kasan_save_stack+0x3c/0x68 [ 15.508734] kasan_save_track+0x20/0x40 [ 15.508984] kasan_save_alloc_info+0x40/0x58 [ 15.509143] __kasan_kmalloc+0xd4/0xd8 [ 15.509261] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.509478] kmalloc_uaf+0xb8/0x338 [ 15.509660] kunit_try_run_case+0x170/0x3f0 [ 15.509736] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.509882] kthread+0x328/0x630 [ 15.509942] ret_from_fork+0x10/0x20 [ 15.510005] [ 15.510025] Freed by task 184: [ 15.510177] kasan_save_stack+0x3c/0x68 [ 15.510422] kasan_save_track+0x20/0x40 [ 15.510631] kasan_save_free_info+0x4c/0x78 [ 15.510838] __kasan_slab_free+0x6c/0x98 [ 15.510945] kfree+0x214/0x3c8 [ 15.511023] kmalloc_uaf+0x11c/0x338 [ 15.511065] kunit_try_run_case+0x170/0x3f0 [ 15.511246] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.511454] kthread+0x328/0x630 [ 15.511604] ret_from_fork+0x10/0x20 [ 15.511679] [ 15.511699] The buggy address belongs to the object at fff00000c3ef7de0 [ 15.511699] which belongs to the cache kmalloc-16 of size 16 [ 15.512143] The buggy address is located 8 bytes inside of [ 15.512143] freed 16-byte region [fff00000c3ef7de0, fff00000c3ef7df0) [ 15.512299] [ 15.512591] The buggy address belongs to the physical page: [ 15.512650] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103ef7 [ 15.512777] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.512857] page_type: f5(slab) [ 15.513198] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.513391] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.513481] page dumped because: kasan: bad access detected [ 15.513514] [ 15.513532] Memory state around the buggy address: [ 15.513566] fff00000c3ef7c80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.513925] fff00000c3ef7d00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.514065] >fff00000c3ef7d80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.514173] ^ [ 15.514294] fff00000c3ef7e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.514572] fff00000c3ef7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.514741] ==================================================================
[ 12.427766] ================================================================== [ 12.428821] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.429311] Read of size 1 at addr ffff88810216cb48 by task kunit_try_catch/203 [ 12.429979] [ 12.430301] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.430354] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.430366] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.430387] Call Trace: [ 12.430400] <TASK> [ 12.430417] dump_stack_lvl+0x73/0xb0 [ 12.430449] print_report+0xd1/0x610 [ 12.430472] ? __virt_addr_valid+0x1db/0x2d0 [ 12.430495] ? kmalloc_uaf+0x320/0x380 [ 12.430514] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.430536] ? kmalloc_uaf+0x320/0x380 [ 12.430555] kasan_report+0x141/0x180 [ 12.430578] ? kmalloc_uaf+0x320/0x380 [ 12.430602] __asan_report_load1_noabort+0x18/0x20 [ 12.430625] kmalloc_uaf+0x320/0x380 [ 12.430644] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.430665] ? __schedule+0x10cc/0x2b60 [ 12.430688] ? __pfx_read_tsc+0x10/0x10 [ 12.430708] ? ktime_get_ts64+0x86/0x230 [ 12.430733] kunit_try_run_case+0x1a5/0x480 [ 12.430757] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.430779] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.430802] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.430825] ? __kthread_parkme+0x82/0x180 [ 12.430847] ? preempt_count_sub+0x50/0x80 [ 12.430872] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.430897] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.430921] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.430944] kthread+0x337/0x6f0 [ 12.430962] ? trace_preempt_on+0x20/0xc0 [ 12.430986] ? __pfx_kthread+0x10/0x10 [ 12.431006] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.431026] ? calculate_sigpending+0x7b/0xa0 [ 12.431050] ? __pfx_kthread+0x10/0x10 [ 12.431070] ret_from_fork+0x116/0x1d0 [ 12.431089] ? __pfx_kthread+0x10/0x10 [ 12.431110] ret_from_fork_asm+0x1a/0x30 [ 12.431140] </TASK> [ 12.431150] [ 12.444105] Allocated by task 203: [ 12.444477] kasan_save_stack+0x45/0x70 [ 12.444848] kasan_save_track+0x18/0x40 [ 12.445216] kasan_save_alloc_info+0x3b/0x50 [ 12.445573] __kasan_kmalloc+0xb7/0xc0 [ 12.445845] __kmalloc_cache_noprof+0x189/0x420 [ 12.446006] kmalloc_uaf+0xaa/0x380 [ 12.446132] kunit_try_run_case+0x1a5/0x480 [ 12.446286] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.446521] kthread+0x337/0x6f0 [ 12.446663] ret_from_fork+0x116/0x1d0 [ 12.446795] ret_from_fork_asm+0x1a/0x30 [ 12.446988] [ 12.447092] Freed by task 203: [ 12.447223] kasan_save_stack+0x45/0x70 [ 12.447412] kasan_save_track+0x18/0x40 [ 12.447658] kasan_save_free_info+0x3f/0x60 [ 12.447870] __kasan_slab_free+0x56/0x70 [ 12.448049] kfree+0x222/0x3f0 [ 12.448221] kmalloc_uaf+0x12c/0x380 [ 12.448361] kunit_try_run_case+0x1a5/0x480 [ 12.448507] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.448827] kthread+0x337/0x6f0 [ 12.449000] ret_from_fork+0x116/0x1d0 [ 12.449185] ret_from_fork_asm+0x1a/0x30 [ 12.449386] [ 12.449488] The buggy address belongs to the object at ffff88810216cb40 [ 12.449488] which belongs to the cache kmalloc-16 of size 16 [ 12.449903] The buggy address is located 8 bytes inside of [ 12.449903] freed 16-byte region [ffff88810216cb40, ffff88810216cb50) [ 12.450442] [ 12.450542] The buggy address belongs to the physical page: [ 12.450761] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10216c [ 12.451100] flags: 0x200000000000000(node=0|zone=2) [ 12.451322] page_type: f5(slab) [ 12.451502] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.451809] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.452052] page dumped because: kasan: bad access detected [ 12.452223] [ 12.452300] Memory state around the buggy address: [ 12.452485] ffff88810216ca00: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc [ 12.452821] ffff88810216ca80: fa fb fc fc fa fb fc fc fa fb fc fc 00 05 fc fc [ 12.453143] >ffff88810216cb00: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 12.453390] ^ [ 12.453562] ffff88810216cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.453874] ffff88810216cc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.454217] ==================================================================