Date
Dec. 6, 2024, 3:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.664136] ================================================================== [ 31.665493] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 31.666936] Read of size 1 at addr fff00000c5b518a0 by task kunit_try_catch/181 [ 31.668054] [ 31.668676] CPU: 0 UID: 0 PID: 181 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 31.669990] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.670626] Hardware name: linux,dummy-virt (DT) [ 31.671587] Call trace: [ 31.672042] show_stack+0x20/0x38 (C) [ 31.672766] dump_stack_lvl+0x8c/0xd0 [ 31.673398] print_report+0x118/0x5e0 [ 31.674059] kasan_report+0xc8/0x118 [ 31.674908] __kasan_check_byte+0x54/0x70 [ 31.675572] kfree_sensitive+0x30/0xb0 [ 31.676286] kmalloc_double_kzfree+0x168/0x308 [ 31.677010] kunit_try_run_case+0x14c/0x3d0 [ 31.677719] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.678568] kthread+0x24c/0x2d0 [ 31.679152] ret_from_fork+0x10/0x20 [ 31.679815] [ 31.680162] Allocated by task 181: [ 31.680811] kasan_save_stack+0x3c/0x68 [ 31.681484] kasan_save_track+0x20/0x40 [ 31.682050] kasan_save_alloc_info+0x40/0x58 [ 31.683058] __kasan_kmalloc+0xd4/0xd8 [ 31.683838] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.684546] kmalloc_double_kzfree+0xb8/0x308 [ 31.685265] kunit_try_run_case+0x14c/0x3d0 [ 31.685987] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.686977] kthread+0x24c/0x2d0 [ 31.687567] ret_from_fork+0x10/0x20 [ 31.688427] [ 31.688909] Freed by task 181: [ 31.689530] kasan_save_stack+0x3c/0x68 [ 31.690150] kasan_save_track+0x20/0x40 [ 31.690698] kasan_save_free_info+0x4c/0x78 [ 31.691292] __kasan_slab_free+0x6c/0x98 [ 31.692184] kfree+0x114/0x3c8 [ 31.692752] kfree_sensitive+0x80/0xb0 [ 31.693318] kmalloc_double_kzfree+0x11c/0x308 [ 31.693959] kunit_try_run_case+0x14c/0x3d0 [ 31.694880] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.695718] kthread+0x24c/0x2d0 [ 31.696274] ret_from_fork+0x10/0x20 [ 31.696931] [ 31.697310] The buggy address belongs to the object at fff00000c5b518a0 [ 31.697310] which belongs to the cache kmalloc-16 of size 16 [ 31.698985] The buggy address is located 0 bytes inside of [ 31.698985] freed 16-byte region [fff00000c5b518a0, fff00000c5b518b0) [ 31.700250] [ 31.700677] The buggy address belongs to the physical page: [ 31.701328] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105b51 [ 31.702555] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.703344] page_type: f5(slab) [ 31.703840] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 31.704896] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 31.705784] page dumped because: kasan: bad access detected [ 31.706099] [ 31.706720] Memory state around the buggy address: [ 31.707212] fff00000c5b51780: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.708400] fff00000c5b51800: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 31.709424] >fff00000c5b51880: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 31.710335] ^ [ 31.710859] fff00000c5b51900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.711848] fff00000c5b51980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.712648] ==================================================================
[ 24.283377] ================================================================== [ 24.284771] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19d/0x360 [ 24.286015] Read of size 1 at addr ffff888101fff700 by task kunit_try_catch/200 [ 24.286565] [ 24.286747] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241206 #1 [ 24.287760] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.288068] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.290003] Call Trace: [ 24.290625] <TASK> [ 24.291217] dump_stack_lvl+0x73/0xb0 [ 24.292206] print_report+0xd1/0x640 [ 24.292860] ? __virt_addr_valid+0x1db/0x2d0 [ 24.293625] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.294394] kasan_report+0x102/0x140 [ 24.294900] ? kmalloc_double_kzfree+0x19d/0x360 [ 24.295520] ? kmalloc_double_kzfree+0x19d/0x360 [ 24.296620] ? kmalloc_double_kzfree+0x19d/0x360 [ 24.297098] __kasan_check_byte+0x3d/0x50 [ 24.297686] kfree_sensitive+0x22/0x90 [ 24.298385] kmalloc_double_kzfree+0x19d/0x360 [ 24.298870] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 24.299459] ? __schedule+0xc70/0x27e0 [ 24.300926] ? __pfx_read_tsc+0x10/0x10 [ 24.301269] ? ktime_get_ts64+0x86/0x230 [ 24.302495] kunit_try_run_case+0x1b3/0x490 [ 24.303339] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.303677] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 24.304883] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.305303] ? __kthread_parkme+0x82/0x160 [ 24.305882] ? preempt_count_sub+0x50/0x80 [ 24.306247] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.307630] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.308365] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.309164] kthread+0x257/0x310 [ 24.309841] ? __pfx_kthread+0x10/0x10 [ 24.310240] ret_from_fork+0x41/0x80 [ 24.310761] ? __pfx_kthread+0x10/0x10 [ 24.311468] ret_from_fork_asm+0x1a/0x30 [ 24.313021] </TASK> [ 24.313858] [ 24.314141] Allocated by task 200: [ 24.314422] kasan_save_stack+0x3d/0x60 [ 24.315461] kasan_save_track+0x18/0x40 [ 24.316522] kasan_save_alloc_info+0x3b/0x50 [ 24.317154] __kasan_kmalloc+0xb7/0xc0 [ 24.317558] __kmalloc_cache_noprof+0x184/0x410 [ 24.318043] kmalloc_double_kzfree+0xaa/0x360 [ 24.320337] kunit_try_run_case+0x1b3/0x490 [ 24.320881] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.321890] kthread+0x257/0x310 [ 24.322261] ret_from_fork+0x41/0x80 [ 24.323255] ret_from_fork_asm+0x1a/0x30 [ 24.324154] [ 24.324269] Freed by task 200: [ 24.324419] kasan_save_stack+0x3d/0x60 [ 24.325407] kasan_save_track+0x18/0x40 [ 24.325973] kasan_save_free_info+0x3f/0x60 [ 24.326530] __kasan_slab_free+0x56/0x70 [ 24.327318] kfree+0x123/0x3f0 [ 24.327908] kfree_sensitive+0x67/0x90 [ 24.328919] kmalloc_double_kzfree+0x12c/0x360 [ 24.330068] kunit_try_run_case+0x1b3/0x490 [ 24.330957] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.331793] kthread+0x257/0x310 [ 24.333236] ret_from_fork+0x41/0x80 [ 24.334406] ret_from_fork_asm+0x1a/0x30 [ 24.335140] [ 24.335763] The buggy address belongs to the object at ffff888101fff700 [ 24.335763] which belongs to the cache kmalloc-16 of size 16 [ 24.337161] The buggy address is located 0 bytes inside of [ 24.337161] freed 16-byte region [ffff888101fff700, ffff888101fff710) [ 24.339310] [ 24.339589] The buggy address belongs to the physical page: [ 24.341009] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101fff [ 24.342093] flags: 0x200000000000000(node=0|zone=2) [ 24.343047] page_type: f5(slab) [ 24.343528] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 24.345183] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 24.347229] page dumped because: kasan: bad access detected [ 24.347972] [ 24.348430] Memory state around the buggy address: [ 24.349332] ffff888101fff600: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 24.350576] ffff888101fff680: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc [ 24.352193] >ffff888101fff700: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.353491] ^ [ 24.354121] ffff888101fff780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.355544] ffff888101fff800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.357048] ==================================================================