Date
June 17, 2025, 3:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 95.833771] ================================================================== [ 95.835695] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0xc8/0x1d8 [ 95.836992] Read of size 1 at addr ffff0000c5c52740 by task kunit_try_catch/211 [ 95.838239] [ 95.838778] CPU: 1 PID: 211 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 95.840232] Hardware name: linux,dummy-virt (DT) [ 95.841797] Call trace: [ 95.842529] dump_backtrace+0x9c/0x128 [ 95.843398] show_stack+0x20/0x38 [ 95.844058] dump_stack_lvl+0x60/0xb0 [ 95.846100] print_report+0xf8/0x5e8 [ 95.848506] kasan_report+0xdc/0x128 [ 95.849462] __kasan_check_byte+0x54/0x70 [ 95.851887] kfree_sensitive+0x30/0xb0 [ 95.853483] kmalloc_double_kzfree+0xc8/0x1d8 [ 95.854473] kunit_try_run_case+0x114/0x298 [ 95.855833] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 95.857132] kthread+0x18c/0x1a8 [ 95.857939] ret_from_fork+0x10/0x20 [ 95.859363] [ 95.859691] Allocated by task 211: [ 95.860499] kasan_save_stack+0x3c/0x68 [ 95.861350] kasan_set_track+0x2c/0x40 [ 95.862165] kasan_save_alloc_info+0x24/0x38 [ 95.863277] __kasan_kmalloc+0xd4/0xd8 [ 95.864109] kmalloc_trace+0x68/0x130 [ 95.864881] kmalloc_double_kzfree+0x9c/0x1d8 [ 95.865773] kunit_try_run_case+0x114/0x298 [ 95.866656] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 95.867697] kthread+0x18c/0x1a8 [ 95.868532] ret_from_fork+0x10/0x20 [ 95.869327] [ 95.869756] Freed by task 211: [ 95.870324] kasan_save_stack+0x3c/0x68 [ 95.871271] kasan_set_track+0x2c/0x40 [ 95.872537] kasan_save_free_info+0x38/0x60 [ 95.873595] __kasan_slab_free+0x100/0x170 [ 95.874367] __kmem_cache_free+0x178/0x2c8 [ 95.875364] kfree+0x74/0x138 [ 95.876193] kfree_sensitive+0x80/0xb0 [ 95.876881] kmalloc_double_kzfree+0xb8/0x1d8 [ 95.877924] kunit_try_run_case+0x114/0x298 [ 95.878888] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 95.880323] kthread+0x18c/0x1a8 [ 95.881105] ret_from_fork+0x10/0x20 [ 95.882210] [ 95.882710] The buggy address belongs to the object at ffff0000c5c52740 [ 95.882710] which belongs to the cache kmalloc-16 of size 16 [ 95.884753] The buggy address is located 0 bytes inside of [ 95.884753] freed 16-byte region [ffff0000c5c52740, ffff0000c5c52750) [ 95.886321] [ 95.887096] The buggy address belongs to the physical page: [ 95.887898] page:00000000fbf36b17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105c52 [ 95.889531] flags: 0xbfffc0000000800(slab|node=0|zone=2|lastcpupid=0xffff) [ 95.891080] page_type: 0xffffffff() [ 95.892372] raw: 0bfffc0000000800 ffff0000c00013c0 dead000000000122 0000000000000000 [ 95.893690] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 [ 95.894677] page dumped because: kasan: bad access detected [ 95.896271] [ 95.896813] Memory state around the buggy address: [ 95.897592] ffff0000c5c52600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 95.898060] ffff0000c5c52680: 00 04 fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 95.898717] >ffff0000c5c52700: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 95.900288] ^ [ 95.901457] ffff0000c5c52780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.902454] ffff0000c5c52800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.903520] ==================================================================
[ 36.277562] ================================================================== [ 36.279638] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0xd4/0x1d0 [ 36.281484] Read of size 1 at addr ffff88810214e700 by task kunit_try_catch/226 [ 36.282972] [ 36.283419] CPU: 0 PID: 226 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 36.284008] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 36.284587] Call Trace: [ 36.285155] <TASK> [ 36.285599] dump_stack_lvl+0x4e/0x90 [ 36.286320] print_report+0xd2/0x650 [ 36.286902] ? __virt_addr_valid+0x156/0x1e0 [ 36.287342] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 36.287642] ? kasan_complete_mode_report_info+0x64/0x200 [ 36.287994] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 36.288278] kasan_report+0x147/0x180 [ 36.288515] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 36.288804] ? kmalloc_double_kzfree+0xd4/0x1d0 [ 36.289949] __kasan_check_byte+0x3d/0x50 [ 36.290595] kfree_sensitive+0x22/0x90 [ 36.290981] kmalloc_double_kzfree+0xd4/0x1d0 [ 36.291638] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 36.291981] ? __schedule+0x715/0x11a0 [ 36.292414] ? ktime_get_ts64+0x118/0x140 [ 36.293016] kunit_try_run_case+0x120/0x290 [ 36.293318] ? __pfx_kunit_try_run_case+0x10/0x10 [ 36.294182] ? __kasan_check_write+0x18/0x20 [ 36.294605] ? trace_preempt_on+0x20/0xa0 [ 36.295124] ? __kthread_parkme+0x4f/0xd0 [ 36.295605] ? preempt_count_sub+0x50/0x80 [ 36.296046] ? __pfx_kunit_try_run_case+0x10/0x10 [ 36.296605] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 36.297135] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 36.297968] kthread+0x19e/0x1e0 [ 36.298261] ? __pfx_kthread+0x10/0x10 [ 36.298796] ret_from_fork+0x41/0x70 [ 36.299192] ? __pfx_kthread+0x10/0x10 [ 36.299692] ret_from_fork_asm+0x1b/0x30 [ 36.300126] </TASK> [ 36.300537] [ 36.300669] Allocated by task 226: [ 36.301188] kasan_save_stack+0x44/0x70 [ 36.301876] kasan_set_track+0x29/0x40 [ 36.302336] kasan_save_alloc_info+0x22/0x30 [ 36.302645] __kasan_kmalloc+0xb7/0xc0 [ 36.303161] kmalloc_trace+0x4c/0xb0 [ 36.303630] kmalloc_double_kzfree+0x9d/0x1d0 [ 36.304075] kunit_try_run_case+0x120/0x290 [ 36.304632] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 36.305103] kthread+0x19e/0x1e0 [ 36.305512] ret_from_fork+0x41/0x70 [ 36.306270] ret_from_fork_asm+0x1b/0x30 [ 36.306639] [ 36.306787] Freed by task 226: [ 36.306998] kasan_save_stack+0x44/0x70 [ 36.307244] kasan_set_track+0x29/0x40 [ 36.307931] kasan_save_free_info+0x2f/0x50 [ 36.308340] ____kasan_slab_free+0x172/0x1d0 [ 36.308849] __kasan_slab_free+0x16/0x20 [ 36.309231] __kmem_cache_free+0x190/0x310 [ 36.309982] kfree+0x7c/0x120 [ 36.310312] kfree_sensitive+0x67/0x90 [ 36.310599] kmalloc_double_kzfree+0xbd/0x1d0 [ 36.311158] kunit_try_run_case+0x120/0x290 [ 36.311645] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 36.312142] kthread+0x19e/0x1e0 [ 36.312370] ret_from_fork+0x41/0x70 [ 36.312922] ret_from_fork_asm+0x1b/0x30 [ 36.313306] [ 36.313844] The buggy address belongs to the object at ffff88810214e700 [ 36.313844] which belongs to the cache kmalloc-16 of size 16 [ 36.314835] The buggy address is located 0 bytes inside of [ 36.314835] freed 16-byte region [ffff88810214e700, ffff88810214e710) [ 36.315668] [ 36.315939] The buggy address belongs to the physical page: [ 36.316393] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10214e [ 36.317134] flags: 0x200000000000800(slab|node=0|zone=2) [ 36.318002] page_type: 0xffffffff() [ 36.318239] raw: 0200000000000800 ffff8881000413c0 dead000000000122 0000000000000000 [ 36.318985] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 [ 36.319659] page dumped because: kasan: bad access detected [ 36.320114] [ 36.320505] Memory state around the buggy address: [ 36.320793] ffff88810214e600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 36.321375] ffff88810214e680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 36.322237] >ffff88810214e700: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.322819] ^ [ 36.323191] ffff88810214e780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.323805] ffff88810214e800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.324446] ==================================================================