Date
May 29, 2025, 7:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.873007] ================================================================== [ 21.873202] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 21.873381] Read of size 1 at addr fff00000c66b10a8 by task kunit_try_catch/184 [ 21.873506] [ 21.873602] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT [ 21.873814] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.873884] Hardware name: linux,dummy-virt (DT) [ 21.873965] Call trace: [ 21.874023] show_stack+0x20/0x38 (C) [ 21.874149] dump_stack_lvl+0x8c/0xd0 [ 21.874277] print_report+0x118/0x608 [ 21.874467] kasan_report+0xdc/0x128 [ 21.874728] __asan_report_load1_noabort+0x20/0x30 [ 21.874863] kmalloc_uaf+0x300/0x338 [ 21.874965] kunit_try_run_case+0x170/0x3f0 [ 21.875095] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.875330] kthread+0x328/0x630 [ 21.875501] ret_from_fork+0x10/0x20 [ 21.875686] [ 21.875754] Allocated by task 184: [ 21.875854] kasan_save_stack+0x3c/0x68 [ 21.876008] kasan_save_track+0x20/0x40 [ 21.876085] kasan_save_alloc_info+0x40/0x58 [ 21.876154] __kasan_kmalloc+0xd4/0xd8 [ 21.876218] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.876326] kmalloc_uaf+0xb8/0x338 [ 21.876407] kunit_try_run_case+0x170/0x3f0 [ 21.876540] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.876640] kthread+0x328/0x630 [ 21.876722] ret_from_fork+0x10/0x20 [ 21.876799] [ 21.876849] Freed by task 184: [ 21.876925] kasan_save_stack+0x3c/0x68 [ 21.877022] kasan_save_track+0x20/0x40 [ 21.877105] kasan_save_free_info+0x4c/0x78 [ 21.877179] __kasan_slab_free+0x6c/0x98 [ 21.877258] kfree+0x214/0x3c8 [ 21.877334] kmalloc_uaf+0x11c/0x338 [ 21.877479] kunit_try_run_case+0x170/0x3f0 [ 21.877600] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.877714] kthread+0x328/0x630 [ 21.877800] ret_from_fork+0x10/0x20 [ 21.877888] [ 21.878066] The buggy address belongs to the object at fff00000c66b10a0 [ 21.878066] which belongs to the cache kmalloc-16 of size 16 [ 21.878863] The buggy address is located 8 bytes inside of [ 21.878863] freed 16-byte region [fff00000c66b10a0, fff00000c66b10b0) [ 21.879134] [ 21.879320] The buggy address belongs to the physical page: [ 21.879484] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066b1 [ 21.880366] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.880785] page_type: f5(slab) [ 21.880982] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 21.881369] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 21.881813] page dumped because: kasan: bad access detected [ 21.881936] [ 21.882021] Memory state around the buggy address: [ 21.882250] fff00000c66b0f80: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc [ 21.882878] fff00000c66b1000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 21.883143] >fff00000c66b1080: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 21.883259] ^ [ 21.883346] fff00000c66b1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.883462] fff00000c66b1180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.883540] ==================================================================
[ 11.103024] ================================================================== [ 11.103822] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.104444] Read of size 1 at addr ffff888101c55fa8 by task kunit_try_catch/201 [ 11.104822] [ 11.104922] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250529 #1 PREEMPT(voluntary) [ 11.104969] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.105049] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.105091] Call Trace: [ 11.105103] <TASK> [ 11.105117] dump_stack_lvl+0x73/0xb0 [ 11.105144] print_report+0xd1/0x650 [ 11.105166] ? __virt_addr_valid+0x1db/0x2d0 [ 11.105188] ? kmalloc_uaf+0x320/0x380 [ 11.105208] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.105230] ? kmalloc_uaf+0x320/0x380 [ 11.105251] kasan_report+0x141/0x180 [ 11.105273] ? kmalloc_uaf+0x320/0x380 [ 11.105298] __asan_report_load1_noabort+0x18/0x20 [ 11.105318] kmalloc_uaf+0x320/0x380 [ 11.105339] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.105359] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 11.105402] ? trace_hardirqs_on+0x37/0xe0 [ 11.105437] ? __pfx_read_tsc+0x10/0x10 [ 11.105458] ? ktime_get_ts64+0x86/0x230 [ 11.105483] kunit_try_run_case+0x1a5/0x480 [ 11.105505] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.105526] ? queued_spin_lock_slowpath+0x116/0xb40 [ 11.105550] ? __kthread_parkme+0x82/0x180 [ 11.105570] ? preempt_count_sub+0x50/0x80 [ 11.105594] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.105627] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.105651] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.105675] kthread+0x337/0x6f0 [ 11.105694] ? trace_preempt_on+0x20/0xc0 [ 11.105715] ? __pfx_kthread+0x10/0x10 [ 11.105737] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.105809] ? calculate_sigpending+0x7b/0xa0 [ 11.105834] ? __pfx_kthread+0x10/0x10 [ 11.105856] ret_from_fork+0x116/0x1d0 [ 11.105874] ? __pfx_kthread+0x10/0x10 [ 11.105894] ret_from_fork_asm+0x1a/0x30 [ 11.105925] </TASK> [ 11.105935] [ 11.114414] Allocated by task 201: [ 11.114555] kasan_save_stack+0x45/0x70 [ 11.114889] kasan_save_track+0x18/0x40 [ 11.115221] kasan_save_alloc_info+0x3b/0x50 [ 11.115437] __kasan_kmalloc+0xb7/0xc0 [ 11.115642] __kmalloc_cache_noprof+0x189/0x420 [ 11.115833] kmalloc_uaf+0xaa/0x380 [ 11.116181] kunit_try_run_case+0x1a5/0x480 [ 11.116467] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.116674] kthread+0x337/0x6f0 [ 11.116803] ret_from_fork+0x116/0x1d0 [ 11.116987] ret_from_fork_asm+0x1a/0x30 [ 11.117232] [ 11.117434] Freed by task 201: [ 11.117661] kasan_save_stack+0x45/0x70 [ 11.117996] kasan_save_track+0x18/0x40 [ 11.118264] kasan_save_free_info+0x3f/0x60 [ 11.118453] __kasan_slab_free+0x56/0x70 [ 11.118604] kfree+0x222/0x3f0 [ 11.118736] kmalloc_uaf+0x12c/0x380 [ 11.118909] kunit_try_run_case+0x1a5/0x480 [ 11.119139] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.119428] kthread+0x337/0x6f0 [ 11.119626] ret_from_fork+0x116/0x1d0 [ 11.120054] ret_from_fork_asm+0x1a/0x30 [ 11.120436] [ 11.120518] The buggy address belongs to the object at ffff888101c55fa0 [ 11.120518] which belongs to the cache kmalloc-16 of size 16 [ 11.121277] The buggy address is located 8 bytes inside of [ 11.121277] freed 16-byte region [ffff888101c55fa0, ffff888101c55fb0) [ 11.121663] [ 11.121817] The buggy address belongs to the physical page: [ 11.122123] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c55 [ 11.122525] flags: 0x200000000000000(node=0|zone=2) [ 11.122831] page_type: f5(slab) [ 11.123026] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.123268] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.123640] page dumped because: kasan: bad access detected [ 11.123900] [ 11.124142] Memory state around the buggy address: [ 11.124390] ffff888101c55e80: 00 00 fc fc 00 02 fc fc 00 02 fc fc 00 06 fc fc [ 11.124682] ffff888101c55f00: 00 06 fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 11.125025] >ffff888101c55f80: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 11.125293] ^ [ 11.125753] ffff888101c56000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 11.126216] ffff888101c56080: 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 11.126552] ==================================================================