Date
Nov. 20, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 37.210800] ================================================================== [ 37.212269] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 37.213321] Read of size 1 at addr fff00000c5a3bf20 by task kunit_try_catch/181 [ 37.215004] [ 37.215381] CPU: 1 UID: 0 PID: 181 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 37.216432] Tainted: [B]=BAD_PAGE, [N]=TEST [ 37.217016] Hardware name: linux,dummy-virt (DT) [ 37.217557] Call trace: [ 37.217970] show_stack+0x20/0x38 (C) [ 37.218614] dump_stack_lvl+0x8c/0xd0 [ 37.219152] print_report+0x118/0x5e0 [ 37.219766] kasan_report+0xc8/0x118 [ 37.220336] __kasan_check_byte+0x54/0x70 [ 37.220903] kfree_sensitive+0x30/0xb0 [ 37.221487] kmalloc_double_kzfree+0x168/0x308 [ 37.222078] kunit_try_run_case+0x14c/0x3d0 [ 37.222653] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.223323] kthread+0x24c/0x2d0 [ 37.223891] ret_from_fork+0x10/0x20 [ 37.224489] [ 37.224780] Allocated by task 181: [ 37.225280] kasan_save_stack+0x3c/0x68 [ 37.225863] kasan_save_track+0x20/0x40 [ 37.226416] kasan_save_alloc_info+0x40/0x58 [ 37.226930] __kasan_kmalloc+0xd4/0xd8 [ 37.227505] __kmalloc_cache_noprof+0x15c/0x3c8 [ 37.228106] kmalloc_double_kzfree+0xb8/0x308 [ 37.228705] kunit_try_run_case+0x14c/0x3d0 [ 37.229318] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.229894] kthread+0x24c/0x2d0 [ 37.230406] ret_from_fork+0x10/0x20 [ 37.230942] [ 37.231276] Freed by task 181: [ 37.231754] kasan_save_stack+0x3c/0x68 [ 37.232285] kasan_save_track+0x20/0x40 [ 37.232800] kasan_save_free_info+0x4c/0x78 [ 37.233396] __kasan_slab_free+0x6c/0x98 [ 37.234001] kfree+0x114/0x3d0 [ 37.234534] kfree_sensitive+0x80/0xb0 [ 37.235093] kmalloc_double_kzfree+0x11c/0x308 [ 37.235565] kunit_try_run_case+0x14c/0x3d0 [ 37.235843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.236133] kthread+0x24c/0x2d0 [ 37.236360] ret_from_fork+0x10/0x20 [ 37.236969] [ 37.237255] The buggy address belongs to the object at fff00000c5a3bf20 [ 37.237255] which belongs to the cache kmalloc-16 of size 16 [ 37.238377] The buggy address is located 0 bytes inside of [ 37.238377] freed 16-byte region [fff00000c5a3bf20, fff00000c5a3bf30) [ 37.239283] [ 37.239590] The buggy address belongs to the physical page: [ 37.240289] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a3b [ 37.241222] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 37.242043] page_type: f5(slab) [ 37.242585] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 37.243505] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 37.244268] page dumped because: kasan: bad access detected [ 37.244894] [ 37.245231] Memory state around the buggy address: [ 37.245875] fff00000c5a3be00: fa fb fc fc 00 02 fc fc fa fb fc fc fa fb fc fc [ 37.246557] fff00000c5a3be80: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 37.247404] >fff00000c5a3bf00: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 37.248254] ^ [ 37.248859] fff00000c5a3bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.249725] fff00000c5a3c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.250494] ==================================================================
[ 28.705418] ================================================================== [ 28.707367] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19d/0x360 [ 28.708129] Read of size 1 at addr ffff8881025fee80 by task kunit_try_catch/199 [ 28.708798] [ 28.709166] CPU: 1 UID: 0 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 28.710374] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.710920] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 28.711913] Call Trace: [ 28.712402] <TASK> [ 28.712757] dump_stack_lvl+0x73/0xb0 [ 28.713417] print_report+0xd1/0x640 [ 28.713988] ? __virt_addr_valid+0x1db/0x2d0 [ 28.714466] ? kasan_complete_mode_report_info+0x64/0x200 [ 28.715152] kasan_report+0x102/0x140 [ 28.715841] ? kmalloc_double_kzfree+0x19d/0x360 [ 28.716491] ? kmalloc_double_kzfree+0x19d/0x360 [ 28.717192] ? kmalloc_double_kzfree+0x19d/0x360 [ 28.717575] __kasan_check_byte+0x3d/0x50 [ 28.718050] kfree_sensitive+0x22/0x90 [ 28.718489] kmalloc_double_kzfree+0x19d/0x360 [ 28.719024] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 28.719803] ? __schedule+0xc3e/0x2790 [ 28.720379] ? __pfx_read_tsc+0x10/0x10 [ 28.720864] ? ktime_get_ts64+0x84/0x230 [ 28.721419] kunit_try_run_case+0x1b3/0x490 [ 28.721865] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.722443] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 28.722945] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 28.723443] ? __kthread_parkme+0x82/0x160 [ 28.724011] ? preempt_count_sub+0x50/0x80 [ 28.724501] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.725013] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 28.725885] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.726532] kthread+0x257/0x310 [ 28.726984] ? __pfx_kthread+0x10/0x10 [ 28.727386] ret_from_fork+0x41/0x80 [ 28.727906] ? __pfx_kthread+0x10/0x10 [ 28.728497] ret_from_fork_asm+0x1a/0x30 [ 28.729053] </TASK> [ 28.729417] [ 28.729682] Allocated by task 199: [ 28.730070] kasan_save_stack+0x3d/0x60 [ 28.730739] kasan_save_track+0x18/0x40 [ 28.731325] kasan_save_alloc_info+0x3b/0x50 [ 28.731771] __kasan_kmalloc+0xb7/0xc0 [ 28.732109] __kmalloc_cache_noprof+0x184/0x410 [ 28.732582] kmalloc_double_kzfree+0xaa/0x360 [ 28.733082] kunit_try_run_case+0x1b3/0x490 [ 28.733574] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.734228] kthread+0x257/0x310 [ 28.734724] ret_from_fork+0x41/0x80 [ 28.735711] ret_from_fork_asm+0x1a/0x30 [ 28.736578] [ 28.736791] Freed by task 199: [ 28.737161] kasan_save_stack+0x3d/0x60 [ 28.738238] kasan_save_track+0x18/0x40 [ 28.738757] kasan_save_free_info+0x3f/0x60 [ 28.739137] __kasan_slab_free+0x56/0x70 [ 28.739872] kfree+0x123/0x3f0 [ 28.740217] kfree_sensitive+0x67/0x90 [ 28.740717] kmalloc_double_kzfree+0x12c/0x360 [ 28.741133] kunit_try_run_case+0x1b3/0x490 [ 28.741617] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.742178] kthread+0x257/0x310 [ 28.742555] ret_from_fork+0x41/0x80 [ 28.743344] ret_from_fork_asm+0x1a/0x30 [ 28.743808] [ 28.744006] The buggy address belongs to the object at ffff8881025fee80 [ 28.744006] which belongs to the cache kmalloc-16 of size 16 [ 28.745304] The buggy address is located 0 bytes inside of [ 28.745304] freed 16-byte region [ffff8881025fee80, ffff8881025fee90) [ 28.746462] [ 28.746618] The buggy address belongs to the physical page: [ 28.747630] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025fe [ 28.748415] flags: 0x200000000000000(node=0|zone=2) [ 28.748848] page_type: f5(slab) [ 28.749253] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 28.749900] raw: 0000000000000000 0000000080800080 00000001f5000000 0000000000000000 [ 28.750551] page dumped because: kasan: bad access detected [ 28.751020] [ 28.751358] Memory state around the buggy address: [ 28.751819] ffff8881025fed80: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 28.752490] ffff8881025fee00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 28.752945] >ffff8881025fee80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.753674] ^ [ 28.754493] ffff8881025fef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.754961] ffff8881025fef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.755826] ==================================================================