syzkaller login: [ 44.508848] BUG: Bad rss-counter state mm:00000000f6286655 type:MM_FILEPAGES val:33 [ 44.510495] BUG: Bad rss-counter state mm:00000000f6286655 type:MM_ANONPAGES val:22 [ 44.649469] ================================================================== [ 44.650389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.651369] Read of size 8 at addr ffff88800e36a3f8 by task sshd/220 [ 44.652125] [ 44.652516] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.653370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.654327] Call Trace: [ 44.654732] [ 44.655015] dump_stack_lvl+0x91/0xf0 [ 44.655522] print_report+0xcc/0x620 [ 44.656002] ? __virt_addr_valid+0x102/0x340 [ 44.656560] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.657223] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.657862] kasan_report+0xbe/0xf0 [ 44.658334] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.658988] vma_interval_tree_remove+0xc75/0xec0 [ 44.659630] vma_prepare+0xc54/0x11a0 [ 44.660114] __split_vma+0x5af/0x950 [ 44.660595] ? __pfx___split_vma+0x10/0x10 [ 44.661136] ? find_held_lock+0x2c/0x110 [ 44.661657] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.662260] ? lock_is_held_type+0x9f/0x120 [ 44.662867] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.663477] ? mtree_range_walk+0x632/0x900 [ 44.664039] ? mas_walk+0x5c7/0x7c0 [ 44.664514] do_vmi_munmap+0x1f1/0x2b0 [ 44.665007] mmap_region+0x1f9/0x2660 [ 44.665488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.666003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.666765] ? __pfx_lock_acquire+0x10/0x10 [ 44.667312] ? __pfx_mmap_region+0x10/0x10 [ 44.667887] ? security_mmap_addr+0x7d/0xa0 [ 44.668438] ? get_unmapped_area+0x1f5/0x3f0 [ 44.669000] do_mmap+0x854/0xf00 [ 44.669456] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.669952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.670529] ksys_mmap_pgoff+0x3af/0x500 [ 44.671065] do_syscall_64+0x3f/0x90 [ 44.671586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.672231] RIP: 0033:0x7f544adabd82 [ 44.672691] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 44.674871] RSP: 002b:00007ffc54428128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.675851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f544adabd82 [ 44.676716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f544a1e5000 [ 44.677561] RBP: 00007f544a1e5000 R08: 0000000000000009 R09: 0000000000001000 [ 44.678447] R10: 0000000000000812 R11: 0000000000000206 R12: 000056221fca1d90 [ 44.679328] R13: 00007ffc54428140 R14: 00007ffc54428170 R15: 00007ffc544284d0 [ 44.680272] [ 44.680571] [ 44.680785] Allocated by task 213: [ 44.681218] kasan_save_stack+0x22/0x50 [ 44.681752] kasan_set_track+0x25/0x30 [ 44.682256] __kasan_slab_alloc+0x59/0x70 [ 44.682833] kmem_cache_alloc+0x16b/0x370 [ 44.683347] vm_area_dup+0x20/0x160 [ 44.683841] __split_vma+0x170/0x950 [ 44.684352] split_vma+0xc6/0x110 [ 44.684799] mprotect_fixup+0x8d2/0xb30 [ 44.685338] do_mprotect_pkey+0x87e/0xd40 [ 44.685895] __x64_sys_mprotect+0x78/0xc0 [ 44.686426] do_syscall_64+0x3f/0x90 [ 44.686958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.687640] [ 44.687859] Freed by task 13: [ 44.688246] kasan_save_stack+0x22/0x50 [ 44.688790] kasan_set_track+0x25/0x30 [ 44.689290] kasan_save_free_info+0x2b/0x50 [ 44.689852] __kasan_slab_free+0x10a/0x190 [ 44.690416] kmem_cache_free+0x10d/0x4d0 [ 44.690945] rcu_core+0x8c8/0x2860 [ 44.691396] __do_softirq+0x1b7/0x7d4 [ 44.691873] [ 44.692088] Last potentially related work creation: [ 44.692712] kasan_save_stack+0x22/0x50 [ 44.693317] __kasan_record_aux_stack+0x8e/0xa0 [ 44.693931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.694609] remove_vma+0x139/0x170 [ 44.695090] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.695648] do_vmi_munmap+0x1f1/0x2b0 [ 44.696175] __vm_munmap+0x138/0x3a0 [ 44.696651] __x64_sys_munmap+0x59/0x80 [ 44.697151] do_syscall_64+0x3f/0x90 [ 44.697675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.698363] [ 44.698589] The buggy address belongs to the object at ffff88800e36a3a0 [ 44.698589] which belongs to the cache vm_area_struct of size 168 [ 44.700125] The buggy address is located 88 bytes inside of [ 44.700125] freed 168-byte region [ffff88800e36a3a0, ffff88800e36a448) [ 44.701651] [ 44.701912] The buggy address belongs to the physical page: [ 44.702614] page:00000000ea282d96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe36a [ 44.703830] memcg:ffff88800c946401 [ 44.704282] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.704965] page_type: 0xffffffff() [ 44.705508] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.706495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c946401 [ 44.707476] page dumped because: kasan: bad access detected [ 44.708219] [ 44.708455] Memory state around the buggy address: [ 44.709086] ffff88800e36a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 44.710021] ffff88800e36a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 44.710957] >ffff88800e36a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.711891] ^ [ 44.712812] ffff88800e36a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.713745] ffff88800e36a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.714685] ================================================================== [ 44.715755] Disabling lock debugging due to kernel taint [ 46.926869] BUG: Bad rss-counter state mm:000000005736d42f type:MM_FILEPAGES val:33 [ 46.927616] BUG: Bad rss-counter state mm:000000005736d42f type:MM_ANONPAGES val:22 [ 47.353795] BUG: Bad rss-counter state mm:0000000073c018c9 type:MM_FILEPAGES val:33 [ 47.354541] BUG: Bad rss-counter state mm:0000000073c018c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28850' (ECDSA) to the list of known hosts. 2023/06/20 03:25:48 fuzzer started 2023/06/20 03:25:48 dialing manager at localhost:44161 2023/06/20 03:25:48 checking machine... 2023/06/20 03:25:48 checking revisions... [ 48.095228] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:25:48 testing simple program... [ 48.128674] cgroup: Unknown subsys name 'net' [ 48.160703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00005641f261eed0 RCX=0000000000000000 RDX=00000000fbad2488 RSI=00005641f262ce90 RDI=0000000000000000 RBP=00005641f2617770 RSP=00007ffde0a2be20 R8 =00005641f262ce90 R9 =00007fd6e6ddfbe0 R10=0000000040000000 R11=0000000000000000 R12=00005641f2617b70 R13=0000000000000000 R14=0000000000000000 R15=00005641f261eed0 RIP=00007fd6e6ca299c RFL=00000213 [----A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd6e682d900 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd6e6de50b0 CR3=0000000017cae000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa55ba85a20 CR3=000000000c624000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=c0dadf8ff07f3bbda94b42f306d084f3 XMM02=000000000011c7f8ec2efd57dc4c00df XMM03=000000000012414067778077d064cc7e XMM04=abe6a37cda1a7f7400000000000ae988 XMM05=19e9129bd510f2350000000000133cf0 XMM06=6489d221cdc169050000000000132b58 XMM07=e042d86d42eb936e00000000001243c0 XMM08=67778077d064cc7e000000000011c858 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000