syzkaller login: [ 31.902820] BUG: Bad rss-counter state mm:00000000e86a41fd type:MM_FILEPAGES val:33 [ 31.904038] BUG: Bad rss-counter state mm:00000000e86a41fd type:MM_ANONPAGES val:22 [ 31.946276] ================================================================== [ 31.947268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.948205] Read of size 8 at addr ffff88800cad3a50 by task sshd/220 [ 31.948969] [ 31.949194] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.950156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.951124] Call Trace: [ 31.951444] [ 31.951731] dump_stack_lvl+0x91/0xf0 [ 31.952225] print_report+0xcc/0x620 [ 31.952712] ? __virt_addr_valid+0x102/0x340 [ 31.953269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.953908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.954524] kasan_report+0xbe/0xf0 [ 31.955007] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.955639] vma_interval_tree_remove+0xc75/0xec0 [ 31.956249] vma_prepare+0xc54/0x11a0 [ 31.956754] __split_vma+0x5af/0x950 [ 31.957260] ? __pfx___split_vma+0x10/0x10 [ 31.957854] ? find_held_lock+0x2c/0x110 [ 31.958402] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.959003] ? lock_is_held_type+0x9f/0x120 [ 31.959572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.960208] ? mtree_range_walk+0x632/0x900 [ 31.960792] ? mas_walk+0x5c7/0x7c0 [ 31.961304] do_vmi_munmap+0x1f1/0x2b0 [ 31.961832] mmap_region+0x1f9/0x2660 [ 31.962339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.962887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.963640] ? __pfx_lock_acquire+0x10/0x10 [ 31.964199] ? __pfx_mmap_region+0x10/0x10 [ 31.964760] ? security_mmap_addr+0x7d/0xa0 [ 31.965327] ? get_unmapped_area+0x1f5/0x3f0 [ 31.965904] do_mmap+0x854/0xf00 [ 31.966363] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.966884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.967484] ksys_mmap_pgoff+0x3af/0x500 [ 31.968012] do_syscall_64+0x3f/0x90 [ 31.968518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.969204] RIP: 0033:0x7f63d5ca8d82 [ 31.969703] 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 [ 31.971933] RSP: 002b:00007ffe13f096d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.972870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63d5ca8d82 [ 31.973776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63d50e2000 [ 31.974659] RBP: 00007f63d50e2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.975545] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a09127ec0 [ 31.976428] R13: 00007ffe13f096f0 R14: 00007ffe13f09720 R15: 00007ffe13f09a80 [ 31.977343] [ 31.977652] [ 31.977882] Allocated by task 213: [ 31.978342] kasan_save_stack+0x22/0x50 [ 31.978884] kasan_set_track+0x25/0x30 [ 31.979399] __kasan_slab_alloc+0x59/0x70 [ 31.979946] kmem_cache_alloc+0x16b/0x370 [ 31.980490] vm_area_dup+0x20/0x160 [ 31.980964] __split_vma+0x170/0x950 [ 31.981465] split_vma+0xc6/0x110 [ 31.981924] mprotect_fixup+0x8d2/0xb30 [ 31.982453] do_mprotect_pkey+0x87e/0xd40 [ 31.982994] __x64_sys_mprotect+0x78/0xc0 [ 31.983546] do_syscall_64+0x3f/0x90 [ 31.984047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.984719] [ 31.984945] Freed by task 213: [ 31.985370] kasan_save_stack+0x22/0x50 [ 31.985895] kasan_set_track+0x25/0x30 [ 31.986417] kasan_save_free_info+0x2b/0x50 [ 31.986983] __kasan_slab_free+0x10a/0x190 [ 31.987549] kmem_cache_free+0x10d/0x4d0 [ 31.988085] rcu_core+0x8c8/0x2860 [ 31.988547] __do_softirq+0x1b7/0x7d4 [ 31.989052] [ 31.989280] Last potentially related work creation: [ 31.989905] kasan_save_stack+0x22/0x50 [ 31.990435] __kasan_record_aux_stack+0x8e/0xa0 [ 31.991031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.991710] remove_vma+0x139/0x170 [ 31.992183] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.992770] do_vmi_munmap+0x1f1/0x2b0 [ 31.993284] __vm_munmap+0x138/0x3a0 [ 31.993803] __x64_sys_munmap+0x59/0x80 [ 31.994319] do_syscall_64+0x3f/0x90 [ 31.994827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.995501] [ 31.995739] The buggy address belongs to the object at ffff88800cad39f8 [ 31.995739] which belongs to the cache vm_area_struct of size 168 [ 31.997281] The buggy address is located 88 bytes inside of [ 31.997281] freed 168-byte region [ffff88800cad39f8, ffff88800cad3aa0) [ 31.998765] [ 31.998992] The buggy address belongs to the physical page: [ 31.999698] page:00000000a3fb5c02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcad3 [ 32.000834] memcg:ffff88800ec4f901 [ 32.001306] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.001998] page_type: 0xffffffff() [ 32.002467] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.003431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec4f901 [ 32.004381] page dumped because: kasan: bad access detected [ 32.005086] [ 32.005334] Memory state around the buggy address: [ 32.005949] ffff88800cad3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.006847] ffff88800cad3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.007754] >ffff88800cad3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.008642] ^ [ 32.009376] ffff88800cad3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.010274] ffff88800cad3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.011162] ================================================================== [ 32.012588] Disabling lock debugging due to kernel taint [ 34.238838] BUG: Bad rss-counter state mm:000000005fe1f9b2 type:MM_FILEPAGES val:33 [ 34.240013] BUG: Bad rss-counter state mm:000000005fe1f9b2 type:MM_ANONPAGES val:22 [ 34.618808] BUG: Bad rss-counter state mm:00000000c17f3abb type:MM_FILEPAGES val:33 [ 34.619993] BUG: Bad rss-counter state mm:00000000c17f3abb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47825' (ECDSA) to the list of known hosts. 2023/06/20 19:22:25 fuzzer started 2023/06/20 19:22:25 dialing manager at localhost:36067 2023/06/20 19:22:25 checking machine... 2023/06/20 19:22:25 checking revisions... [ 35.383103] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:22:25 testing simple program... [ 35.434258] cgroup: Unknown subsys name 'net' [ 35.487899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000009c RCX=00007f5cfe76b7b2 RDX=0000000000000000 RSI=0000000000000080 RDI=00005650979dee90 RBP=00005650979dee68 RSP=00007f5cfd92aac0 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000282 R12=0000000000000000 R13=00005650979dec50 R14=00005650979dee90 R15=00007f5cfd92aaf0 RIP=00007f5cfe76b7b8 RFL=00000207 [-----PC] 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 00007f5cfd92b700 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=00007f1b4efb77a0 CR3=000000000b8aa000 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=2035323a32323a3931203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323537353320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32323a3931203032 XMM08=00007f5cf40317a00000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81f34dcf RDX=ffff888017ddd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888010b5d1e0 RSP=ffff888019fb79b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888010b4fac8 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c0860 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 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 00007f88fc3f9900 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=00007ffd0f657000 CR3=0000000019f06000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000