syzkaller login: [ 31.170354] BUG: Bad rss-counter state mm:000000003046b5a5 type:MM_FILEPAGES val:33 [ 31.172036] BUG: Bad rss-counter state mm:000000003046b5a5 type:MM_ANONPAGES val:22 [ 31.337563] ================================================================== [ 31.338486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.339449] Read of size 8 at addr ffff8880190d0b38 by task sshd/219 [ 31.340227] [ 31.340520] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.341436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.342436] Call Trace: [ 31.342779] [ 31.343076] dump_stack_lvl+0x91/0xf0 [ 31.343579] print_report+0xcc/0x620 [ 31.344071] ? __virt_addr_valid+0x102/0x340 [ 31.344638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.345270] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.345889] kasan_report+0xbe/0xf0 [ 31.346374] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347003] vma_interval_tree_remove+0xc75/0xec0 [ 31.347621] vma_prepare+0xc54/0x11a0 [ 31.348109] __split_vma+0x5af/0x950 [ 31.348587] ? __pfx___split_vma+0x10/0x10 [ 31.349125] ? find_held_lock+0x2c/0x110 [ 31.349648] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.350215] ? lock_is_held_type+0x9f/0x120 [ 31.350761] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.351520] ? mtree_range_walk+0x632/0x900 [ 31.352066] ? mas_walk+0x5c7/0x7c0 [ 31.352535] do_vmi_munmap+0x1f1/0x2b0 [ 31.353025] mmap_region+0x1f9/0x2660 [ 31.353504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.354012] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.354714] ? __pfx_lock_acquire+0x10/0x10 [ 31.355252] ? __pfx_mmap_region+0x10/0x10 [ 31.355774] ? security_mmap_addr+0x7d/0xa0 [ 31.356299] ? get_unmapped_area+0x1f5/0x3f0 [ 31.356844] do_mmap+0x854/0xf00 [ 31.357281] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.357772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.358333] ksys_mmap_pgoff+0x3af/0x500 [ 31.358837] do_syscall_64+0x3f/0x90 [ 31.359318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359958] RIP: 0033:0x7fa951585d82 [ 31.360416] 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 [ 31.362504] RSP: 002b:00007ffd9f70ace8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.363411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa951585d82 [ 31.364253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9509bf000 [ 31.365090] RBP: 00007fa9509bf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.365933] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d025eb5d90 [ 31.366767] R13: 00007ffd9f70ad00 R14: 00007ffd9f70ad30 R15: 00007ffd9f70b090 [ 31.367626] [ 31.367917] [ 31.368134] Allocated by task 212: [ 31.368559] kasan_save_stack+0x22/0x50 [ 31.369061] kasan_set_track+0x25/0x30 [ 31.369557] __kasan_slab_alloc+0x59/0x70 [ 31.370082] kmem_cache_alloc+0x16b/0x370 [ 31.370597] vm_area_dup+0x20/0x160 [ 31.371065] __split_vma+0x170/0x950 [ 31.371532] split_vma+0xc6/0x110 [ 31.371969] mprotect_fixup+0x8d2/0xb30 [ 31.372468] do_mprotect_pkey+0x87e/0xd40 [ 31.372988] __x64_sys_mprotect+0x78/0xc0 [ 31.373511] do_syscall_64+0x3f/0x90 [ 31.373987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374630] [ 31.374846] Freed by task 212: [ 31.375250] kasan_save_stack+0x22/0x50 [ 31.375756] kasan_set_track+0x25/0x30 [ 31.376245] kasan_save_free_info+0x2b/0x50 [ 31.376772] __kasan_slab_free+0x10a/0x190 [ 31.377300] kmem_cache_free+0x10d/0x4d0 [ 31.377806] rcu_core+0x8c8/0x2860 [ 31.378247] __do_softirq+0x1b7/0x7d4 [ 31.378723] [ 31.378937] Last potentially related work creation: [ 31.379536] kasan_save_stack+0x22/0x50 [ 31.380039] __kasan_record_aux_stack+0x8e/0xa0 [ 31.380622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.381265] remove_vma+0x139/0x170 [ 31.381714] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.382271] do_vmi_munmap+0x1f1/0x2b0 [ 31.382756] __vm_munmap+0x138/0x3a0 [ 31.383225] __x64_sys_munmap+0x59/0x80 [ 31.383719] do_syscall_64+0x3f/0x90 [ 31.384191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384832] [ 31.385047] The buggy address belongs to the object at ffff8880190d0ae0 [ 31.385047] which belongs to the cache vm_area_struct of size 168 [ 31.386509] The buggy address is located 88 bytes inside of [ 31.386509] freed 168-byte region [ffff8880190d0ae0, ffff8880190d0b88) [ 31.387924] [ 31.388137] The buggy address belongs to the physical page: [ 31.388791] page:00000000a0f2ee08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x190d0 [ 31.389872] memcg:ffff88801661e101 [ 31.390290] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.390926] page_type: 0xffffffff() [ 31.391387] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.392285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801661e101 [ 31.393176] page dumped because: kasan: bad access detected [ 31.393823] [ 31.394034] Memory state around the buggy address: [ 31.394603] ffff8880190d0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.395445] ffff8880190d0a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.396280] >ffff8880190d0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.397134] ^ [ 31.397731] ffff8880190d0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.398569] ffff8880190d0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.399418] ================================================================== [ 31.400363] Disabling lock debugging due to kernel taint [ 33.368642] BUG: Bad rss-counter state mm:000000006f74d8d3 type:MM_FILEPAGES val:33 [ 33.369809] BUG: Bad rss-counter state mm:000000006f74d8d3 type:MM_ANONPAGES val:22 [ 33.741205] BUG: Bad rss-counter state mm:000000001bb7364a type:MM_FILEPAGES val:33 [ 33.742360] BUG: Bad rss-counter state mm:000000001bb7364a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15865' (ECDSA) to the list of known hosts. 2023/06/20 20:32:23 fuzzer started 2023/06/20 20:32:24 dialing manager at localhost:36067 2023/06/20 20:32:24 checking machine... 2023/06/20 20:32:24 checking revisions... [ 34.460433] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:32:24 testing simple program... [ 34.506405] cgroup: Unknown subsys name 'net' [ 34.552597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880193b7c50 RCX=0000000000000000 RDX=1ffff11003276f8b RSI=ffffffff81f2fd77 RDI=ffff8880193b7c58 RBP=ffff88800a33c0f8 RSP=ffff8880193b7948 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880193b7c38 R15=0000000000000000 RIP=ffffffff81f2fdc9 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 00007f56c17d2900 00000000 00000000 GS =0000 ffff88806ce00000 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=00007fffc7751000 CR3=000000000d72a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0b6b72fa20 CR3=000000001a156000 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=2033323a32333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000