syzkaller login: [ 39.132478] BUG: Bad rss-counter state mm:00000000f683d85a type:MM_FILEPAGES val:33 [ 39.133730] BUG: Bad rss-counter state mm:00000000f683d85a type:MM_ANONPAGES val:22 [ 39.173435] ================================================================== [ 39.174445] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.175473] Read of size 8 at addr ffff888009526d08 by task sshd/218 [ 39.176310] [ 39.176625] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.177558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.178546] Call Trace: [ 39.178873] [ 39.179165] dump_stack_lvl+0x91/0xf0 [ 39.179777] print_report+0xcc/0x620 [ 39.180267] ? __virt_addr_valid+0x102/0x340 [ 39.180868] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.181614] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.182236] kasan_report+0xbe/0xf0 [ 39.182791] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.183483] vma_interval_tree_remove+0xc75/0xec0 [ 39.184197] vma_prepare+0xc54/0x11a0 [ 39.184713] __split_vma+0x5af/0x950 [ 39.185196] ? __pfx___split_vma+0x10/0x10 [ 39.185756] ? find_held_lock+0x2c/0x110 [ 39.186276] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.186851] ? lock_is_held_type+0x9f/0x120 [ 39.187386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.188002] ? mtree_range_walk+0x632/0x900 [ 39.188567] ? mas_walk+0x5c7/0x7c0 [ 39.189060] do_vmi_munmap+0x1f1/0x2b0 [ 39.189590] mmap_region+0x1f9/0x2660 [ 39.190075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.190624] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.191337] ? __pfx_lock_acquire+0x10/0x10 [ 39.192003] ? __pfx_mmap_region+0x10/0x10 [ 39.192661] ? security_mmap_addr+0x7d/0xa0 [ 39.193238] ? get_unmapped_area+0x1f5/0x3f0 [ 39.193815] do_mmap+0x854/0xf00 [ 39.194258] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.194781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.195340] ksys_mmap_pgoff+0x3af/0x500 [ 39.195861] do_syscall_64+0x3f/0x90 [ 39.196353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.197040] RIP: 0033:0x7f4dd4c0bd82 [ 39.197514] 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 [ 39.199692] RSP: 002b:00007ffda24b00f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.200599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dd4c0bd82 [ 39.201454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dd4045000 [ 39.202311] RBP: 00007f4dd4045000 R08: 0000000000000009 R09: 0000000000001000 [ 39.203175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a57897fec0 [ 39.204032] R13: 00007ffda24b0110 R14: 00007ffda24b0140 R15: 00007ffda24b04a0 [ 39.204891] [ 39.205211] [ 39.205424] Allocated by task 211: [ 39.205861] kasan_save_stack+0x22/0x50 [ 39.206362] kasan_set_track+0x25/0x30 [ 39.206886] __kasan_slab_alloc+0x59/0x70 [ 39.207469] kmem_cache_alloc+0x16b/0x370 [ 39.208033] vm_area_dup+0x20/0x160 [ 39.208515] __split_vma+0x170/0x950 [ 39.209005] split_vma+0xc6/0x110 [ 39.209469] mprotect_fixup+0x8d2/0xb30 [ 39.210010] do_mprotect_pkey+0x87e/0xd40 [ 39.210569] __x64_sys_mprotect+0x78/0xc0 [ 39.211109] do_syscall_64+0x3f/0x90 [ 39.211608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.212278] [ 39.212507] Freed by task 211: [ 39.213024] kasan_save_stack+0x22/0x50 [ 39.213680] kasan_set_track+0x25/0x30 [ 39.214324] kasan_save_free_info+0x2b/0x50 [ 39.215038] __kasan_slab_free+0x10a/0x190 [ 39.215756] kmem_cache_free+0x10d/0x4d0 [ 39.216417] rcu_core+0x8c8/0x2860 [ 39.217037] __do_softirq+0x1b7/0x7d4 [ 39.217645] [ 39.217871] Last potentially related work creation: [ 39.218522] kasan_save_stack+0x22/0x50 [ 39.219047] __kasan_record_aux_stack+0x8e/0xa0 [ 39.219628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.220269] remove_vma+0x139/0x170 [ 39.220731] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.221303] do_vmi_munmap+0x1f1/0x2b0 [ 39.221808] __vm_munmap+0x138/0x3a0 [ 39.222270] __x64_sys_munmap+0x59/0x80 [ 39.222786] do_syscall_64+0x3f/0x90 [ 39.223270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.223969] [ 39.224183] The buggy address belongs to the object at ffff888009526cb0 [ 39.224183] which belongs to the cache vm_area_struct of size 168 [ 39.225710] The buggy address is located 88 bytes inside of [ 39.225710] freed 168-byte region [ffff888009526cb0, ffff888009526d58) [ 39.227135] [ 39.227353] The buggy address belongs to the physical page: [ 39.228028] page:00000000a7a1a6f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9526 [ 39.229150] memcg:ffff88800e480801 [ 39.229591] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.230238] page_type: 0xffffffff() [ 39.230710] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c2780 dead000000000002 [ 39.231647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e480801 [ 39.232560] page dumped because: kasan: bad access detected [ 39.233229] [ 39.233446] Memory state around the buggy address: [ 39.234036] ffff888009526c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.234930] ffff888009526c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.235811] >ffff888009526d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.236679] ^ [ 39.237126] ffff888009526d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.237991] ffff888009526e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.238868] ================================================================== [ 39.239921] Disabling lock debugging due to kernel taint [ 41.233824] BUG: Bad rss-counter state mm:00000000f26320fe type:MM_FILEPAGES val:33 [ 41.235013] BUG: Bad rss-counter state mm:00000000f26320fe type:MM_ANONPAGES val:22 [ 41.733383] BUG: Bad rss-counter state mm:000000001060f4af type:MM_FILEPAGES val:33 [ 41.734398] BUG: Bad rss-counter state mm:000000001060f4af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2772' (ECDSA) to the list of known hosts. 2023/06/21 09:40:48 fuzzer started 2023/06/21 09:40:48 dialing manager at localhost:36067 2023/06/21 09:40:48 checking machine... 2023/06/21 09:40:48 checking revisions... [ 42.554465] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:40:48 testing simple program... [ 42.602322] cgroup: Unknown subsys name 'net' [ 42.654201] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81809a90 RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff888008d9f9a8 RSP=ffff888008d9f8e0 R8 =0000000000000000 R9 =ffff888008d9f990 R10=0000000000038001 R11=000000000000fc0c R12=ffff888008d9f9b0 R13=ffff888008d9f998 R14=ffff888008d9f991 R15=ffff888008d9f950 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 0000000000000000 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=00007f8867530650 CR3=000000000fdd0000 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=30343a3930203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732038343a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110028acf63 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000a RDI=ffff888014567b18 RBP=dffffc0000000000 RSP=ffff888014567a80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=000000000000000a R13=0000000000000000 R14=ffff888014567b10 R15=ffff88801a04c410 RIP=ffffffff813ad61a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f03f913d900 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=00007f03f85819c0 CR3=0000000009ba4000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1fec45ccec49166600000000000ae988 XMM05=a3928343a9e5a4520000000000132de0 XMM06=751b9502027dc0b90000000000131908 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000