syzkaller login: [ 31.134301] BUG: Bad rss-counter state mm:000000000cc613fa type:MM_FILEPAGES val:33 [ 31.135493] BUG: Bad rss-counter state mm:000000000cc613fa type:MM_ANONPAGES val:22 [ 31.175113] ================================================================== [ 31.176039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177163] Read of size 8 at addr ffff888015e634e0 by task sshd/219 [ 31.178149] [ 31.178424] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.179371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.180480] Call Trace: [ 31.180851] [ 31.181211] dump_stack_lvl+0x91/0xf0 [ 31.181712] print_report+0xcc/0x620 [ 31.182257] ? __virt_addr_valid+0x102/0x340 [ 31.182909] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183549] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184187] kasan_report+0xbe/0xf0 [ 31.184661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185299] vma_interval_tree_remove+0xc75/0xec0 [ 31.185906] vma_prepare+0xc54/0x11a0 [ 31.186399] __split_vma+0x5af/0x950 [ 31.186884] ? __pfx___split_vma+0x10/0x10 [ 31.187411] ? find_held_lock+0x2c/0x110 [ 31.187936] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188504] ? lock_is_held_type+0x9f/0x120 [ 31.189049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189684] ? mtree_range_walk+0x632/0x900 [ 31.190254] ? mas_walk+0x5c7/0x7c0 [ 31.190733] do_vmi_munmap+0x1f1/0x2b0 [ 31.191229] mmap_region+0x1f9/0x2660 [ 31.191717] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.192962] ? __pfx_lock_acquire+0x10/0x10 [ 31.193511] ? __pfx_mmap_region+0x10/0x10 [ 31.194044] ? security_mmap_addr+0x7d/0xa0 [ 31.194573] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195133] do_mmap+0x854/0xf00 [ 31.195581] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.196641] ksys_mmap_pgoff+0x3af/0x500 [ 31.197149] do_syscall_64+0x3f/0x90 [ 31.197640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198298] RIP: 0033:0x7f274d934d82 [ 31.198767] 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 [ 31.200910] RSP: 002b:00007ffe04327a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.201843] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f274d934d82 [ 31.202695] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f274cd6e000 [ 31.203542] RBP: 00007f274cd6e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.204395] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e31dc2bf60 [ 31.205252] R13: 00007ffe04327a40 R14: 00007ffe04327a70 R15: 00007ffe04327dd0 [ 31.206112] [ 31.206406] [ 31.206624] Allocated by task 212: [ 31.207049] kasan_save_stack+0x22/0x50 [ 31.207554] kasan_set_track+0x25/0x30 [ 31.208050] __kasan_slab_alloc+0x59/0x70 [ 31.208579] kmem_cache_alloc+0x16b/0x370 [ 31.209094] vm_area_dup+0x20/0x160 [ 31.209567] __split_vma+0x170/0x950 [ 31.210034] split_vma+0xc6/0x110 [ 31.210473] mprotect_fixup+0x8d2/0xb30 [ 31.210973] do_mprotect_pkey+0x87e/0xd40 [ 31.211491] __x64_sys_mprotect+0x78/0xc0 [ 31.212012] do_syscall_64+0x3f/0x90 [ 31.212486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213129] [ 31.213354] Freed by task 212: [ 31.213745] kasan_save_stack+0x22/0x50 [ 31.214255] kasan_set_track+0x25/0x30 [ 31.214750] kasan_save_free_info+0x2b/0x50 [ 31.215294] __kasan_slab_free+0x10a/0x190 [ 31.215825] kmem_cache_free+0x10d/0x4d0 [ 31.216336] rcu_core+0x8c8/0x2860 [ 31.216808] __do_softirq+0x1b7/0x7d4 [ 31.217307] [ 31.217523] Last potentially related work creation: [ 31.218105] kasan_save_stack+0x22/0x50 [ 31.218603] __kasan_record_aux_stack+0x8e/0xa0 [ 31.219174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.219825] remove_vma+0x139/0x170 [ 31.220276] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.220836] do_vmi_munmap+0x1f1/0x2b0 [ 31.221330] __vm_munmap+0x138/0x3a0 [ 31.221801] __x64_sys_munmap+0x59/0x80 [ 31.222295] do_syscall_64+0x3f/0x90 [ 31.222769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223411] [ 31.223625] The buggy address belongs to the object at ffff888015e63488 [ 31.223625] which belongs to the cache vm_area_struct of size 168 [ 31.225088] The buggy address is located 88 bytes inside of [ 31.225088] freed 168-byte region [ffff888015e63488, ffff888015e63530) [ 31.226500] [ 31.226718] The buggy address belongs to the physical page: [ 31.227377] page:00000000cc7b04b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e63 [ 31.228467] memcg:ffff88800c636601 [ 31.228896] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.229562] page_type: 0xffffffff() [ 31.230014] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.230936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c636601 [ 31.231840] page dumped because: kasan: bad access detected [ 31.232509] [ 31.232731] Memory state around the buggy address: [ 31.233315] ffff888015e63380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.234174] ffff888015e63400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.235028] >ffff888015e63480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.235877] ^ [ 31.236626] ffff888015e63500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.237504] ffff888015e63580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.238353] ================================================================== [ 31.239377] Disabling lock debugging due to kernel taint [ 33.825308] BUG: Bad rss-counter state mm:00000000c6f986ad type:MM_FILEPAGES val:33 [ 33.826301] BUG: Bad rss-counter state mm:00000000c6f986ad type:MM_ANONPAGES val:22 [ 34.231290] BUG: Bad rss-counter state mm:00000000db2ce848 type:MM_FILEPAGES val:33 [ 34.232305] BUG: Bad rss-counter state mm:00000000db2ce848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45480' (ECDSA) to the list of known hosts. 2023/06/21 04:30:17 fuzzer started 2023/06/21 04:30:17 dialing manager at localhost:36067 2023/06/21 04:30:17 checking machine... 2023/06/21 04:30:17 checking revisions... [ 34.964234] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:30:17 testing simple program... [ 35.023539] cgroup: Unknown subsys name 'net' [ 35.060802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:30:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09de8 RCX=ffffffff86138e8c RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81131cac 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 00007fb4070fb700 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=00007f2bef817650 CR3=0000000018ce0000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313134352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363131 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=ffffffff86147ba3 RBX=0000000000000001 RCX=ffffffff86147b9e RDX=0000000000000000 RSI=0000000000000003 RDI=ffffffff85e07e28 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86147b9e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000023519 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130a6e 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 00007f776ecb4900 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=00007f776e137520 CR3=000000000ccca000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d000d9610015bd1a00000000000ae988 XMM05=8f766fa028803b2700000000001330c0 XMM06=dfcdbad4f1609c370000000000131be8 XMM07=fb795ef6d65770560000000000122038 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000