syzkaller login: [ 41.027977] BUG: Bad rss-counter state mm:00000000b5fd0756 type:MM_FILEPAGES val:33 [ 41.028992] BUG: Bad rss-counter state mm:00000000b5fd0756 type:MM_ANONPAGES val:22 [ 41.194876] ================================================================== [ 41.195808] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.196768] Read of size 8 at addr ffff88800e5ab058 by task sshd/220 [ 41.197557] [ 41.197836] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.198790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.199797] Call Trace: [ 41.200127] [ 41.200422] dump_stack_lvl+0x91/0xf0 [ 41.200931] print_report+0xcc/0x620 [ 41.201421] ? __virt_addr_valid+0x102/0x340 [ 41.201981] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.202605] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.203244] kasan_report+0xbe/0xf0 [ 41.203727] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.204356] vma_interval_tree_remove+0xc75/0xec0 [ 41.204960] vma_prepare+0xc54/0x11a0 [ 41.205449] __split_vma+0x5af/0x950 [ 41.205932] ? __pfx___split_vma+0x10/0x10 [ 41.206485] ? find_held_lock+0x2c/0x110 [ 41.207033] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.207605] ? lock_is_held_type+0x9f/0x120 [ 41.208148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.208762] ? mtree_range_walk+0x632/0x900 [ 41.209312] ? mas_walk+0x5c7/0x7c0 [ 41.209792] do_vmi_munmap+0x1f1/0x2b0 [ 41.210291] mmap_region+0x1f9/0x2660 [ 41.210804] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.211322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.212035] ? __pfx_lock_acquire+0x10/0x10 [ 41.212575] ? __pfx_mmap_region+0x10/0x10 [ 41.213107] ? security_mmap_addr+0x7d/0xa0 [ 41.213644] ? get_unmapped_area+0x1f5/0x3f0 [ 41.214210] do_mmap+0x854/0xf00 [ 41.214669] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.215172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.215736] ksys_mmap_pgoff+0x3af/0x500 [ 41.216243] do_syscall_64+0x3f/0x90 [ 41.216727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.217376] RIP: 0033:0x7f31bded6d82 [ 41.217842] 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 [ 41.219991] RSP: 002b:00007ffc2599fe88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.220897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31bded6d82 [ 41.221746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31bd310000 [ 41.222593] RBP: 00007f31bd310000 R08: 0000000000000009 R09: 0000000000001000 [ 41.223450] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572e8dd6f70 [ 41.224294] R13: 00007ffc2599fea0 R14: 00007ffc2599fed0 R15: 00007ffc259a0230 [ 41.225144] [ 41.225436] [ 41.225655] Allocated by task 213: [ 41.226083] kasan_save_stack+0x22/0x50 [ 41.226592] kasan_set_track+0x25/0x30 [ 41.227096] __kasan_slab_alloc+0x59/0x70 [ 41.227628] kmem_cache_alloc+0x16b/0x370 [ 41.228145] vm_area_dup+0x20/0x160 [ 41.228609] __split_vma+0x170/0x950 [ 41.229075] split_vma+0xc6/0x110 [ 41.229522] mprotect_fixup+0x8d2/0xb30 [ 41.230025] do_mprotect_pkey+0x87e/0xd40 [ 41.230548] __x64_sys_mprotect+0x78/0xc0 [ 41.231095] do_syscall_64+0x3f/0x90 [ 41.231574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.232223] [ 41.232444] Freed by task 19: [ 41.232824] kasan_save_stack+0x22/0x50 [ 41.233338] kasan_set_track+0x25/0x30 [ 41.233831] kasan_save_free_info+0x2b/0x50 [ 41.234371] __kasan_slab_free+0x10a/0x190 [ 41.234909] kmem_cache_free+0x10d/0x4d0 [ 41.235426] rcu_core+0x8c8/0x2860 [ 41.235878] __do_softirq+0x1b7/0x7d4 [ 41.236359] [ 41.236577] Last potentially related work creation: [ 41.237162] kasan_save_stack+0x22/0x50 [ 41.237668] __kasan_record_aux_stack+0x8e/0xa0 [ 41.238245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.238903] remove_vma+0x139/0x170 [ 41.239357] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.239914] do_vmi_munmap+0x1f1/0x2b0 [ 41.240401] __vm_munmap+0x138/0x3a0 [ 41.240865] __x64_sys_munmap+0x59/0x80 [ 41.241360] do_syscall_64+0x3f/0x90 [ 41.241830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.242491] [ 41.242714] Second to last potentially related work creation: [ 41.243408] kasan_save_stack+0x22/0x50 [ 41.243923] __kasan_record_aux_stack+0x8e/0xa0 [ 41.244508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.245156] remove_vma+0x139/0x170 [ 41.245619] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.246182] do_vmi_munmap+0x1f1/0x2b0 [ 41.246672] mmap_region+0x1f9/0x2660 [ 41.247187] do_mmap+0x854/0xf00 [ 41.247625] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.248111] ksys_mmap_pgoff+0x3af/0x500 [ 41.248625] do_syscall_64+0x3f/0x90 [ 41.249103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.249753] [ 41.249971] The buggy address belongs to the object at ffff88800e5ab000 [ 41.249971] which belongs to the cache vm_area_struct of size 168 [ 41.251459] The buggy address is located 88 bytes inside of [ 41.251459] freed 168-byte region [ffff88800e5ab000, ffff88800e5ab0a8) [ 41.252859] [ 41.253073] The buggy address belongs to the physical page: [ 41.253734] page:00000000f288521d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ab [ 41.254817] memcg:ffff88800e2d1e01 [ 41.255249] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.255955] page_type: 0xffffffff() [ 41.256420] raw: 0100000000000200 ffff88800879fc80 ffffea0000396c00 dead000000000007 [ 41.257339] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2d1e01 [ 41.258246] page dumped because: kasan: bad access detected [ 41.258954] [ 41.259174] Memory state around the buggy address: [ 41.259772] ffff88800e5aaf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 41.260646] ffff88800e5aaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.261534] >ffff88800e5ab000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.262410] ^ [ 41.263158] ffff88800e5ab080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 41.264038] ffff88800e5ab100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.264909] ================================================================== [ 41.266108] Disabling lock debugging due to kernel taint [ 43.402986] BUG: Bad rss-counter state mm:000000003aa39a7e type:MM_FILEPAGES val:33 [ 43.404034] BUG: Bad rss-counter state mm:000000003aa39a7e type:MM_ANONPAGES val:22 [ 43.866612] BUG: Bad rss-counter state mm:0000000039356749 type:MM_FILEPAGES val:33 [ 43.868338] BUG: Bad rss-counter state mm:0000000039356749 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25244' (ECDSA) to the list of known hosts. 2023/06/19 11:41:05 fuzzer started 2023/06/19 11:41:05 dialing manager at localhost:44161 2023/06/19 11:41:05 checking machine... 2023/06/19 11:41:05 checking revisions... [ 44.607959] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:41:05 testing simple program... [ 44.659617] cgroup: Unknown subsys name 'net' [ 44.701333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11001b4169b RSI=ffffffff818ea7a8 RDI=ffff88800da0b4d8 RBP=0000000000000008 RSP=ffff88800ca77c98 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff88800da0b4e0 R13=0000000000004000 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff818ea7d7 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 00007f656cf5a900 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=00007ffca70ab000 CR3=0000000016eea000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002d9f22b RSI=0000000000000010 RDI=0000000000000007 RBP=0000000000000010 RSP=ffff888008d5fa20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff888016cf9100 R13=ffffffffffffffff R14=0000607f92e12928 R15=ffff888018e618b0 RIP=ffffffff82244372 RFL=00000046 [---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 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=0000557277860000 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f925f3d1c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000