syzkaller login: [ 31.249619] BUG: Bad rss-counter state mm:00000000c6e9045e type:MM_FILEPAGES val:33 [ 31.251430] BUG: Bad rss-counter state mm:00000000c6e9045e type:MM_ANONPAGES val:22 [ 31.395775] ================================================================== [ 31.396622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.397502] Read of size 8 at addr ffff888016ec8a50 by task sshd/219 [ 31.398241] [ 31.398445] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.399255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.400263] Call Trace: [ 31.400567] [ 31.400831] dump_stack_lvl+0x91/0xf0 [ 31.401284] print_report+0xcc/0x620 [ 31.401724] ? __virt_addr_valid+0x102/0x340 [ 31.402499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403372] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404255] kasan_report+0xbe/0xf0 [ 31.404937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405813] vma_interval_tree_remove+0xc75/0xec0 [ 31.406676] vma_prepare+0xc54/0x11a0 [ 31.407328] __split_vma+0x5af/0x950 [ 31.408006] ? __pfx___split_vma+0x10/0x10 [ 31.408754] ? find_held_lock+0x2c/0x110 [ 31.409467] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.410291] ? lock_is_held_type+0x9f/0x120 [ 31.410985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.411457] ? mtree_range_walk+0x632/0x900 [ 31.411903] ? mas_walk+0x5c7/0x7c0 [ 31.412269] do_vmi_munmap+0x1f1/0x2b0 [ 31.412666] mmap_region+0x1f9/0x2660 [ 31.413039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.414016] ? __pfx_lock_acquire+0x10/0x10 [ 31.414429] ? __pfx_mmap_region+0x10/0x10 [ 31.414846] ? security_mmap_addr+0x7d/0xa0 [ 31.415259] ? get_unmapped_area+0x1f5/0x3f0 [ 31.415702] do_mmap+0x854/0xf00 [ 31.416046] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.416427] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.416871] ksys_mmap_pgoff+0x3af/0x500 [ 31.417266] do_syscall_64+0x3f/0x90 [ 31.417648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418157] RIP: 0033:0x7fed9ca1ad82 [ 31.418508] 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 [ 31.420188] RSP: 002b:00007ffc833d72e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.420897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed9ca1ad82 [ 31.421557] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed9be54000 [ 31.422252] RBP: 00007fed9be54000 R08: 0000000000000009 R09: 0000000000001000 [ 31.422916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a116e60f70 [ 31.423420] R13: 00007ffc833d7300 R14: 00007ffc833d7330 R15: 00007ffc833d7690 [ 31.423946] [ 31.424119] [ 31.424244] Allocated by task 212: [ 31.424497] kasan_save_stack+0x22/0x50 [ 31.424797] kasan_set_track+0x25/0x30 [ 31.425085] __kasan_slab_alloc+0x59/0x70 [ 31.425387] kmem_cache_alloc+0x16b/0x370 [ 31.425694] vm_area_dup+0x20/0x160 [ 31.425971] __split_vma+0x170/0x950 [ 31.426243] split_vma+0xc6/0x110 [ 31.426497] mprotect_fixup+0x8d2/0xb30 [ 31.426795] do_mprotect_pkey+0x87e/0xd40 [ 31.427104] __x64_sys_mprotect+0x78/0xc0 [ 31.427412] do_syscall_64+0x3f/0x90 [ 31.427699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428073] [ 31.428201] Freed by task 19: [ 31.428425] kasan_save_stack+0x22/0x50 [ 31.428734] kasan_set_track+0x25/0x30 [ 31.429024] kasan_save_free_info+0x2b/0x50 [ 31.429336] __kasan_slab_free+0x10a/0x190 [ 31.429660] kmem_cache_free+0x10d/0x4d0 [ 31.429974] rcu_core+0x8c8/0x2860 [ 31.430238] __do_softirq+0x1b7/0x7d4 [ 31.430512] [ 31.430640] Last potentially related work creation: [ 31.430988] kasan_save_stack+0x22/0x50 [ 31.431280] __kasan_record_aux_stack+0x8e/0xa0 [ 31.431625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.432001] remove_vma+0x139/0x170 [ 31.432263] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.432596] do_vmi_munmap+0x1f1/0x2b0 [ 31.432882] __vm_munmap+0x138/0x3a0 [ 31.433149] __x64_sys_munmap+0x59/0x80 [ 31.433436] do_syscall_64+0x3f/0x90 [ 31.433720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434101] [ 31.434225] The buggy address belongs to the object at ffff888016ec89f8 [ 31.434225] which belongs to the cache vm_area_struct of size 168 [ 31.435116] The buggy address is located 88 bytes inside of [ 31.435116] freed 168-byte region [ffff888016ec89f8, ffff888016ec8aa0) [ 31.435963] [ 31.436089] The buggy address belongs to the physical page: [ 31.436476] page:00000000e99ec18b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ec8 [ 31.437125] memcg:ffff88801653fe01 [ 31.437375] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.437790] page_type: 0xffffffff() [ 31.438066] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.438619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801653fe01 [ 31.439151] page dumped because: kasan: bad access detected [ 31.439533] [ 31.439674] Memory state around the buggy address: [ 31.440021] ffff888016ec8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.440530] ffff888016ec8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.441034] >ffff888016ec8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.441532] ^ [ 31.441968] ffff888016ec8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.442468] ffff888016ec8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.442973] ================================================================== [ 31.443886] Disabling lock debugging due to kernel taint [ 33.198851] BUG: Bad rss-counter state mm:00000000e3cb5168 type:MM_FILEPAGES val:33 [ 33.199927] BUG: Bad rss-counter state mm:00000000e3cb5168 type:MM_ANONPAGES val:22 [ 33.732379] BUG: Bad rss-counter state mm:00000000b2b53d6e type:MM_FILEPAGES val:33 [ 33.734057] BUG: Bad rss-counter state mm:00000000b2b53d6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12984' (ECDSA) to the list of known hosts. 2023/06/20 10:12:15 fuzzer started 2023/06/20 10:12:15 dialing manager at localhost:44161 2023/06/20 10:12:15 checking machine... 2023/06/20 10:12:15 checking revisions... [ 34.389442] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:12:15 testing simple program... [ 34.447093] cgroup: Unknown subsys name 'net' [ 34.488203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:12:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=0000000000000008 RSI=ffff8880181ef948 RDI=ffff8880181ef578 RBP=ffff8880181ef5d0 RSP=ffff8880181ef500 R8 =0000000000000001 R9 =ffff8880181ef5b8 R10=0000000000038001 R11=0000000000020c48 R12=ffff8880181ef5d8 R13=ffff8880181ef5c0 R14=ffff8880181ef948 R15=ffff8880181ef578 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007f9c0e0a4700 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=00007f646ed7101c CR3=00000000181e2000 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=2035313a32313a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=ffffffff85d3d010 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110028c0e1c RSP=ffff8880146070d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=0000000000092cc0 RIP=ffffffff812d86bc RFL=00000202 [-------] 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 00007ffb999e8900 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=00007ffb98e61b20 CR3=000000000ec24000 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=34deea07977860c800000000000ae988 XMM05=576477a289fbd99d0000000000135308 XMM06=dfcdbad4f1609c3700000000001341a0 XMM07=fb795ef6d657705600000000001245e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000