syzkaller login: [ 31.281579] BUG: Bad rss-counter state mm:000000004f96965b type:MM_FILEPAGES val:33 [ 31.282807] BUG: Bad rss-counter state mm:000000004f96965b type:MM_ANONPAGES val:22 [ 31.340232] ================================================================== [ 31.341148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.342092] Read of size 8 at addr ffff888016c8fed8 by task sshd/219 [ 31.343032] [ 31.343258] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.344126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.345126] Call Trace: [ 31.345451] [ 31.345744] dump_stack_lvl+0x91/0xf0 [ 31.346248] print_report+0xcc/0x620 [ 31.346754] ? __virt_addr_valid+0x102/0x340 [ 31.347325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347946] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348574] kasan_report+0xbe/0xf0 [ 31.349056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349689] vma_interval_tree_remove+0xc75/0xec0 [ 31.350301] vma_prepare+0xc54/0x11a0 [ 31.350784] __split_vma+0x5af/0x950 [ 31.351280] ? __pfx___split_vma+0x10/0x10 [ 31.351817] ? find_held_lock+0x2c/0x110 [ 31.352338] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352901] ? lock_is_held_type+0x9f/0x120 [ 31.353440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.354052] ? mtree_range_walk+0x632/0x900 [ 31.354600] ? mas_walk+0x5c7/0x7c0 [ 31.355087] do_vmi_munmap+0x1f1/0x2b0 [ 31.355574] mmap_region+0x1f9/0x2660 [ 31.356054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.357282] ? __pfx_lock_acquire+0x10/0x10 [ 31.357813] ? __pfx_mmap_region+0x10/0x10 [ 31.358344] ? security_mmap_addr+0x7d/0xa0 [ 31.358899] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359445] do_mmap+0x854/0xf00 [ 31.359889] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360951] ksys_mmap_pgoff+0x3af/0x500 [ 31.361456] do_syscall_64+0x3f/0x90 [ 31.361934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362594] RIP: 0033:0x7f5a34758d82 [ 31.363069] 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 [ 31.365219] RSP: 002b:00007ffc394fe9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.366124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a34758d82 [ 31.366982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a33b92000 [ 31.367827] RBP: 00007f5a33b92000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368691] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600dac70ec0 [ 31.369539] R13: 00007ffc394fe9c0 R14: 00007ffc394fe9f0 R15: 00007ffc394fed50 [ 31.370398] [ 31.370689] [ 31.370923] Allocated by task 212: [ 31.371352] kasan_save_stack+0x22/0x50 [ 31.371860] kasan_set_track+0x25/0x30 [ 31.372350] __kasan_slab_alloc+0x59/0x70 [ 31.372870] kmem_cache_alloc+0x16b/0x370 [ 31.373395] vm_area_dup+0x20/0x160 [ 31.373845] __split_vma+0x170/0x950 [ 31.374306] split_vma+0xc6/0x110 [ 31.374742] mprotect_fixup+0x8d2/0xb30 [ 31.375259] do_mprotect_pkey+0x87e/0xd40 [ 31.375774] __x64_sys_mprotect+0x78/0xc0 [ 31.376295] do_syscall_64+0x3f/0x90 [ 31.376771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377417] [ 31.377637] Freed by task 202: [ 31.378028] kasan_save_stack+0x22/0x50 [ 31.378539] kasan_set_track+0x25/0x30 [ 31.379050] kasan_save_free_info+0x2b/0x50 [ 31.379581] __kasan_slab_free+0x10a/0x190 [ 31.380113] kmem_cache_free+0x10d/0x4d0 [ 31.380624] rcu_core+0x8c8/0x2860 [ 31.381073] __do_softirq+0x1b7/0x7d4 [ 31.381555] [ 31.381768] Last potentially related work creation: [ 31.382345] kasan_save_stack+0x22/0x50 [ 31.382852] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384087] remove_vma+0x139/0x170 [ 31.384547] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385112] do_vmi_munmap+0x1f1/0x2b0 [ 31.385614] __vm_munmap+0x138/0x3a0 [ 31.386091] __x64_sys_munmap+0x59/0x80 [ 31.386585] do_syscall_64+0x3f/0x90 [ 31.387075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387717] [ 31.387931] The buggy address belongs to the object at ffff888016c8fe80 [ 31.387931] which belongs to the cache vm_area_struct of size 168 [ 31.389403] The buggy address is located 88 bytes inside of [ 31.389403] freed 168-byte region [ffff888016c8fe80, ffff888016c8ff28) [ 31.390795] [ 31.391023] The buggy address belongs to the physical page: [ 31.391678] page:000000008ce0c9bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c8f [ 31.392763] memcg:ffff88800de2d001 [ 31.393186] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.393834] page_type: 0xffffffff() [ 31.394303] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.395237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de2d001 [ 31.396155] page dumped because: kasan: bad access detected [ 31.396823] [ 31.397048] Memory state around the buggy address: [ 31.397645] ffff888016c8fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398517] ffff888016c8fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.399395] >ffff888016c8fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.400253] ^ [ 31.401004] ffff888016c8ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.401884] ffff888016c8ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.402752] ================================================================== [ 31.403786] Disabling lock debugging due to kernel taint [ 33.317348] BUG: Bad rss-counter state mm:00000000d9d1f162 type:MM_FILEPAGES val:33 [ 33.319047] BUG: Bad rss-counter state mm:00000000d9d1f162 type:MM_ANONPAGES val:22 [ 33.772185] BUG: Bad rss-counter state mm:00000000de8da306 type:MM_FILEPAGES val:33 [ 33.774559] BUG: Bad rss-counter state mm:00000000de8da306 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24667' (ECDSA) to the list of known hosts. 2023/06/21 00:01:12 fuzzer started 2023/06/21 00:01:13 dialing manager at localhost:36067 2023/06/21 00:01:13 checking machine... 2023/06/21 00:01:13 checking revisions... [ 34.515741] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:01:13 testing simple program... [ 34.564402] cgroup: Unknown subsys name 'net' [ 34.602703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:12 Registers: info registers vcpu 0 RAX=ffff888014707de0 RBX=ffff888014707de0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8199e2bd RDI=ffff888014653698 RBP=ffff888009d45140 RSP=ffff888014707c90 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffc R11=0000000000000000 R12=ffff888014653680 R13=ffff888009d450d0 R14=dffffc0000000000 R15=ffff888009d450d0 RIP=ffffffff8199e32c 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 00007ff8f04ed900 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=00007ff8ef905040 CR3=0000000009772000 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=2032313a31303a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880164c74c0 RCX=0000000000000001 RDX=1ffff11002c98e99 RSI=ffff8880164c7de0 RDI=ffff8880164c74c8 RBP=ffff8880164c7de0 RSP=ffff8880164c7418 R8 =0000000000000001 R9 =ffff8880164c7500 R10=0000000000038001 R11=000000000008ab47 R12=0000000000000008 R13=ffff8880164c7508 R14=ffff8880164c7de0 R15=ffff8880164c74c0 RIP=ffffffff81130445 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 00007f7c70c09700 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=00007fff49682000 CR3=00000000097bc000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032313a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000