syzkaller login: [ 38.719754] BUG: Bad rss-counter state mm:0000000083713f9b type:MM_FILEPAGES val:33 [ 38.721883] BUG: Bad rss-counter state mm:0000000083713f9b type:MM_ANONPAGES val:22 [ 38.887068] ================================================================== [ 38.888085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.889030] Read of size 8 at addr ffff88800d592c20 by task sshd/219 [ 38.889901] [ 38.890121] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.891000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.891993] Call Trace: [ 38.892315] [ 38.892601] dump_stack_lvl+0x91/0xf0 [ 38.893098] print_report+0xcc/0x620 [ 38.893582] ? __virt_addr_valid+0x102/0x340 [ 38.894139] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894760] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895399] kasan_report+0xbe/0xf0 [ 38.895879] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896507] vma_interval_tree_remove+0xc75/0xec0 [ 38.897113] vma_prepare+0xc54/0x11a0 [ 38.897600] __split_vma+0x5af/0x950 [ 38.898078] ? __pfx___split_vma+0x10/0x10 [ 38.898610] ? find_held_lock+0x2c/0x110 [ 38.899153] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.899727] ? lock_is_held_type+0x9f/0x120 [ 38.900279] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.900887] ? mtree_range_walk+0x632/0x900 [ 38.901442] ? mas_walk+0x5c7/0x7c0 [ 38.901924] do_vmi_munmap+0x1f1/0x2b0 [ 38.902416] mmap_region+0x1f9/0x2660 [ 38.902894] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.903418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.904140] ? __pfx_lock_acquire+0x10/0x10 [ 38.904675] ? __pfx_mmap_region+0x10/0x10 [ 38.905218] ? security_mmap_addr+0x7d/0xa0 [ 38.905757] ? get_unmapped_area+0x1f5/0x3f0 [ 38.906301] do_mmap+0x854/0xf00 [ 38.906741] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.907259] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.907828] ksys_mmap_pgoff+0x3af/0x500 [ 38.908340] do_syscall_64+0x3f/0x90 [ 38.908824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909470] RIP: 0033:0x7ff6817d6d82 [ 38.909928] 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 [ 38.912092] RSP: 002b:00007ffec6715868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.913010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6817d6d82 [ 38.913856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff680c10000 [ 38.914703] RBP: 00007ff680c10000 R08: 0000000000000009 R09: 0000000000001000 [ 38.915581] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b3cf21ec0 [ 38.916442] R13: 00007ffec6715880 R14: 00007ffec67158b0 R15: 00007ffec6715c10 [ 38.917315] [ 38.917619] [ 38.917834] Allocated by task 212: [ 38.918272] kasan_save_stack+0x22/0x50 [ 38.918783] kasan_set_track+0x25/0x30 [ 38.919300] __kasan_slab_alloc+0x59/0x70 [ 38.919826] kmem_cache_alloc+0x16b/0x370 [ 38.920351] vm_area_dup+0x20/0x160 [ 38.920812] __split_vma+0x170/0x950 [ 38.921284] split_vma+0xc6/0x110 [ 38.921726] mprotect_fixup+0x8d2/0xb30 [ 38.922227] do_mprotect_pkey+0x87e/0xd40 [ 38.922752] __x64_sys_mprotect+0x78/0xc0 [ 38.923291] do_syscall_64+0x3f/0x90 [ 38.923779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924430] [ 38.924644] Freed by task 212: [ 38.925039] kasan_save_stack+0x22/0x50 [ 38.925551] kasan_set_track+0x25/0x30 [ 38.926057] kasan_save_free_info+0x2b/0x50 [ 38.926606] __kasan_slab_free+0x10a/0x190 [ 38.927168] kmem_cache_free+0x10d/0x4d0 [ 38.927689] rcu_core+0x8c8/0x2860 [ 38.928136] __do_softirq+0x1b7/0x7d4 [ 38.928623] [ 38.928842] Last potentially related work creation: [ 38.929435] kasan_save_stack+0x22/0x50 [ 38.929941] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931183] remove_vma+0x139/0x170 [ 38.931638] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932209] do_vmi_munmap+0x1f1/0x2b0 [ 38.932693] __vm_munmap+0x138/0x3a0 [ 38.933165] __x64_sys_munmap+0x59/0x80 [ 38.933661] do_syscall_64+0x3f/0x90 [ 38.934139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934786] [ 38.935012] The buggy address belongs to the object at ffff88800d592bc8 [ 38.935012] which belongs to the cache vm_area_struct of size 168 [ 38.936484] The buggy address is located 88 bytes inside of [ 38.936484] freed 168-byte region [ffff88800d592bc8, ffff88800d592c70) [ 38.937908] [ 38.938123] The buggy address belongs to the physical page: [ 38.938805] page:00000000c7a37219 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd592 [ 38.939917] memcg:ffff88800d83ad01 [ 38.940354] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941004] page_type: 0xffffffff() [ 38.941468] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.942398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d83ad01 [ 38.943338] page dumped because: kasan: bad access detected [ 38.943999] [ 38.944217] Memory state around the buggy address: [ 38.944805] ffff88800d592b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945659] ffff88800d592b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.946521] >ffff88800d592c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.947409] ^ [ 38.947947] ffff88800d592c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.948819] ffff88800d592d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.949684] ================================================================== [ 38.950686] Disabling lock debugging due to kernel taint [ 40.899369] BUG: Bad rss-counter state mm:00000000a9902e78 type:MM_FILEPAGES val:33 [ 40.900537] BUG: Bad rss-counter state mm:00000000a9902e78 type:MM_ANONPAGES val:22 [ 41.383355] BUG: Bad rss-counter state mm:00000000ae1531e7 type:MM_FILEPAGES val:33 [ 41.384537] BUG: Bad rss-counter state mm:00000000ae1531e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3457' (ECDSA) to the list of known hosts. 2023/06/21 07:19:46 fuzzer started 2023/06/21 07:19:46 dialing manager at localhost:36067 2023/06/21 07:19:46 checking machine... 2023/06/21 07:19:46 checking revisions... [ 42.042932] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:19:47 testing simple program... [ 42.098318] cgroup: Unknown subsys name 'net' [ 42.149272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fc9a3856163 RCX=0000000000000000 RDX=ffff888016ea1b40 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=00007fc9a3856163 RSP=ffff888016587378 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888016587480 R13=0000000000000000 R14=ffff888016ea1b40 R15=ffff88801a044600 RIP=ffffffff811fc7d5 RFL=00000293 [--S-A-C] 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 00007fc9a3363900 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=00007fc9a391a618 CR3=000000000fe44000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb356acc940 CR3=000000000dd32000 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=2036343a39313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a39313a3730203132 XMM08=7379733a755f6d65747379733d6a6275 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000