syzkaller login: [ 30.883261] BUG: Bad rss-counter state mm:000000002ffd6ef7 type:MM_FILEPAGES val:33 [ 30.884630] BUG: Bad rss-counter state mm:000000002ffd6ef7 type:MM_ANONPAGES val:22 [ 30.914799] ================================================================== [ 30.915687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.916464] Read of size 8 at addr ffff888019d1dd08 by task sshd/228 [ 30.917085] [ 30.917261] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.917974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.918789] Call Trace: [ 30.919050] [ 30.919280] dump_stack_lvl+0x91/0xf0 [ 30.919696] print_report+0xcc/0x620 [ 30.920100] ? __virt_addr_valid+0x102/0x340 [ 30.920571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.921072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.921585] kasan_report+0xbe/0xf0 [ 30.921971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.922481] vma_interval_tree_remove+0xc75/0xec0 [ 30.922995] vma_prepare+0xc54/0x11a0 [ 30.923386] __split_vma+0x5af/0x950 [ 30.923779] ? __pfx___split_vma+0x10/0x10 [ 30.924215] ? find_held_lock+0x2c/0x110 [ 30.924658] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.925132] ? lock_is_held_type+0x9f/0x120 [ 30.925585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.926087] ? mtree_range_walk+0x632/0x900 [ 30.926572] ? mas_walk+0x5c7/0x7c0 [ 30.927112] do_vmi_munmap+0x1f1/0x2b0 [ 30.927375] mmap_region+0x1f9/0x2660 [ 30.927639] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.927914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.928296] ? __pfx_lock_acquire+0x10/0x10 [ 30.928581] ? __pfx_mmap_region+0x10/0x10 [ 30.928875] ? security_mmap_addr+0x7d/0xa0 [ 30.929180] ? get_unmapped_area+0x1f5/0x3f0 [ 30.929475] do_mmap+0x854/0xf00 [ 30.929715] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.929982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.930281] ksys_mmap_pgoff+0x3af/0x500 [ 30.930568] do_syscall_64+0x3f/0x90 [ 30.930836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931194] RIP: 0033:0x7fd72ebd9d82 [ 30.931441] 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 [ 30.932582] RSP: 002b:00007ffc2fe949b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.933078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd72ebd9d82 [ 30.933529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd72e013000 [ 30.933986] RBP: 00007fd72e013000 R08: 0000000000000009 R09: 0000000000001000 [ 30.934436] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639bf864d90 [ 30.934907] R13: 00007ffc2fe949d0 R14: 00007ffc2fe94a00 R15: 00007ffc2fe94d60 [ 30.935370] [ 30.935527] [ 30.935642] Allocated by task 221: [ 30.935878] kasan_save_stack+0x22/0x50 [ 30.936154] kasan_set_track+0x25/0x30 [ 30.936419] __kasan_slab_alloc+0x59/0x70 [ 30.936700] kmem_cache_alloc+0x16b/0x370 [ 30.936983] vm_area_dup+0x20/0x160 [ 30.937227] __split_vma+0x170/0x950 [ 30.937478] split_vma+0xc6/0x110 [ 30.937717] mprotect_fixup+0x8d2/0xb30 [ 30.937991] do_mprotect_pkey+0x87e/0xd40 [ 30.938268] __x64_sys_mprotect+0x78/0xc0 [ 30.938553] do_syscall_64+0x3f/0x90 [ 30.938811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.939153] [ 30.939269] Freed by task 13: [ 30.939477] kasan_save_stack+0x22/0x50 [ 30.939752] kasan_set_track+0x25/0x30 [ 30.940015] kasan_save_free_info+0x2b/0x50 [ 30.940302] __kasan_slab_free+0x10a/0x190 [ 30.940588] kmem_cache_free+0x10d/0x4d0 [ 30.940871] rcu_core+0x8c8/0x2860 [ 30.941112] __do_softirq+0x1b7/0x7d4 [ 30.941373] [ 30.941490] Last potentially related work creation: [ 30.941809] kasan_save_stack+0x22/0x50 [ 30.942080] __kasan_record_aux_stack+0x8e/0xa0 [ 30.942387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.942741] remove_vma+0x139/0x170 [ 30.942988] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.943288] do_vmi_munmap+0x1f1/0x2b0 [ 30.943550] __vm_munmap+0x138/0x3a0 [ 30.943805] __x64_sys_munmap+0x59/0x80 [ 30.944072] do_syscall_64+0x3f/0x90 [ 30.944327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.944671] [ 30.944790] The buggy address belongs to the object at ffff888019d1dcb0 [ 30.944790] which belongs to the cache vm_area_struct of size 168 [ 30.945583] The buggy address is located 88 bytes inside of [ 30.945583] freed 168-byte region [ffff888019d1dcb0, ffff888019d1dd58) [ 30.946334] [ 30.946452] The buggy address belongs to the physical page: [ 30.946822] page:0000000083454207 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d1d [ 30.947415] memcg:ffff888019d08801 [ 30.947642] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.947993] page_type: 0xffffffff() [ 30.948237] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.948732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d08801 [ 30.949227] page dumped because: kasan: bad access detected [ 30.949585] [ 30.949703] Memory state around the buggy address: [ 30.950020] ffff888019d1dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.950485] ffff888019d1dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.950957] >ffff888019d1dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.951421] ^ [ 30.951660] ffff888019d1dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.952125] ffff888019d1de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.952583] ================================================================== [ 30.953220] Disabling lock debugging due to kernel taint [ 33.369726] BUG: Bad rss-counter state mm:00000000c25b5ee6 type:MM_FILEPAGES val:33 [ 33.370324] BUG: Bad rss-counter state mm:00000000c25b5ee6 type:MM_ANONPAGES val:22 [ 33.818571] BUG: Bad rss-counter state mm:00000000b79eac2c type:MM_FILEPAGES val:33 [ 33.819387] BUG: Bad rss-counter state mm:00000000b79eac2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33126' (ECDSA) to the list of known hosts. 2023/06/21 08:24:33 fuzzer started 2023/06/21 08:24:34 dialing manager at localhost:36067 2023/06/21 08:24:34 checking machine... 2023/06/21 08:24:34 checking revisions... [ 34.532586] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:24:34 testing simple program... [ 34.588719] cgroup: Unknown subsys name 'net' [ 34.628787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:24:33 Registers: info registers vcpu 0 RAX=ffff8880167d8001 RBX=ffff8880167d7938 RCX=0000000000000001 RDX=ffff8880167d7e01 RSI=ffff8880167d7e58 RDI=ffff8880167d7948 RBP=ffff8880167d7e58 RSP=ffff8880167d7890 R8 =0000000000000001 R9 =ffff8880167d7978 R10=0000000000038001 R11=000000000008a6b1 R12=0000000000000008 R13=ffff8880167d0000 R14=ffff8880167d7e58 R15=ffff8880167d7938 RIP=ffffffff811304c9 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 00007f77be0d0900 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=00007f77be687618 CR3=000000001cd50000 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=00007f992c22e640 CR3=00000000142c8000 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=2033333a34323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a34323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000