syzkaller login: [ 31.132517] BUG: Bad rss-counter state mm:00000000b6df0275 type:MM_FILEPAGES val:33 [ 31.133514] BUG: Bad rss-counter state mm:00000000b6df0275 type:MM_ANONPAGES val:22 [ 31.301748] ================================================================== [ 31.303115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.304694] Read of size 8 at addr ffff8880183bc3f8 by task sshd/220 [ 31.305689] [ 31.305960] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.307064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.308316] Call Trace: [ 31.308735] [ 31.309082] dump_stack_lvl+0x91/0xf0 [ 31.309686] print_report+0xcc/0x620 [ 31.310290] ? __virt_addr_valid+0x102/0x340 [ 31.311008] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.311781] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.312548] kasan_report+0xbe/0xf0 [ 31.313177] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.313959] vma_interval_tree_remove+0xc75/0xec0 [ 31.314724] vma_prepare+0xc54/0x11a0 [ 31.315323] __split_vma+0x5af/0x950 [ 31.315917] ? __pfx___split_vma+0x10/0x10 [ 31.316568] ? find_held_lock+0x2c/0x110 [ 31.317246] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.317969] ? lock_is_held_type+0x9f/0x120 [ 31.318639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.319392] ? mtree_range_walk+0x632/0x900 [ 31.320083] ? mas_walk+0x5c7/0x7c0 [ 31.320683] do_vmi_munmap+0x1f1/0x2b0 [ 31.321307] mmap_region+0x1f9/0x2660 [ 31.321911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.322560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.323472] ? __pfx_lock_acquire+0x10/0x10 [ 31.324145] ? __pfx_mmap_region+0x10/0x10 [ 31.324822] ? security_mmap_addr+0x7d/0xa0 [ 31.325490] ? get_unmapped_area+0x1f5/0x3f0 [ 31.326185] do_mmap+0x854/0xf00 [ 31.326732] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.327343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.328040] ksys_mmap_pgoff+0x3af/0x500 [ 31.328697] do_syscall_64+0x3f/0x90 [ 31.329299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330107] RIP: 0033:0x7ff276288d82 [ 31.330664] 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 [ 31.333379] RSP: 002b:00007fff814417a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.334551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff276288d82 [ 31.335637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2756c2000 [ 31.336719] RBP: 00007ff2756c2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.337793] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611e330af70 [ 31.338874] R13: 00007fff814417c0 R14: 00007fff814417f0 R15: 00007fff81441b50 [ 31.339959] [ 31.340324] [ 31.340588] Allocated by task 213: [ 31.341137] kasan_save_stack+0x22/0x50 [ 31.341773] kasan_set_track+0x25/0x30 [ 31.342400] __kasan_slab_alloc+0x59/0x70 [ 31.343062] kmem_cache_alloc+0x16b/0x370 [ 31.343712] vm_area_dup+0x20/0x160 [ 31.344275] __split_vma+0x170/0x950 [ 31.344856] split_vma+0xc6/0x110 [ 31.345454] mprotect_fixup+0x8d2/0xb30 [ 31.346094] do_mprotect_pkey+0x87e/0xd40 [ 31.346751] __x64_sys_mprotect+0x78/0xc0 [ 31.347402] do_syscall_64+0x3f/0x90 [ 31.348000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.348792] [ 31.349003] Freed by task 213: [ 31.349378] kasan_save_stack+0x22/0x50 [ 31.349858] kasan_set_track+0x25/0x30 [ 31.350332] kasan_save_free_info+0x2b/0x50 [ 31.350830] __kasan_slab_free+0x10a/0x190 [ 31.351340] kmem_cache_free+0x10d/0x4d0 [ 31.351821] rcu_core+0x8c8/0x2860 [ 31.352240] __do_softirq+0x1b7/0x7d4 [ 31.352705] [ 31.352911] Last potentially related work creation: [ 31.353468] kasan_save_stack+0x22/0x50 [ 31.353948] __kasan_record_aux_stack+0x8e/0xa0 [ 31.354609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.355365] remove_vma+0x139/0x170 [ 31.355892] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.356543] do_vmi_munmap+0x1f1/0x2b0 [ 31.357135] __vm_munmap+0x138/0x3a0 [ 31.357681] __x64_sys_munmap+0x59/0x80 [ 31.358262] do_syscall_64+0x3f/0x90 [ 31.358818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359571] [ 31.359823] The buggy address belongs to the object at ffff8880183bc3a0 [ 31.359823] which belongs to the cache vm_area_struct of size 168 [ 31.361561] The buggy address is located 88 bytes inside of [ 31.361561] freed 168-byte region [ffff8880183bc3a0, ffff8880183bc448) [ 31.363223] [ 31.363474] The buggy address belongs to the physical page: [ 31.364250] page:000000009a02ea26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183bc [ 31.365558] memcg:ffff88800f531d01 [ 31.366059] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.366814] page_type: 0xffffffff() [ 31.367343] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.368445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f531d01 [ 31.369586] page dumped because: kasan: bad access detected [ 31.370426] [ 31.370678] Memory state around the buggy address: [ 31.371361] ffff8880183bc280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.372369] ffff8880183bc300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.373395] >ffff8880183bc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.374393] ^ [ 31.375380] ffff8880183bc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.376373] ffff8880183bc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.377388] ================================================================== [ 31.378461] Disabling lock debugging due to kernel taint [ 33.418521] BUG: Bad rss-counter state mm:0000000068f28e80 type:MM_FILEPAGES val:33 [ 33.419518] BUG: Bad rss-counter state mm:0000000068f28e80 type:MM_ANONPAGES val:22 [ 33.812118] BUG: Bad rss-counter state mm:00000000e836b04b type:MM_FILEPAGES val:33 [ 33.813254] BUG: Bad rss-counter state mm:00000000e836b04b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13332' (ECDSA) to the list of known hosts. 2023/06/21 08:59:29 fuzzer started 2023/06/21 08:59:29 dialing manager at localhost:36067 2023/06/21 08:59:29 checking machine... 2023/06/21 08:59:29 checking revisions... [ 34.561023] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:59:30 testing simple program... [ 34.606402] cgroup: Unknown subsys name 'net' [ 34.650493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:29 Registers: info registers vcpu 0 RAX=ffff88800e593d00 RBX=0000000000000081 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff81f1734c RDI=ffff888018035970 RBP=ffff888008ab8c98 RSP=ffff888016d5f8e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000010000000 R14=1ffff11002dabf1e R15=0000000000000000 RIP=ffffffff81f17387 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 00007f6e56ab8900 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=00007f6e570700b0 CR3=000000000c4ea000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b381b RBX=0000000000000001 RCX=ffffffff864b381a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff864b381e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888008e07e78 R15=ffff88806cf09a78 RIP=ffffffff81130b8f 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 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=00007fc001424a70 CR3=0000000014194000 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=2039323a39353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000