syzkaller login: [ 30.590883] BUG: Bad rss-counter state mm:000000000fb7937d type:MM_FILEPAGES val:33 [ 30.592150] BUG: Bad rss-counter state mm:000000000fb7937d type:MM_ANONPAGES val:22 [ 30.633307] ================================================================== [ 30.634376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.635520] Read of size 8 at addr ffff888015884ed8 by task sshd/219 [ 30.636289] [ 30.636534] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.637581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.638716] Call Trace: [ 30.639034] [ 30.639416] dump_stack_lvl+0x91/0xf0 [ 30.639976] print_report+0xcc/0x620 [ 30.640563] ? __virt_addr_valid+0x102/0x340 [ 30.641218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642481] kasan_report+0xbe/0xf0 [ 30.642956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643587] vma_interval_tree_remove+0xc75/0xec0 [ 30.644366] vma_prepare+0xc54/0x11a0 [ 30.644849] __split_vma+0x5af/0x950 [ 30.645333] ? __pfx___split_vma+0x10/0x10 [ 30.645867] ? find_held_lock+0x2c/0x110 [ 30.646410] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.646975] ? lock_is_held_type+0x9f/0x120 [ 30.647524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.648130] ? mtree_range_walk+0x632/0x900 [ 30.648685] ? mas_walk+0x5c7/0x7c0 [ 30.649163] do_vmi_munmap+0x1f1/0x2b0 [ 30.649677] mmap_region+0x1f9/0x2660 [ 30.650157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.650674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651390] ? __pfx_lock_acquire+0x10/0x10 [ 30.651921] ? __pfx_mmap_region+0x10/0x10 [ 30.652456] ? security_mmap_addr+0x7d/0xa0 [ 30.652986] ? get_unmapped_area+0x1f5/0x3f0 [ 30.653555] do_mmap+0x854/0xf00 [ 30.653998] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.655064] ksys_mmap_pgoff+0x3af/0x500 [ 30.655573] do_syscall_64+0x3f/0x90 [ 30.656058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656710] RIP: 0033:0x7f5aa369ad82 [ 30.657176] 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 [ 30.659336] RSP: 002b:00007ffc842a4608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5aa369ad82 [ 30.661097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5aa2ad4000 [ 30.661971] RBP: 00007f5aa2ad4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.662821] R10: 0000000000000812 R11: 0000000000000206 R12: 000056418b51cec0 [ 30.663677] R13: 00007ffc842a4620 R14: 00007ffc842a4650 R15: 00007ffc842a49b0 [ 30.664544] [ 30.664836] [ 30.665051] Allocated by task 212: [ 30.665486] kasan_save_stack+0x22/0x50 [ 30.665998] kasan_set_track+0x25/0x30 [ 30.666496] __kasan_slab_alloc+0x59/0x70 [ 30.667023] kmem_cache_alloc+0x16b/0x370 [ 30.667548] vm_area_dup+0x20/0x160 [ 30.668017] __split_vma+0x170/0x950 [ 30.668530] split_vma+0xc6/0x110 [ 30.668992] mprotect_fixup+0x8d2/0xb30 [ 30.669514] do_mprotect_pkey+0x87e/0xd40 [ 30.670060] __x64_sys_mprotect+0x78/0xc0 [ 30.670596] do_syscall_64+0x3f/0x90 [ 30.671088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671742] [ 30.671966] Freed by task 212: [ 30.672374] kasan_save_stack+0x22/0x50 [ 30.672891] kasan_set_track+0x25/0x30 [ 30.673405] kasan_save_free_info+0x2b/0x50 [ 30.673978] __kasan_slab_free+0x10a/0x190 [ 30.674535] kmem_cache_free+0x10d/0x4d0 [ 30.675063] rcu_core+0x8c8/0x2860 [ 30.675525] __do_softirq+0x1b7/0x7d4 [ 30.676029] [ 30.676247] Last potentially related work creation: [ 30.676833] kasan_save_stack+0x22/0x50 [ 30.677344] __kasan_record_aux_stack+0x8e/0xa0 [ 30.677960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.678663] remove_vma+0x139/0x170 [ 30.679159] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.679770] do_vmi_munmap+0x1f1/0x2b0 [ 30.680296] __vm_munmap+0x138/0x3a0 [ 30.680806] __x64_sys_munmap+0x59/0x80 [ 30.681347] do_syscall_64+0x3f/0x90 [ 30.681879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.682574] [ 30.682802] The buggy address belongs to the object at ffff888015884e80 [ 30.682802] which belongs to the cache vm_area_struct of size 168 [ 30.684378] The buggy address is located 88 bytes inside of [ 30.684378] freed 168-byte region [ffff888015884e80, ffff888015884f28) [ 30.685916] [ 30.686148] The buggy address belongs to the physical page: [ 30.686864] page:000000004f3806d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15884 [ 30.688030] memcg:ffff888015805501 [ 30.688484] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.689171] page_type: 0xffffffff() [ 30.689674] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.690661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015805501 [ 30.691638] page dumped because: kasan: bad access detected [ 30.692358] [ 30.692587] Memory state around the buggy address: [ 30.693203] ffff888015884d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.694133] ffff888015884e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.695038] >ffff888015884e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.695936] ^ [ 30.696694] ffff888015884f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.697629] ffff888015884f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.698600] ================================================================== [ 30.699882] Disabling lock debugging due to kernel taint [ 32.768281] BUG: Bad rss-counter state mm:00000000aad3d8f0 type:MM_FILEPAGES val:33 [ 32.769490] BUG: Bad rss-counter state mm:00000000aad3d8f0 type:MM_ANONPAGES val:22 [ 33.333257] BUG: Bad rss-counter state mm:00000000e2a365a3 type:MM_FILEPAGES val:33 [ 33.334418] BUG: Bad rss-counter state mm:00000000e2a365a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63123' (ECDSA) to the list of known hosts. 2023/06/21 07:44:04 fuzzer started 2023/06/21 07:44:05 dialing manager at localhost:36067 2023/06/21 07:44:05 checking machine... 2023/06/21 07:44:05 checking revisions... [ 33.993389] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:44:05 testing simple program... [ 34.046135] cgroup: Unknown subsys name 'net' [ 34.083725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf39500 RBP=ffff888015e0f8e0 RSP=ffff888015e0f708 R8 =0000000000000000 R9 =ffffed100d9e72a0 R10=ffff88806cf39503 R11=ffff888008c04000 R12=ffff88806cf39fe8 R13=ffff88806cf39500 R14=ffff888008e0d268 R15=dffffc0000000000 RIP=ffffffff8126dad3 RFL=00000046 [---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 00007f99e3fff700 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=00007fb9e2828b58 CR3=000000000dab4000 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=2034303a34343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34343a3730203132 XMM08=747379733a755f6d65747379733d6a62 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801657fc48 RCX=0000000000000000 RDX=1ffff11001d2e5c0 RSI=ffffffff81859666 RDI=ffff88800e972e00 RBP=ffff88801657fb00 RSP=ffff88801657faf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800e972c80 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff81859684 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 00007f3e49c29900 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=00007fff868ee000 CR3=0000000019ca4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000