syzkaller login: [ 31.139111] BUG: Bad rss-counter state mm:0000000032add91b type:MM_FILEPAGES val:33 [ 31.140319] BUG: Bad rss-counter state mm:0000000032add91b type:MM_ANONPAGES val:22 [ 31.179148] ================================================================== [ 31.180210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.181246] Read of size 8 at addr ffff888017469140 by task sshd/220 [ 31.182053] [ 31.182280] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.183152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.184181] Call Trace: [ 31.184506] [ 31.184807] dump_stack_lvl+0x91/0xf0 [ 31.185309] print_report+0xcc/0x620 [ 31.185810] ? __virt_addr_valid+0x102/0x340 [ 31.186393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187688] kasan_report+0xbe/0xf0 [ 31.188179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188802] vma_interval_tree_remove+0xc75/0xec0 [ 31.189427] vma_prepare+0xc54/0x11a0 [ 31.189938] __split_vma+0x5af/0x950 [ 31.190464] ? __pfx___split_vma+0x10/0x10 [ 31.191039] ? find_held_lock+0x2c/0x110 [ 31.191643] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.192248] ? lock_is_held_type+0x9f/0x120 [ 31.192827] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.193478] ? mtree_range_walk+0x632/0x900 [ 31.194090] ? mas_walk+0x5c7/0x7c0 [ 31.194601] do_vmi_munmap+0x1f1/0x2b0 [ 31.195124] mmap_region+0x1f9/0x2660 [ 31.195668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.196212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.196976] ? __pfx_lock_acquire+0x10/0x10 [ 31.197543] ? __pfx_mmap_region+0x10/0x10 [ 31.198126] ? security_mmap_addr+0x7d/0xa0 [ 31.198700] ? get_unmapped_area+0x1f5/0x3f0 [ 31.199287] do_mmap+0x854/0xf00 [ 31.199797] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.200332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.200934] ksys_mmap_pgoff+0x3af/0x500 [ 31.201479] do_syscall_64+0x3f/0x90 [ 31.202007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202699] RIP: 0033:0x7f03781f9d82 [ 31.203191] 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 [ 31.205508] RSP: 002b:00007ffe00e71a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.206506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03781f9d82 [ 31.207427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0377633000 [ 31.208354] RBP: 00007f0377633000 R08: 0000000000000009 R09: 0000000000001000 [ 31.209258] R10: 0000000000000812 R11: 0000000000000206 R12: 000056290d6b5ec0 [ 31.210181] R13: 00007ffe00e71a90 R14: 00007ffe00e71ac0 R15: 00007ffe00e71e20 [ 31.211090] [ 31.211410] [ 31.211677] Allocated by task 213: [ 31.212136] kasan_save_stack+0x22/0x50 [ 31.212670] kasan_set_track+0x25/0x30 [ 31.213189] __kasan_slab_alloc+0x59/0x70 [ 31.213748] kmem_cache_alloc+0x16b/0x370 [ 31.214329] vm_area_dup+0x20/0x160 [ 31.214816] __split_vma+0x170/0x950 [ 31.215310] split_vma+0xc6/0x110 [ 31.215810] mprotect_fixup+0x8d2/0xb30 [ 31.216347] do_mprotect_pkey+0x87e/0xd40 [ 31.216893] __x64_sys_mprotect+0x78/0xc0 [ 31.217453] do_syscall_64+0x3f/0x90 [ 31.217957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218657] [ 31.218882] Freed by task 213: [ 31.219298] kasan_save_stack+0x22/0x50 [ 31.219880] kasan_set_track+0x25/0x30 [ 31.220416] kasan_save_free_info+0x2b/0x50 [ 31.220990] __kasan_slab_free+0x10a/0x190 [ 31.221559] kmem_cache_free+0x10d/0x4d0 [ 31.222124] rcu_core+0x8c8/0x2860 [ 31.222604] __do_softirq+0x1b7/0x7d4 [ 31.223126] [ 31.223354] Last potentially related work creation: [ 31.224011] kasan_save_stack+0x22/0x50 [ 31.224543] __kasan_record_aux_stack+0x8e/0xa0 [ 31.225162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.225846] remove_vma+0x139/0x170 [ 31.226352] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.226954] do_vmi_munmap+0x1f1/0x2b0 [ 31.227503] __vm_munmap+0x138/0x3a0 [ 31.228007] __x64_sys_munmap+0x59/0x80 [ 31.228549] do_syscall_64+0x3f/0x90 [ 31.229054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229745] [ 31.229980] The buggy address belongs to the object at ffff8880174690e8 [ 31.229980] which belongs to the cache vm_area_struct of size 168 [ 31.231610] The buggy address is located 88 bytes inside of [ 31.231610] freed 168-byte region [ffff8880174690e8, ffff888017469190) [ 31.233122] [ 31.233352] The buggy address belongs to the physical page: [ 31.234087] page:00000000ccc397bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17469 [ 31.235268] memcg:ffff888018d6f801 [ 31.235756] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.236451] page_type: 0xffffffff() [ 31.236926] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.237909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d6f801 [ 31.238907] page dumped because: kasan: bad access detected [ 31.239644] [ 31.239871] Memory state around the buggy address: [ 31.240492] ffff888017469000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.241417] ffff888017469080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.242355] >ffff888017469100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243266] ^ [ 31.243983] ffff888017469180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.244910] ffff888017469200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.245836] ================================================================== [ 31.246955] Disabling lock debugging due to kernel taint [ 33.636829] BUG: Bad rss-counter state mm:00000000353f3802 type:MM_FILEPAGES val:33 [ 33.637866] BUG: Bad rss-counter state mm:00000000353f3802 type:MM_ANONPAGES val:22 [ 34.185297] BUG: Bad rss-counter state mm:00000000a269d3ad type:MM_FILEPAGES val:33 [ 34.186487] BUG: Bad rss-counter state mm:00000000a269d3ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24397' (ECDSA) to the list of known hosts. 2023/06/21 03:33:34 fuzzer started 2023/06/21 03:33:34 dialing manager at localhost:36067 2023/06/21 03:33:34 checking machine... 2023/06/21 03:33:34 checking revisions... [ 34.837180] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:33:34 testing simple program... [ 34.891032] cgroup: Unknown subsys name 'net' [ 34.934368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:34 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801a003680 RSI=ffffffff814c8584 RDI=ffff88801a003a74 RBP=0000000000000000 RSP=ffff888015d2f470 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=1ffff11002ba5f1d RIP=ffffffff814c0880 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 00007f2d1bb73700 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=00007ffecb3f0cb8 CR3=000000000e288000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034333a3333 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed1002b91f43 RSP=ffff888015c8fa08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000cc0 R15=ffffffff8366a63c RIP=ffffffff812d8a35 RFL=00000282 [--S----] 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 00007f06d9554900 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=00007ffc8cac5000 CR3=000000001661c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000