syzkaller login: [ 31.238717] BUG: Bad rss-counter state mm:000000006d643ff3 type:MM_FILEPAGES val:33 [ 31.239794] BUG: Bad rss-counter state mm:000000006d643ff3 type:MM_ANONPAGES val:22 [ 31.407776] ================================================================== [ 31.408776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.409795] Read of size 8 at addr ffff88800ffdd968 by task sshd/220 [ 31.410751] [ 31.410990] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.411968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.413048] Call Trace: [ 31.413402] [ 31.413707] dump_stack_lvl+0x91/0xf0 [ 31.414232] print_report+0xcc/0x620 [ 31.414753] ? __virt_addr_valid+0x102/0x340 [ 31.415343] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416665] kasan_report+0xbe/0xf0 [ 31.417182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417869] vma_interval_tree_remove+0xc75/0xec0 [ 31.418536] vma_prepare+0xc54/0x11a0 [ 31.419066] __split_vma+0x5af/0x950 [ 31.419590] ? __pfx___split_vma+0x10/0x10 [ 31.420176] ? find_held_lock+0x2c/0x110 [ 31.420759] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.421408] ? lock_is_held_type+0x9f/0x120 [ 31.422005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.422673] ? mtree_range_walk+0x632/0x900 [ 31.423280] ? mas_walk+0x5c7/0x7c0 [ 31.423808] do_vmi_munmap+0x1f1/0x2b0 [ 31.424355] mmap_region+0x1f9/0x2660 [ 31.424889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.425465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.426259] ? __pfx_lock_acquire+0x10/0x10 [ 31.426853] ? __pfx_mmap_region+0x10/0x10 [ 31.427440] ? security_mmap_addr+0x7d/0xa0 [ 31.428032] ? get_unmapped_area+0x1f5/0x3f0 [ 31.428643] do_mmap+0x854/0xf00 [ 31.429146] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.429695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.430315] ksys_mmap_pgoff+0x3af/0x500 [ 31.430872] do_syscall_64+0x3f/0x90 [ 31.431400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.432119] RIP: 0033:0x7fed3e22ad82 [ 31.432629] 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 [ 31.434996] RSP: 002b:00007ffcce49d538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.436002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed3e22ad82 [ 31.436943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed3d664000 [ 31.437901] RBP: 00007fed3d664000 R08: 0000000000000009 R09: 0000000000001000 [ 31.438843] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adc3353ec0 [ 31.439784] R13: 00007ffcce49d550 R14: 00007ffcce49d580 R15: 00007ffcce49d8e0 [ 31.440731] [ 31.441061] [ 31.441304] Allocated by task 213: [ 31.441782] kasan_save_stack+0x22/0x50 [ 31.442342] kasan_set_track+0x25/0x30 [ 31.442889] __kasan_slab_alloc+0x59/0x70 [ 31.443463] kmem_cache_alloc+0x16b/0x370 [ 31.444033] vm_area_dup+0x20/0x160 [ 31.444540] __split_vma+0x170/0x950 [ 31.445062] split_vma+0xc6/0x110 [ 31.445551] mprotect_fixup+0x8d2/0xb30 [ 31.446103] do_mprotect_pkey+0x87e/0xd40 [ 31.446682] __x64_sys_mprotect+0x78/0xc0 [ 31.447261] do_syscall_64+0x3f/0x90 [ 31.447790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448495] [ 31.448736] Freed by task 19: [ 31.449183] kasan_save_stack+0x22/0x50 [ 31.449740] kasan_set_track+0x25/0x30 [ 31.450287] kasan_save_free_info+0x2b/0x50 [ 31.450878] __kasan_slab_free+0x10a/0x190 [ 31.451466] kmem_cache_free+0x10d/0x4d0 [ 31.452106] rcu_core+0x8c8/0x2860 [ 31.452599] __do_softirq+0x1b7/0x7d4 [ 31.453140] [ 31.453376] Last potentially related work creation: [ 31.454023] kasan_save_stack+0x22/0x50 [ 31.454579] __kasan_record_aux_stack+0x8e/0xa0 [ 31.455214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.455920] remove_vma+0x139/0x170 [ 31.456416] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.457045] do_vmi_munmap+0x1f1/0x2b0 [ 31.457582] __vm_munmap+0x138/0x3a0 [ 31.458103] __x64_sys_munmap+0x59/0x80 [ 31.458656] do_syscall_64+0x3f/0x90 [ 31.459183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459891] [ 31.460129] The buggy address belongs to the object at ffff88800ffdd910 [ 31.460129] which belongs to the cache vm_area_struct of size 168 [ 31.461765] The buggy address is located 88 bytes inside of [ 31.461765] freed 168-byte region [ffff88800ffdd910, ffff88800ffdd9b8) [ 31.463319] [ 31.463559] The buggy address belongs to the physical page: [ 31.464278] page:00000000e9a77160 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffdd [ 31.465493] memcg:ffff88800ebfc201 [ 31.465965] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.466694] page_type: 0xffffffff() [ 31.467191] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.468213] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebfc201 [ 31.469231] page dumped because: kasan: bad access detected [ 31.469970] [ 31.470204] Memory state around the buggy address: [ 31.470852] ffff88800ffdd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.471798] ffff88800ffdd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.472745] >ffff88800ffdd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.473698] ^ [ 31.474559] ffff88800ffdd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.475507] ffff88800ffdda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.476454] ================================================================== [ 31.477557] Disabling lock debugging due to kernel taint [ 34.259652] BUG: Bad rss-counter state mm:000000006420d94a type:MM_FILEPAGES val:33 [ 34.260808] BUG: Bad rss-counter state mm:000000006420d94a type:MM_ANONPAGES val:22 [ 34.713712] BUG: Bad rss-counter state mm:00000000c6604aca type:MM_FILEPAGES val:33 [ 34.714543] BUG: Bad rss-counter state mm:00000000c6604aca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61829' (ECDSA) to the list of known hosts. 2023/06/19 22:06:08 fuzzer started 2023/06/19 22:06:08 dialing manager at localhost:44161 2023/06/19 22:06:08 checking machine... 2023/06/19 22:06:08 checking revisions... [ 35.442702] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:06:08 testing simple program... [ 35.477962] cgroup: Unknown subsys name 'net' [ 35.518382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801d1e78c8 RCX=0000000000000001 RDX=1ffff11003a3cf1a RSI=ffff88801d1e78c0 RDI=ffff88801d1e78d0 RBP=ffff88801d1e78c0 RSP=ffff88801d1e77d0 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88801d1e7910 R14=ffff88801d1e78c8 R15=ffff88801d1e78c8 RIP=ffffffff81130445 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 00007f7ff6cc9900 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=00007ffca545b000 CR3=000000001d262000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6dc43ddf10 CR3=000000000e4d8000 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=2038303a36303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000