syzkaller login: [ 31.406494] BUG: Bad rss-counter state mm:00000000dae451e5 type:MM_FILEPAGES val:33 [ 31.407135] BUG: Bad rss-counter state mm:00000000dae451e5 type:MM_ANONPAGES val:22 [ 31.622101] ================================================================== [ 31.622668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.623275] Read of size 8 at addr ffff8880096a8df0 by task sshd/222 [ 31.623722] [ 31.623878] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.624391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.626247] Call Trace: [ 31.626439] [ 31.626610] dump_stack_lvl+0x91/0xf0 [ 31.626903] print_report+0xcc/0x620 [ 31.627195] ? __virt_addr_valid+0x102/0x340 [ 31.627516] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.628249] kasan_report+0xbe/0xf0 [ 31.628530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.629028] vma_interval_tree_remove+0xc75/0xec0 [ 31.629437] vma_prepare+0xc54/0x11a0 [ 31.629721] __split_vma+0x5af/0x950 [ 31.630015] ? __pfx___split_vma+0x10/0x10 [ 31.630379] ? find_held_lock+0x2c/0x110 [ 31.630690] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.631038] ? lock_is_held_type+0x9f/0x120 [ 31.631460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.631822] ? mtree_range_walk+0x632/0x900 [ 31.632158] ? mas_walk+0x5c7/0x7c0 [ 31.632513] do_vmi_munmap+0x1f1/0x2b0 [ 31.632838] mmap_region+0x1f9/0x2660 [ 31.633125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.633489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.633920] ? __pfx_lock_acquire+0x10/0x10 [ 31.634416] ? __pfx_mmap_region+0x10/0x10 [ 31.634734] ? security_mmap_addr+0x7d/0xa0 [ 31.635095] ? get_unmapped_area+0x1f5/0x3f0 [ 31.635471] do_mmap+0x854/0xf00 [ 31.635730] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.636052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.636473] ksys_mmap_pgoff+0x3af/0x500 [ 31.636805] do_syscall_64+0x3f/0x90 [ 31.637086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.637515] RIP: 0033:0x7f249edc7d82 [ 31.637785] 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 [ 31.639063] RSP: 002b:00007ffe4a54d268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.639645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f249edc7d82 [ 31.640139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f249e201000 [ 31.640720] RBP: 00007f249e201000 R08: 0000000000000009 R09: 0000000000001000 [ 31.641214] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d8268cec0 [ 31.641761] R13: 00007ffe4a54d280 R14: 00007ffe4a54d2b0 R15: 00007ffe4a54d610 [ 31.642309] [ 31.642485] [ 31.642615] Allocated by task 213: [ 31.642868] kasan_save_stack+0x22/0x50 [ 31.643162] kasan_set_track+0x25/0x30 [ 31.643507] __kasan_slab_alloc+0x59/0x70 [ 31.643820] kmem_cache_alloc+0x16b/0x370 [ 31.644169] vm_area_dup+0x20/0x160 [ 31.644508] __split_vma+0x170/0x950 [ 31.644825] split_vma+0xc6/0x110 [ 31.645112] mprotect_fixup+0x8d2/0xb30 [ 31.645463] do_mprotect_pkey+0x87e/0xd40 [ 31.645776] __x64_sys_mprotect+0x78/0xc0 [ 31.646089] do_syscall_64+0x3f/0x90 [ 31.646423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646803] [ 31.646926] Freed by task 213: [ 31.650901] kasan_save_stack+0x22/0x50 [ 31.651198] kasan_set_track+0x25/0x30 [ 31.651612] kasan_save_free_info+0x2b/0x50 [ 31.651923] __kasan_slab_free+0x10a/0x190 [ 31.652281] kmem_cache_free+0x10d/0x4d0 [ 31.652581] rcu_core+0x8c8/0x2860 [ 31.652884] __do_softirq+0x1b7/0x7d4 [ 31.653220] [ 31.653403] Last potentially related work creation: [ 31.653750] kasan_save_stack+0x22/0x50 [ 31.654078] __kasan_record_aux_stack+0x8e/0xa0 [ 31.654648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.655030] remove_vma+0x139/0x170 [ 31.655347] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.655684] do_vmi_munmap+0x1f1/0x2b0 [ 31.655978] __vm_munmap+0x138/0x3a0 [ 31.656300] __x64_sys_munmap+0x59/0x80 [ 31.656597] do_syscall_64+0x3f/0x90 [ 31.656921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.657823] [ 31.657980] The buggy address belongs to the object at ffff8880096a8d98 [ 31.657980] which belongs to the cache vm_area_struct of size 168 [ 31.658907] The buggy address is located 88 bytes inside of [ 31.658907] freed 168-byte region [ffff8880096a8d98, ffff8880096a8e40) [ 31.659774] [ 31.659911] The buggy address belongs to the physical page: [ 31.660341] page:000000006e95f120 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96a8 [ 31.661009] memcg:ffff888009496801 [ 31.661304] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.661684] page_type: 0xffffffff() [ 31.661970] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.662617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009496801 [ 31.663177] page dumped because: kasan: bad access detected [ 31.663600] [ 31.663732] Memory state around the buggy address: [ 31.664067] ffff8880096a8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.664616] ffff8880096a8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.665184] >ffff8880096a8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.665733] ^ [ 31.666210] ffff8880096a8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.666796] ffff8880096a8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.667353] ================================================================== [ 31.685041] Disabling lock debugging due to kernel taint [ 40.249459] BUG: Bad rss-counter state mm:00000000e7bc2f80 type:MM_FILEPAGES val:33 [ 40.250067] BUG: Bad rss-counter state mm:00000000e7bc2f80 type:MM_ANONPAGES val:22 [ 41.604331] BUG: Bad rss-counter state mm:00000000a9fe326b type:MM_FILEPAGES val:33 [ 41.609177] BUG: Bad rss-counter state mm:00000000a9fe326b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42733' (ECDSA) to the list of known hosts. 2023/06/20 10:22:55 fuzzer started 2023/06/20 10:22:55 dialing manager at localhost:44161 2023/06/20 10:22:55 checking machine... 2023/06/20 10:22:55 checking revisions... 2023/06/20 10:22:56 testing simple program... [ 42.440747] kmemleak: Automatic memory scanning thread ended [ 42.486704] cgroup: Unknown subsys name 'net' [ 42.537922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:55 Registers: info registers vcpu 0 RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd RSI=ffffffff82505f50 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff88801643f928 R8 =0000000000000004 R9 =0000000000000010 R10=0000000000000010 R11=000000003a475542 R12=0000000000002710 R13=0000000000000020 R14=fffffbfff0fed866 R15=dffffc0000000000 RIP=ffffffff82505fa5 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 0000000000000000 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=00007ffc80634fe8 CR3=0000000005482000 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=00007f505015951000005565b2f5f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002057f16 RSI=ffff8880102bff48 RDI=ffffffff846000aa RBP=ffff8880102bf8f0 RSP=ffff8880102bf858 R8 =0000000000000001 R9 =ffff8880102bf898 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880102bf920 R13=0000000000000000 R14=ffff88800dc28000 R15=0000000000000cc0 RIP=ffffffff810bd06d 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 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=00007fc275d1f028 CR3=0000000015950000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e7061727762696c2f756e672d78 XMM02=00302e6f732e7061727762696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000