syzkaller login: [ 36.635365] BUG: Bad rss-counter state mm:00000000f122f3bc type:MM_FILEPAGES val:33 [ 36.636227] BUG: Bad rss-counter state mm:00000000f122f3bc type:MM_ANONPAGES val:22 [ 36.802476] ================================================================== [ 36.803571] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.804699] Read of size 8 at addr ffff88800eea7880 by task sshd/219 [ 36.805723] [ 36.805961] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.806848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.807852] Call Trace: [ 36.808176] [ 36.808459] dump_stack_lvl+0x91/0xf0 [ 36.808953] print_report+0xcc/0x620 [ 36.809435] ? __virt_addr_valid+0x102/0x340 [ 36.809992] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.810622] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.811250] kasan_report+0xbe/0xf0 [ 36.811737] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.812374] vma_interval_tree_remove+0xc75/0xec0 [ 36.812974] vma_prepare+0xc54/0x11a0 [ 36.813469] __split_vma+0x5af/0x950 [ 36.813947] ? __pfx___split_vma+0x10/0x10 [ 36.814482] ? find_held_lock+0x2c/0x110 [ 36.815035] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.815604] ? lock_is_held_type+0x9f/0x120 [ 36.816148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.816761] ? mtree_range_walk+0x632/0x900 [ 36.817316] ? mas_walk+0x5c7/0x7c0 [ 36.817793] do_vmi_munmap+0x1f1/0x2b0 [ 36.818311] mmap_region+0x1f9/0x2660 [ 36.818813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.819336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.820080] ? __pfx_lock_acquire+0x10/0x10 [ 36.820628] ? __pfx_mmap_region+0x10/0x10 [ 36.821169] ? security_mmap_addr+0x7d/0xa0 [ 36.821711] ? get_unmapped_area+0x1f5/0x3f0 [ 36.822268] do_mmap+0x854/0xf00 [ 36.822748] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.823247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.823817] ksys_mmap_pgoff+0x3af/0x500 [ 36.824326] do_syscall_64+0x3f/0x90 [ 36.824815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.825470] RIP: 0033:0x7f414a01ed82 [ 36.825937] 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 [ 36.828112] RSP: 002b:00007ffec693e158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.829020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f414a01ed82 [ 36.829875] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4149458000 [ 36.830739] RBP: 00007f4149458000 R08: 0000000000000009 R09: 0000000000001000 [ 36.831602] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f07259f70 [ 36.832469] R13: 00007ffec693e170 R14: 00007ffec693e1a0 R15: 00007ffec693e500 [ 36.833347] [ 36.833638] [ 36.833853] Allocated by task 212: [ 36.834293] kasan_save_stack+0x22/0x50 [ 36.834830] kasan_set_track+0x25/0x30 [ 36.835337] __kasan_slab_alloc+0x59/0x70 [ 36.835862] kmem_cache_alloc+0x16b/0x370 [ 36.836389] vm_area_dup+0x20/0x160 [ 36.836851] __split_vma+0x170/0x950 [ 36.837316] split_vma+0xc6/0x110 [ 36.837761] mprotect_fixup+0x8d2/0xb30 [ 36.838266] do_mprotect_pkey+0x87e/0xd40 [ 36.838801] __x64_sys_mprotect+0x78/0xc0 [ 36.839325] do_syscall_64+0x3f/0x90 [ 36.839807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.840472] [ 36.840686] Freed by task 212: [ 36.841082] kasan_save_stack+0x22/0x50 [ 36.841595] kasan_set_track+0x25/0x30 [ 36.842092] kasan_save_free_info+0x2b/0x50 [ 36.842641] __kasan_slab_free+0x10a/0x190 [ 36.843183] kmem_cache_free+0x10d/0x4d0 [ 36.843693] rcu_core+0x8c8/0x2860 [ 36.844146] __do_softirq+0x1b7/0x7d4 [ 36.844629] [ 36.844844] Last potentially related work creation: [ 36.845436] kasan_save_stack+0x22/0x50 [ 36.845937] __kasan_record_aux_stack+0x8e/0xa0 [ 36.846531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.847193] remove_vma+0x139/0x170 [ 36.847649] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.848218] do_vmi_munmap+0x1f1/0x2b0 [ 36.848713] __vm_munmap+0x138/0x3a0 [ 36.849176] __x64_sys_munmap+0x59/0x80 [ 36.849680] do_syscall_64+0x3f/0x90 [ 36.850160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.850823] [ 36.851040] The buggy address belongs to the object at ffff88800eea7828 [ 36.851040] which belongs to the cache vm_area_struct of size 168 [ 36.852517] The buggy address is located 88 bytes inside of [ 36.852517] freed 168-byte region [ffff88800eea7828, ffff88800eea78d0) [ 36.853933] [ 36.854152] The buggy address belongs to the physical page: [ 36.854818] page:000000009c552837 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea7 [ 36.855923] memcg:ffff88800e5f4f01 [ 36.856375] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.857076] page_type: 0xffffffff() [ 36.857526] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.858458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f4f01 [ 36.859400] page dumped because: kasan: bad access detected [ 36.860059] [ 36.860277] Memory state around the buggy address: [ 36.860860] ffff88800eea7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.861750] ffff88800eea7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.862633] >ffff88800eea7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.863496] ^ [ 36.863911] ffff88800eea7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.864778] ffff88800eea7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 36.865637] ================================================================== [ 36.866673] Disabling lock debugging due to kernel taint [ 39.734478] BUG: Bad rss-counter state mm:0000000056a63677 type:MM_FILEPAGES val:33 [ 39.735515] BUG: Bad rss-counter state mm:0000000056a63677 type:MM_ANONPAGES val:22 [ 40.216886] BUG: Bad rss-counter state mm:00000000018d997d type:MM_FILEPAGES val:33 [ 40.218040] BUG: Bad rss-counter state mm:00000000018d997d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52818' (ECDSA) to the list of known hosts. 2023/06/19 12:57:27 fuzzer started 2023/06/19 12:57:28 dialing manager at localhost:44161 2023/06/19 12:57:28 checking machine... 2023/06/19 12:57:28 checking revisions... [ 40.951718] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:57:28 testing simple program... [ 40.998121] cgroup: Unknown subsys name 'net' [ 41.055484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:57:26 Registers: info registers vcpu 0 RAX=ffffffff83c23170 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801652f901 RSI=ffff88801652f9b8 RDI=ffff88801652f9b8 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff863b18a4 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008a8ce R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88801652f9c0 R15=ffff88806ce09a50 RIP=ffffffff81131041 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 00007fc2b2569700 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=00007f2f915d0e90 CR3=000000000ce58000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36323137342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363231 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=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=00007ffd3757b408 CR3=0000000005482000 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=00007faeb1ad3510000055b2e6525790 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