syzkaller login: [ 31.671781] BUG: Bad rss-counter state mm:000000004ab62878 type:MM_FILEPAGES val:33 [ 31.673040] BUG: Bad rss-counter state mm:000000004ab62878 type:MM_ANONPAGES val:22 [ 31.821078] ================================================================== [ 31.822011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.822982] Read of size 8 at addr ffff88800d606a50 by task sshd/220 [ 31.823771] [ 31.823995] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.825017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.826031] Call Trace: [ 31.826352] [ 31.826660] dump_stack_lvl+0x91/0xf0 [ 31.827161] print_report+0xcc/0x620 [ 31.827663] ? __virt_addr_valid+0x102/0x340 [ 31.828245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.828879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.829513] kasan_report+0xbe/0xf0 [ 31.829991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.830649] vma_interval_tree_remove+0xc75/0xec0 [ 31.831262] vma_prepare+0xc54/0x11a0 [ 31.831757] __split_vma+0x5af/0x950 [ 31.832257] ? __pfx___split_vma+0x10/0x10 [ 31.832804] ? find_held_lock+0x2c/0x110 [ 31.833348] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.833930] ? lock_is_held_type+0x9f/0x120 [ 31.834484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.835109] ? mtree_range_walk+0x632/0x900 [ 31.835687] ? mas_walk+0x5c7/0x7c0 [ 31.836206] do_vmi_munmap+0x1f1/0x2b0 [ 31.836711] mmap_region+0x1f9/0x2660 [ 31.837206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.837733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.838473] ? __pfx_lock_acquire+0x10/0x10 [ 31.839033] ? __pfx_mmap_region+0x10/0x10 [ 31.839581] ? security_mmap_addr+0x7d/0xa0 [ 31.840137] ? get_unmapped_area+0x1f5/0x3f0 [ 31.840718] do_mmap+0x854/0xf00 [ 31.841178] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.841682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.842262] ksys_mmap_pgoff+0x3af/0x500 [ 31.842796] do_syscall_64+0x3f/0x90 [ 31.843292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.843976] RIP: 0033:0x7f7495368d82 [ 31.844462] 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 [ 31.846664] RSP: 002b:00007ffdc44965c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.847601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7495368d82 [ 31.848497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74947a2000 [ 31.849365] RBP: 00007f74947a2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.850246] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638a9934f70 [ 31.851114] R13: 00007ffdc44965e0 R14: 00007ffdc4496610 R15: 00007ffdc4496970 [ 31.852004] [ 31.852320] [ 31.852543] Allocated by task 213: [ 31.852990] kasan_save_stack+0x22/0x50 [ 31.853521] kasan_set_track+0x25/0x30 [ 31.854038] __kasan_slab_alloc+0x59/0x70 [ 31.854586] kmem_cache_alloc+0x16b/0x370 [ 31.855124] vm_area_dup+0x20/0x160 [ 31.855597] __split_vma+0x170/0x950 [ 31.856074] split_vma+0xc6/0x110 [ 31.856557] mprotect_fixup+0x8d2/0xb30 [ 31.857080] do_mprotect_pkey+0x87e/0xd40 [ 31.857620] __x64_sys_mprotect+0x78/0xc0 [ 31.858150] do_syscall_64+0x3f/0x90 [ 31.858643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859305] [ 31.859526] Freed by task 213: [ 31.859931] kasan_save_stack+0x22/0x50 [ 31.860469] kasan_set_track+0x25/0x30 [ 31.860982] kasan_save_free_info+0x2b/0x50 [ 31.861533] __kasan_slab_free+0x10a/0x190 [ 31.862084] kmem_cache_free+0x10d/0x4d0 [ 31.862612] rcu_core+0x8c8/0x2860 [ 31.863069] __do_softirq+0x1b7/0x7d4 [ 31.863567] [ 31.863792] Last potentially related work creation: [ 31.864400] kasan_save_stack+0x22/0x50 [ 31.864923] __kasan_record_aux_stack+0x8e/0xa0 [ 31.865515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.866192] remove_vma+0x139/0x170 [ 31.866668] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.867254] do_vmi_munmap+0x1f1/0x2b0 [ 31.867764] __vm_munmap+0x138/0x3a0 [ 31.868267] __x64_sys_munmap+0x59/0x80 [ 31.868785] do_syscall_64+0x3f/0x90 [ 31.869276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869926] [ 31.870138] The buggy address belongs to the object at ffff88800d6069f8 [ 31.870138] which belongs to the cache vm_area_struct of size 168 [ 31.871593] The buggy address is located 88 bytes inside of [ 31.871593] freed 168-byte region [ffff88800d6069f8, ffff88800d606aa0) [ 31.873005] [ 31.873226] The buggy address belongs to the physical page: [ 31.873909] page:0000000039beb04d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd606 [ 31.875011] memcg:ffff88800e1b6001 [ 31.875446] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.876098] page_type: 0xffffffff() [ 31.876569] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.877499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b6001 [ 31.878398] page dumped because: kasan: bad access detected [ 31.879053] [ 31.879276] Memory state around the buggy address: [ 31.879854] ffff88800d606900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.880724] ffff88800d606980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.881564] >ffff88800d606a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.882405] ^ [ 31.883100] ffff88800d606a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.884007] ffff88800d606b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.884907] ================================================================== [ 31.886029] Disabling lock debugging due to kernel taint [ 33.935442] BUG: Bad rss-counter state mm:00000000f669a775 type:MM_FILEPAGES val:33 [ 33.936459] BUG: Bad rss-counter state mm:00000000f669a775 type:MM_ANONPAGES val:22 [ 34.421146] BUG: Bad rss-counter state mm:00000000cc61b446 type:MM_FILEPAGES val:33 [ 34.422176] BUG: Bad rss-counter state mm:00000000cc61b446 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5196' (ECDSA) to the list of known hosts. 2023/06/20 23:16:00 fuzzer started 2023/06/20 23:16:00 dialing manager at localhost:36067 2023/06/20 23:16:00 checking machine... 2023/06/20 23:16:00 checking revisions... [ 35.160892] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:16:00 testing simple program... [ 35.214869] cgroup: Unknown subsys name 'net' [ 35.252130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:16:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f40d9655330 CR3=000000000d6d0000 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=8e513b0a5dbe56ace443adcc497c5103 XMM02=000000000011bb28ec2efd57dc4c00df XMM03=00000000001225585e7e8ff1f04ae9a6 XMM04=c59c58164399b3cf00000000000ae988 XMM05=19e9129bd510f23500000000001323d0 XMM06=cb78440d85dfe1520000000000131238 XMM07=e042d86d42eb936e00000000001227d8 XMM08=5e7e8ff1f04ae9a6000000000011bb88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff810ac4e5 RDX=1ffff11001bdb6d0 RSI=0000000000000008 RDI=ffff88800dedb680 RBP=ffff88800dedb680 RSP=ffff888015b27ee8 R8 =0000000000000000 R9 =ffffed1001bdb6d0 R10=ffff88800dedb687 R11=00000000000b6a61 R12=ffff888015b27f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ac4fa 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 00007f03cde9b900 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=00007ffe95759000 CR3=000000001a3e0000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000