syzkaller login: [ 30.463438] BUG: Bad rss-counter state mm:000000007994b1c6 type:MM_FILEPAGES val:33 [ 30.464195] BUG: Bad rss-counter state mm:000000007994b1c6 type:MM_ANONPAGES val:22 [ 30.583791] ================================================================== [ 30.584440] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.585115] Read of size 8 at addr ffff888014706968 by task sshd/220 [ 30.585661] [ 30.585844] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.586457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.587169] Call Trace: [ 30.587392] [ 30.587595] dump_stack_lvl+0x91/0xf0 [ 30.587939] print_report+0xcc/0x620 [ 30.588591] ? __virt_addr_valid+0x102/0x340 [ 30.588993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.589445] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.589883] kasan_report+0xbe/0xf0 [ 30.590217] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.590680] vma_interval_tree_remove+0xc75/0xec0 [ 30.591139] vma_prepare+0xc54/0x11a0 [ 30.591482] __split_vma+0x5af/0x950 [ 30.591832] ? __pfx___split_vma+0x10/0x10 [ 30.592191] ? find_held_lock+0x2c/0x110 [ 30.592553] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.592961] ? lock_is_held_type+0x9f/0x120 [ 30.593402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.593872] ? mtree_range_walk+0x632/0x900 [ 30.594254] ? mas_walk+0x5c7/0x7c0 [ 30.594567] do_vmi_munmap+0x1f1/0x2b0 [ 30.594919] mmap_region+0x1f9/0x2660 [ 30.595262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.595621] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.596085] ? __pfx_lock_acquire+0x10/0x10 [ 30.596448] ? __pfx_mmap_region+0x10/0x10 [ 30.596816] ? security_mmap_addr+0x7d/0xa0 [ 30.597164] ? get_unmapped_area+0x1f5/0x3f0 [ 30.597527] do_mmap+0x854/0xf00 [ 30.597812] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.598121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.598478] ksys_mmap_pgoff+0x3af/0x500 [ 30.598864] do_syscall_64+0x3f/0x90 [ 30.599208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599705] RIP: 0033:0x7f2eeea5cd82 [ 30.600040] 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 [ 30.601503] RSP: 002b:00007ffdccb5bf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.602115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2eeea5cd82 [ 30.602644] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2eede96000 [ 30.603284] RBP: 00007f2eede96000 R08: 0000000000000009 R09: 0000000000001000 [ 30.603916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85114aec0 [ 30.604523] R13: 00007ffdccb5bf20 R14: 00007ffdccb5bf50 R15: 00007ffdccb5c2b0 [ 30.605060] [ 30.605243] [ 30.605417] Allocated by task 213: [ 30.605700] kasan_save_stack+0x22/0x50 [ 30.606055] kasan_set_track+0x25/0x30 [ 30.606399] __kasan_slab_alloc+0x59/0x70 [ 30.606777] kmem_cache_alloc+0x16b/0x370 [ 30.607167] vm_area_dup+0x20/0x160 [ 30.607472] __split_vma+0x170/0x950 [ 30.607811] split_vma+0xc6/0x110 [ 30.608113] mprotect_fixup+0x8d2/0xb30 [ 30.608458] do_mprotect_pkey+0x87e/0xd40 [ 30.608798] __x64_sys_mprotect+0x78/0xc0 [ 30.609141] do_syscall_64+0x3f/0x90 [ 30.609488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.609919] [ 30.610065] Freed by task 213: [ 30.610345] kasan_save_stack+0x22/0x50 [ 30.610691] kasan_set_track+0x25/0x30 [ 30.611017] kasan_save_free_info+0x2b/0x50 [ 30.611372] __kasan_slab_free+0x10a/0x190 [ 30.611737] kmem_cache_free+0x10d/0x4d0 [ 30.612070] rcu_core+0x8c8/0x2860 [ 30.612354] __do_softirq+0x1b7/0x7d4 [ 30.612667] [ 30.612810] Last potentially related work creation: [ 30.613204] kasan_save_stack+0x22/0x50 [ 30.613565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.614009] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.614434] remove_vma+0x139/0x170 [ 30.614734] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.615111] do_vmi_munmap+0x1f1/0x2b0 [ 30.615428] __vm_munmap+0x138/0x3a0 [ 30.615740] __x64_sys_munmap+0x59/0x80 [ 30.616065] do_syscall_64+0x3f/0x90 [ 30.616387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.616818] [ 30.616960] The buggy address belongs to the object at ffff888014706910 [ 30.616960] which belongs to the cache vm_area_struct of size 168 [ 30.617964] The buggy address is located 88 bytes inside of [ 30.617964] freed 168-byte region [ffff888014706910, ffff8880147069b8) [ 30.618937] [ 30.619080] The buggy address belongs to the physical page: [ 30.619510] page:0000000093584efd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14706 [ 30.620188] memcg:ffff888016a37b01 [ 30.620453] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.620897] page_type: 0xffffffff() [ 30.621218] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.621873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a37b01 [ 30.622481] page dumped because: kasan: bad access detected [ 30.622928] [ 30.623074] Memory state around the buggy address: [ 30.623481] ffff888014706800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.624059] ffff888014706880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.624643] >ffff888014706900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.625215] ^ [ 30.625775] ffff888014706980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.626320] ffff888014706a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.626886] ================================================================== [ 30.627662] Disabling lock debugging due to kernel taint [ 32.502675] BUG: Bad rss-counter state mm:000000009cd83e72 type:MM_FILEPAGES val:33 [ 32.503837] BUG: Bad rss-counter state mm:000000009cd83e72 type:MM_ANONPAGES val:22 [ 32.878790] BUG: Bad rss-counter state mm:00000000b3d0f243 type:MM_FILEPAGES val:33 [ 32.879503] BUG: Bad rss-counter state mm:00000000b3d0f243 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32716' (ECDSA) to the list of known hosts. 2023/06/21 08:58:32 fuzzer started 2023/06/21 08:58:32 dialing manager at localhost:36067 2023/06/21 08:58:32 checking machine... 2023/06/21 08:58:32 checking revisions... [ 33.425947] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:58:32 testing simple program... [ 33.458504] cgroup: Unknown subsys name 'net' [ 33.509124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:58:32 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86607900 RCX=ffffffff813a0b19 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e524670 RIP=ffffffff814c026c RFL=00000206 [-----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 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=00007ffcdca6c288 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=00007fc982fe2510000055677ebd1790 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=1ffff11001ed9fd0 RBX=00007fa330f54fff RCX=0000000000000000 RDX=ffff8880160951c0 RSI=ffffffff844b5b2f RDI=0000000000000000 RBP=0000000000000070 RSP=ffff88800f6cfb10 R8 =0000000000000000 R9 =000000000000000e R10=000000000000000e R11=0000000000000000 R12=000000000000000e R13=ffff88800ea4ba00 R14=dffffc0000000000 R15=ffff88800f6cfe70 RIP=ffffffff844b5b41 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 00007fa330f77900 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=00007fa330f56020 CR3=000000000e7b8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000