syzkaller login: [ 29.720275] BUG: Bad rss-counter state mm:000000001ba61df9 type:MM_FILEPAGES val:33 [ 29.721885] BUG: Bad rss-counter state mm:000000001ba61df9 type:MM_ANONPAGES val:22 [ 29.891169] ================================================================== [ 29.892292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.893430] Read of size 8 at addr ffff888017111c20 by task sshd/220 [ 29.894422] [ 29.894642] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.895516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.896524] Call Trace: [ 29.896843] [ 29.897143] dump_stack_lvl+0x91/0xf0 [ 29.897641] print_report+0xcc/0x620 [ 29.898157] ? __virt_addr_valid+0x102/0x340 [ 29.898708] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.899371] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.899994] kasan_report+0xbe/0xf0 [ 29.900486] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.901123] vma_interval_tree_remove+0xc75/0xec0 [ 29.901735] vma_prepare+0xc54/0x11a0 [ 29.902242] __split_vma+0x5af/0x950 [ 29.902731] ? __pfx___split_vma+0x10/0x10 [ 29.903293] ? find_held_lock+0x2c/0x110 [ 29.903819] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.904415] ? lock_is_held_type+0x9f/0x120 [ 29.904957] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.905579] ? mtree_range_walk+0x632/0x900 [ 29.906160] ? mas_walk+0x5c7/0x7c0 [ 29.906631] do_vmi_munmap+0x1f1/0x2b0 [ 29.907139] mmap_region+0x1f9/0x2660 [ 29.907634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.908163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.908891] ? __pfx_lock_acquire+0x10/0x10 [ 29.909446] ? __pfx_mmap_region+0x10/0x10 [ 29.909995] ? security_mmap_addr+0x7d/0xa0 [ 29.910532] ? get_unmapped_area+0x1f5/0x3f0 [ 29.911104] do_mmap+0x854/0xf00 [ 29.911563] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.912059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.912636] ksys_mmap_pgoff+0x3af/0x500 [ 29.913156] do_syscall_64+0x3f/0x90 [ 29.913638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.914315] RIP: 0033:0x7f7d20bfdd82 [ 29.914784] 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 [ 29.916988] RSP: 002b:00007ffc554f7cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.917909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d20bfdd82 [ 29.918785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d20037000 [ 29.919745] RBP: 00007f7d20037000 R08: 0000000000000009 R09: 0000000000001000 [ 29.920609] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a010596d90 [ 29.921468] R13: 00007ffc554f7cf0 R14: 00007ffc554f7d20 R15: 00007ffc554f8080 [ 29.922340] [ 29.922633] [ 29.922848] Allocated by task 212: [ 29.923303] kasan_save_stack+0x22/0x50 [ 29.923809] kasan_set_track+0x25/0x30 [ 29.924317] __kasan_slab_alloc+0x59/0x70 [ 29.924839] kmem_cache_alloc+0x16b/0x370 [ 29.925367] vm_area_dup+0x20/0x160 [ 29.925824] __split_vma+0x170/0x950 [ 29.926307] split_vma+0xc6/0x110 [ 29.926747] mprotect_fixup+0x8d2/0xb30 [ 29.927293] do_mprotect_pkey+0x87e/0xd40 [ 29.927810] __x64_sys_mprotect+0x78/0xc0 [ 29.928351] do_syscall_64+0x3f/0x90 [ 29.928825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.929490] [ 29.929702] Freed by task 212: [ 29.930111] kasan_save_stack+0x22/0x50 [ 29.930617] kasan_set_track+0x25/0x30 [ 29.931128] kasan_save_free_info+0x2b/0x50 [ 29.931744] __kasan_slab_free+0x10a/0x190 [ 29.932304] kmem_cache_free+0x10d/0x4d0 [ 29.932818] rcu_core+0x8c8/0x2860 [ 29.933281] __do_softirq+0x1b7/0x7d4 [ 29.933763] [ 29.933984] Last potentially related work creation: [ 29.934591] kasan_save_stack+0x22/0x50 [ 29.935159] __kasan_record_aux_stack+0x8e/0xa0 [ 29.935778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.936452] remove_vma+0x139/0x170 [ 29.936921] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.937495] do_vmi_munmap+0x1f1/0x2b0 [ 29.937990] __vm_munmap+0x138/0x3a0 [ 29.938480] __x64_sys_munmap+0x59/0x80 [ 29.938992] do_syscall_64+0x3f/0x90 [ 29.939513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.940166] [ 29.940385] The buggy address belongs to the object at ffff888017111bc8 [ 29.940385] which belongs to the cache vm_area_struct of size 168 [ 29.941886] The buggy address is located 88 bytes inside of [ 29.941886] freed 168-byte region [ffff888017111bc8, ffff888017111c70) [ 29.943328] [ 29.943553] The buggy address belongs to the physical page: [ 29.944217] page:00000000b2542d38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17111 [ 29.945338] memcg:ffff88800c594401 [ 29.945772] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.946505] page_type: 0xffffffff() [ 29.946959] raw: 0100000000000200 ffff88800879fc80 ffffea0000664000 0000000000000005 [ 29.947940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c594401 [ 29.948873] page dumped because: kasan: bad access detected [ 29.949544] [ 29.949758] Memory state around the buggy address: [ 29.950355] ffff888017111b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.951267] ffff888017111b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.952147] >ffff888017111c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.953009] ^ [ 29.953553] ffff888017111c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.954426] ffff888017111d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.955312] ================================================================== [ 29.956362] Disabling lock debugging due to kernel taint [ 31.938836] BUG: Bad rss-counter state mm:00000000d8dd67d1 type:MM_FILEPAGES val:33 [ 31.939826] BUG: Bad rss-counter state mm:00000000d8dd67d1 type:MM_ANONPAGES val:22 [ 32.384059] BUG: Bad rss-counter state mm:00000000b82d5e1b type:MM_FILEPAGES val:33 [ 32.385225] BUG: Bad rss-counter state mm:00000000b82d5e1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56590' (ECDSA) to the list of known hosts. 2023/06/19 20:09:47 fuzzer started 2023/06/19 20:09:47 dialing manager at localhost:44161 2023/06/19 20:09:47 checking machine... 2023/06/19 20:09:47 checking revisions... [ 33.212843] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:09:47 testing simple program... [ 33.265592] cgroup: Unknown subsys name 'net' [ 33.315912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:09:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016003680 R15=ffff88800e2451b0 RIP=ffffffff8113038e 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 00007f3aa2b78900 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=00007f3aa312d650 CR3=000000000f2d2000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888008d751c0 RCX=ffffffff8123b0c9 RDX=ffffed10011aea39 RSI=0000000000000008 RDI=ffff888008d751c0 RBP=0000000000000001 RSP=ffff88806cf09730 R8 =0000000000000001 R9 =ffffed10011aea38 R10=ffff888008d751c7 R11=0000000000000000 R12=1ffff1100d9e12e6 R13=ffff88806cf39ed8 R14=ffffffff852beb10 R15=ffff88806cf39500 RIP=ffffffff8123b0cd RFL=00000002 [-------] 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=00007f20e142b8e0 CR3=00000000141ea000 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=bbb8177611e366a1a440210a2f93a186 XMM02=ec2efd57dc4c00df000000000011db88 XMM03=8cec0d4d9e0c22dd000000000011dc58 XMM04=02c1d12b42de3f9500000000000ae988 XMM05=9a7da7ba003c6a4500000000001354b8 XMM06=4fda316b135da52b00000000001342a8 XMM07=fb795ef6d65770560000000000124178 XMM08=2c67c8bc2e329bc3000000000011dbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000