syzkaller login: [ 31.008971] BUG: Bad rss-counter state mm:000000000cbf17d4 type:MM_FILEPAGES val:33 [ 31.010685] BUG: Bad rss-counter state mm:000000000cbf17d4 type:MM_ANONPAGES val:22 [ 31.166550] ================================================================== [ 31.167539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168551] Read of size 8 at addr ffff88800ef6a5c8 by task sshd/219 [ 31.169378] [ 31.169726] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.170644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171705] Call Trace: [ 31.172072] [ 31.172378] dump_stack_lvl+0x91/0xf0 [ 31.172909] print_report+0xcc/0x620 [ 31.173435] ? __virt_addr_valid+0x102/0x340 [ 31.174028] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175366] kasan_report+0xbe/0xf0 [ 31.175895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176583] vma_interval_tree_remove+0xc75/0xec0 [ 31.177246] vma_prepare+0xc54/0x11a0 [ 31.177775] __split_vma+0x5af/0x950 [ 31.178296] ? __pfx___split_vma+0x10/0x10 [ 31.178881] ? find_held_lock+0x2c/0x110 [ 31.179467] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.180092] ? lock_is_held_type+0x9f/0x120 [ 31.180681] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.181356] ? mtree_range_walk+0x632/0x900 [ 31.181968] ? mas_walk+0x5c7/0x7c0 [ 31.182489] do_vmi_munmap+0x1f1/0x2b0 [ 31.183033] mmap_region+0x1f9/0x2660 [ 31.183592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.184161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.184950] ? __pfx_lock_acquire+0x10/0x10 [ 31.185539] ? __pfx_mmap_region+0x10/0x10 [ 31.186124] ? security_mmap_addr+0x7d/0xa0 [ 31.186706] ? get_unmapped_area+0x1f5/0x3f0 [ 31.187314] do_mmap+0x854/0xf00 [ 31.187812] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.188353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.188973] ksys_mmap_pgoff+0x3af/0x500 [ 31.189534] do_syscall_64+0x3f/0x90 [ 31.190064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190784] RIP: 0033:0x7f087543ed82 [ 31.191278] 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 [ 31.193663] RSP: 002b:00007ffffc9fd9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.194661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f087543ed82 [ 31.195604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0874878000 [ 31.196551] RBP: 00007f0874878000 R08: 0000000000000009 R09: 0000000000001000 [ 31.197486] R10: 0000000000000812 R11: 0000000000000206 R12: 000055857b253ec0 [ 31.198409] R13: 00007ffffc9fda10 R14: 00007ffffc9fda40 R15: 00007ffffc9fdda0 [ 31.199369] [ 31.199692] [ 31.199928] Allocated by task 212: [ 31.200396] kasan_save_stack+0x22/0x50 [ 31.200952] kasan_set_track+0x25/0x30 [ 31.201497] __kasan_slab_alloc+0x59/0x70 [ 31.202068] kmem_cache_alloc+0x16b/0x370 [ 31.202630] vm_area_dup+0x20/0x160 [ 31.203134] __split_vma+0x170/0x950 [ 31.203658] split_vma+0xc6/0x110 [ 31.204143] mprotect_fixup+0x8d2/0xb30 [ 31.204699] do_mprotect_pkey+0x87e/0xd40 [ 31.205273] __x64_sys_mprotect+0x78/0xc0 [ 31.205849] do_syscall_64+0x3f/0x90 [ 31.206370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207081] [ 31.207318] Freed by task 212: [ 31.207759] kasan_save_stack+0x22/0x50 [ 31.208309] kasan_set_track+0x25/0x30 [ 31.208850] kasan_save_free_info+0x2b/0x50 [ 31.209433] __kasan_slab_free+0x10a/0x190 [ 31.210011] kmem_cache_free+0x10d/0x4d0 [ 31.210644] rcu_core+0x8c8/0x2860 [ 31.211140] __do_softirq+0x1b7/0x7d4 [ 31.211689] [ 31.211925] Last potentially related work creation: [ 31.212567] kasan_save_stack+0x22/0x50 [ 31.213117] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.214455] remove_vma+0x139/0x170 [ 31.214954] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.215577] do_vmi_munmap+0x1f1/0x2b0 [ 31.216111] __vm_munmap+0x138/0x3a0 [ 31.216621] __x64_sys_munmap+0x59/0x80 [ 31.217167] do_syscall_64+0x3f/0x90 [ 31.217690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218403] [ 31.218639] The buggy address belongs to the object at ffff88800ef6a570 [ 31.218639] which belongs to the cache vm_area_struct of size 168 [ 31.220269] The buggy address is located 88 bytes inside of [ 31.220269] freed 168-byte region [ffff88800ef6a570, ffff88800ef6a618) [ 31.221833] [ 31.222068] The buggy address belongs to the physical page: [ 31.222797] page:000000003b064d35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef6a [ 31.224012] memcg:ffff88800e95dc01 [ 31.224478] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.225248] page_type: 0xffffffff() [ 31.225740] raw: 0100000000000200 ffff8880087a0c80 ffffea000025f880 dead000000000005 [ 31.226747] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e95dc01 [ 31.227764] page dumped because: kasan: bad access detected [ 31.228493] [ 31.228728] Memory state around the buggy address: [ 31.229369] ffff88800ef6a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.230319] ffff88800ef6a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.231265] >ffff88800ef6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232223] ^ [ 31.232951] ffff88800ef6a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.233899] ffff88800ef6a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.234845] ================================================================== [ 31.235964] Disabling lock debugging due to kernel taint [ 33.037354] BUG: Bad rss-counter state mm:00000000cbce6832 type:MM_FILEPAGES val:33 [ 33.038559] BUG: Bad rss-counter state mm:00000000cbce6832 type:MM_ANONPAGES val:22 [ 33.379883] BUG: Bad rss-counter state mm:000000002c06922b type:MM_FILEPAGES val:33 [ 33.381016] BUG: Bad rss-counter state mm:000000002c06922b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23806' (ECDSA) to the list of known hosts. 2023/06/20 19:09:17 fuzzer started 2023/06/20 19:09:17 dialing manager at localhost:36067 2023/06/20 19:09:17 checking machine... 2023/06/20 19:09:17 checking revisions... [ 34.043442] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:09:17 testing simple program... [ 34.085953] cgroup: Unknown subsys name 'net' [ 34.131115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:09:16 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=00007f56f5044a20 CR3=000000000d644000 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=edeb99c879e0b686b846cdf2b39b4f9d XMM02=000000000011b4a0ec2efd57dc4c00df XMM03=0000000000121e60c089641b6fb52c8c XMM04=a1e6f3b40a425cd600000000000ae988 XMM05=19e9129bd510f2350000000000131970 XMM06=832d1ee4e477363c0000000000130b48 XMM07=e042d86d42eb936e0000000000122138 XMM08=c089641b6fb52c8c000000000011b500 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801caa2e00 RCX=0000000000000000 RDX=1ffffffff0ad9dc4 RSI=0000000000000100 RDI=ffff888014626604 RBP=ffff8880084c6140 RSP=ffff8880182173d8 R8 =ffff88801caa2e10 R9 =0000000000000000 R10=0000000000000009 R11=00000000000b6a61 R12=ffff88801caa2e10 R13=dffffc0000000000 R14=0000000000002800 R15=0000000000000002 RIP=ffffffff8180a5f9 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 00007f7f7ab65900 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=00007f7f7ab2a008 CR3=000000000cb0e000 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