syzkaller login: [ 30.347379] BUG: Bad rss-counter state mm:00000000b80f54ed type:MM_FILEPAGES val:33 [ 30.348891] BUG: Bad rss-counter state mm:00000000b80f54ed type:MM_ANONPAGES val:22 [ 30.486762] ================================================================== [ 30.487502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.488229] Read of size 8 at addr ffff888016d88ed8 by task sshd/220 [ 30.488821] [ 30.489062] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.489742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.490516] Call Trace: [ 30.490772] [ 30.490997] dump_stack_lvl+0x91/0xf0 [ 30.491403] print_report+0xcc/0x620 [ 30.491781] ? __virt_addr_valid+0x102/0x340 [ 30.492212] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.492687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.493162] kasan_report+0xbe/0xf0 [ 30.493526] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494028] vma_interval_tree_remove+0xc75/0xec0 [ 30.494502] vma_prepare+0xc54/0x11a0 [ 30.494872] __split_vma+0x5af/0x950 [ 30.495237] ? __pfx___split_vma+0x10/0x10 [ 30.495648] ? find_held_lock+0x2c/0x110 [ 30.496061] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.496504] ? lock_is_held_type+0x9f/0x120 [ 30.496932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.497405] ? mtree_range_walk+0x632/0x900 [ 30.497846] ? mas_walk+0x5c7/0x7c0 [ 30.498217] do_vmi_munmap+0x1f1/0x2b0 [ 30.498604] mmap_region+0x1f9/0x2660 [ 30.498987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.499384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.499949] ? __pfx_lock_acquire+0x10/0x10 [ 30.500369] ? __pfx_mmap_region+0x10/0x10 [ 30.500789] ? security_mmap_addr+0x7d/0xa0 [ 30.501202] ? get_unmapped_area+0x1f5/0x3f0 [ 30.501635] do_mmap+0x854/0xf00 [ 30.501979] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.502371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.502812] ksys_mmap_pgoff+0x3af/0x500 [ 30.503209] do_syscall_64+0x3f/0x90 [ 30.503583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.504087] RIP: 0033:0x7f6fc51b0d82 [ 30.504446] 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 [ 30.506136] RSP: 002b:00007ffc07db4d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.506856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6fc51b0d82 [ 30.507520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fc45ea000 [ 30.508181] RBP: 00007f6fc45ea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.508847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558602f26ec0 [ 30.509512] R13: 00007ffc07db4d20 R14: 00007ffc07db4d50 R15: 00007ffc07db50b0 [ 30.510194] [ 30.510421] [ 30.510592] Allocated by task 213: [ 30.510928] kasan_save_stack+0x22/0x50 [ 30.511322] kasan_set_track+0x25/0x30 [ 30.511706] __kasan_slab_alloc+0x59/0x70 [ 30.512121] kmem_cache_alloc+0x16b/0x370 [ 30.512524] vm_area_dup+0x20/0x160 [ 30.512887] __split_vma+0x170/0x950 [ 30.513248] split_vma+0xc6/0x110 [ 30.513594] mprotect_fixup+0x8d2/0xb30 [ 30.514001] do_mprotect_pkey+0x87e/0xd40 [ 30.514406] __x64_sys_mprotect+0x78/0xc0 [ 30.514815] do_syscall_64+0x3f/0x90 [ 30.515181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515685] [ 30.515852] Freed by task 13: [ 30.516145] kasan_save_stack+0x22/0x50 [ 30.516537] kasan_set_track+0x25/0x30 [ 30.516921] kasan_save_free_info+0x2b/0x50 [ 30.517336] __kasan_slab_free+0x10a/0x190 [ 30.517753] kmem_cache_free+0x10d/0x4d0 [ 30.518156] rcu_core+0x8c8/0x2860 [ 30.518503] __do_softirq+0x1b7/0x7d4 [ 30.518876] [ 30.519045] Last potentially related work creation: [ 30.519503] kasan_save_stack+0x22/0x50 [ 30.519894] __kasan_record_aux_stack+0x8e/0xa0 [ 30.520340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.520841] remove_vma+0x139/0x170 [ 30.521187] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.521623] do_vmi_munmap+0x1f1/0x2b0 [ 30.522008] __vm_munmap+0x138/0x3a0 [ 30.522371] __x64_sys_munmap+0x59/0x80 [ 30.522759] do_syscall_64+0x3f/0x90 [ 30.523136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.523635] [ 30.523803] The buggy address belongs to the object at ffff888016d88e80 [ 30.523803] which belongs to the cache vm_area_struct of size 168 [ 30.524971] The buggy address is located 88 bytes inside of [ 30.524971] freed 168-byte region [ffff888016d88e80, ffff888016d88f28) [ 30.526076] [ 30.526245] The buggy address belongs to the physical page: [ 30.526761] page:000000000e8b9358 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d88 [ 30.527616] memcg:ffff88800e3ea501 [ 30.527950] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.528457] page_type: 0xffffffff() [ 30.528806] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b4000 000000000000000c [ 30.529524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ea501 [ 30.530248] page dumped because: kasan: bad access detected [ 30.530764] [ 30.530933] Memory state around the buggy address: [ 30.531390] ffff888016d88d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.532054] ffff888016d88e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.532718] >ffff888016d88e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.533387] ^ [ 30.533962] ffff888016d88f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.534625] ffff888016d88f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.535289] ================================================================== [ 30.536033] Disabling lock debugging due to kernel taint [ 32.606710] BUG: Bad rss-counter state mm:00000000aa28553a type:MM_FILEPAGES val:33 [ 32.607760] BUG: Bad rss-counter state mm:00000000aa28553a type:MM_ANONPAGES val:22 [ 33.139653] BUG: Bad rss-counter state mm:00000000c1ebd5e3 type:MM_FILEPAGES val:33 [ 33.140828] BUG: Bad rss-counter state mm:00000000c1ebd5e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22519' (ECDSA) to the list of known hosts. 2023/06/21 02:33:22 fuzzer started 2023/06/21 02:33:22 dialing manager at localhost:36067 2023/06/21 02:33:22 checking machine... 2023/06/21 02:33:22 checking revisions... [ 33.839293] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:33:22 testing simple program... [ 33.891792] cgroup: Unknown subsys name 'net' [ 33.960216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:22 Registers: info registers vcpu 0 RAX=1ffff11001bc418f RBX=ffff88800de20c48 RCX=1ffff11001b8611e RDX=dffffc0000000000 RSI=ffff88801010de00 RDI=ffff88800de20c78 RBP=ffff88800dc308c0 RSP=ffff8880146475e8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801010dc00 R13=0000000000000000 R14=ffff88800ef213d8 R15=ffff88800ef21390 RIP=ffffffff8184767e 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 00007f0f743a3900 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=00007f8ef481e650 CR3=0000000008c7c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a60e024d55675ad200000000000ae988 XMM05=2e516bb19e3f62ff0000000000133170 XMM06=4fda316b135da52b0000000000131f60 XMM07=fb795ef6d65770560000000000122230 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fffd00faf08 CR3=000000000cbae000 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=2031323a33333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000