syzkaller login: [ 31.734161] BUG: Bad rss-counter state mm:00000000b4d79d37 type:MM_FILEPAGES val:33 [ 31.735153] BUG: Bad rss-counter state mm:00000000b4d79d37 type:MM_ANONPAGES val:22 [ 31.897559] ================================================================== [ 31.898475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.899432] Read of size 8 at addr ffff88800f706a50 by task sshd/219 [ 31.900199] [ 31.900418] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.901275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.902256] Call Trace: [ 31.902584] [ 31.902868] dump_stack_lvl+0x91/0xf0 [ 31.903365] print_report+0xcc/0x620 [ 31.903852] ? __virt_addr_valid+0x102/0x340 [ 31.904407] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.905026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.905654] kasan_report+0xbe/0xf0 [ 31.906129] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.906749] vma_interval_tree_remove+0xc75/0xec0 [ 31.907374] vma_prepare+0xc54/0x11a0 [ 31.907849] __split_vma+0x5af/0x950 [ 31.908318] ? __pfx___split_vma+0x10/0x10 [ 31.908847] ? find_held_lock+0x2c/0x110 [ 31.909370] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.909939] ? lock_is_held_type+0x9f/0x120 [ 31.910480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.911084] ? mtree_range_walk+0x632/0x900 [ 31.911648] ? mas_walk+0x5c7/0x7c0 [ 31.912118] do_vmi_munmap+0x1f1/0x2b0 [ 31.912607] mmap_region+0x1f9/0x2660 [ 31.913085] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.913593] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.914293] ? __pfx_lock_acquire+0x10/0x10 [ 31.914824] ? __pfx_mmap_region+0x10/0x10 [ 31.915365] ? security_mmap_addr+0x7d/0xa0 [ 31.915900] ? get_unmapped_area+0x1f5/0x3f0 [ 31.916451] do_mmap+0x854/0xf00 [ 31.916888] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.917381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.917938] ksys_mmap_pgoff+0x3af/0x500 [ 31.918439] do_syscall_64+0x3f/0x90 [ 31.918917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.919565] RIP: 0033:0x7f243f91ed82 [ 31.920016] 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 [ 31.922132] RSP: 002b:00007ffc5c2cbd98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.923040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f243f91ed82 [ 31.923894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f243ed58000 [ 31.924749] RBP: 00007f243ed58000 R08: 0000000000000009 R09: 0000000000001000 [ 31.925597] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d09401b20 [ 31.926450] R13: 00007ffc5c2cbdb0 R14: 00007ffc5c2cbde0 R15: 00007ffc5c2cc140 [ 31.927344] [ 31.927636] [ 31.927854] Allocated by task 212: [ 31.928278] kasan_save_stack+0x22/0x50 [ 31.928786] kasan_set_track+0x25/0x30 [ 31.929283] __kasan_slab_alloc+0x59/0x70 [ 31.929812] kmem_cache_alloc+0x16b/0x370 [ 31.930322] vm_area_dup+0x20/0x160 [ 31.930772] __split_vma+0x170/0x950 [ 31.931229] split_vma+0xc6/0x110 [ 31.931688] mprotect_fixup+0x8d2/0xb30 [ 31.932196] do_mprotect_pkey+0x87e/0xd40 [ 31.932712] __x64_sys_mprotect+0x78/0xc0 [ 31.933248] do_syscall_64+0x3f/0x90 [ 31.933722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.934361] [ 31.934586] Freed by task 19: [ 31.934970] kasan_save_stack+0x22/0x50 [ 31.935502] kasan_set_track+0x25/0x30 [ 31.935998] kasan_save_free_info+0x2b/0x50 [ 31.936528] __kasan_slab_free+0x10a/0x190 [ 31.937059] kmem_cache_free+0x10d/0x4d0 [ 31.937575] rcu_core+0x8c8/0x2860 [ 31.938017] __do_softirq+0x1b7/0x7d4 [ 31.938490] [ 31.938707] Last potentially related work creation: [ 31.939300] kasan_save_stack+0x22/0x50 [ 31.939809] __kasan_record_aux_stack+0x8e/0xa0 [ 31.940378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.941021] remove_vma+0x139/0x170 [ 31.941472] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.942028] do_vmi_munmap+0x1f1/0x2b0 [ 31.942508] __vm_munmap+0x138/0x3a0 [ 31.942970] __x64_sys_munmap+0x59/0x80 [ 31.943474] do_syscall_64+0x3f/0x90 [ 31.943946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.944578] [ 31.944790] The buggy address belongs to the object at ffff88800f7069f8 [ 31.944790] which belongs to the cache vm_area_struct of size 168 [ 31.946240] The buggy address is located 88 bytes inside of [ 31.946240] freed 168-byte region [ffff88800f7069f8, ffff88800f706aa0) [ 31.947655] [ 31.947870] The buggy address belongs to the physical page: [ 31.948525] page:00000000c5fab001 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf706 [ 31.949611] memcg:ffff88800f795901 [ 31.950037] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.950684] page_type: 0xffffffff() [ 31.951128] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.952039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f795901 [ 31.952941] page dumped because: kasan: bad access detected [ 31.953596] [ 31.953809] Memory state around the buggy address: [ 31.954389] ffff88800f706900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.955236] ffff88800f706980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.956115] >ffff88800f706a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.956961] ^ [ 31.957656] ffff88800f706a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.958507] ffff88800f706b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.959357] ================================================================== [ 31.960598] Disabling lock debugging due to kernel taint [ 33.809520] BUG: Bad rss-counter state mm:00000000888a5f21 type:MM_FILEPAGES val:33 [ 33.810541] BUG: Bad rss-counter state mm:00000000888a5f21 type:MM_ANONPAGES val:22 [ 34.265384] BUG: Bad rss-counter state mm:00000000f01ed581 type:MM_FILEPAGES val:33 [ 34.266652] BUG: Bad rss-counter state mm:00000000f01ed581 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61242' (ECDSA) to the list of known hosts. 2023/06/19 23:22:55 fuzzer started 2023/06/19 23:22:55 dialing manager at localhost:44161 2023/06/19 23:22:55 checking machine... 2023/06/19 23:22:55 checking revisions... [ 34.930163] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:22:55 testing simple program... [ 34.980803] cgroup: Unknown subsys name 'net' [ 35.023663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:22:53 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=0000000000482cc0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=000000000000be40 RBP=ffff8880146ff698 RSP=ffff8880146ff640 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f140 R13=0000000000482cc0 R14=ffff88800d94c380 R15=0000000000000000 RIP=ffffffff8180af40 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 00007f1f23d69900 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=00007f1f231b2050 CR3=000000000edd0000 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=393b37116516288d00000000000ae988 XMM05=3805039f38e191e60000000000135030 XMM06=806171799158d96700000000001340d0 XMM07=fb795ef6d65770560000000000124640 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11003198478 RSI=ffffffff8363758c RDI=ffff888018cc23c0 RBP=ffff888017ebfe10 RSP=ffff888017ebfcd0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ffd709c59fc R14=000000000000000c R15=0000000000000000 RIP=ffffffff814c07e0 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 00007ff040746900 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=00007ffd709c6000 CR3=000000001479e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000