syzkaller login: [ 23.693460] BUG: Bad rss-counter state mm:000000007dffd074 type:MM_FILEPAGES val:33 [ 23.694756] BUG: Bad rss-counter state mm:000000007dffd074 type:MM_ANONPAGES val:22 [ 23.852167] ================================================================== [ 23.853175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.854203] Read of size 8 at addr ffff88800e184b38 by task sshd/219 [ 23.855050] [ 23.855396] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.856360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.857431] Call Trace: [ 23.857804] <TASK> [ 23.858121] dump_stack_lvl+0x91/0xf0 [ 23.858658] print_report+0xcc/0x620 [ 23.859188] ? __virt_addr_valid+0x102/0x340 [ 23.859806] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.860493] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.861173] kasan_report+0xbe/0xf0 [ 23.861688] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.862359] vma_interval_tree_remove+0xc75/0xec0 [ 23.863019] vma_prepare+0xc54/0x11a0 [ 23.863548] __split_vma+0x5af/0x950 [ 23.864062] ? __pfx___split_vma+0x10/0x10 [ 23.864639] ? find_held_lock+0x2c/0x110 [ 23.865211] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.865826] ? lock_is_held_type+0x9f/0x120 [ 23.866419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.867087] ? mtree_range_walk+0x632/0x900 [ 23.867714] ? mas_walk+0x5c7/0x7c0 [ 23.868232] do_vmi_munmap+0x1f1/0x2b0 [ 23.868770] mmap_region+0x1f9/0x2660 [ 23.869306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.869866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.870645] ? __pfx_lock_acquire+0x10/0x10 [ 23.871230] ? __pfx_mmap_region+0x10/0x10 [ 23.871818] ? security_mmap_addr+0x7d/0xa0 [ 23.872403] ? get_unmapped_area+0x1f5/0x3f0 [ 23.873007] do_mmap+0x854/0xf00 [ 23.873493] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.874038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.874650] ksys_mmap_pgoff+0x3af/0x500 [ 23.875209] do_syscall_64+0x3f/0x90 [ 23.875750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.876460] RIP: 0033:0x7ff60a790d82 [ 23.876955] 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 [ 23.879248] RSP: 002b:00007ffea0c248a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.880220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff60a790d82 [ 23.881121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff609bca000 [ 23.882021] RBP: 00007ff609bca000 R08: 0000000000000009 R09: 0000000000001000 [ 23.882916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8f3f18f70 [ 23.883826] R13: 00007ffea0c248c0 R14: 00007ffea0c248f0 R15: 00007ffea0c24c50 [ 23.884736] </TASK> [ 23.885046] [ 23.885275] Allocated by task 212: [ 23.885728] kasan_save_stack+0x22/0x50 [ 23.886266] kasan_set_track+0x25/0x30 [ 23.886789] __kasan_slab_alloc+0x59/0x70 [ 23.887347] kmem_cache_alloc+0x16b/0x370 [ 23.887906] vm_area_dup+0x20/0x160 [ 23.888387] __split_vma+0x170/0x950 [ 23.888881] split_vma+0xc6/0x110 [ 23.889351] mprotect_fixup+0x8d2/0xb30 [ 23.889889] do_mprotect_pkey+0x87e/0xd40 [ 23.890440] __x64_sys_mprotect+0x78/0xc0 [ 23.890994] do_syscall_64+0x3f/0x90 [ 23.891498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.892218] [ 23.892447] Freed by task 212: [ 23.892867] kasan_save_stack+0x22/0x50 [ 23.893405] kasan_set_track+0x25/0x30 [ 23.893929] kasan_save_free_info+0x2b/0x50 [ 23.894501] __kasan_slab_free+0x10a/0x190 [ 23.895070] kmem_cache_free+0x10d/0x4d0 [ 23.895619] rcu_core+0x8c8/0x2860 [ 23.896090] __do_softirq+0x1b7/0x7d4 [ 23.896676] [ 23.896904] Last potentially related work creation: [ 23.897525] kasan_save_stack+0x22/0x50 [ 23.898060] __kasan_record_aux_stack+0x8e/0xa0 [ 23.898670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.899354] remove_vma+0x139/0x170 [ 23.899848] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.900440] do_vmi_munmap+0x1f1/0x2b0 [ 23.900957] __vm_munmap+0x138/0x3a0 [ 23.901456] __x64_sys_munmap+0x59/0x80 [ 23.901992] do_syscall_64+0x3f/0x90 [ 23.902500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903188] [ 23.903418] Second to last potentially related work creation: [ 23.904150] kasan_save_stack+0x22/0x50 [ 23.904687] __kasan_record_aux_stack+0x8e/0xa0 [ 23.905298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.905979] remove_vma+0x139/0x170 [ 23.906461] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.907054] do_vmi_munmap+0x1f1/0x2b0 [ 23.907576] __vm_munmap+0x138/0x3a0 [ 23.908072] elf_map+0x26f/0x310 [ 23.908551] load_elf_binary+0x3417/0x5030 [ 23.909118] bprm_execve+0x803/0x1940 [ 23.909619] do_execveat_common+0x734/0x8e0 [ 23.910177] __x64_sys_execve+0x93/0xc0 [ 23.910693] do_syscall_64+0x3f/0x90 [ 23.911200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.911895] [ 23.912125] The buggy address belongs to the object at ffff88800e184ae0 [ 23.912125] which belongs to the cache vm_area_struct of size 168 [ 23.913669] The buggy address is located 88 bytes inside of [ 23.913669] freed 168-byte region [ffff88800e184ae0, ffff88800e184b88) [ 23.915152] [ 23.915384] The buggy address belongs to the physical page: [ 23.916087] page:0000000009b45d0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe184 [ 23.917233] memcg:ffff88800c4c1501 [ 23.917689] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.918428] page_type: 0xffffffff() [ 23.918905] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318440 dead000000000007 [ 23.919892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4c1501 [ 23.920856] page dumped because: kasan: bad access detected [ 23.921558] [ 23.921786] Memory state around the buggy address: [ 23.922402] ffff88800e184a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.923310] ffff88800e184a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.924235] >ffff88800e184b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.925271] ^ [ 23.925918] ffff88800e184b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.926816] ffff88800e184c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.927744] ================================================================== [ 23.928803] Disabling lock debugging due to kernel taint [ 25.923110] BUG: Bad rss-counter state mm:000000000a7a32e4 type:MM_FILEPAGES val:33 [ 25.924279] BUG: Bad rss-counter state mm:000000000a7a32e4 type:MM_ANONPAGES val:22 [ 26.501595] BUG: Bad rss-counter state mm:0000000053eae0d0 type:MM_FILEPAGES val:33 [ 26.502918] BUG: Bad rss-counter state mm:0000000053eae0d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11446' (ECDSA) to the list of known hosts. 2023/06/20 15:44:58 fuzzer started 2023/06/20 15:44:59 dialing manager at localhost:36067 2023/06/20 15:44:59 checking machine... 2023/06/20 15:44:59 checking revisions... [ 27.156336] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:59 testing simple program... [ 27.214883] cgroup: Unknown subsys name 'net' [ 27.275524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:58 Registers: info registers vcpu 0 RAX=000000000000000c RBX=0000556e9faaeed0 RCX=0000000000000013 RDX=0000000000000090 RSI=000000000000000a RDI=0000556e9fabdd80 RBP=00007ffc6021a800 RSP=00007ffc6021a798 R8 =0000556e9fabdd6d R9 =00007f3985ba3be0 R10=000000000000006f R11=0000000000000246 R12=00007f39855f1900 R13=00007ffc6021a808 R14=0000000000000123 R15=0000000000000000 RIP=00007f3985b40bc4 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f39855f1900 00000000 00000000 GS =0000 0000000000000000 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=00007f3985ba6650 CR3=000000000e756000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00ff00ff000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=744f20202e30323630206f74204d5245 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff88806cf09df0 RDI=ffffffff81809add RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff8880158fb680 R15=ffff888016dcc200 RIP=ffffffff811303b2 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 00007f074f033700 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=00007f76b67d8000 CR3=00000000102ae000 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=34343a3531203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038353a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383637 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000