syzkaller login: [ 30.047364] sshd (213) used greatest stack depth: 24128 bytes left [ 30.048427] BUG: Bad rss-counter state mm:0000000093eb451f type:MM_FILEPAGES val:33 [ 30.049683] BUG: Bad rss-counter state mm:0000000093eb451f type:MM_ANONPAGES val:22 [ 30.219001] ================================================================== [ 30.219934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.220882] Read of size 8 at addr ffff888009cfc3f8 by task sshd/220 [ 30.221758] [ 30.221985] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.222861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.223858] Call Trace: [ 30.224188] [ 30.224476] dump_stack_lvl+0x91/0xf0 [ 30.224978] print_report+0xcc/0x620 [ 30.225494] ? __virt_addr_valid+0x102/0x340 [ 30.226062] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.226705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.227334] kasan_report+0xbe/0xf0 [ 30.227823] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.228456] vma_interval_tree_remove+0xc75/0xec0 [ 30.229067] vma_prepare+0xc54/0x11a0 [ 30.229564] __split_vma+0x5af/0x950 [ 30.230049] ? __pfx___split_vma+0x10/0x10 [ 30.230590] ? find_held_lock+0x2c/0x110 [ 30.231113] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.231686] ? lock_is_held_type+0x9f/0x120 [ 30.232229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.232840] ? mtree_range_walk+0x632/0x900 [ 30.233407] ? mas_walk+0x5c7/0x7c0 [ 30.233902] do_vmi_munmap+0x1f1/0x2b0 [ 30.234401] mmap_region+0x1f9/0x2660 [ 30.234896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.235415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.236138] ? __pfx_lock_acquire+0x10/0x10 [ 30.236679] ? __pfx_mmap_region+0x10/0x10 [ 30.237222] ? security_mmap_addr+0x7d/0xa0 [ 30.237776] ? get_unmapped_area+0x1f5/0x3f0 [ 30.238330] do_mmap+0x854/0xf00 [ 30.238785] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.239285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.239868] ksys_mmap_pgoff+0x3af/0x500 [ 30.240381] do_syscall_64+0x3f/0x90 [ 30.240861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.241533] RIP: 0033:0x7f71177e9d82 [ 30.242002] 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 [ 30.244167] RSP: 002b:00007ffde39ea8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.245099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71177e9d82 [ 30.245975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7116c23000 [ 30.246832] RBP: 00007f7116c23000 R08: 0000000000000009 R09: 0000000000001000 [ 30.247687] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f11b636f70 [ 30.248544] R13: 00007ffde39ea8c0 R14: 00007ffde39ea8f0 R15: 00007ffde39eac50 [ 30.249442] [ 30.249746] [ 30.249962] Allocated by task 213: [ 30.250403] kasan_save_stack+0x22/0x50 [ 30.250921] kasan_set_track+0x25/0x30 [ 30.251416] __kasan_slab_alloc+0x59/0x70 [ 30.251955] kmem_cache_alloc+0x16b/0x370 [ 30.252481] vm_area_dup+0x20/0x160 [ 30.252951] __split_vma+0x170/0x950 [ 30.253454] split_vma+0xc6/0x110 [ 30.253898] mprotect_fixup+0x8d2/0xb30 [ 30.254401] do_mprotect_pkey+0x87e/0xd40 [ 30.254930] __x64_sys_mprotect+0x78/0xc0 [ 30.255457] do_syscall_64+0x3f/0x90 [ 30.255941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.256592] [ 30.256809] Freed by task 213: [ 30.257204] kasan_save_stack+0x22/0x50 [ 30.257715] kasan_set_track+0x25/0x30 [ 30.258209] kasan_save_free_info+0x2b/0x50 [ 30.258759] __kasan_slab_free+0x10a/0x190 [ 30.259296] kmem_cache_free+0x10d/0x4d0 [ 30.259805] rcu_core+0x8c8/0x2860 [ 30.260261] __do_softirq+0x1b7/0x7d4 [ 30.260744] [ 30.260961] Last potentially related work creation: [ 30.261558] kasan_save_stack+0x22/0x50 [ 30.262065] __kasan_record_aux_stack+0x8e/0xa0 [ 30.262651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.263311] remove_vma+0x139/0x170 [ 30.263768] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.264334] do_vmi_munmap+0x1f1/0x2b0 [ 30.264826] __vm_munmap+0x138/0x3a0 [ 30.265295] __x64_sys_munmap+0x59/0x80 [ 30.265814] do_syscall_64+0x3f/0x90 [ 30.266298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.266953] [ 30.267175] Second to last potentially related work creation: [ 30.267868] kasan_save_stack+0x22/0x50 [ 30.268375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.268964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.269633] remove_vma+0x139/0x170 [ 30.270090] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.270660] do_vmi_munmap+0x1f1/0x2b0 [ 30.271154] __vm_munmap+0x138/0x3a0 [ 30.271627] elf_map+0x26f/0x310 [ 30.272081] load_elf_binary+0x3417/0x5030 [ 30.272626] bprm_execve+0x803/0x1940 [ 30.273108] do_execveat_common+0x734/0x8e0 [ 30.273658] __x64_sys_execve+0x93/0xc0 [ 30.274149] do_syscall_64+0x3f/0x90 [ 30.274628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275273] [ 30.275495] The buggy address belongs to the object at ffff888009cfc3a0 [ 30.275495] which belongs to the cache vm_area_struct of size 168 [ 30.276971] The buggy address is located 88 bytes inside of [ 30.276971] freed 168-byte region [ffff888009cfc3a0, ffff888009cfc448) [ 30.278384] [ 30.278602] The buggy address belongs to the physical page: [ 30.279267] page:00000000469252b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9cfc [ 30.280367] memcg:ffff88800d5d9701 [ 30.280803] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.281528] page_type: 0xffffffff() [ 30.281988] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.282920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5d9701 [ 30.283842] page dumped because: kasan: bad access detected [ 30.284520] [ 30.284736] Memory state around the buggy address: [ 30.285322] ffff888009cfc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.286198] ffff888009cfc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.287073] >ffff888009cfc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.287926] ^ [ 30.288794] ffff888009cfc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.289659] ffff888009cfc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.290526] ================================================================== [ 30.291584] Disabling lock debugging due to kernel taint [ 32.917581] BUG: Bad rss-counter state mm:0000000076adc660 type:MM_FILEPAGES val:33 [ 32.918521] BUG: Bad rss-counter state mm:0000000076adc660 type:MM_ANONPAGES val:22 [ 33.385415] BUG: Bad rss-counter state mm:00000000e5ce17cf type:MM_FILEPAGES val:32 [ 33.386712] BUG: Bad rss-counter state mm:00000000e5ce17cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37306' (ECDSA) to the list of known hosts. 2023/06/20 17:35:58 fuzzer started 2023/06/20 17:35:59 dialing manager at localhost:36067 2023/06/20 17:35:59 checking machine... 2023/06/20 17:35:59 checking revisions... [ 34.107039] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:35:59 testing simple program... [ 34.157680] cgroup: Unknown subsys name 'net' [ 34.195254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:58 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000000008 RCX=1ffff1100204bae0 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888008fe8ff8 RBP=ffff88800fd0fb18 RSP=ffff88800fd0f9f8 R8 =0000000000000000 R9 =ffffed10011fd1ff R10=ffff888008fe8ffb R11=0000000000000000 R12=ffff888008fe8ff8 R13=00000000000000e5 R14=ffff888008fe8ea0 R15=ffff88801025d700 RIP=ffffffff83869a94 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 00007f64ede23900 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=00007ffc7aca1000 CR3=00000000167f2000 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=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 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=00007f5d3763c170 CR3=00000000095a0000 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=a43a661a8601f6a3c044bb3db55b14b8 XMM02=000000000011b368eff9b2d0a8fce9cb XMM03=000000000011b4382c67c8bc2e329bc3 XMM04=fa8d89a0d7cb4c3e00000000000ae988 XMM05=19e9129bd510f2350000000000133840 XMM06=baec50a876d1e4fd00000000001326a8 XMM07=e042d86d42eb936e0000000000122360 XMM08=d60a1caaf1382c87000000000011b438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000