syzkaller login: [ 31.190664] BUG: Bad rss-counter state mm:0000000093b67aa3 type:MM_FILEPAGES val:33 [ 31.191833] BUG: Bad rss-counter state mm:0000000093b67aa3 type:MM_ANONPAGES val:22 [ 31.232768] ================================================================== [ 31.233689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234632] Read of size 8 at addr ffff88800ef17c20 by task sshd/219 [ 31.235478] [ 31.235701] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237576] Call Trace: [ 31.237914] [ 31.238202] dump_stack_lvl+0x91/0xf0 [ 31.238701] print_report+0xcc/0x620 [ 31.239192] ? __virt_addr_valid+0x102/0x340 [ 31.239742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240356] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240971] kasan_report+0xbe/0xf0 [ 31.241446] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242096] vma_interval_tree_remove+0xc75/0xec0 [ 31.242697] vma_prepare+0xc54/0x11a0 [ 31.243175] __split_vma+0x5af/0x950 [ 31.243645] ? __pfx___split_vma+0x10/0x10 [ 31.244175] ? find_held_lock+0x2c/0x110 [ 31.244693] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245257] ? lock_is_held_type+0x9f/0x120 [ 31.245807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246418] ? mtree_range_walk+0x632/0x900 [ 31.246967] ? mas_walk+0x5c7/0x7c0 [ 31.247448] do_vmi_munmap+0x1f1/0x2b0 [ 31.247940] mmap_region+0x1f9/0x2660 [ 31.248420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.248934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249644] ? __pfx_lock_acquire+0x10/0x10 [ 31.250193] ? __pfx_mmap_region+0x10/0x10 [ 31.250722] ? security_mmap_addr+0x7d/0xa0 [ 31.251247] ? get_unmapped_area+0x1f5/0x3f0 [ 31.251797] do_mmap+0x854/0xf00 [ 31.252235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.252728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253285] ksys_mmap_pgoff+0x3af/0x500 [ 31.253799] do_syscall_64+0x3f/0x90 [ 31.254274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254928] RIP: 0033:0x7f01cbeb5d82 [ 31.255382] 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 [ 31.257508] RSP: 002b:00007ffd8dbecd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.258419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01cbeb5d82 [ 31.259267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01cb2ef000 [ 31.260116] RBP: 00007f01cb2ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.260962] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fa34c7ec0 [ 31.261832] R13: 00007ffd8dbecd20 R14: 00007ffd8dbecd50 R15: 00007ffd8dbed0b0 [ 31.262687] [ 31.262982] [ 31.263196] Allocated by task 212: [ 31.263626] kasan_save_stack+0x22/0x50 [ 31.264131] kasan_set_track+0x25/0x30 [ 31.264624] __kasan_slab_alloc+0x59/0x70 [ 31.265149] kmem_cache_alloc+0x16b/0x370 [ 31.265671] vm_area_dup+0x20/0x160 [ 31.266130] __split_vma+0x170/0x950 [ 31.266600] split_vma+0xc6/0x110 [ 31.267037] mprotect_fixup+0x8d2/0xb30 [ 31.267536] do_mprotect_pkey+0x87e/0xd40 [ 31.268052] __x64_sys_mprotect+0x78/0xc0 [ 31.268570] do_syscall_64+0x3f/0x90 [ 31.269042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269688] [ 31.269919] Freed by task 10: [ 31.270301] kasan_save_stack+0x22/0x50 [ 31.270809] kasan_set_track+0x25/0x30 [ 31.271298] kasan_save_free_info+0x2b/0x50 [ 31.271838] __kasan_slab_free+0x10a/0x190 [ 31.272369] kmem_cache_free+0x10d/0x4d0 [ 31.272879] rcu_core+0x8c8/0x2860 [ 31.273320] __do_softirq+0x1b7/0x7d4 [ 31.273799] [ 31.274015] Last potentially related work creation: [ 31.274599] kasan_save_stack+0x22/0x50 [ 31.275099] __kasan_record_aux_stack+0x8e/0xa0 [ 31.275667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276311] remove_vma+0x139/0x170 [ 31.276767] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277331] do_vmi_munmap+0x1f1/0x2b0 [ 31.277832] __vm_munmap+0x138/0x3a0 [ 31.278301] __x64_sys_munmap+0x59/0x80 [ 31.278802] do_syscall_64+0x3f/0x90 [ 31.279278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279917] [ 31.280131] The buggy address belongs to the object at ffff88800ef17bc8 [ 31.280131] which belongs to the cache vm_area_struct of size 168 [ 31.281587] The buggy address is located 88 bytes inside of [ 31.281587] freed 168-byte region [ffff88800ef17bc8, ffff88800ef17c70) [ 31.282988] [ 31.283206] The buggy address belongs to the physical page: [ 31.283862] page:0000000016a5b202 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef17 [ 31.284942] memcg:ffff88800e1b1001 [ 31.285369] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.286041] page_type: 0xffffffff() [ 31.286491] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.287411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b1001 [ 31.288319] page dumped because: kasan: bad access detected [ 31.288983] [ 31.289203] Memory state around the buggy address: [ 31.289790] ffff88800ef17b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.290654] ffff88800ef17b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.291513] >ffff88800ef17c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.292369] ^ [ 31.292893] ffff88800ef17c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.293738] ffff88800ef17d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.294591] ================================================================== [ 31.295633] Disabling lock debugging due to kernel taint [ 33.161513] BUG: Bad rss-counter state mm:000000008725af1b type:MM_FILEPAGES val:33 [ 33.162779] BUG: Bad rss-counter state mm:000000008725af1b type:MM_ANONPAGES val:22 [ 33.617735] BUG: Bad rss-counter state mm:000000006d902871 type:MM_FILEPAGES val:33 [ 33.618771] BUG: Bad rss-counter state mm:000000006d902871 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62677' (ECDSA) to the list of known hosts. 2023/06/20 12:06:05 fuzzer started 2023/06/20 12:06:05 dialing manager at localhost:36067 2023/06/20 12:06:06 checking machine... 2023/06/20 12:06:06 checking revisions... [ 34.311007] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:06:06 testing simple program... [ 34.362426] cgroup: Unknown subsys name 'net' [ 34.409433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88801020c0d8 RSP=ffff888009e6f868 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0030733a745f6c65 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=ffff88801020c000 RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 00007f56e4d48700 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=00007f6eb0acacc8 CR3=000000000e57e000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88809581da00 RCX=ffffffff811430ee RDX=ffff8880179751c0 RSI=ffff88809581da00 RDI=ffff88801581da00 RBP=ffff88801581da00 RSP=ffff88806cf09d78 R8 =0000000000000001 R9 =ffffed1002b03b42 R10=ffff88801581da13 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea000036b6c0 R14=ffffffff813782f8 R15=ffff88800dadb958 RIP=ffffffff814c0378 RFL=00000286 [--S--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 00007fa41a090900 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=00007fa41a06f020 CR3=000000000ed1e000 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