syzkaller login: [ 35.715779] BUG: Bad rss-counter state mm:00000000e8f56a80 type:MM_FILEPAGES val:33 [ 35.716823] BUG: Bad rss-counter state mm:00000000e8f56a80 type:MM_ANONPAGES val:22 [ 35.832896] ================================================================== [ 35.833550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.834213] Read of size 8 at addr ffff88800d692c20 by task sshd/219 [ 35.834741] [ 35.834891] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.835483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.836377] Call Trace: [ 35.836595] [ 35.836795] dump_stack_lvl+0x91/0xf0 [ 35.837139] print_report+0xcc/0x620 [ 35.837469] ? __virt_addr_valid+0x102/0x340 [ 35.837855] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.838330] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.838760] kasan_report+0xbe/0xf0 [ 35.839081] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.839519] vma_interval_tree_remove+0xc75/0xec0 [ 35.839992] vma_prepare+0xc54/0x11a0 [ 35.840324] __split_vma+0x5af/0x950 [ 35.840648] ? __pfx___split_vma+0x10/0x10 [ 35.841011] ? find_held_lock+0x2c/0x110 [ 35.841366] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.841767] ? lock_is_held_type+0x9f/0x120 [ 35.842142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.842541] ? mtree_range_walk+0x632/0x900 [ 35.842895] ? mas_walk+0x5c7/0x7c0 [ 35.843223] do_vmi_munmap+0x1f1/0x2b0 [ 35.843570] mmap_region+0x1f9/0x2660 [ 35.843913] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.844269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.844765] ? __pfx_lock_acquire+0x10/0x10 [ 35.845128] ? __pfx_mmap_region+0x10/0x10 [ 35.845488] ? security_mmap_addr+0x7d/0xa0 [ 35.845857] ? get_unmapped_area+0x1f5/0x3f0 [ 35.846226] do_mmap+0x854/0xf00 [ 35.846530] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.846882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.847249] ksys_mmap_pgoff+0x3af/0x500 [ 35.847559] do_syscall_64+0x3f/0x90 [ 35.847932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.848383] RIP: 0033:0x7f4290a81d82 [ 35.848696] 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 [ 35.850107] RSP: 002b:00007ffd723eea78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.850727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4290a81d82 [ 35.851294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f428febb000 [ 35.851926] RBP: 00007f428febb000 R08: 0000000000000009 R09: 0000000000001000 [ 35.852476] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de0e516f70 [ 35.853040] R13: 00007ffd723eea90 R14: 00007ffd723eeac0 R15: 00007ffd723eee20 [ 35.853628] [ 35.853822] [ 35.853962] Allocated by task 212: [ 35.854235] kasan_save_stack+0x22/0x50 [ 35.854561] kasan_set_track+0x25/0x30 [ 35.854918] __kasan_slab_alloc+0x59/0x70 [ 35.855259] kmem_cache_alloc+0x16b/0x370 [ 35.855602] vm_area_dup+0x20/0x160 [ 35.855904] __split_vma+0x170/0x950 [ 35.856212] split_vma+0xc6/0x110 [ 35.856497] mprotect_fixup+0x8d2/0xb30 [ 35.856827] do_mprotect_pkey+0x87e/0xd40 [ 35.857160] __x64_sys_mprotect+0x78/0xc0 [ 35.857484] do_syscall_64+0x3f/0x90 [ 35.857810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.858206] [ 35.858341] Freed by task 19: [ 35.858579] kasan_save_stack+0x22/0x50 [ 35.858946] kasan_set_track+0x25/0x30 [ 35.859298] kasan_save_free_info+0x2b/0x50 [ 35.859748] __kasan_slab_free+0x10a/0x190 [ 35.860176] kmem_cache_free+0x10d/0x4d0 [ 35.860558] rcu_core+0x8c8/0x2860 [ 35.860899] __do_softirq+0x1b7/0x7d4 [ 35.861239] [ 35.861396] Last potentially related work creation: [ 35.861840] kasan_save_stack+0x22/0x50 [ 35.862192] __kasan_record_aux_stack+0x8e/0xa0 [ 35.862590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.863028] remove_vma+0x139/0x170 [ 35.863354] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.863788] do_vmi_munmap+0x1f1/0x2b0 [ 35.864091] __vm_munmap+0x138/0x3a0 [ 35.864380] __x64_sys_munmap+0x59/0x80 [ 35.864727] do_syscall_64+0x3f/0x90 [ 35.865047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.865474] [ 35.865617] Second to last potentially related work creation: [ 35.866073] kasan_save_stack+0x22/0x50 [ 35.866413] __kasan_record_aux_stack+0x8e/0xa0 [ 35.866808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.867235] remove_vma+0x139/0x170 [ 35.867546] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.867975] do_vmi_munmap+0x1f1/0x2b0 [ 35.868302] mmap_region+0x1f9/0x2660 [ 35.868616] do_mmap+0x854/0xf00 [ 35.868942] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.869272] ksys_mmap_pgoff+0x3af/0x500 [ 35.869606] do_syscall_64+0x3f/0x90 [ 35.869922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.870330] [ 35.870463] The buggy address belongs to the object at ffff88800d692bc8 [ 35.870463] which belongs to the cache vm_area_struct of size 168 [ 35.871459] The buggy address is located 88 bytes inside of [ 35.871459] freed 168-byte region [ffff88800d692bc8, ffff88800d692c70) [ 35.872447] [ 35.872586] The buggy address belongs to the physical page: [ 35.873057] page:0000000091446c82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd692 [ 35.873769] memcg:ffff8880097c3901 [ 35.874051] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.874488] page_type: 0xffffffff() [ 35.874785] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.875370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097c3901 [ 35.875999] page dumped because: kasan: bad access detected [ 35.876441] [ 35.876584] Memory state around the buggy address: [ 35.876963] ffff88800d692b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.877528] ffff88800d692b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.878107] >ffff88800d692c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.878680] ^ [ 35.879009] ffff88800d692c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.879620] ffff88800d692d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.880185] ================================================================== [ 35.881229] Disabling lock debugging due to kernel taint [ 37.314896] BUG: Bad rss-counter state mm:00000000cf30b4ae type:MM_FILEPAGES val:33 [ 37.315590] BUG: Bad rss-counter state mm:00000000cf30b4ae type:MM_ANONPAGES val:22 [ 37.687767] BUG: Bad rss-counter state mm:00000000230cc361 type:MM_FILEPAGES val:33 [ 37.688409] BUG: Bad rss-counter state mm:00000000230cc361 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60442' (ECDSA) to the list of known hosts. 2023/06/20 08:53:20 fuzzer started 2023/06/20 08:53:20 dialing manager at localhost:44161 2023/06/20 08:53:20 checking machine... 2023/06/20 08:53:20 checking revisions... [ 38.262803] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:53:21 testing simple program... [ 38.295037] cgroup: Unknown subsys name 'net' [ 38.329003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:53:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe7f15a738 CR3=0000000005482000 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=00007f5b7a36c510000055eae588e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015890000 RBX=ffff88801588f640 RCX=0000000000000001 RDX=1ffff11002b11e43 RSI=ffff88801588f610 RDI=ffff88801588f218 RBP=ffff888015888000 RSP=ffff88801588f198 R8 =0000000000000001 R9 =ffff88801588f248 R10=0000000000038001 R11=0000000000021edf R12=ffff88801588f268 R13=ffff88801588f250 R14=ffff88801588f610 R15=ffff88801588f208 RIP=ffffffff81131cbc RFL=00000206 [-----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 00007fb0d2c99900 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=00007f7234443650 CR3=000000000c6ea000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bec01f248f80e9ec00000000000ae988 XMM05=4720ccefc57f5bf00000000000135bc0 XMM06=806171799158d9670000000000134640 XMM07=fb795ef6d65770560000000000123be0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000