syzkaller login: [ 38.802454] BUG: Bad rss-counter state mm:00000000c98e6dfe type:MM_FILEPAGES val:33 [ 38.803661] BUG: Bad rss-counter state mm:00000000c98e6dfe type:MM_ANONPAGES val:22 [ 38.888129] ================================================================== [ 38.889236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.890369] Read of size 8 at addr ffff88800e2d35c8 by task sshd/226 [ 38.891258] [ 38.891478] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.892329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.893304] Call Trace: [ 38.893644] [ 38.893926] dump_stack_lvl+0x91/0xf0 [ 38.894420] print_report+0xcc/0x620 [ 38.894915] ? __virt_addr_valid+0x102/0x340 [ 38.895471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896098] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896716] kasan_report+0xbe/0xf0 [ 38.897194] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897824] vma_interval_tree_remove+0xc75/0xec0 [ 38.898438] vma_prepare+0xc54/0x11a0 [ 38.898932] __split_vma+0x5af/0x950 [ 38.899419] ? __pfx___split_vma+0x10/0x10 [ 38.899964] ? find_held_lock+0x2c/0x110 [ 38.900508] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.901079] ? lock_is_held_type+0x9f/0x120 [ 38.901647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.902260] ? mtree_range_walk+0x632/0x900 [ 38.902827] ? mas_walk+0x5c7/0x7c0 [ 38.903317] do_vmi_munmap+0x1f1/0x2b0 [ 38.903815] mmap_region+0x1f9/0x2660 [ 38.904306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.904818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.905584] ? __pfx_lock_acquire+0x10/0x10 [ 38.906134] ? __pfx_mmap_region+0x10/0x10 [ 38.906676] ? security_mmap_addr+0x7d/0xa0 [ 38.907231] ? get_unmapped_area+0x1f5/0x3f0 [ 38.907796] do_mmap+0x854/0xf00 [ 38.908240] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.908753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.909341] ksys_mmap_pgoff+0x3af/0x500 [ 38.909871] do_syscall_64+0x3f/0x90 [ 38.910364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911019] RIP: 0033:0x7fed994e7d82 [ 38.911481] 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 [ 38.913653] RSP: 002b:00007ffcb30a89b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.914574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed994e7d82 [ 38.915442] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed98921000 [ 38.916318] RBP: 00007fed98921000 R08: 0000000000000009 R09: 0000000000001000 [ 38.917189] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aefcd28d90 [ 38.918075] R13: 00007ffcb30a89d0 R14: 00007ffcb30a8a00 R15: 00007ffcb30a8d60 [ 38.918956] [ 38.919264] [ 38.919482] Allocated by task 219: [ 38.919921] kasan_save_stack+0x22/0x50 [ 38.920448] kasan_set_track+0x25/0x30 [ 38.920959] __kasan_slab_alloc+0x59/0x70 [ 38.921523] kmem_cache_alloc+0x16b/0x370 [ 38.922060] vm_area_dup+0x20/0x160 [ 38.922532] __split_vma+0x170/0x950 [ 38.923016] split_vma+0xc6/0x110 [ 38.923471] mprotect_fixup+0x8d2/0xb30 [ 38.923986] do_mprotect_pkey+0x87e/0xd40 [ 38.924531] __x64_sys_mprotect+0x78/0xc0 [ 38.925064] do_syscall_64+0x3f/0x90 [ 38.925569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926234] [ 38.926455] Freed by task 219: [ 38.926857] kasan_save_stack+0x22/0x50 [ 38.927372] kasan_set_track+0x25/0x30 [ 38.927881] kasan_save_free_info+0x2b/0x50 [ 38.928434] __kasan_slab_free+0x10a/0x190 [ 38.928986] kmem_cache_free+0x10d/0x4d0 [ 38.929541] rcu_core+0x8c8/0x2860 [ 38.929996] __do_softirq+0x1b7/0x7d4 [ 38.930498] [ 38.930719] Last potentially related work creation: [ 38.931313] kasan_save_stack+0x22/0x50 [ 38.931890] __kasan_record_aux_stack+0x8e/0xa0 [ 38.932486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933144] remove_vma+0x139/0x170 [ 38.933619] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934186] do_vmi_munmap+0x1f1/0x2b0 [ 38.934683] __vm_munmap+0x138/0x3a0 [ 38.935157] __x64_sys_munmap+0x59/0x80 [ 38.935665] do_syscall_64+0x3f/0x90 [ 38.936153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936816] [ 38.937033] The buggy address belongs to the object at ffff88800e2d3570 [ 38.937033] which belongs to the cache vm_area_struct of size 168 [ 38.938570] The buggy address is located 88 bytes inside of [ 38.938570] freed 168-byte region [ffff88800e2d3570, ffff88800e2d3618) [ 38.940022] [ 38.940249] The buggy address belongs to the physical page: [ 38.940925] page:00000000c1ed82b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d3 [ 38.942064] memcg:ffff8880163e8a01 [ 38.942502] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.943173] page_type: 0xffffffff() [ 38.943637] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.944579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163e8a01 [ 38.945522] page dumped because: kasan: bad access detected [ 38.946202] [ 38.946429] Memory state around the buggy address: [ 38.947028] ffff88800e2d3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.947914] ffff88800e2d3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.948796] >ffff88800e2d3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.949696] ^ [ 38.950382] ffff88800e2d3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.951263] ffff88800e2d3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.952148] ================================================================== [ 38.953102] Disabling lock debugging due to kernel taint [ 41.638416] BUG: Bad rss-counter state mm:00000000b7d0a1b4 type:MM_FILEPAGES val:33 [ 41.640226] BUG: Bad rss-counter state mm:00000000b7d0a1b4 type:MM_ANONPAGES val:22 [ 42.139416] BUG: Bad rss-counter state mm:00000000261c8002 type:MM_FILEPAGES val:33 [ 42.140896] BUG: Bad rss-counter state mm:00000000261c8002 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21517' (ECDSA) to the list of known hosts. 2023/06/20 11:01:52 fuzzer started 2023/06/20 11:01:53 dialing manager at localhost:36067 2023/06/20 11:01:53 checking machine... 2023/06/20 11:01:53 checking revisions... [ 42.870414] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:53 testing simple program... [ 42.925845] cgroup: Unknown subsys name 'net' [ 43.014476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:52 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=ffff88800f3b0000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800f3b0000 RSP=ffff88806ce09dd8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=ffff88806ce09ff8 R12=000000000001c060 R13=ffff88800f3b44c8 R14=ffff88800f3b0234 R15=0000000000000001 RIP=ffffffff8219168f RFL=00000046 [---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 00007f25f560b900 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=00007f25f5bc30b0 CR3=000000000e3b6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006c0d34 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff81660b0f RDI=0000000000000005 RBP=ffff888008d7f350 RSP=ffff888008d7f108 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000128 R12=0000000000000003 R13=dffffc0000000000 R14=0000000000000001 R15=ffffea00006c0d00 RIP=ffffffff814c089b 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 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=00007f25f5bc0650 CR3=00000000169d4000 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=31303a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3533325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343431 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000