syzkaller login: [ 29.098846] BUG: Bad rss-counter state mm:00000000020d2730 type:MM_FILEPAGES val:33 [ 29.100836] BUG: Bad rss-counter state mm:00000000020d2730 type:MM_ANONPAGES val:22 [ 29.260310] ================================================================== [ 29.261409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.262534] Read of size 8 at addr ffff88801a285968 by task sshd/220 [ 29.263588] [ 29.263846] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.264877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.266025] Call Trace: [ 29.266409] [ 29.266740] dump_stack_lvl+0x91/0xf0 [ 29.267332] print_report+0xcc/0x620 [ 29.267926] ? __virt_addr_valid+0x102/0x340 [ 29.268603] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.269228] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.269851] kasan_report+0xbe/0xf0 [ 29.270327] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.270950] vma_interval_tree_remove+0xc75/0xec0 [ 29.271557] vma_prepare+0xc54/0x11a0 [ 29.272046] __split_vma+0x5af/0x950 [ 29.272536] ? __pfx___split_vma+0x10/0x10 [ 29.273057] ? find_held_lock+0x2c/0x110 [ 29.273581] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.274159] ? lock_is_held_type+0x9f/0x120 [ 29.274706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.275314] ? mtree_range_walk+0x632/0x900 [ 29.275869] ? mas_walk+0x5c7/0x7c0 [ 29.276352] do_vmi_munmap+0x1f1/0x2b0 [ 29.276852] mmap_region+0x1f9/0x2660 [ 29.277330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.277852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.278568] ? __pfx_lock_acquire+0x10/0x10 [ 29.279104] ? __pfx_mmap_region+0x10/0x10 [ 29.279642] ? security_mmap_addr+0x7d/0xa0 [ 29.280166] ? get_unmapped_area+0x1f5/0x3f0 [ 29.280743] do_mmap+0x854/0xf00 [ 29.281173] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.281674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.282249] ksys_mmap_pgoff+0x3af/0x500 [ 29.282754] do_syscall_64+0x3f/0x90 [ 29.283234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.283880] RIP: 0033:0x7f8d34453d82 [ 29.284353] 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 [ 29.286466] RSP: 002b:00007ffcd3d8ec58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.287388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d34453d82 [ 29.288243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d3388d000 [ 29.289106] RBP: 00007f8d3388d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.289960] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f57fdd2d90 [ 29.290811] R13: 00007ffcd3d8ec70 R14: 00007ffcd3d8eca0 R15: 00007ffcd3d8f000 [ 29.291682] [ 29.291975] [ 29.292202] Allocated by task 213: [ 29.292650] kasan_save_stack+0x22/0x50 [ 29.293161] kasan_set_track+0x25/0x30 [ 29.293664] __kasan_slab_alloc+0x59/0x70 [ 29.294195] kmem_cache_alloc+0x16b/0x370 [ 29.294712] vm_area_dup+0x20/0x160 [ 29.295176] __split_vma+0x170/0x950 [ 29.295652] split_vma+0xc6/0x110 [ 29.296128] mprotect_fixup+0x8d2/0xb30 [ 29.296663] do_mprotect_pkey+0x87e/0xd40 [ 29.297207] __x64_sys_mprotect+0x78/0xc0 [ 29.297757] do_syscall_64+0x3f/0x90 [ 29.298249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.298917] [ 29.299133] Freed by task 213: [ 29.299535] kasan_save_stack+0x22/0x50 [ 29.300053] kasan_set_track+0x25/0x30 [ 29.300577] kasan_save_free_info+0x2b/0x50 [ 29.301140] __kasan_slab_free+0x10a/0x190 [ 29.301695] kmem_cache_free+0x10d/0x4d0 [ 29.302219] rcu_core+0x8c8/0x2860 [ 29.302691] __do_softirq+0x1b7/0x7d4 [ 29.303195] [ 29.303411] Last potentially related work creation: [ 29.304017] kasan_save_stack+0x22/0x50 [ 29.304634] __kasan_record_aux_stack+0x8e/0xa0 [ 29.305244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.305925] remove_vma+0x139/0x170 [ 29.306397] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.306976] do_vmi_munmap+0x1f1/0x2b0 [ 29.307491] __vm_munmap+0x138/0x3a0 [ 29.307974] __x64_sys_munmap+0x59/0x80 [ 29.308491] do_syscall_64+0x3f/0x90 [ 29.308986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.309659] [ 29.309882] The buggy address belongs to the object at ffff88801a285910 [ 29.309882] which belongs to the cache vm_area_struct of size 168 [ 29.311436] The buggy address is located 88 bytes inside of [ 29.311436] freed 168-byte region [ffff88801a285910, ffff88801a2859b8) [ 29.312923] [ 29.313149] The buggy address belongs to the physical page: [ 29.313844] page:0000000072df08f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a285 [ 29.315045] memcg:ffff888016521a01 [ 29.315496] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.316173] page_type: 0xffffffff() [ 29.316659] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.317623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016521a01 [ 29.318588] page dumped because: kasan: bad access detected [ 29.319280] [ 29.319511] Memory state around the buggy address: [ 29.320145] ffff88801a285800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.321080] ffff88801a285880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.321980] >ffff88801a285900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.322861] ^ [ 29.323688] ffff88801a285980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.324595] ffff88801a285a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.325463] ================================================================== [ 29.326419] Disabling lock debugging due to kernel taint [ 31.218105] BUG: Bad rss-counter state mm:000000009bedea10 type:MM_FILEPAGES val:33 [ 31.218873] BUG: Bad rss-counter state mm:000000009bedea10 type:MM_ANONPAGES val:22 [ 31.671899] BUG: Bad rss-counter state mm:000000004d07bd3c type:MM_FILEPAGES val:33 [ 31.672957] BUG: Bad rss-counter state mm:000000004d07bd3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55255' (ECDSA) to the list of known hosts. 2023/06/20 17:04:53 fuzzer started 2023/06/20 17:04:53 dialing manager at localhost:36067 2023/06/20 17:04:53 checking machine... 2023/06/20 17:04:53 checking revisions... [ 32.422924] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:04:53 testing simple program... [ 32.471314] cgroup: Unknown subsys name 'net' [ 32.513652] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014247178 RCX=ffffffff863b417e RDX=1ffff11002848e2f RSI=ffff888014247de0 RDI=ffff888014247178 RBP=ffff888014247de0 RSP=ffff8880142470d0 R8 =0000000000000001 R9 =ffff8880142471b8 R10=0000000000038001 R11=000000000008ab69 R12=0000000000000008 R13=ffff8880142471c0 R14=ffff888014247de0 R15=ffff888014247178 RIP=ffffffff8113041a 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 00007fc368ca2900 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=00007fc3680f2990 CR3=000000000c71a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5bc5c0c326de9d7900000000000ae988 XMM05=aac80100e6ec195a0000000000132f90 XMM06=4fda316b135da52b0000000000131d80 XMM07=fb795ef6d65770560000000000122048 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8121b48b RCX=ffffffff860a1201 RDX=1ffff110011c6f3a RSI=0000000000000000 RDI=ffffffff8121b48b RBP=ffffffff8121b48b RSP=ffff888008e37928 R8 =ffffffff860a12fa R9 =ffff888008e379b8 R10=0000000000038001 R11=00000000000078fb R12=0000000000000001 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800fc0fc38 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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=00007ffe00192000 CR3=0000000009880000 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=34303a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303931 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000