syzkaller login: [ 31.193195] BUG: Bad rss-counter state mm:00000000ecc79482 type:MM_FILEPAGES val:33 [ 31.194353] BUG: Bad rss-counter state mm:00000000ecc79482 type:MM_ANONPAGES val:22 [ 31.360604] ================================================================== [ 31.361545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.362482] Read of size 8 at addr ffff88800ecf66b0 by task sshd/219 [ 31.363244] [ 31.363466] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.364517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.365498] Call Trace: [ 31.365821] [ 31.366105] dump_stack_lvl+0x91/0xf0 [ 31.366600] print_report+0xcc/0x620 [ 31.367084] ? __virt_addr_valid+0x102/0x340 [ 31.367642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.368291] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.368908] kasan_report+0xbe/0xf0 [ 31.369390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370009] vma_interval_tree_remove+0xc75/0xec0 [ 31.370619] vma_prepare+0xc54/0x11a0 [ 31.371099] __split_vma+0x5af/0x950 [ 31.371573] ? __pfx___split_vma+0x10/0x10 [ 31.372108] ? find_held_lock+0x2c/0x110 [ 31.372635] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.373199] ? lock_is_held_type+0x9f/0x120 [ 31.373749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.374352] ? mtree_range_walk+0x632/0x900 [ 31.374913] ? mas_walk+0x5c7/0x7c0 [ 31.375391] do_vmi_munmap+0x1f1/0x2b0 [ 31.375901] mmap_region+0x1f9/0x2660 [ 31.376383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.376895] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.377608] ? __pfx_lock_acquire+0x10/0x10 [ 31.378147] ? __pfx_mmap_region+0x10/0x10 [ 31.378672] ? security_mmap_addr+0x7d/0xa0 [ 31.379215] ? get_unmapped_area+0x1f5/0x3f0 [ 31.379786] do_mmap+0x854/0xf00 [ 31.380239] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.380741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.381314] ksys_mmap_pgoff+0x3af/0x500 [ 31.381825] do_syscall_64+0x3f/0x90 [ 31.382304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382954] RIP: 0033:0x7f90bd888d82 [ 31.383416] 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 [ 31.385567] RSP: 002b:00007ffec73adec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.386483] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90bd888d82 [ 31.387337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90bccc2000 [ 31.388204] RBP: 00007f90bccc2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.389057] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d66c3ed90 [ 31.389912] R13: 00007ffec73adee0 R14: 00007ffec73adf10 R15: 00007ffec73ae270 [ 31.390776] [ 31.391067] [ 31.391284] Allocated by task 212: [ 31.391720] kasan_save_stack+0x22/0x50 [ 31.392254] kasan_set_track+0x25/0x30 [ 31.392753] __kasan_slab_alloc+0x59/0x70 [ 31.393276] kmem_cache_alloc+0x16b/0x370 [ 31.393793] vm_area_dup+0x20/0x160 [ 31.394247] __split_vma+0x170/0x950 [ 31.394730] split_vma+0xc6/0x110 [ 31.395169] mprotect_fixup+0x8d2/0xb30 [ 31.395669] do_mprotect_pkey+0x87e/0xd40 [ 31.396201] __x64_sys_mprotect+0x78/0xc0 [ 31.396727] do_syscall_64+0x3f/0x90 [ 31.397206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397855] [ 31.398073] Freed by task 212: [ 31.398472] kasan_save_stack+0x22/0x50 [ 31.398985] kasan_set_track+0x25/0x30 [ 31.399472] kasan_save_free_info+0x2b/0x50 [ 31.400040] __kasan_slab_free+0x10a/0x190 [ 31.400577] kmem_cache_free+0x10d/0x4d0 [ 31.401092] rcu_core+0x8c8/0x2860 [ 31.401549] __do_softirq+0x1b7/0x7d4 [ 31.402043] [ 31.402273] Last potentially related work creation: [ 31.402881] kasan_save_stack+0x22/0x50 [ 31.403393] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.404651] remove_vma+0x139/0x170 [ 31.405186] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.405787] do_vmi_munmap+0x1f1/0x2b0 [ 31.406286] __vm_munmap+0x138/0x3a0 [ 31.406770] __x64_sys_munmap+0x59/0x80 [ 31.407299] do_syscall_64+0x3f/0x90 [ 31.407807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408467] [ 31.408686] The buggy address belongs to the object at ffff88800ecf6658 [ 31.408686] which belongs to the cache vm_area_struct of size 168 [ 31.410166] The buggy address is located 88 bytes inside of [ 31.410166] freed 168-byte region [ffff88800ecf6658, ffff88800ecf6700) [ 31.411568] [ 31.411803] The buggy address belongs to the physical page: [ 31.412466] page:0000000008a8a69f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecf6 [ 31.413556] memcg:ffff88800de68a01 [ 31.413985] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.414635] page_type: 0xffffffff() [ 31.415097] raw: 0100000000000200 ffff8880087a0c80 ffffea000067e400 dead000000000004 [ 31.416036] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de68a01 [ 31.416960] page dumped because: kasan: bad access detected [ 31.417633] [ 31.417852] Memory state around the buggy address: [ 31.418458] ffff88800ecf6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.419333] ffff88800ecf6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.420219] >ffff88800ecf6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.421072] ^ [ 31.421654] ffff88800ecf6700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.422503] ffff88800ecf6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.423360] ================================================================== [ 31.424292] Disabling lock debugging due to kernel taint [ 33.509827] BUG: Bad rss-counter state mm:000000000af0d436 type:MM_FILEPAGES val:33 [ 33.510786] BUG: Bad rss-counter state mm:000000000af0d436 type:MM_ANONPAGES val:22 [ 34.005019] BUG: Bad rss-counter state mm:00000000a9f5aebb type:MM_FILEPAGES val:33 [ 34.006450] BUG: Bad rss-counter state mm:00000000a9f5aebb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10490' (ECDSA) to the list of known hosts. 2023/06/21 10:30:57 fuzzer started 2023/06/21 10:30:57 dialing manager at localhost:36067 2023/06/21 10:30:57 checking machine... 2023/06/21 10:30:57 checking revisions... [ 34.746174] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:30:57 testing simple program... [ 34.796147] cgroup: Unknown subsys name 'net' [ 34.851214] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:30:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad720 RCX=ffff888010287840 RDX=1ffff11002050eff RSI=ffff888010287838 RDI=ffffffff813ad720 RBP=ffff8880102877f8 RSP=ffff888010287778 R8 =0000000000000001 R9 =ffff8880102877e0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888010287868 R13=0000000000000000 R14=ffff888015da51c0 R15=ffff8880169a3000 RIP=ffffffff811fc8a1 RFL=00000202 [-------] 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 00007f90c98d4900 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=00007f90c9e8c0b0 CR3=0000000017fb8000 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=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ada RSP=ffff88806cf09a28 R8 =ffffffff864bbb58 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888016a27f58 R15=ffff88806cf09a98 RIP=ffffffff81131b5f 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 00007f2c6c38e700 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=00007f464f091d80 CR3=0000000009c26000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732037353a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000