syzkaller login: [ 47.551954] BUG: Bad rss-counter state mm:0000000039576f2f type:MM_FILEPAGES val:33 [ 47.553335] BUG: Bad rss-counter state mm:0000000039576f2f type:MM_ANONPAGES val:22 [ 47.694764] ================================================================== [ 47.696068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.697381] Read of size 8 at addr ffff888019e0eed8 by task sshd/221 [ 47.698449] [ 47.698786] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.699974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.701298] Call Trace: [ 47.701768] [ 47.702168] dump_stack_lvl+0x91/0xf0 [ 47.702882] print_report+0xcc/0x620 [ 47.703524] ? __virt_addr_valid+0x102/0x340 [ 47.704287] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.705161] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.705994] kasan_report+0xbe/0xf0 [ 47.706678] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.707563] vma_interval_tree_remove+0xc75/0xec0 [ 47.708384] vma_prepare+0xc54/0x11a0 [ 47.709047] __split_vma+0x5af/0x950 [ 47.709680] ? __pfx___split_vma+0x10/0x10 [ 47.710409] ? find_held_lock+0x2c/0x110 [ 47.711143] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.711824] ? lock_is_held_type+0x9f/0x120 [ 47.712502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.713229] ? mtree_range_walk+0x632/0x900 [ 47.713884] ? mas_walk+0x5c7/0x7c0 [ 47.714439] do_vmi_munmap+0x1f1/0x2b0 [ 47.715051] mmap_region+0x1f9/0x2660 [ 47.715640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.716244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.717097] ? __pfx_lock_acquire+0x10/0x10 [ 47.717726] ? __pfx_mmap_region+0x10/0x10 [ 47.718356] ? security_mmap_addr+0x7d/0xa0 [ 47.718989] ? get_unmapped_area+0x1f5/0x3f0 [ 47.719652] do_mmap+0x854/0xf00 [ 47.720191] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.720798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.721488] ksys_mmap_pgoff+0x3af/0x500 [ 47.722114] do_syscall_64+0x3f/0x90 [ 47.722703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.723491] RIP: 0033:0x7f8ecb7a2d82 [ 47.724054] 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 [ 47.726683] RSP: 002b:00007fffc7c554b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.727705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ecb7a2d82 [ 47.728558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ecabdc000 [ 47.729418] RBP: 00007f8ecabdc000 R08: 0000000000000009 R09: 0000000000001000 [ 47.730265] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557298484ec0 [ 47.731124] R13: 00007fffc7c554d0 R14: 00007fffc7c55500 R15: 00007fffc7c55860 [ 47.731993] [ 47.732286] [ 47.732503] Allocated by task 213: [ 47.732936] kasan_save_stack+0x22/0x50 [ 47.733445] kasan_set_track+0x25/0x30 [ 47.733944] __kasan_slab_alloc+0x59/0x70 [ 47.734464] kmem_cache_alloc+0x16b/0x370 [ 47.734992] vm_area_dup+0x20/0x160 [ 47.735451] __split_vma+0x170/0x950 [ 47.735922] split_vma+0xc6/0x110 [ 47.736361] mprotect_fixup+0x8d2/0xb30 [ 47.736865] do_mprotect_pkey+0x87e/0xd40 [ 47.737398] __x64_sys_mprotect+0x78/0xc0 [ 47.737921] do_syscall_64+0x3f/0x90 [ 47.738402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.739072] [ 47.739288] Freed by task 213: [ 47.739691] kasan_save_stack+0x22/0x50 [ 47.740201] kasan_set_track+0x25/0x30 [ 47.740702] kasan_save_free_info+0x2b/0x50 [ 47.741237] __kasan_slab_free+0x10a/0x190 [ 47.741772] kmem_cache_free+0x10d/0x4d0 [ 47.742282] rcu_core+0x8c8/0x2860 [ 47.742748] __do_softirq+0x1b7/0x7d4 [ 47.743227] [ 47.743445] Last potentially related work creation: [ 47.744037] kasan_save_stack+0x22/0x50 [ 47.744546] __kasan_record_aux_stack+0x8e/0xa0 [ 47.745138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.745789] remove_vma+0x139/0x170 [ 47.746245] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.746821] do_vmi_munmap+0x1f1/0x2b0 [ 47.747304] __vm_munmap+0x138/0x3a0 [ 47.747765] __x64_sys_munmap+0x59/0x80 [ 47.748258] do_syscall_64+0x3f/0x90 [ 47.748734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.749377] [ 47.749591] The buggy address belongs to the object at ffff888019e0ee80 [ 47.749591] which belongs to the cache vm_area_struct of size 168 [ 47.751070] The buggy address is located 88 bytes inside of [ 47.751070] freed 168-byte region [ffff888019e0ee80, ffff888019e0ef28) [ 47.752474] [ 47.752691] The buggy address belongs to the physical page: [ 47.753355] page:00000000170bee79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e0e [ 47.754451] memcg:ffff88800de70d01 [ 47.754886] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.755535] page_type: 0xffffffff() [ 47.755984] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 47.756890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de70d01 [ 47.757790] page dumped because: kasan: bad access detected [ 47.758448] [ 47.758674] Memory state around the buggy address: [ 47.759253] ffff888019e0ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.760109] ffff888019e0ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.760968] >ffff888019e0ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.761820] ^ [ 47.762547] ffff888019e0ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.763413] ffff888019e0ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.764259] ================================================================== [ 47.765264] Disabling lock debugging due to kernel taint [ 50.084182] BUG: Bad rss-counter state mm:000000001e18bf37 type:MM_FILEPAGES val:33 [ 50.085786] BUG: Bad rss-counter state mm:000000001e18bf37 type:MM_ANONPAGES val:22 [ 50.579597] BUG: Bad rss-counter state mm:000000009f74ce5b type:MM_FILEPAGES val:33 [ 50.581007] BUG: Bad rss-counter state mm:000000009f74ce5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50944' (ECDSA) to the list of known hosts. 2023/06/19 18:00:10 fuzzer started 2023/06/19 18:00:10 dialing manager at localhost:44161 2023/06/19 18:00:10 checking machine... 2023/06/19 18:00:10 checking revisions... [ 51.316336] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:00:10 testing simple program... [ 51.355965] cgroup: Unknown subsys name 'net' [ 51.392376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff88800fc40000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801461f470 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=1ffff110028c3f1d RIP=ffffffff814c0388 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 00007f75dd236700 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=00007f215f993440 CR3=0000000008f74000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030313a3030 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303030 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f19e7496618 CR3=0000000008f74000 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=2030313a30303a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000