syzkaller login: [ 92.570410] BUG: Bad rss-counter state mm:00000000970fb228 type:MM_FILEPAGES val:33 [ 92.571622] BUG: Bad rss-counter state mm:00000000970fb228 type:MM_ANONPAGES val:22 [ 92.719500] ================================================================== [ 92.720603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 92.721555] Read of size 8 at addr ffff888019e1b058 by task sshd/220 [ 92.722453] [ 92.722683] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 92.723704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 92.724716] Call Trace: [ 92.725058] [ 92.725345] dump_stack_lvl+0x91/0xf0 [ 92.725842] print_report+0xcc/0x620 [ 92.726331] ? __virt_addr_valid+0x102/0x340 [ 92.726881] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.727499] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.728143] kasan_report+0xbe/0xf0 [ 92.728620] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.729244] vma_interval_tree_remove+0xc75/0xec0 [ 92.729859] vma_prepare+0xc54/0x11a0 [ 92.730333] __split_vma+0x5af/0x950 [ 92.730803] ? __pfx___split_vma+0x10/0x10 [ 92.731332] ? find_held_lock+0x2c/0x110 [ 92.731872] do_vmi_align_munmap+0x2ba/0x11f0 [ 92.732435] ? lock_is_held_type+0x9f/0x120 [ 92.732983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 92.733585] ? mtree_range_walk+0x632/0x900 [ 92.734133] ? mas_walk+0x5c7/0x7c0 [ 92.734605] do_vmi_munmap+0x1f1/0x2b0 [ 92.735098] mmap_region+0x1f9/0x2660 [ 92.735577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 92.736103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 92.736815] ? __pfx_lock_acquire+0x10/0x10 [ 92.737347] ? __pfx_mmap_region+0x10/0x10 [ 92.737888] ? security_mmap_addr+0x7d/0xa0 [ 92.738421] ? get_unmapped_area+0x1f5/0x3f0 [ 92.738970] do_mmap+0x854/0xf00 [ 92.739414] vm_mmap_pgoff+0x1a6/0x3a0 [ 92.739931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 92.740491] ksys_mmap_pgoff+0x3af/0x500 [ 92.741003] do_syscall_64+0x3f/0x90 [ 92.741479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.742124] RIP: 0033:0x7f1e426d4d82 [ 92.742580] 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 [ 92.744715] RSP: 002b:00007fff86e29798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 92.745611] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e426d4d82 [ 92.746467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e41b0e000 [ 92.747319] RBP: 00007f1e41b0e000 R08: 0000000000000009 R09: 0000000000001000 [ 92.748175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4b6e1bb20 [ 92.749028] R13: 00007fff86e297b0 R14: 00007fff86e297e0 R15: 00007fff86e29b40 [ 92.749884] [ 92.750180] [ 92.750397] Allocated by task 213: [ 92.750833] kasan_save_stack+0x22/0x50 [ 92.751334] kasan_set_track+0x25/0x30 [ 92.751855] __kasan_slab_alloc+0x59/0x70 [ 92.752379] kmem_cache_alloc+0x16b/0x370 [ 92.752899] vm_area_dup+0x20/0x160 [ 92.753347] __split_vma+0x170/0x950 [ 92.753824] split_vma+0xc6/0x110 [ 92.754269] mprotect_fixup+0x8d2/0xb30 [ 92.754773] do_mprotect_pkey+0x87e/0xd40 [ 92.755296] __x64_sys_mprotect+0x78/0xc0 [ 92.755830] do_syscall_64+0x3f/0x90 [ 92.756301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.756938] [ 92.757154] Freed by task 213: [ 92.757543] kasan_save_stack+0x22/0x50 [ 92.758051] kasan_set_track+0x25/0x30 [ 92.758542] kasan_save_free_info+0x2b/0x50 [ 92.759083] __kasan_slab_free+0x10a/0x190 [ 92.759611] kmem_cache_free+0x10d/0x4d0 [ 92.760134] rcu_core+0x8c8/0x2860 [ 92.760582] __do_softirq+0x1b7/0x7d4 [ 92.761058] [ 92.761274] Last potentially related work creation: [ 92.761860] kasan_save_stack+0x22/0x50 [ 92.762367] __kasan_record_aux_stack+0x8e/0xa0 [ 92.762950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 92.763594] remove_vma+0x139/0x170 [ 92.764063] do_vmi_align_munmap+0xd4a/0x11f0 [ 92.764620] do_vmi_munmap+0x1f1/0x2b0 [ 92.765110] __vm_munmap+0x138/0x3a0 [ 92.765574] __x64_sys_munmap+0x59/0x80 [ 92.766080] do_syscall_64+0x3f/0x90 [ 92.766553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.767208] [ 92.767425] The buggy address belongs to the object at ffff888019e1b000 [ 92.767425] which belongs to the cache vm_area_struct of size 168 [ 92.768912] The buggy address is located 88 bytes inside of [ 92.768912] freed 168-byte region [ffff888019e1b000, ffff888019e1b0a8) [ 92.770325] [ 92.770547] The buggy address belongs to the physical page: [ 92.771211] page:000000009c0ff57b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e1b [ 92.772316] memcg:ffff88801992a101 [ 92.772742] flags: 0x100000000000200(slab|node=0|zone=1) [ 92.773401] page_type: 0xffffffff() [ 92.773851] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 92.774768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801992a101 [ 92.775665] page dumped because: kasan: bad access detected [ 92.776341] [ 92.776559] Memory state around the buggy address: [ 92.777143] ffff888019e1af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 92.777999] ffff888019e1af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.778865] >ffff888019e1b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.779717] ^ [ 92.780473] ffff888019e1b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 92.781323] ffff888019e1b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.782198] ================================================================== [ 92.783168] Disabling lock debugging due to kernel taint [ 95.435499] BUG: Bad rss-counter state mm:0000000040ec5ab4 type:MM_FILEPAGES val:33 [ 95.436696] BUG: Bad rss-counter state mm:0000000040ec5ab4 type:MM_ANONPAGES val:22 [ 95.912976] BUG: Bad rss-counter state mm:00000000b70ac311 type:MM_FILEPAGES val:33 [ 95.914147] BUG: Bad rss-counter state mm:00000000b70ac311 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17381' (ECDSA) to the list of known hosts. 2023/06/19 18:30:35 fuzzer started 2023/06/19 18:30:36 dialing manager at localhost:44161 2023/06/19 18:30:36 checking machine... 2023/06/19 18:30:36 checking revisions... [ 96.549803] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:30:36 testing simple program... [ 96.600155] cgroup: Unknown subsys name 'net' [ 96.651362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000101 RCX=ffffffff8189c95d RDX=ffff88800d8551c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880167d7c48 RSP=ffff8880167d7ab0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c07e0 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 00007fedccae7900 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=00007fedcd09f0b0 CR3=0000000019962000 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=2035333a30333a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a30333a3831203931 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f054392d5a0 CR3=000000000e5d0000 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=30333a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323137 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000