syzkaller login: [ 28.711553] BUG: Bad rss-counter state mm:00000000b443f872 type:MM_FILEPAGES val:33 [ 28.712868] BUG: Bad rss-counter state mm:00000000b443f872 type:MM_ANONPAGES val:22 [ 28.877878] ================================================================== [ 28.878812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.879749] Read of size 8 at addr ffff888010109058 by task sshd/220 [ 28.880535] [ 28.880751] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.881707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.882717] Call Trace: [ 28.883041] [ 28.883353] dump_stack_lvl+0x91/0xf0 [ 28.883843] print_report+0xcc/0x620 [ 28.884334] ? __virt_addr_valid+0x102/0x340 [ 28.884909] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885540] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886175] kasan_report+0xbe/0xf0 [ 28.886659] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887309] vma_interval_tree_remove+0xc75/0xec0 [ 28.887923] vma_prepare+0xc54/0x11a0 [ 28.888407] __split_vma+0x5af/0x950 [ 28.888885] ? __pfx___split_vma+0x10/0x10 [ 28.889420] ? find_held_lock+0x2c/0x110 [ 28.889954] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.890524] ? lock_is_held_type+0x9f/0x120 [ 28.891071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.891685] ? mtree_range_walk+0x632/0x900 [ 28.892246] ? mas_walk+0x5c7/0x7c0 [ 28.892724] do_vmi_munmap+0x1f1/0x2b0 [ 28.893231] mmap_region+0x1f9/0x2660 [ 28.893717] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.894257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.894972] ? __pfx_lock_acquire+0x10/0x10 [ 28.895505] ? __pfx_mmap_region+0x10/0x10 [ 28.896041] ? security_mmap_addr+0x7d/0xa0 [ 28.896570] ? get_unmapped_area+0x1f5/0x3f0 [ 28.897125] do_mmap+0x854/0xf00 [ 28.897564] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.898065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.898632] ksys_mmap_pgoff+0x3af/0x500 [ 28.899146] do_syscall_64+0x3f/0x90 [ 28.899626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900272] RIP: 0033:0x7f0622468d82 [ 28.900732] 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 [ 28.902852] RSP: 002b:00007fffbe33a7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.903759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0622468d82 [ 28.904632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06218a2000 [ 28.905519] RBP: 00007f06218a2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.906415] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602fc3b2ec0 [ 28.907277] R13: 00007fffbe33a7d0 R14: 00007fffbe33a800 R15: 00007fffbe33ab60 [ 28.908148] [ 28.908461] [ 28.908685] Allocated by task 213: [ 28.909140] kasan_save_stack+0x22/0x50 [ 28.909667] kasan_set_track+0x25/0x30 [ 28.910193] __kasan_slab_alloc+0x59/0x70 [ 28.910735] kmem_cache_alloc+0x16b/0x370 [ 28.911271] vm_area_dup+0x20/0x160 [ 28.911747] __split_vma+0x170/0x950 [ 28.912238] split_vma+0xc6/0x110 [ 28.912694] mprotect_fixup+0x8d2/0xb30 [ 28.913223] do_mprotect_pkey+0x87e/0xd40 [ 28.913767] __x64_sys_mprotect+0x78/0xc0 [ 28.914315] do_syscall_64+0x3f/0x90 [ 28.914804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915482] [ 28.915703] Freed by task 203: [ 28.916113] kasan_save_stack+0x22/0x50 [ 28.916639] kasan_set_track+0x25/0x30 [ 28.917156] kasan_save_free_info+0x2b/0x50 [ 28.917714] __kasan_slab_free+0x10a/0x190 [ 28.918286] kmem_cache_free+0x10d/0x4d0 [ 28.918814] rcu_core+0x8c8/0x2860 [ 28.919277] __do_softirq+0x1b7/0x7d4 [ 28.919771] [ 28.919992] Last potentially related work creation: [ 28.920600] kasan_save_stack+0x22/0x50 [ 28.921138] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.922419] remove_vma+0x139/0x170 [ 28.922887] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.923468] do_vmi_munmap+0x1f1/0x2b0 [ 28.923976] __vm_munmap+0x138/0x3a0 [ 28.924464] __x64_sys_munmap+0x59/0x80 [ 28.924990] do_syscall_64+0x3f/0x90 [ 28.925486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926175] [ 28.926395] The buggy address belongs to the object at ffff888010109000 [ 28.926395] which belongs to the cache vm_area_struct of size 168 [ 28.927935] The buggy address is located 88 bytes inside of [ 28.927935] freed 168-byte region [ffff888010109000, ffff8880101090a8) [ 28.929395] [ 28.929618] The buggy address belongs to the physical page: [ 28.930324] page:00000000bb1bd573 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10109 [ 28.931459] memcg:ffff888016856d01 [ 28.931903] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.932578] page_type: 0xffffffff() [ 28.933044] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.934018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016856d01 [ 28.934967] page dumped because: kasan: bad access detected [ 28.935656] [ 28.935878] Memory state around the buggy address: [ 28.936479] ffff888010108f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.937365] ffff888010108f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.938265] >ffff888010109000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.939152] ^ [ 28.939903] ffff888010109080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.940793] ffff888010109100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.941671] ================================================================== [ 28.942680] Disabling lock debugging due to kernel taint [ 30.914211] BUG: Bad rss-counter state mm:000000006ae435f6 type:MM_FILEPAGES val:33 [ 30.915418] BUG: Bad rss-counter state mm:000000006ae435f6 type:MM_ANONPAGES val:22 [ 31.336983] BUG: Bad rss-counter state mm:000000006d8a43f8 type:MM_FILEPAGES val:33 [ 31.338265] BUG: Bad rss-counter state mm:000000006d8a43f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21659' (ECDSA) to the list of known hosts. 2023/06/19 17:25:16 fuzzer started 2023/06/19 17:25:16 dialing manager at localhost:44161 2023/06/19 17:25:16 checking machine... 2023/06/19 17:25:16 checking revisions... [ 32.056607] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:25:16 testing simple program... [ 32.106224] cgroup: Unknown subsys name 'net' [ 32.144409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:25:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcb0d2f778 CR3=0000000017db2000 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=2035313a35323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d68f7 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801648f750 RSP=ffff88801648f688 R8 =ffffffff860d68fa R9 =ffff88801648f738 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801648f758 R13=ffff88801648f740 R14=ffff88801648f7a0 R15=ffff88801648f6f8 RIP=ffffffff81130b99 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 00007fc3a1108900 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=00007ffef4656000 CR3=000000000dc6a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000