syzkaller login: [ 30.756802] BUG: Bad rss-counter state mm:00000000b33773b0 type:MM_FILEPAGES val:33 [ 30.758113] BUG: Bad rss-counter state mm:00000000b33773b0 type:MM_ANONPAGES val:22 [ 30.801756] ================================================================== [ 30.803053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.804188] Read of size 8 at addr ffff88800e3096b0 by task sshd/220 [ 30.805118] [ 30.805385] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.806433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.807622] Call Trace: [ 30.808013] [ 30.808345] dump_stack_lvl+0x91/0xf0 [ 30.808936] print_report+0xcc/0x620 [ 30.809618] ? __virt_addr_valid+0x102/0x340 [ 30.810187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810806] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811422] kasan_report+0xbe/0xf0 [ 30.811897] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812523] vma_interval_tree_remove+0xc75/0xec0 [ 30.813119] vma_prepare+0xc54/0x11a0 [ 30.813634] __split_vma+0x5af/0x950 [ 30.814106] ? __pfx___split_vma+0x10/0x10 [ 30.814630] ? find_held_lock+0x2c/0x110 [ 30.815147] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.815725] ? lock_is_held_type+0x9f/0x120 [ 30.816266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816875] ? mtree_range_walk+0x632/0x900 [ 30.817455] ? mas_walk+0x5c7/0x7c0 [ 30.817942] do_vmi_munmap+0x1f1/0x2b0 [ 30.818439] mmap_region+0x1f9/0x2660 [ 30.818919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.819435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.820153] ? __pfx_lock_acquire+0x10/0x10 [ 30.820684] ? __pfx_mmap_region+0x10/0x10 [ 30.821223] ? security_mmap_addr+0x7d/0xa0 [ 30.821746] ? get_unmapped_area+0x1f5/0x3f0 [ 30.822311] do_mmap+0x854/0xf00 [ 30.822749] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.823237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.823798] ksys_mmap_pgoff+0x3af/0x500 [ 30.824311] do_syscall_64+0x3f/0x90 [ 30.824794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825457] RIP: 0033:0x7faec045dd82 [ 30.825909] 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 [ 30.828022] RSP: 002b:00007ffe1d4b7cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.829051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faec045dd82 [ 30.829922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faebf897000 [ 30.830775] RBP: 00007faebf897000 R08: 0000000000000009 R09: 0000000000001000 [ 30.831621] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624d3ad4d90 [ 30.832510] R13: 00007ffe1d4b7cf0 R14: 00007ffe1d4b7d20 R15: 00007ffe1d4b8080 [ 30.833486] [ 30.833785] [ 30.834004] Allocated by task 213: [ 30.834434] kasan_save_stack+0x22/0x50 [ 30.834936] kasan_set_track+0x25/0x30 [ 30.835422] __kasan_slab_alloc+0x59/0x70 [ 30.835950] kmem_cache_alloc+0x16b/0x370 [ 30.836469] vm_area_dup+0x20/0x160 [ 30.836922] __split_vma+0x170/0x950 [ 30.837400] split_vma+0xc6/0x110 [ 30.837837] mprotect_fixup+0x8d2/0xb30 [ 30.838333] do_mprotect_pkey+0x87e/0xd40 [ 30.838857] __x64_sys_mprotect+0x78/0xc0 [ 30.839373] do_syscall_64+0x3f/0x90 [ 30.839848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840488] [ 30.840706] Freed by task 213: [ 30.841094] kasan_save_stack+0x22/0x50 [ 30.841607] kasan_set_track+0x25/0x30 [ 30.842104] kasan_save_free_info+0x2b/0x50 [ 30.842630] __kasan_slab_free+0x10a/0x190 [ 30.843180] kmem_cache_free+0x10d/0x4d0 [ 30.843702] rcu_core+0x8c8/0x2860 [ 30.844150] __do_softirq+0x1b7/0x7d4 [ 30.844641] [ 30.844858] Last potentially related work creation: [ 30.845460] kasan_save_stack+0x22/0x50 [ 30.845957] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.847180] remove_vma+0x139/0x170 [ 30.847634] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.848193] do_vmi_munmap+0x1f1/0x2b0 [ 30.848677] __vm_munmap+0x138/0x3a0 [ 30.849149] __x64_sys_munmap+0x59/0x80 [ 30.849666] do_syscall_64+0x3f/0x90 [ 30.850153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850796] [ 30.851014] The buggy address belongs to the object at ffff88800e309658 [ 30.851014] which belongs to the cache vm_area_struct of size 168 [ 30.852474] The buggy address is located 88 bytes inside of [ 30.852474] freed 168-byte region [ffff88800e309658, ffff88800e309700) [ 30.853888] [ 30.854103] The buggy address belongs to the physical page: [ 30.854766] page:000000005d6b58b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe309 [ 30.855847] memcg:ffff8880193bb501 [ 30.856269] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.856914] page_type: 0xffffffff() [ 30.857375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.858291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880193bb501 [ 30.859193] page dumped because: kasan: bad access detected [ 30.859857] [ 30.860070] Memory state around the buggy address: [ 30.860652] ffff88800e309580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.861522] ffff88800e309600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.862369] >ffff88800e309680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.863211] ^ [ 30.863800] ffff88800e309700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.864659] ffff88800e309780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.865526] ================================================================== [ 30.866649] Disabling lock debugging due to kernel taint [ 32.842497] BUG: Bad rss-counter state mm:00000000787a7ad2 type:MM_FILEPAGES val:33 [ 32.844077] BUG: Bad rss-counter state mm:00000000787a7ad2 type:MM_ANONPAGES val:22 [ 33.412367] BUG: Bad rss-counter state mm:000000009f5828e3 type:MM_FILEPAGES val:33 [ 33.413570] BUG: Bad rss-counter state mm:000000009f5828e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30958' (ECDSA) to the list of known hosts. 2023/06/21 07:47:09 fuzzer started 2023/06/21 07:47:09 dialing manager at localhost:36067 2023/06/21 07:47:09 checking machine... 2023/06/21 07:47:09 checking revisions... [ 34.064987] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:47:09 testing simple program... [ 34.113956] cgroup: Unknown subsys name 'net' [ 34.154323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:47:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=dffffc0000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000006 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=0000000000000002 RSP=ffff888008da7d68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8540f200 R13=0000000000000002 R14=ffff888008d91b40 R15=ffff888008da7dc0 RIP=ffffffff81365f3f 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 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=00007f7386d50000 CR3=0000000018654000 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=2039303a37343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a37343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880166bfd80 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000090 RDI=ffff88800fe27c00 RBP=0000000000000090 RSP=ffff8880166bfbe0 R8 =0000000000000007 R9 =000000007fffffff R10=0000000000000090 R11=00000000000b6a61 R12=ffff88800fe27c00 R13=ffff8880166bfd90 R14=0000000000000000 R15=ffff88800a106640 RIP=ffffffff8184ce10 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 00007f3d19a57900 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=00007ffc6d8bc000 CR3=000000000ecc0000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000