syzkaller login: [ 30.548066] BUG: Bad rss-counter state mm:00000000a718b9a0 type:MM_FILEPAGES val:33 [ 30.549996] BUG: Bad rss-counter state mm:00000000a718b9a0 type:MM_ANONPAGES val:22 [ 30.713374] ================================================================== [ 30.714310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715190] Read of size 8 at addr ffff88800d069228 by task sshd/219 [ 30.715901] [ 30.716107] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.717035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.717954] Call Trace: [ 30.718257] [ 30.718527] dump_stack_lvl+0x91/0xf0 [ 30.719023] print_report+0xcc/0x620 [ 30.719482] ? __virt_addr_valid+0x102/0x340 [ 30.719999] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721181] kasan_report+0xbe/0xf0 [ 30.721632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722215] vma_interval_tree_remove+0xc75/0xec0 [ 30.722799] vma_prepare+0xc54/0x11a0 [ 30.723252] __split_vma+0x5af/0x950 [ 30.723697] ? __pfx___split_vma+0x10/0x10 [ 30.724208] ? find_held_lock+0x2c/0x110 [ 30.724735] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.725276] ? lock_is_held_type+0x9f/0x120 [ 30.725800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.726394] ? mtree_range_walk+0x632/0x900 [ 30.726934] ? mas_walk+0x5c7/0x7c0 [ 30.727400] do_vmi_munmap+0x1f1/0x2b0 [ 30.727884] mmap_region+0x1f9/0x2660 [ 30.728347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.728872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.729569] ? __pfx_lock_acquire+0x10/0x10 [ 30.730080] ? __pfx_mmap_region+0x10/0x10 [ 30.730586] ? security_mmap_addr+0x7d/0xa0 [ 30.731101] ? get_unmapped_area+0x1f5/0x3f0 [ 30.731635] do_mmap+0x854/0xf00 [ 30.732069] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.732565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.733120] ksys_mmap_pgoff+0x3af/0x500 [ 30.733613] do_syscall_64+0x3f/0x90 [ 30.734081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734712] RIP: 0033:0x7f951523fd82 [ 30.735162] 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 [ 30.737248] RSP: 002b:00007ffda8196128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.738137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f951523fd82 [ 30.738963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9514679000 [ 30.739786] RBP: 00007f9514679000 R08: 0000000000000009 R09: 0000000000001000 [ 30.740621] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc6ecf6ec0 [ 30.741482] R13: 00007ffda8196140 R14: 00007ffda8196170 R15: 00007ffda81964d0 [ 30.742317] [ 30.742599] [ 30.742814] Allocated by task 212: [ 30.743231] kasan_save_stack+0x22/0x50 [ 30.743722] kasan_set_track+0x25/0x30 [ 30.744206] __kasan_slab_alloc+0x59/0x70 [ 30.744738] kmem_cache_alloc+0x16b/0x370 [ 30.745239] vm_area_dup+0x20/0x160 [ 30.745682] __split_vma+0x170/0x950 [ 30.746136] split_vma+0xc6/0x110 [ 30.746566] mprotect_fixup+0x8d2/0xb30 [ 30.747060] do_mprotect_pkey+0x87e/0xd40 [ 30.747562] __x64_sys_mprotect+0x78/0xc0 [ 30.748073] do_syscall_64+0x3f/0x90 [ 30.748543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749154] [ 30.749363] Freed by task 212: [ 30.749736] kasan_save_stack+0x22/0x50 [ 30.750211] kasan_set_track+0x25/0x30 [ 30.750680] kasan_save_free_info+0x2b/0x50 [ 30.751182] __kasan_slab_free+0x10a/0x190 [ 30.751683] kmem_cache_free+0x10d/0x4d0 [ 30.752162] rcu_core+0x8c8/0x2860 [ 30.752587] __do_softirq+0x1b7/0x7d4 [ 30.753038] [ 30.753244] Last potentially related work creation: [ 30.753794] kasan_save_stack+0x22/0x50 [ 30.754272] __kasan_record_aux_stack+0x8e/0xa0 [ 30.754812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.755419] remove_vma+0x139/0x170 [ 30.755851] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.756378] do_vmi_munmap+0x1f1/0x2b0 [ 30.756861] __vm_munmap+0x138/0x3a0 [ 30.757301] __x64_sys_munmap+0x59/0x80 [ 30.757767] do_syscall_64+0x3f/0x90 [ 30.758217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758835] [ 30.759038] The buggy address belongs to the object at ffff88800d0691d0 [ 30.759038] which belongs to the cache vm_area_struct of size 168 [ 30.760414] The buggy address is located 88 bytes inside of [ 30.760414] freed 168-byte region [ffff88800d0691d0, ffff88800d069278) [ 30.761782] [ 30.761993] The buggy address belongs to the physical page: [ 30.762638] page:00000000e6042556 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd069 [ 30.763694] memcg:ffff88801803b501 [ 30.764109] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764755] page_type: 0xffffffff() [ 30.765188] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.766098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801803b501 [ 30.766978] page dumped because: kasan: bad access detected [ 30.767679] [ 30.767896] Memory state around the buggy address: [ 30.768487] ffff88800d069100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769370] ffff88800d069180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.770214] >ffff88800d069200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.771067] ^ [ 30.771628] ffff88800d069280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.772482] ffff88800d069300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.773337] ================================================================== [ 30.774648] Disabling lock debugging due to kernel taint [ 32.718264] BUG: Bad rss-counter state mm:000000003078d20d type:MM_FILEPAGES val:33 [ 32.719402] BUG: Bad rss-counter state mm:000000003078d20d type:MM_ANONPAGES val:22 [ 33.136457] BUG: Bad rss-counter state mm:00000000e07dc06b type:MM_FILEPAGES val:33 [ 33.137660] BUG: Bad rss-counter state mm:00000000e07dc06b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56690' (ECDSA) to the list of known hosts. 2023/06/20 22:40:18 fuzzer started 2023/06/20 22:40:18 dialing manager at localhost:36067 2023/06/20 22:40:18 checking machine... 2023/06/20 22:40:18 checking revisions... [ 33.777398] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:40:18 testing simple program... [ 33.833453] cgroup: Unknown subsys name 'net' [ 33.882832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:40:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000aca14a71 RCX=ffffffff8219d359 RDX=ffff88800ff80000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888016f77678 RSP=ffff888016f77548 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff849f2d80 R14=0000000000000000 R15=ffff888016f77674 RIP=ffffffff814c0438 RFL=00000256 [---ZAP-] 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 00007ffade564700 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=00007f74881a6650 CR3=000000000d082000 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=2037313a30343a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a30343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf42a70 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800d6ff6a0 RSP=ffff88800d6ff5e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888008fae000 R13=ffff88800db44b00 R14=0000000000000246 R15=ffff88806cf42a50 RIP=ffffffff81806e27 RFL=00000046 [---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 00007f8f7dbdf900 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=00007f8f7d0fd008 CR3=000000000d706000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9df2c3c6115007ee00000000000ae988 XMM05=06dfb7d32e8b27060000000000132d00 XMM06=806171799158d9670000000000131af0 XMM07=fb795ef6d65770560000000000121e38 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000