syzkaller login: [ 30.302949] BUG: Bad rss-counter state mm:00000000e2098a86 type:MM_FILEPAGES val:33 [ 30.304092] BUG: Bad rss-counter state mm:00000000e2098a86 type:MM_ANONPAGES val:22 [ 30.346606] ================================================================== [ 30.347648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.348682] Read of size 8 at addr ffff888009a76310 by task sshd/219 [ 30.349588] [ 30.349862] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.350774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.351746] Call Trace: [ 30.352074] [ 30.352370] dump_stack_lvl+0x91/0xf0 [ 30.352857] print_report+0xcc/0x620 [ 30.353331] ? __virt_addr_valid+0x102/0x340 [ 30.353881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.354491] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355101] kasan_report+0xbe/0xf0 [ 30.355573] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356200] vma_interval_tree_remove+0xc75/0xec0 [ 30.356803] vma_prepare+0xc54/0x11a0 [ 30.357279] __split_vma+0x5af/0x950 [ 30.357754] ? __pfx___split_vma+0x10/0x10 [ 30.358284] ? find_held_lock+0x2c/0x110 [ 30.358804] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.359372] ? lock_is_held_type+0x9f/0x120 [ 30.359911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.360530] ? mtree_range_walk+0x632/0x900 [ 30.361079] ? mas_walk+0x5c7/0x7c0 [ 30.361557] do_vmi_munmap+0x1f1/0x2b0 [ 30.362041] mmap_region+0x1f9/0x2660 [ 30.362524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.363035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.363741] ? __pfx_lock_acquire+0x10/0x10 [ 30.364279] ? __pfx_mmap_region+0x10/0x10 [ 30.364809] ? security_mmap_addr+0x7d/0xa0 [ 30.365338] ? get_unmapped_area+0x1f5/0x3f0 [ 30.365882] do_mmap+0x854/0xf00 [ 30.366319] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.366812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.367370] ksys_mmap_pgoff+0x3af/0x500 [ 30.367875] do_syscall_64+0x3f/0x90 [ 30.368364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369016] RIP: 0033:0x7f3d8e0dad82 [ 30.369477] 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 [ 30.371604] RSP: 002b:00007ffceb662978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.372528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d8e0dad82 [ 30.373375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d8d514000 [ 30.374219] RBP: 00007f3d8d514000 R08: 0000000000000009 R09: 0000000000001000 [ 30.375066] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d554623ec0 [ 30.375912] R13: 00007ffceb662990 R14: 00007ffceb6629c0 R15: 00007ffceb662d20 [ 30.376777] [ 30.377073] [ 30.377295] Allocated by task 212: [ 30.377726] kasan_save_stack+0x22/0x50 [ 30.378230] kasan_set_track+0x25/0x30 [ 30.378728] __kasan_slab_alloc+0x59/0x70 [ 30.379249] kmem_cache_alloc+0x16b/0x370 [ 30.379767] vm_area_dup+0x20/0x160 [ 30.380254] __split_vma+0x170/0x950 [ 30.380742] split_vma+0xc6/0x110 [ 30.381195] mprotect_fixup+0x8d2/0xb30 [ 30.381700] do_mprotect_pkey+0x87e/0xd40 [ 30.382228] __x64_sys_mprotect+0x78/0xc0 [ 30.382747] do_syscall_64+0x3f/0x90 [ 30.383229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383880] [ 30.384109] Freed by task 212: [ 30.384506] kasan_save_stack+0x22/0x50 [ 30.385008] kasan_set_track+0x25/0x30 [ 30.385500] kasan_save_free_info+0x2b/0x50 [ 30.386038] __kasan_slab_free+0x10a/0x190 [ 30.386571] kmem_cache_free+0x10d/0x4d0 [ 30.387085] rcu_core+0x8c8/0x2860 [ 30.387538] __do_softirq+0x1b7/0x7d4 [ 30.388024] [ 30.388250] Last potentially related work creation: [ 30.388832] kasan_save_stack+0x22/0x50 [ 30.389333] __kasan_record_aux_stack+0x8e/0xa0 [ 30.389908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.390548] remove_vma+0x139/0x170 [ 30.391003] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.391617] do_vmi_munmap+0x1f1/0x2b0 [ 30.392109] __vm_munmap+0x138/0x3a0 [ 30.392574] __x64_sys_munmap+0x59/0x80 [ 30.393073] do_syscall_64+0x3f/0x90 [ 30.393548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.394189] [ 30.394402] The buggy address belongs to the object at ffff888009a762b8 [ 30.394402] which belongs to the cache vm_area_struct of size 168 [ 30.395865] The buggy address is located 88 bytes inside of [ 30.395865] freed 168-byte region [ffff888009a762b8, ffff888009a76360) [ 30.397267] [ 30.397483] The buggy address belongs to the physical page: [ 30.398137] page:000000006862652e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a76 [ 30.399212] memcg:ffff88800f437c01 [ 30.399637] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.400301] page_type: 0xffffffff() [ 30.400752] raw: 0100000000000200 ffff8880087a0c80 ffffea0000397840 dead000000000002 [ 30.401669] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f437c01 [ 30.402571] page dumped because: kasan: bad access detected [ 30.403234] [ 30.403448] Memory state around the buggy address: [ 30.404030] ffff888009a76200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.404892] ffff888009a76280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.405739] >ffff888009a76300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.406588] ^ [ 30.407064] ffff888009a76380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.407912] ffff888009a76400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.408764] ================================================================== [ 30.409692] Disabling lock debugging due to kernel taint [ 33.527098] BUG: Bad rss-counter state mm:000000008f686588 type:MM_FILEPAGES val:33 [ 33.528279] BUG: Bad rss-counter state mm:000000008f686588 type:MM_ANONPAGES val:22 [ 33.957184] BUG: Bad rss-counter state mm:00000000cf0cb886 type:MM_FILEPAGES val:33 [ 33.958368] BUG: Bad rss-counter state mm:00000000cf0cb886 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61307' (ECDSA) to the list of known hosts. 2023/06/20 18:36:41 fuzzer started 2023/06/20 18:36:41 dialing manager at localhost:36067 2023/06/20 18:36:41 checking machine... 2023/06/20 18:36:41 checking revisions... [ 34.733331] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:36:41 testing simple program... [ 34.772783] cgroup: Unknown subsys name 'net' [ 34.810411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:41 Registers: info registers vcpu 0 RAX=1ffff1100d9e74a8 RBX=ffff88806cf3a540 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff8216b1d1 RDI=ffff888008d91b78 RBP=0000000000000000 RSP=ffff88806ce09c80 R8 =0000000000000001 R9 =1ffffffff0a58f20 R10=ffff888008d91f27 R11=1ffff1100d9c7479 R12=ffff888008d91b78 R13=1ffff1100d9c1392 R14=ffff888008d91b78 R15=0000000000000000 RIP=ffffffff8216b1e9 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 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=00007ffd7a382bd8 CR3=000000000ed50000 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=2031343a36333a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36333a3831203032 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7b03 RBX=ffffffff85dbd818 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88801a3af8a8 R8 =ffffffff860d8256 R9 =ffff88801a3af9a0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd838 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f5a6d88c900 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=00007f5a6de43618 CR3=000000000e19e000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000