syzkaller login: [ 39.490041] BUG: Bad rss-counter state mm:00000000c835ae7c type:MM_FILEPAGES val:33 [ 39.491227] BUG: Bad rss-counter state mm:00000000c835ae7c type:MM_ANONPAGES val:22 [ 39.535807] ================================================================== [ 39.536993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.537992] Read of size 8 at addr ffff88800e0414e0 by task sshd/219 [ 39.538808] [ 39.539064] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.539987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.541036] Call Trace: [ 39.541378] [ 39.541684] dump_stack_lvl+0x91/0xf0 [ 39.542207] print_report+0xcc/0x620 [ 39.542724] ? __virt_addr_valid+0x102/0x340 [ 39.543317] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.543970] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.544644] kasan_report+0xbe/0xf0 [ 39.545150] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.545812] vma_interval_tree_remove+0xc75/0xec0 [ 39.546459] vma_prepare+0xc54/0x11a0 [ 39.546973] __split_vma+0x5af/0x950 [ 39.547476] ? __pfx___split_vma+0x10/0x10 [ 39.548038] ? find_held_lock+0x2c/0x110 [ 39.548613] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.549226] ? lock_is_held_type+0x9f/0x120 [ 39.549808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.550456] ? mtree_range_walk+0x632/0x900 [ 39.551050] ? mas_walk+0x5c7/0x7c0 [ 39.551560] do_vmi_munmap+0x1f1/0x2b0 [ 39.552087] mmap_region+0x1f9/0x2660 [ 39.552627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.553195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.553993] ? __pfx_lock_acquire+0x10/0x10 [ 39.554586] ? __pfx_mmap_region+0x10/0x10 [ 39.555173] ? security_mmap_addr+0x7d/0xa0 [ 39.555761] ? get_unmapped_area+0x1f5/0x3f0 [ 39.556370] do_mmap+0x854/0xf00 [ 39.556873] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.557423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.558045] ksys_mmap_pgoff+0x3af/0x500 [ 39.558611] do_syscall_64+0x3f/0x90 [ 39.559144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.559863] RIP: 0033:0x7f3b2df62d82 [ 39.560373] 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 [ 39.562763] RSP: 002b:00007ffcbaf69eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.563766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b2df62d82 [ 39.564714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b2d39c000 [ 39.565656] RBP: 00007f3b2d39c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.566595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563415decf70 [ 39.567533] R13: 00007ffcbaf69ed0 R14: 00007ffcbaf69f00 R15: 00007ffcbaf6a260 [ 39.568497] [ 39.568822] [ 39.569057] Allocated by task 212: [ 39.569525] kasan_save_stack+0x22/0x50 [ 39.570089] kasan_set_track+0x25/0x30 [ 39.570637] __kasan_slab_alloc+0x59/0x70 [ 39.571217] kmem_cache_alloc+0x16b/0x370 [ 39.571792] vm_area_dup+0x20/0x160 [ 39.572298] __split_vma+0x170/0x950 [ 39.572831] split_vma+0xc6/0x110 [ 39.573317] mprotect_fixup+0x8d2/0xb30 [ 39.573871] do_mprotect_pkey+0x87e/0xd40 [ 39.574450] __x64_sys_mprotect+0x78/0xc0 [ 39.575030] do_syscall_64+0x3f/0x90 [ 39.575554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.576266] [ 39.576535] Freed by task 19: [ 39.576962] kasan_save_stack+0x22/0x50 [ 39.577516] kasan_set_track+0x25/0x30 [ 39.578065] kasan_save_free_info+0x2b/0x50 [ 39.578654] __kasan_slab_free+0x10a/0x190 [ 39.579248] kmem_cache_free+0x10d/0x4d0 [ 39.579813] rcu_core+0x8c8/0x2860 [ 39.580306] __do_softirq+0x1b7/0x7d4 [ 39.580840] [ 39.581081] Last potentially related work creation: [ 39.581730] kasan_save_stack+0x22/0x50 [ 39.582289] __kasan_record_aux_stack+0x8e/0xa0 [ 39.582927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.583643] remove_vma+0x139/0x170 [ 39.584145] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.584766] do_vmi_munmap+0x1f1/0x2b0 [ 39.585310] __vm_munmap+0x138/0x3a0 [ 39.585830] __x64_sys_munmap+0x59/0x80 [ 39.586380] do_syscall_64+0x3f/0x90 [ 39.586911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.587622] [ 39.587860] The buggy address belongs to the object at ffff88800e041488 [ 39.587860] which belongs to the cache vm_area_struct of size 168 [ 39.589504] The buggy address is located 88 bytes inside of [ 39.589504] freed 168-byte region [ffff88800e041488, ffff88800e041530) [ 39.591062] [ 39.591301] The buggy address belongs to the physical page: [ 39.592033] page:000000007cd3d915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe041 [ 39.593240] memcg:ffff88800e308301 [ 39.593709] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.594429] page_type: 0xffffffff() [ 39.594927] raw: 0100000000000200 ffff88800879fc80 ffffea00003fe900 dead000000000002 [ 39.595968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e308301 [ 39.596992] page dumped because: kasan: bad access detected [ 39.597724] [ 39.597963] Memory state around the buggy address: [ 39.598603] ffff88800e041380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.599554] ffff88800e041400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.600509] >ffff88800e041480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.601458] ^ [ 39.602297] ffff88800e041500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.603264] ffff88800e041580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.604190] ================================================================== [ 39.605443] Disabling lock debugging due to kernel taint [ 41.048894] BUG: Bad rss-counter state mm:00000000d559dbae type:MM_FILEPAGES val:33 [ 41.050105] BUG: Bad rss-counter state mm:00000000d559dbae type:MM_ANONPAGES val:22 [ 41.554006] BUG: Bad rss-counter state mm:000000000760859f type:MM_FILEPAGES val:33 [ 41.555181] BUG: Bad rss-counter state mm:000000000760859f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5944' (ECDSA) to the list of known hosts. 2023/06/19 23:09:13 fuzzer started 2023/06/19 23:09:13 dialing manager at localhost:44161 2023/06/19 23:09:13 checking machine... 2023/06/19 23:09:13 checking revisions... [ 42.234141] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:09:13 testing simple program... [ 42.281914] cgroup: Unknown subsys name 'net' [ 42.327182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:09 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=00007fffbde71788 CR3=00000000194d0000 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=2032313a39303a3332203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a303039383420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813fc4c0 RCX=ffffffff813c03a6 RDX=ffff888014740000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf2ba08 RSP=ffff88806cf09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c07e4 RFL=00000002 [-------] 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 00007f62e0f5a900 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=00007f62e0479040 CR3=0000000008ed4000 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=39303a3332203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032313a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000