syzkaller login: [ 30.587929] BUG: Bad rss-counter state mm:000000007b87d9c3 type:MM_FILEPAGES val:33 [ 30.589465] BUG: Bad rss-counter state mm:000000007b87d9c3 type:MM_ANONPAGES val:22 [ 30.762369] ================================================================== [ 30.763342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.764345] Read of size 8 at addr ffff888014537d08 by task sshd/221 [ 30.765180] [ 30.765418] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.766429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.767477] Call Trace: [ 30.767840] [ 30.768141] dump_stack_lvl+0x91/0xf0 [ 30.768664] print_report+0xcc/0x620 [ 30.769175] ? __virt_addr_valid+0x102/0x340 [ 30.769763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770426] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771323] kasan_report+0xbe/0xf0 [ 30.771909] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772647] vma_interval_tree_remove+0xc75/0xec0 [ 30.773365] vma_prepare+0xc54/0x11a0 [ 30.773934] __split_vma+0x5af/0x950 [ 30.774529] ? __pfx___split_vma+0x10/0x10 [ 30.775153] ? find_held_lock+0x2c/0x110 [ 30.775775] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.776439] ? lock_is_held_type+0x9f/0x120 [ 30.777081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.777788] ? mtree_range_walk+0x632/0x900 [ 30.778444] ? mas_walk+0x5c7/0x7c0 [ 30.779026] do_vmi_munmap+0x1f1/0x2b0 [ 30.779609] mmap_region+0x1f9/0x2660 [ 30.780188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781649] ? __pfx_lock_acquire+0x10/0x10 [ 30.782294] ? __pfx_mmap_region+0x10/0x10 [ 30.782952] ? security_mmap_addr+0x7d/0xa0 [ 30.783593] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784263] do_mmap+0x854/0xf00 [ 30.784792] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786076] ksys_mmap_pgoff+0x3af/0x500 [ 30.786717] do_syscall_64+0x3f/0x90 [ 30.787293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787693] RIP: 0033:0x7f047f88ad82 [ 30.787972] 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 [ 30.789300] RSP: 002b:00007fffa434eb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.789866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f047f88ad82 [ 30.790394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f047ecc4000 [ 30.790919] RBP: 00007f047ecc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.791435] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568c9f42d90 [ 30.791947] R13: 00007fffa434eb80 R14: 00007fffa434ebb0 R15: 00007fffa434ef10 [ 30.792480] [ 30.792659] [ 30.792790] Allocated by task 214: [ 30.793051] kasan_save_stack+0x22/0x50 [ 30.793363] kasan_set_track+0x25/0x30 [ 30.793661] __kasan_slab_alloc+0x59/0x70 [ 30.793989] kmem_cache_alloc+0x16b/0x370 [ 30.794302] vm_area_dup+0x20/0x160 [ 30.794577] __split_vma+0x170/0x950 [ 30.794869] split_vma+0xc6/0x110 [ 30.795141] mprotect_fixup+0x8d2/0xb30 [ 30.795453] do_mprotect_pkey+0x87e/0xd40 [ 30.795768] __x64_sys_mprotect+0x78/0xc0 [ 30.796085] do_syscall_64+0x3f/0x90 [ 30.796377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796769] [ 30.796899] Freed by task 214: [ 30.797139] kasan_save_stack+0x22/0x50 [ 30.797446] kasan_set_track+0x25/0x30 [ 30.797748] kasan_save_free_info+0x2b/0x50 [ 30.798075] __kasan_slab_free+0x10a/0x190 [ 30.798403] kmem_cache_free+0x10d/0x4d0 [ 30.798724] rcu_core+0x8c8/0x2860 [ 30.798998] __do_softirq+0x1b7/0x7d4 [ 30.799290] [ 30.799425] Last potentially related work creation: [ 30.799781] kasan_save_stack+0x22/0x50 [ 30.800086] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.800832] remove_vma+0x139/0x170 [ 30.801111] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.801451] do_vmi_munmap+0x1f1/0x2b0 [ 30.801747] __vm_munmap+0x138/0x3a0 [ 30.802035] __x64_sys_munmap+0x59/0x80 [ 30.802331] do_syscall_64+0x3f/0x90 [ 30.802621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803013] [ 30.803143] The buggy address belongs to the object at ffff888014537cb0 [ 30.803143] which belongs to the cache vm_area_struct of size 168 [ 30.804037] The buggy address is located 88 bytes inside of [ 30.804037] freed 168-byte region [ffff888014537cb0, ffff888014537d58) [ 30.804898] [ 30.805028] The buggy address belongs to the physical page: [ 30.805432] page:00000000044ea7c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14537 [ 30.806095] memcg:ffff888018cce801 [ 30.806352] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806748] page_type: 0xffffffff() [ 30.807018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.807579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cce801 [ 30.808118] page dumped because: kasan: bad access detected [ 30.808514] [ 30.808644] Memory state around the buggy address: [ 30.808998] ffff888014537c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.809520] ffff888014537c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.810044] >ffff888014537d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.810565] ^ [ 30.810834] ffff888014537d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.811352] ffff888014537e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.811857] ================================================================== [ 30.812515] Disabling lock debugging due to kernel taint [ 32.763010] BUG: Bad rss-counter state mm:00000000dd9f7a26 type:MM_FILEPAGES val:33 [ 32.764163] BUG: Bad rss-counter state mm:00000000dd9f7a26 type:MM_ANONPAGES val:22 [ 33.255737] BUG: Bad rss-counter state mm:000000004034c6bb type:MM_FILEPAGES val:33 [ 33.256905] BUG: Bad rss-counter state mm:000000004034c6bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23692' (ECDSA) to the list of known hosts. 2023/06/20 15:46:30 fuzzer started 2023/06/20 15:46:31 dialing manager at localhost:36067 2023/06/20 15:46:31 checking machine... 2023/06/20 15:46:31 checking revisions... [ 33.976748] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:46:31 testing simple program... [ 34.022573] cgroup: Unknown subsys name 'net' [ 34.057445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc2dbefdd8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007fd7f1ada51000005652588d4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800dac6d10 RCX=ffff88800dac6d10 RDX=00000000000d000d RSI=ffff88800dac6d10 RDI=ffff88800844f780 RBP=ffff88801650f908 RSP=ffff88801650f870 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea000036b180 R11=00000000800d000a R12=ffffea000036b180 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 00007fe4ad4ff700 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=00007fbc3a811930 CR3=0000000018c9a000 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=2030333a36343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a36343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000