syzkaller login: [ 30.600438] BUG: Bad rss-counter state mm:00000000d61b7e88 type:MM_FILEPAGES val:33 [ 30.601457] BUG: Bad rss-counter state mm:00000000d61b7e88 type:MM_ANONPAGES val:22 [ 30.774018] ================================================================== [ 30.775109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776345] Read of size 8 at addr ffff888018290b38 by task sshd/220 [ 30.777270] [ 30.777494] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779353] Call Trace: [ 30.779673] [ 30.779955] dump_stack_lvl+0x91/0xf0 [ 30.780464] print_report+0xcc/0x620 [ 30.780949] ? __virt_addr_valid+0x102/0x340 [ 30.781510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782140] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782761] kasan_report+0xbe/0xf0 [ 30.783247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783893] vma_interval_tree_remove+0xc75/0xec0 [ 30.784514] vma_prepare+0xc54/0x11a0 [ 30.785015] __split_vma+0x5af/0x950 [ 30.785545] ? __pfx___split_vma+0x10/0x10 [ 30.786171] ? find_held_lock+0x2c/0x110 [ 30.786727] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787289] ? lock_is_held_type+0x9f/0x120 [ 30.787812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788390] ? mtree_range_walk+0x632/0x900 [ 30.788924] ? mas_walk+0x5c7/0x7c0 [ 30.789389] do_vmi_munmap+0x1f1/0x2b0 [ 30.789860] mmap_region+0x1f9/0x2660 [ 30.790329] ? __pfx_mmap_region+0x10/0x10 [ 30.790832] ? security_mmap_addr+0x7d/0xa0 [ 30.791339] ? get_unmapped_area+0x1f5/0x3f0 [ 30.791861] do_mmap+0x854/0xf00 [ 30.792280] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.793315] ksys_mmap_pgoff+0x3af/0x500 [ 30.793801] do_syscall_64+0x3f/0x90 [ 30.794260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794880] RIP: 0033:0x7efdee291d82 [ 30.795313] 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 [ 30.797333] RSP: 002b:00007ffd0d6a00f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdee291d82 [ 30.799101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efded6cb000 [ 30.799961] RBP: 00007efded6cb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.800802] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6678f0ec0 [ 30.801637] R13: 00007ffd0d6a0110 R14: 00007ffd0d6a0140 R15: 00007ffd0d6a04a0 [ 30.802476] [ 30.802759] [ 30.802967] Allocated by task 213: [ 30.803386] kasan_save_stack+0x22/0x50 [ 30.803874] kasan_set_track+0x25/0x30 [ 30.804362] __kasan_slab_alloc+0x59/0x70 [ 30.804876] kmem_cache_alloc+0x16b/0x370 [ 30.805399] vm_area_dup+0x20/0x160 [ 30.805843] __split_vma+0x170/0x950 [ 30.806288] split_vma+0xc6/0x110 [ 30.806712] mprotect_fixup+0x8d2/0xb30 [ 30.807206] do_mprotect_pkey+0x87e/0xd40 [ 30.807719] __x64_sys_mprotect+0x78/0xc0 [ 30.808229] do_syscall_64+0x3f/0x90 [ 30.808698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809341] [ 30.809547] Freed by task 13: [ 30.809924] kasan_save_stack+0x22/0x50 [ 30.810416] kasan_set_track+0x25/0x30 [ 30.810910] kasan_save_free_info+0x2b/0x50 [ 30.811427] __kasan_slab_free+0x10a/0x190 [ 30.811953] kmem_cache_free+0x10d/0x4d0 [ 30.812451] rcu_core+0x8c8/0x2860 [ 30.812878] __do_softirq+0x1b7/0x7d4 [ 30.813363] [ 30.813575] Last potentially related work creation: [ 30.814140] kasan_save_stack+0x22/0x50 [ 30.814629] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815184] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815812] remove_vma+0x139/0x170 [ 30.816259] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.816793] do_vmi_munmap+0x1f1/0x2b0 [ 30.817268] __vm_munmap+0x138/0x3a0 [ 30.817723] __x64_sys_munmap+0x59/0x80 [ 30.818193] do_syscall_64+0x3f/0x90 [ 30.818646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819248] [ 30.819453] The buggy address belongs to the object at ffff888018290ae0 [ 30.819453] which belongs to the cache vm_area_struct of size 168 [ 30.820829] The buggy address is located 88 bytes inside of [ 30.820829] freed 168-byte region [ffff888018290ae0, ffff888018290b88) [ 30.822158] [ 30.822365] The buggy address belongs to the physical page: [ 30.822986] page:00000000e2f5afb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18290 [ 30.824003] memcg:ffff888018294201 [ 30.824404] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.825011] page_type: 0xffffffff() [ 30.825460] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.826321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018294201 [ 30.827191] page dumped because: kasan: bad access detected [ 30.827832] [ 30.828049] Memory state around the buggy address: [ 30.828612] ffff888018290a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.829457] ffff888018290a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.830282] >ffff888018290b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.831088] ^ [ 30.831671] ffff888018290b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.832476] ffff888018290c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.833286] ================================================================== [ 30.834201] Disabling lock debugging due to kernel taint [ 33.229772] BUG: Bad rss-counter state mm:00000000b80238b8 type:MM_FILEPAGES val:33 [ 33.230939] BUG: Bad rss-counter state mm:00000000b80238b8 type:MM_ANONPAGES val:22 [ 33.610340] BUG: Bad rss-counter state mm:0000000067a53694 type:MM_FILEPAGES val:33 [ 33.611107] BUG: Bad rss-counter state mm:0000000067a53694 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20942' (ECDSA) to the list of known hosts. 2023/06/21 05:23:44 fuzzer started 2023/06/21 05:23:44 dialing manager at localhost:36067 2023/06/21 05:23:44 checking machine... 2023/06/21 05:23:44 checking revisions... [ 34.224729] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:23:44 testing simple program... [ 34.276739] cgroup: Unknown subsys name 'net' [ 34.313843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880198ef060 RCX=ffffffff86138e01 RDX=1ffff1100331de1c RSI=ffffffff8180ce89 RDI=ffff8880198ef06c RBP=ffff8880198ef0e0 RSP=ffff8880198eef78 R8 =ffffffff86138eb4 R9 =ffff8880198eefd8 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880198ef060 R13=0000000000000000 R14=ffff888018059b40 R15=0000000000092800 RIP=ffffffff813ad549 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 00007f3189cea900 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=00007f3189caf008 CR3=000000000ef9a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007faf97c90480 CR3=000000000685c000 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=2034343a33323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a33323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000