syzkaller login: [ 30.629645] sshd (213) used greatest stack depth: 24128 bytes left [ 30.632081] BUG: Bad rss-counter state mm:000000001002fa76 type:MM_FILEPAGES val:33 [ 30.634015] BUG: Bad rss-counter state mm:000000001002fa76 type:MM_ANONPAGES val:22 [ 30.792639] ================================================================== [ 30.793619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.794562] Read of size 8 at addr ffff88801a2a6880 by task sshd/220 [ 30.795351] [ 30.795643] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.796556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.797580] Call Trace: [ 30.797917] [ 30.798207] dump_stack_lvl+0x91/0xf0 [ 30.798718] print_report+0xcc/0x620 [ 30.799205] ? __virt_addr_valid+0x102/0x340 [ 30.799763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.800386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.801017] kasan_report+0xbe/0xf0 [ 30.801527] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.802175] vma_interval_tree_remove+0xc75/0xec0 [ 30.802791] vma_prepare+0xc54/0x11a0 [ 30.803267] __split_vma+0x5af/0x950 [ 30.803749] ? __pfx___split_vma+0x10/0x10 [ 30.804280] ? find_held_lock+0x2c/0x110 [ 30.804822] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.805395] ? lock_is_held_type+0x9f/0x120 [ 30.805963] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.806590] ? mtree_range_walk+0x632/0x900 [ 30.807156] ? mas_walk+0x5c7/0x7c0 [ 30.807644] do_vmi_munmap+0x1f1/0x2b0 [ 30.808138] mmap_region+0x1f9/0x2660 [ 30.808630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.809149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.809890] ? __pfx_lock_acquire+0x10/0x10 [ 30.810423] ? __pfx_mmap_region+0x10/0x10 [ 30.810966] ? security_mmap_addr+0x7d/0xa0 [ 30.811497] ? get_unmapped_area+0x1f5/0x3f0 [ 30.812077] do_mmap+0x854/0xf00 [ 30.812518] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.813034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.813636] ksys_mmap_pgoff+0x3af/0x500 [ 30.814147] do_syscall_64+0x3f/0x90 [ 30.814643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815292] RIP: 0033:0x7f9d03735d82 [ 30.815776] 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 [ 30.817929] RSP: 002b:00007ffcc890c698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.818850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d03735d82 [ 30.819720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d02b6f000 [ 30.820577] RBP: 00007f9d02b6f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.821444] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593c5d93ec0 [ 30.822319] R13: 00007ffcc890c6b0 R14: 00007ffcc890c6e0 R15: 00007ffcc890ca40 [ 30.823183] [ 30.823479] [ 30.823721] Allocated by task 213: [ 30.824154] kasan_save_stack+0x22/0x50 [ 30.824670] kasan_set_track+0x25/0x30 [ 30.825162] __kasan_slab_alloc+0x59/0x70 [ 30.825718] kmem_cache_alloc+0x16b/0x370 [ 30.826237] vm_area_dup+0x20/0x160 [ 30.826709] __split_vma+0x170/0x950 [ 30.827180] split_vma+0xc6/0x110 [ 30.827626] mprotect_fixup+0x8d2/0xb30 [ 30.828127] do_mprotect_pkey+0x87e/0xd40 [ 30.828679] __x64_sys_mprotect+0x78/0xc0 [ 30.829200] do_syscall_64+0x3f/0x90 [ 30.829707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830349] [ 30.830573] Freed by task 213: [ 30.830968] kasan_save_stack+0x22/0x50 [ 30.831470] kasan_set_track+0x25/0x30 [ 30.832029] kasan_save_free_info+0x2b/0x50 [ 30.832757] __kasan_slab_free+0x10a/0x190 [ 30.833507] kmem_cache_free+0x10d/0x4d0 [ 30.834197] rcu_core+0x8c8/0x2860 [ 30.834805] __do_softirq+0x1b7/0x7d4 [ 30.835439] [ 30.835726] Last potentially related work creation: [ 30.836520] kasan_save_stack+0x22/0x50 [ 30.837158] __kasan_record_aux_stack+0x8e/0xa0 [ 30.837776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.838426] remove_vma+0x139/0x170 [ 30.838895] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.839454] do_vmi_munmap+0x1f1/0x2b0 [ 30.839970] __vm_munmap+0x138/0x3a0 [ 30.840435] __x64_sys_munmap+0x59/0x80 [ 30.840945] do_syscall_64+0x3f/0x90 [ 30.841451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842106] [ 30.842324] The buggy address belongs to the object at ffff88801a2a6828 [ 30.842324] which belongs to the cache vm_area_struct of size 168 [ 30.843823] The buggy address is located 88 bytes inside of [ 30.843823] freed 168-byte region [ffff88801a2a6828, ffff88801a2a68d0) [ 30.845254] [ 30.845479] The buggy address belongs to the physical page: [ 30.846158] page:00000000e3a8574a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a6 [ 30.847280] memcg:ffff88800cc20701 [ 30.847725] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.848373] page_type: 0xffffffff() [ 30.848851] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.849804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc20701 [ 30.850722] page dumped because: kasan: bad access detected [ 30.851386] [ 30.851619] Memory state around the buggy address: [ 30.852216] ffff88801a2a6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.853085] ffff88801a2a6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.854004] >ffff88801a2a6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.854871] ^ [ 30.855283] ffff88801a2a6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.856159] ffff88801a2a6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.857022] ================================================================== [ 30.857973] Disabling lock debugging due to kernel taint [ 33.043352] BUG: Bad rss-counter state mm:00000000a46c384b type:MM_FILEPAGES val:33 [ 33.044333] BUG: Bad rss-counter state mm:00000000a46c384b type:MM_ANONPAGES val:22 [ 33.617878] BUG: Bad rss-counter state mm:00000000341b6219 type:MM_FILEPAGES val:33 [ 33.619261] BUG: Bad rss-counter state mm:00000000341b6219 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64336' (ECDSA) to the list of known hosts. 2023/06/20 18:20:41 fuzzer started 2023/06/20 18:20:41 dialing manager at localhost:36067 2023/06/20 18:20:41 checking machine... 2023/06/20 18:20:41 checking revisions... [ 34.268107] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:20:42 testing simple program... [ 34.311412] cgroup: Unknown subsys name 'net' [ 34.356682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d2fdc RDX=1ffff110011b3f3c RSI=1ffff110011b3f3a RDI=ffff888008d9f9e0 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff860d2fe0 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=000000000000fdcc R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fe60 R15=ffff888008d9f978 RIP=ffffffff811310f5 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 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=00007faed808701c CR3=0000000014622000 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=30323a3831203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031343a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343939 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007ff422807560 CR3=000000000d8aa000 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=26a1913ee5af60b39b40a35856b44e69 XMM02=ec2efd57dc4c00df000000000011a588 XMM03=07206f7dc9be9171000000000011a658 XMM04=470cb189afdf56e700000000000ae988 XMM05=a126f0c9dc1bec170000000000132328 XMM06=4fda316b135da52b0000000000131d20 XMM07=e042d86d42eb936e0000000000122140 XMM08=07206f7dc9be9171000000000011a658 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000