syzkaller login: [ 31.301856] BUG: Bad rss-counter state mm:00000000338f125e type:MM_FILEPAGES val:33 [ 31.303080] BUG: Bad rss-counter state mm:00000000338f125e type:MM_ANONPAGES val:22 [ 31.339894] ================================================================== [ 31.340811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.341920] Read of size 8 at addr ffff8880182a7ed8 by task sshd/220 [ 31.342695] [ 31.342913] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.343781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.344786] Call Trace: [ 31.345107] [ 31.345392] dump_stack_lvl+0x91/0xf0 [ 31.345888] print_report+0xcc/0x620 [ 31.346373] ? __virt_addr_valid+0x102/0x340 [ 31.346947] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347571] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348184] kasan_report+0xbe/0xf0 [ 31.348668] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349299] vma_interval_tree_remove+0xc75/0xec0 [ 31.349911] vma_prepare+0xc54/0x11a0 [ 31.350397] __split_vma+0x5af/0x950 [ 31.350877] ? __pfx___split_vma+0x10/0x10 [ 31.351408] ? find_held_lock+0x2c/0x110 [ 31.351932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352511] ? lock_is_held_type+0x9f/0x120 [ 31.353066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.353687] ? mtree_range_walk+0x632/0x900 [ 31.354251] ? mas_walk+0x5c7/0x7c0 [ 31.354759] do_vmi_munmap+0x1f1/0x2b0 [ 31.355260] mmap_region+0x1f9/0x2660 [ 31.355750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.356982] ? __pfx_lock_acquire+0x10/0x10 [ 31.357530] ? __pfx_mmap_region+0x10/0x10 [ 31.358070] ? security_mmap_addr+0x7d/0xa0 [ 31.358619] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359175] do_mmap+0x854/0xf00 [ 31.359621] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360688] ksys_mmap_pgoff+0x3af/0x500 [ 31.361206] do_syscall_64+0x3f/0x90 [ 31.361698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362353] RIP: 0033:0x7f02342edd82 [ 31.362831] 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 [ 31.364996] RSP: 002b:00007ffc90328948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02342edd82 [ 31.366795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0233727000 [ 31.367658] RBP: 00007f0233727000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368526] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcd84fdec0 [ 31.369388] R13: 00007ffc90328960 R14: 00007ffc90328990 R15: 00007ffc90328cf0 [ 31.370262] [ 31.370563] [ 31.370789] Allocated by task 213: [ 31.371228] kasan_save_stack+0x22/0x50 [ 31.371743] kasan_set_track+0x25/0x30 [ 31.372248] __kasan_slab_alloc+0x59/0x70 [ 31.372776] kmem_cache_alloc+0x16b/0x370 [ 31.373304] vm_area_dup+0x20/0x160 [ 31.373760] __split_vma+0x170/0x950 [ 31.374236] split_vma+0xc6/0x110 [ 31.374694] mprotect_fixup+0x8d2/0xb30 [ 31.375202] do_mprotect_pkey+0x87e/0xd40 [ 31.375734] __x64_sys_mprotect+0x78/0xc0 [ 31.376267] do_syscall_64+0x3f/0x90 [ 31.376748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377393] [ 31.377608] Freed by task 19: [ 31.377997] kasan_save_stack+0x22/0x50 [ 31.378506] kasan_set_track+0x25/0x30 [ 31.379040] kasan_save_free_info+0x2b/0x50 [ 31.379585] __kasan_slab_free+0x10a/0x190 [ 31.380123] kmem_cache_free+0x10d/0x4d0 [ 31.380632] rcu_core+0x8c8/0x2860 [ 31.381082] __do_softirq+0x1b7/0x7d4 [ 31.381567] [ 31.381783] Last potentially related work creation: [ 31.382370] kasan_save_stack+0x22/0x50 [ 31.382888] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384133] remove_vma+0x139/0x170 [ 31.384588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385158] do_vmi_munmap+0x1f1/0x2b0 [ 31.385654] __vm_munmap+0x138/0x3a0 [ 31.386127] __x64_sys_munmap+0x59/0x80 [ 31.386658] do_syscall_64+0x3f/0x90 [ 31.387142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387798] [ 31.388017] The buggy address belongs to the object at ffff8880182a7e80 [ 31.388017] which belongs to the cache vm_area_struct of size 168 [ 31.389517] The buggy address is located 88 bytes inside of [ 31.389517] freed 168-byte region [ffff8880182a7e80, ffff8880182a7f28) [ 31.390960] [ 31.391176] The buggy address belongs to the physical page: [ 31.391849] page:0000000032320570 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182a7 [ 31.392953] memcg:ffff88800f027f01 [ 31.393379] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.394046] page_type: 0xffffffff() [ 31.394509] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.395470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f027f01 [ 31.396391] page dumped because: kasan: bad access detected [ 31.397056] [ 31.397279] Memory state around the buggy address: [ 31.397874] ffff8880182a7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398751] ffff8880182a7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.399629] >ffff8880182a7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.400488] ^ [ 31.401223] ffff8880182a7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.402096] ffff8880182a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.402971] ================================================================== [ 31.404113] Disabling lock debugging due to kernel taint [ 33.385321] BUG: Bad rss-counter state mm:0000000005ea0983 type:MM_FILEPAGES val:33 [ 33.386639] BUG: Bad rss-counter state mm:0000000005ea0983 type:MM_ANONPAGES val:22 [ 33.753684] BUG: Bad rss-counter state mm:000000002bc0e935 type:MM_FILEPAGES val:33 [ 33.755302] BUG: Bad rss-counter state mm:000000002bc0e935 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10944' (ECDSA) to the list of known hosts. 2023/06/20 13:33:34 fuzzer started 2023/06/20 13:33:34 dialing manager at localhost:36067 2023/06/20 13:33:34 checking machine... 2023/06/20 13:33:34 checking revisions... [ 34.526574] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:33:34 testing simple program... [ 34.582746] cgroup: Unknown subsys name 'net' [ 34.635037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b4448 RDX=1ffff1100d9c135c RSI=1ffff1100d9c135a RDI=ffff88806ce09ae0 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff863b444c R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008abe0 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88801803ff40 R15=ffff88806ce09a78 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 00007faea6a3f700 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=00007f3cb3527550 CR3=000000000dfaa000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373336352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323733 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=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888019f17de8 RSI=ffff888019f17dc8 RDI=ffff888019f17978 RBP=ffff888019f17a10 RSP=ffff888019f17970 R8 =0000000000000001 R9 =ffff888019f179b8 R10=0000000000038001 R11=00000000000246c8 R12=ffff888019f17a40 R13=0000000000000000 R14=ffff8880165f3680 R15=0000000000000d40 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f9a9c470900 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=00007f9a9ca27618 CR3=000000000eb04000 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