syzkaller login: [ 40.561977] BUG: Bad rss-counter state mm:00000000f8841df1 type:MM_FILEPAGES val:33 [ 40.562635] BUG: Bad rss-counter state mm:00000000f8841df1 type:MM_ANONPAGES val:22 [ 40.674241] ================================================================== [ 40.675008] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.675743] Read of size 8 at addr ffff88800f72aed8 by task sshd/227 [ 40.676336] [ 40.676506] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.677192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.678137] Call Trace: [ 40.678390] [ 40.678620] dump_stack_lvl+0x91/0xf0 [ 40.679014] print_report+0xcc/0x620 [ 40.679394] ? __virt_addr_valid+0x102/0x340 [ 40.679847] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.680709] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.681549] kasan_report+0xbe/0xf0 [ 40.682173] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.683006] vma_interval_tree_remove+0xc75/0xec0 [ 40.683812] vma_prepare+0xc54/0x11a0 [ 40.684454] __split_vma+0x5af/0x950 [ 40.685079] ? __pfx___split_vma+0x10/0x10 [ 40.685783] ? find_held_lock+0x2c/0x110 [ 40.686470] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.687232] ? lock_is_held_type+0x9f/0x120 [ 40.687944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.688754] ? mtree_range_walk+0x632/0x900 [ 40.689486] ? mas_walk+0x5c7/0x7c0 [ 40.690110] do_vmi_munmap+0x1f1/0x2b0 [ 40.690759] mmap_region+0x1f9/0x2660 [ 40.691422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.692055] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.692850] ? __pfx_lock_acquire+0x10/0x10 [ 40.693445] ? __pfx_mmap_region+0x10/0x10 [ 40.694039] ? security_mmap_addr+0x7d/0xa0 [ 40.694630] ? get_unmapped_area+0x1f5/0x3f0 [ 40.695261] do_mmap+0x854/0xf00 [ 40.695753] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.696304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.696941] ksys_mmap_pgoff+0x3af/0x500 [ 40.697517] do_syscall_64+0x3f/0x90 [ 40.698058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.698787] RIP: 0033:0x7fec32010d82 [ 40.699337] 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 [ 40.701737] RSP: 002b:00007ffc0fee8738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.702756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec32010d82 [ 40.703717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec3144a000 [ 40.704678] RBP: 00007fec3144a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.705614] R10: 0000000000000812 R11: 0000000000000206 R12: 000056520aca7f70 [ 40.706533] R13: 00007ffc0fee8750 R14: 00007ffc0fee8780 R15: 00007ffc0fee8ae0 [ 40.707482] [ 40.707799] [ 40.708042] Allocated by task 220: [ 40.708528] kasan_save_stack+0x22/0x50 [ 40.709088] kasan_set_track+0x25/0x30 [ 40.709631] __kasan_slab_alloc+0x59/0x70 [ 40.710215] kmem_cache_alloc+0x16b/0x370 [ 40.710796] vm_area_dup+0x20/0x160 [ 40.711322] __split_vma+0x170/0x950 [ 40.711834] split_vma+0xc6/0x110 [ 40.712318] mprotect_fixup+0x8d2/0xb30 [ 40.712873] do_mprotect_pkey+0x87e/0xd40 [ 40.713447] __x64_sys_mprotect+0x78/0xc0 [ 40.714017] do_syscall_64+0x3f/0x90 [ 40.714533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.715251] [ 40.715487] Freed by task 220: [ 40.715915] kasan_save_stack+0x22/0x50 [ 40.716485] kasan_set_track+0x25/0x30 [ 40.717045] kasan_save_free_info+0x2b/0x50 [ 40.717658] __kasan_slab_free+0x10a/0x190 [ 40.718269] kmem_cache_free+0x10d/0x4d0 [ 40.718940] rcu_core+0x8c8/0x2860 [ 40.719452] __do_softirq+0x1b7/0x7d4 [ 40.719997] [ 40.720244] Last potentially related work creation: [ 40.720923] kasan_save_stack+0x22/0x50 [ 40.721501] __kasan_record_aux_stack+0x8e/0xa0 [ 40.722149] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.722893] remove_vma+0x139/0x170 [ 40.723408] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.724053] do_vmi_munmap+0x1f1/0x2b0 [ 40.724610] __vm_munmap+0x138/0x3a0 [ 40.725141] __x64_sys_munmap+0x59/0x80 [ 40.725709] do_syscall_64+0x3f/0x90 [ 40.726255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.726996] [ 40.727242] The buggy address belongs to the object at ffff88800f72ae80 [ 40.727242] which belongs to the cache vm_area_struct of size 168 [ 40.728926] The buggy address is located 88 bytes inside of [ 40.728926] freed 168-byte region [ffff88800f72ae80, ffff88800f72af28) [ 40.730551] [ 40.730801] The buggy address belongs to the physical page: [ 40.731583] page:000000002bacbc26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf72a [ 40.732827] memcg:ffff88800d670001 [ 40.733315] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.734061] page_type: 0xffffffff() [ 40.734581] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.735642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d670001 [ 40.736684] page dumped because: kasan: bad access detected [ 40.737465] [ 40.737718] Memory state around the buggy address: [ 40.738391] ffff88800f72ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.739384] ffff88800f72ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.740384] >ffff88800f72ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.741369] ^ [ 40.742221] ffff88800f72af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.743238] ffff88800f72af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.744233] ================================================================== [ 40.745302] Disabling lock debugging due to kernel taint [ 43.184081] BUG: Bad rss-counter state mm:00000000bf78933a type:MM_FILEPAGES val:33 [ 43.184890] BUG: Bad rss-counter state mm:00000000bf78933a type:MM_ANONPAGES val:22 [ 43.609090] BUG: Bad rss-counter state mm:0000000050957a5c type:MM_FILEPAGES val:33 [ 43.610390] BUG: Bad rss-counter state mm:0000000050957a5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16046' (ECDSA) to the list of known hosts. 2023/06/20 02:43:55 fuzzer started 2023/06/20 02:43:55 dialing manager at localhost:44161 2023/06/20 02:43:55 checking machine... 2023/06/20 02:43:55 checking revisions... [ 44.269684] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:43:55 testing simple program... [ 44.319692] cgroup: Unknown subsys name 'net' [ 44.360945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:53 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09a01 RSI=ffff88806ce09a48 RDI=ffff88806ce09a60 RBP=ffff88806ce09aa8 RSP=ffff88806ce09990 R8 =ffffffff8609675a R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a50 R15=ffff88806ce09a50 RIP=ffffffff81131039 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f518e1e1900 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=00007f518d6719c0 CR3=000000000c9be000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f9abdb187f34f9b900000000000ae988 XMM05=9dcfa6af46f7ee830000000000134a38 XMM06=e8008b1642ea3e600000000000133768 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8609fb01 RDX=1ffff1100d9e135e RSI=ffffffff8450b05e RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888014549b40 R15=ffff88806cf09a98 RIP=ffffffff8113062c 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 00007fae061f6700 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=00007ffebfc247d8 CR3=000000000d1ca000 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=2034353a33343a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a33343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000