syzkaller login: [ 32.757971] BUG: Bad rss-counter state mm:000000002c3f45c3 type:MM_FILEPAGES val:33 [ 32.759212] BUG: Bad rss-counter state mm:000000002c3f45c3 type:MM_ANONPAGES val:22 [ 32.883854] ================================================================== [ 32.884756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.885634] Read of size 8 at addr ffff888019140968 by task sshd/221 [ 32.886352] [ 32.886559] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.887499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.888423] Call Trace: [ 32.888724] [ 32.888993] dump_stack_lvl+0x91/0xf0 [ 32.889479] print_report+0xcc/0x620 [ 32.889934] ? __virt_addr_valid+0x102/0x340 [ 32.890455] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.891032] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.891612] kasan_report+0xbe/0xf0 [ 32.892059] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.892653] vma_interval_tree_remove+0xc75/0xec0 [ 32.893220] vma_prepare+0xc54/0x11a0 [ 32.893671] __split_vma+0x5af/0x950 [ 32.894114] ? __pfx___split_vma+0x10/0x10 [ 32.894617] ? find_held_lock+0x2c/0x110 [ 32.895111] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.895640] ? lock_is_held_type+0x9f/0x120 [ 32.896143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.896721] ? mtree_range_walk+0x632/0x900 [ 32.897240] ? mas_walk+0x5c7/0x7c0 [ 32.897816] do_vmi_munmap+0x1f1/0x2b0 [ 32.898421] mmap_region+0x1f9/0x2660 [ 32.899013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.899648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.900527] ? __pfx_lock_acquire+0x10/0x10 [ 32.901197] ? __pfx_mmap_region+0x10/0x10 [ 32.901855] ? security_mmap_addr+0x7d/0xa0 [ 32.902521] ? get_unmapped_area+0x1f5/0x3f0 [ 32.903201] do_mmap+0x854/0xf00 [ 32.903727] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.904324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.905024] ksys_mmap_pgoff+0x3af/0x500 [ 32.905631] do_syscall_64+0x3f/0x90 [ 32.906200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.907010] RIP: 0033:0x7fc500055d82 [ 32.907573] 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 [ 32.909984] RSP: 002b:00007ffc953318f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.911055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc500055d82 [ 32.912052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4ff48f000 [ 32.913054] RBP: 00007fc4ff48f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.914032] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f333db980 [ 32.915001] R13: 00007ffc95331910 R14: 00007ffc95331940 R15: 00007ffc95331ca0 [ 32.915979] [ 32.916325] [ 32.916576] Allocated by task 214: [ 32.917071] kasan_save_stack+0x22/0x50 [ 32.917651] kasan_set_track+0x25/0x30 [ 32.918217] __kasan_slab_alloc+0x59/0x70 [ 32.918820] kmem_cache_alloc+0x16b/0x370 [ 32.919420] vm_area_dup+0x20/0x160 [ 32.919939] __split_vma+0x170/0x950 [ 32.920500] split_vma+0xc6/0x110 [ 32.921014] mprotect_fixup+0x8d2/0xb30 [ 32.921599] do_mprotect_pkey+0x87e/0xd40 [ 32.922196] __x64_sys_mprotect+0x78/0xc0 [ 32.922817] do_syscall_64+0x3f/0x90 [ 32.923338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.924043] [ 32.924293] Freed by task 214: [ 32.924723] kasan_save_stack+0x22/0x50 [ 32.925281] kasan_set_track+0x25/0x30 [ 32.925827] kasan_save_free_info+0x2b/0x50 [ 32.926409] __kasan_slab_free+0x10a/0x190 [ 32.927000] kmem_cache_free+0x10d/0x4d0 [ 32.927565] rcu_core+0x8c8/0x2860 [ 32.928126] __do_softirq+0x1b7/0x7d4 [ 32.928665] [ 32.928902] Last potentially related work creation: [ 32.929552] kasan_save_stack+0x22/0x50 [ 32.930104] __kasan_record_aux_stack+0x8e/0xa0 [ 32.930731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.931428] remove_vma+0x139/0x170 [ 32.931927] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.932567] do_vmi_munmap+0x1f1/0x2b0 [ 32.933128] __vm_munmap+0x138/0x3a0 [ 32.933679] __x64_sys_munmap+0x59/0x80 [ 32.934240] do_syscall_64+0x3f/0x90 [ 32.934776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.935507] [ 32.935751] The buggy address belongs to the object at ffff888019140910 [ 32.935751] which belongs to the cache vm_area_struct of size 168 [ 32.937435] The buggy address is located 88 bytes inside of [ 32.937435] freed 168-byte region [ffff888019140910, ffff8880191409b8) [ 32.939057] [ 32.939307] The buggy address belongs to the physical page: [ 32.940071] page:0000000055186866 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19140 [ 32.941332] memcg:ffff88801a0b0501 [ 32.941832] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.942574] page_type: 0xffffffff() [ 32.943094] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.944145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b0501 [ 32.945179] page dumped because: kasan: bad access detected [ 32.945939] [ 32.946192] Memory state around the buggy address: [ 32.946844] ffff888019140800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.947819] ffff888019140880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.948972] >ffff888019140900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.950008] ^ [ 32.950963] ffff888019140980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.952000] ffff888019140a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.953060] ================================================================== [ 32.954255] Disabling lock debugging due to kernel taint [ 35.526557] BUG: Bad rss-counter state mm:000000009116536a type:MM_FILEPAGES val:33 [ 35.527760] BUG: Bad rss-counter state mm:000000009116536a type:MM_ANONPAGES val:22 [ 36.079942] BUG: Bad rss-counter state mm:000000007e142292 type:MM_FILEPAGES val:33 [ 36.081154] BUG: Bad rss-counter state mm:000000007e142292 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29902' (ECDSA) to the list of known hosts. 2023/06/19 11:41:30 fuzzer started 2023/06/19 11:41:31 dialing manager at localhost:44161 2023/06/19 11:41:31 checking machine... 2023/06/19 11:41:31 checking revisions... [ 36.659935] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:41:31 testing simple program... [ 36.692938] cgroup: Unknown subsys name 'net' [ 36.750433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:41:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015bcf4b8 RCX=0000000000000001 RDX=1ffff11002b79ea2 RSI=ffff888015bcf978 RDI=ffffffff81b4bda1 RBP=ffff888015bcf510 RSP=ffff888015bcf4a0 R8 =0000000000000001 R9 =ffff888015bcf4f8 R10=0000000000038001 R11=000000000002b989 R12=ffff888015bcf580 R13=0000000000000000 R14=ffff88800d130000 R15=0000000000000000 RIP=ffffffff811303b2 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 00007fcf8d39f700 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=00007ffe8fbd4a88 CR3=0000000010358000 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=2030333a31343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000005 RCX=ffffffff81f76810 RDX=ffff88800ee051c0 RSI=0000000000000006 RDI=0000000000000001 RBP=ffffffff849c9b00 RSP=ffff88801cdd7988 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=0000000000000007 R15=0000000000000083 RIP=ffffffff814c0425 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 00007f92474b1900 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=00007fffc46d8000 CR3=000000000d65c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000