syzkaller login: [ 30.583425] BUG: Bad rss-counter state mm:00000000c1f3ad08 type:MM_FILEPAGES val:33 [ 30.584839] BUG: Bad rss-counter state mm:00000000c1f3ad08 type:MM_ANONPAGES val:22 [ 30.624518] ================================================================== [ 30.625517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.626467] Read of size 8 at addr ffff888019ed7140 by task sshd/220 [ 30.627316] [ 30.627539] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.628421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.629411] Call Trace: [ 30.629736] [ 30.630022] dump_stack_lvl+0x91/0xf0 [ 30.630530] print_report+0xcc/0x620 [ 30.631015] ? __virt_addr_valid+0x102/0x340 [ 30.631571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632827] kasan_report+0xbe/0xf0 [ 30.633301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.633914] vma_interval_tree_remove+0xc75/0xec0 [ 30.634516] vma_prepare+0xc54/0x11a0 [ 30.634993] __split_vma+0x5af/0x950 [ 30.635464] ? __pfx___split_vma+0x10/0x10 [ 30.635991] ? find_held_lock+0x2c/0x110 [ 30.636550] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.637115] ? lock_is_held_type+0x9f/0x120 [ 30.637660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.638269] ? mtree_range_walk+0x632/0x900 [ 30.638823] ? mas_walk+0x5c7/0x7c0 [ 30.639304] do_vmi_munmap+0x1f1/0x2b0 [ 30.639797] mmap_region+0x1f9/0x2660 [ 30.640281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.640804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.641521] ? __pfx_lock_acquire+0x10/0x10 [ 30.642055] ? __pfx_mmap_region+0x10/0x10 [ 30.642583] ? security_mmap_addr+0x7d/0xa0 [ 30.643114] ? get_unmapped_area+0x1f5/0x3f0 [ 30.643665] do_mmap+0x854/0xf00 [ 30.644103] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.644608] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.645173] ksys_mmap_pgoff+0x3af/0x500 [ 30.645679] do_syscall_64+0x3f/0x90 [ 30.646166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.646811] RIP: 0033:0x7ff9b17e2d82 [ 30.647268] 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 [ 30.649409] RSP: 002b:00007ffdbe64aaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.650310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9b17e2d82 [ 30.651150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9b0c1c000 [ 30.651999] RBP: 00007ff9b0c1c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.652848] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f10345b20 [ 30.653697] R13: 00007ffdbe64ab10 R14: 00007ffdbe64ab40 R15: 00007ffdbe64aea0 [ 30.654555] [ 30.654848] [ 30.655065] Allocated by task 213: [ 30.655493] kasan_save_stack+0x22/0x50 [ 30.655998] kasan_set_track+0x25/0x30 [ 30.656520] __kasan_slab_alloc+0x59/0x70 [ 30.657043] kmem_cache_alloc+0x16b/0x370 [ 30.657559] vm_area_dup+0x20/0x160 [ 30.658011] __split_vma+0x170/0x950 [ 30.658469] split_vma+0xc6/0x110 [ 30.658910] mprotect_fixup+0x8d2/0xb30 [ 30.659417] do_mprotect_pkey+0x87e/0xd40 [ 30.659937] __x64_sys_mprotect+0x78/0xc0 [ 30.660462] do_syscall_64+0x3f/0x90 [ 30.660940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.661575] [ 30.661792] Freed by task 213: [ 30.662179] kasan_save_stack+0x22/0x50 [ 30.662676] kasan_set_track+0x25/0x30 [ 30.663165] kasan_save_free_info+0x2b/0x50 [ 30.663696] __kasan_slab_free+0x10a/0x190 [ 30.664226] kmem_cache_free+0x10d/0x4d0 [ 30.664738] rcu_core+0x8c8/0x2860 [ 30.665183] __do_softirq+0x1b7/0x7d4 [ 30.665657] [ 30.665873] Last potentially related work creation: [ 30.666457] kasan_save_stack+0x22/0x50 [ 30.666952] __kasan_record_aux_stack+0x8e/0xa0 [ 30.667523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.668163] remove_vma+0x139/0x170 [ 30.668637] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.669194] do_vmi_munmap+0x1f1/0x2b0 [ 30.669676] __vm_munmap+0x138/0x3a0 [ 30.670145] __x64_sys_munmap+0x59/0x80 [ 30.670642] do_syscall_64+0x3f/0x90 [ 30.671120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671757] [ 30.671974] The buggy address belongs to the object at ffff888019ed70e8 [ 30.671974] which belongs to the cache vm_area_struct of size 168 [ 30.673434] The buggy address is located 88 bytes inside of [ 30.673434] freed 168-byte region [ffff888019ed70e8, ffff888019ed7190) [ 30.674830] [ 30.675045] The buggy address belongs to the physical page: [ 30.675704] page:0000000054e33d7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ed7 [ 30.676802] memcg:ffff88800fca0d01 [ 30.677226] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.677869] page_type: 0xffffffff() [ 30.678320] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.679237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fca0d01 [ 30.680134] page dumped because: kasan: bad access detected [ 30.680803] [ 30.681020] Memory state around the buggy address: [ 30.681601] ffff888019ed7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.682448] ffff888019ed7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.683296] >ffff888019ed7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.684143] ^ [ 30.684788] ffff888019ed7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.685646] ffff888019ed7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.686503] ================================================================== [ 30.687649] Disabling lock debugging due to kernel taint [ 32.576871] BUG: Bad rss-counter state mm:000000005e2feafb type:MM_FILEPAGES val:33 [ 32.577919] BUG: Bad rss-counter state mm:000000005e2feafb type:MM_ANONPAGES val:22 [ 33.031607] BUG: Bad rss-counter state mm:00000000220062f1 type:MM_FILEPAGES val:33 [ 33.033233] BUG: Bad rss-counter state mm:00000000220062f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1532' (ECDSA) to the list of known hosts. 2023/06/21 02:51:32 fuzzer started 2023/06/21 02:51:32 dialing manager at localhost:36067 2023/06/21 02:51:32 checking machine... 2023/06/21 02:51:32 checking revisions... [ 33.737191] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:51:32 testing simple program... [ 33.785013] cgroup: Unknown subsys name 'net' [ 33.827058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801669e000 RCX=0000000000000000 RDX=ffff8880100b51c0 RSI=ffffffff83695dcd RDI=ffff888014582140 RBP=ffff888014582140 RSP=ffff8880165c79b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ff00545000000000 R12=ffff8880165c7e60 R13=ffff8880162f3f40 R14=ffff8880165c7a88 R15=00000000000000e8 RIP=ffffffff836826c6 RFL=00000293 [--S-A-C] 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 00007f5f2a73f900 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=00007ffc8704e000 CR3=000000000c5e6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f2a2d655530 CR3=000000000fd68000 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=2031333a31353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a31353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000