syzkaller login: [ 31.224702] BUG: Bad rss-counter state mm:0000000026bfd02e type:MM_FILEPAGES val:33 [ 31.225739] BUG: Bad rss-counter state mm:0000000026bfd02e type:MM_ANONPAGES val:22 [ 31.381176] ================================================================== [ 31.382090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.383070] Read of size 8 at addr ffff88800d684140 by task sshd/220 [ 31.383845] [ 31.384067] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.385088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.386073] Call Trace: [ 31.386409] <TASK> [ 31.386693] dump_stack_lvl+0x91/0xf0 [ 31.387216] print_report+0xcc/0x620 [ 31.387702] ? __virt_addr_valid+0x102/0x340 [ 31.388257] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.388880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389539] kasan_report+0xbe/0xf0 [ 31.390023] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.390652] vma_interval_tree_remove+0xc75/0xec0 [ 31.391264] vma_prepare+0xc54/0x11a0 [ 31.391752] __split_vma+0x5af/0x950 [ 31.392236] ? __pfx___split_vma+0x10/0x10 [ 31.392769] ? find_held_lock+0x2c/0x110 [ 31.393311] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.393895] ? lock_is_held_type+0x9f/0x120 [ 31.394449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.395065] ? mtree_range_walk+0x632/0x900 [ 31.395622] ? mas_walk+0x5c7/0x7c0 [ 31.396112] do_vmi_munmap+0x1f1/0x2b0 [ 31.396619] mmap_region+0x1f9/0x2660 [ 31.397114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.397637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.398374] ? __pfx_lock_acquire+0x10/0x10 [ 31.398919] ? __pfx_mmap_region+0x10/0x10 [ 31.399470] ? security_mmap_addr+0x7d/0xa0 [ 31.400018] ? get_unmapped_area+0x1f5/0x3f0 [ 31.400590] do_mmap+0x854/0xf00 [ 31.401056] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.401559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.402130] ksys_mmap_pgoff+0x3af/0x500 [ 31.402645] do_syscall_64+0x3f/0x90 [ 31.403131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403788] RIP: 0033:0x7facaf76bd82 [ 31.404252] 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 [ 31.406426] RSP: 002b:00007ffcb38e0ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.407356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facaf76bd82 [ 31.408220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facaeba5000 [ 31.409104] RBP: 00007facaeba5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.409968] R10: 0000000000000812 R11: 0000000000000206 R12: 000056372527ff70 [ 31.410834] R13: 00007ffcb38e0af0 R14: 00007ffcb38e0b20 R15: 00007ffcb38e0e80 [ 31.411738] </TASK> [ 31.412035] [ 31.412253] Allocated by task 213: [ 31.412683] kasan_save_stack+0x22/0x50 [ 31.413204] kasan_set_track+0x25/0x30 [ 31.413712] __kasan_slab_alloc+0x59/0x70 [ 31.414255] kmem_cache_alloc+0x16b/0x370 [ 31.414794] vm_area_dup+0x20/0x160 [ 31.415262] __split_vma+0x170/0x950 [ 31.415734] split_vma+0xc6/0x110 [ 31.416173] mprotect_fixup+0x8d2/0xb30 [ 31.416687] do_mprotect_pkey+0x87e/0xd40 [ 31.417222] __x64_sys_mprotect+0x78/0xc0 [ 31.417755] do_syscall_64+0x3f/0x90 [ 31.418241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418898] [ 31.419115] Freed by task 213: [ 31.419531] kasan_save_stack+0x22/0x50 [ 31.420053] kasan_set_track+0x25/0x30 [ 31.420553] kasan_save_free_info+0x2b/0x50 [ 31.421106] __kasan_slab_free+0x10a/0x190 [ 31.421644] kmem_cache_free+0x10d/0x4d0 [ 31.422160] rcu_core+0x8c8/0x2860 [ 31.422607] __do_softirq+0x1b7/0x7d4 [ 31.423082] [ 31.423301] Last potentially related work creation: [ 31.423894] kasan_save_stack+0x22/0x50 [ 31.424398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.424989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.425644] remove_vma+0x139/0x170 [ 31.426105] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.426723] do_vmi_munmap+0x1f1/0x2b0 [ 31.427213] __vm_munmap+0x138/0x3a0 [ 31.427687] __x64_sys_munmap+0x59/0x80 [ 31.428183] do_syscall_64+0x3f/0x90 [ 31.428666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429329] [ 31.429540] The buggy address belongs to the object at ffff88800d6840e8 [ 31.429540] which belongs to the cache vm_area_struct of size 168 [ 31.431061] The buggy address is located 88 bytes inside of [ 31.431061] freed 168-byte region [ffff88800d6840e8, ffff88800d684190) [ 31.432464] [ 31.432685] The buggy address belongs to the physical page: [ 31.433351] page:00000000b91118f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd684 [ 31.434444] memcg:ffff888015d06a01 [ 31.434878] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.435529] page_type: 0xffffffff() [ 31.435984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.436904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d06a01 [ 31.437839] page dumped because: kasan: bad access detected [ 31.438541] [ 31.438767] Memory state around the buggy address: [ 31.439366] ffff88800d684000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.440245] ffff88800d684080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.441130] >ffff88800d684100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.441999] ^ [ 31.442648] ffff88800d684180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.443515] ffff88800d684200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.444385] ================================================================== [ 31.445534] Disabling lock debugging due to kernel taint [ 33.517157] BUG: Bad rss-counter state mm:00000000ec20ae9e type:MM_FILEPAGES val:33 [ 33.518193] BUG: Bad rss-counter state mm:00000000ec20ae9e type:MM_ANONPAGES val:22 [ 34.060188] BUG: Bad rss-counter state mm:000000008944287f type:MM_FILEPAGES val:33 [ 34.061464] BUG: Bad rss-counter state mm:000000008944287f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49114' (ECDSA) to the list of known hosts. 2023/06/20 15:16:12 fuzzer started 2023/06/20 15:16:12 dialing manager at localhost:36067 2023/06/20 15:16:12 checking machine... 2023/06/20 15:16:12 checking revisions... [ 34.689443] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:16:12 testing simple program... [ 34.732171] cgroup: Unknown subsys name 'net' [ 34.777220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:16:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81130399 RCX=ffffffff860acb01 RDX=1ffff1100d9c1358 RSI=0000000000000000 RDI=ffffffff81130399 RBP=ffffffff81130399 RSP=ffff88806ce09a18 R8 =ffffffff860acb2c R9 =ffff88806ce09aa8 R10=0000000000038001 R11=00000000000097aa R12=0000000000000001 R13=0000000000000000 R14=ffff888015e91b40 R15=ffff88800ca9bc80 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f9980f43900 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=00007f99814fb0b0 CR3=000000000eb7c000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007ffd11404618 CR3=0000000018336000 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=2032313a36313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000