syzkaller login: [ 36.700311] BUG: Bad rss-counter state mm:000000008ce9dd53 type:MM_FILEPAGES val:33 [ 36.701459] BUG: Bad rss-counter state mm:000000008ce9dd53 type:MM_ANONPAGES val:22 [ 36.858407] ================================================================== [ 36.859549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.860713] Read of size 8 at addr ffff88801a98ced8 by task sshd/220 [ 36.861685] [ 36.861959] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.863047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.864430] Call Trace: [ 36.864764] [ 36.865052] dump_stack_lvl+0x91/0xf0 [ 36.865547] print_report+0xcc/0x620 [ 36.866036] ? __virt_addr_valid+0x102/0x340 [ 36.866625] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.867246] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.867878] kasan_report+0xbe/0xf0 [ 36.868360] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.868989] vma_interval_tree_remove+0xc75/0xec0 [ 36.869598] vma_prepare+0xc54/0x11a0 [ 36.870077] __split_vma+0x5af/0x950 [ 36.870557] ? __pfx___split_vma+0x10/0x10 [ 36.871093] ? find_held_lock+0x2c/0x110 [ 36.871631] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.872199] ? lock_is_held_type+0x9f/0x120 [ 36.872744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.873366] ? mtree_range_walk+0x632/0x900 [ 36.873927] ? mas_walk+0x5c7/0x7c0 [ 36.874405] do_vmi_munmap+0x1f1/0x2b0 [ 36.874903] mmap_region+0x1f9/0x2660 [ 36.875390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.875919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.876644] ? __pfx_lock_acquire+0x10/0x10 [ 36.877180] ? __pfx_mmap_region+0x10/0x10 [ 36.877720] ? security_mmap_addr+0x7d/0xa0 [ 36.878252] ? get_unmapped_area+0x1f5/0x3f0 [ 36.878809] do_mmap+0x854/0xf00 [ 36.879253] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.879770] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.880337] ksys_mmap_pgoff+0x3af/0x500 [ 36.880857] do_syscall_64+0x3f/0x90 [ 36.881345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.881995] RIP: 0033:0x7f12c92f7d82 [ 36.882454] 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 [ 36.884630] RSP: 002b:00007fffab2c3008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.885552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12c92f7d82 [ 36.886411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12c8731000 [ 36.887271] RBP: 00007f12c8731000 R08: 0000000000000009 R09: 0000000000001000 [ 36.888137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a43718dec0 [ 36.889007] R13: 00007fffab2c3020 R14: 00007fffab2c3050 R15: 00007fffab2c33b0 [ 36.889876] [ 36.890171] [ 36.890390] Allocated by task 213: [ 36.890831] kasan_save_stack+0x22/0x50 [ 36.891342] kasan_set_track+0x25/0x30 [ 36.891859] __kasan_slab_alloc+0x59/0x70 [ 36.892390] kmem_cache_alloc+0x16b/0x370 [ 36.892912] vm_area_dup+0x20/0x160 [ 36.893372] __split_vma+0x170/0x950 [ 36.893845] split_vma+0xc6/0x110 [ 36.894291] mprotect_fixup+0x8d2/0xb30 [ 36.894796] do_mprotect_pkey+0x87e/0xd40 [ 36.895322] __x64_sys_mprotect+0x78/0xc0 [ 36.895864] do_syscall_64+0x3f/0x90 [ 36.896350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.896998] [ 36.897217] Freed by task 213: [ 36.897617] kasan_save_stack+0x22/0x50 [ 36.898127] kasan_set_track+0x25/0x30 [ 36.898626] kasan_save_free_info+0x2b/0x50 [ 36.899164] __kasan_slab_free+0x10a/0x190 [ 36.899717] kmem_cache_free+0x10d/0x4d0 [ 36.900231] rcu_core+0x8c8/0x2860 [ 36.900689] __do_softirq+0x1b7/0x7d4 [ 36.901165] [ 36.901387] Last potentially related work creation: [ 36.901988] kasan_save_stack+0x22/0x50 [ 36.902497] __kasan_record_aux_stack+0x8e/0xa0 [ 36.903078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.903728] remove_vma+0x139/0x170 [ 36.904173] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.904717] do_vmi_munmap+0x1f1/0x2b0 [ 36.905186] __vm_munmap+0x138/0x3a0 [ 36.905713] __x64_sys_munmap+0x59/0x80 [ 36.906207] do_syscall_64+0x3f/0x90 [ 36.906683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.907301] [ 36.907527] The buggy address belongs to the object at ffff88801a98ce80 [ 36.907527] which belongs to the cache vm_area_struct of size 168 [ 36.908972] The buggy address is located 88 bytes inside of [ 36.908972] freed 168-byte region [ffff88801a98ce80, ffff88801a98cf28) [ 36.910363] [ 36.910576] The buggy address belongs to the physical page: [ 36.911377] page:00000000d7ff5fe7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a98c [ 36.912504] memcg:ffff88800e450301 [ 36.912952] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.913606] page_type: 0xffffffff() [ 36.914057] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.914980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e450301 [ 36.915901] page dumped because: kasan: bad access detected [ 36.916558] [ 36.916775] Memory state around the buggy address: [ 36.917355] ffff88801a98cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.918208] ffff88801a98ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.919058] >ffff88801a98ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.919934] ^ [ 36.920668] ffff88801a98cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.921532] ffff88801a98cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.922388] ================================================================== [ 36.923380] Disabling lock debugging due to kernel taint [ 38.745207] BUG: Bad rss-counter state mm:00000000075acea4 type:MM_FILEPAGES val:33 [ 38.746056] BUG: Bad rss-counter state mm:00000000075acea4 type:MM_ANONPAGES val:22 [ 39.290469] BUG: Bad rss-counter state mm:0000000003de481d type:MM_FILEPAGES val:33 [ 39.291934] BUG: Bad rss-counter state mm:0000000003de481d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50475' (ECDSA) to the list of known hosts. 2023/06/19 14:41:32 fuzzer started 2023/06/19 14:41:32 dialing manager at localhost:44161 2023/06/19 14:41:32 checking machine... 2023/06/19 14:41:32 checking revisions... [ 39.940178] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:41:32 testing simple program... [ 39.984287] cgroup: Unknown subsys name 'net' [ 40.045168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f8159138728 CR3=000000000c718000 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=c48fcb2acaab3789174eb64bceb6d79b XMM02=ec2efd57dc4c00df000000000011d6a8 XMM03=9177f0b73e01991f000000000011d778 XMM04=c23f1193643f297800000000000ae988 XMM05=fe93fda7513056cf0000000000135938 XMM06=19e9129bd510f23500000000001347d0 XMM07=fb795ef6d65770560000000000124c30 XMM08=2c67c8bc2e329bc3000000000011d718 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880190f97c0 RCX=0000000000000000 RDX=ffff8880162751c0 RSI=ffffffff83634c51 RDI=ffff8880190f9848 RBP=0000000000000010 RSP=ffff88800fc2fdd0 R8 =0000000000000000 R9 =ffffed100321f309 R10=ffff8880190f984b R11=00000000000b6996 R12=ffff8880190f9700 R13=0000000000000009 R14=1ffff11001f85fd1 R15=0000000000000000 RIP=ffffffff814c07e4 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 00007f9d66950900 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=00007f9d66f080b0 CR3=0000000016b28000 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=2032333a31343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a31343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000