syzkaller login: [ 31.186766] BUG: Bad rss-counter state mm:00000000a33b982c type:MM_FILEPAGES val:33 [ 31.187968] BUG: Bad rss-counter state mm:00000000a33b982c type:MM_ANONPAGES val:22 [ 31.224702] ================================================================== [ 31.225686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.226615] Read of size 8 at addr ffff8880181ee6b0 by task sshd/220 [ 31.227465] [ 31.227682] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.228532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.229509] Call Trace: [ 31.229824] [ 31.230113] dump_stack_lvl+0x91/0xf0 [ 31.230606] print_report+0xcc/0x620 [ 31.231129] ? __virt_addr_valid+0x102/0x340 [ 31.231681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232911] kasan_report+0xbe/0xf0 [ 31.233387] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233998] vma_interval_tree_remove+0xc75/0xec0 [ 31.234600] vma_prepare+0xc54/0x11a0 [ 31.235112] __split_vma+0x5af/0x950 [ 31.235579] ? __pfx___split_vma+0x10/0x10 [ 31.236106] ? find_held_lock+0x2c/0x110 [ 31.236623] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.237177] ? lock_is_held_type+0x9f/0x120 [ 31.237719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.238322] ? mtree_range_walk+0x632/0x900 [ 31.238875] ? mas_walk+0x5c7/0x7c0 [ 31.239397] do_vmi_munmap+0x1f1/0x2b0 [ 31.239889] mmap_region+0x1f9/0x2660 [ 31.240375] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.240885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.241607] ? __pfx_lock_acquire+0x10/0x10 [ 31.242146] ? __pfx_mmap_region+0x10/0x10 [ 31.242672] ? security_mmap_addr+0x7d/0xa0 [ 31.243241] ? get_unmapped_area+0x1f5/0x3f0 [ 31.243785] do_mmap+0x854/0xf00 [ 31.244227] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.244715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.245269] ksys_mmap_pgoff+0x3af/0x500 [ 31.245772] do_syscall_64+0x3f/0x90 [ 31.246243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246889] RIP: 0033:0x7f0d9302fd82 [ 31.247368] 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 [ 31.249455] RSP: 002b:00007ffdfb75d858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.250347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d9302fd82 [ 31.251227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d92469000 [ 31.252066] RBP: 00007f0d92469000 R08: 0000000000000009 R09: 0000000000001000 [ 31.252910] R10: 0000000000000812 R11: 0000000000000206 R12: 000055718e169ec0 [ 31.253748] R13: 00007ffdfb75d870 R14: 00007ffdfb75d8a0 R15: 00007ffdfb75dc00 [ 31.254599] [ 31.254886] [ 31.255134] Allocated by task 213: [ 31.255565] kasan_save_stack+0x22/0x50 [ 31.256081] kasan_set_track+0x25/0x30 [ 31.256569] __kasan_slab_alloc+0x59/0x70 [ 31.257089] kmem_cache_alloc+0x16b/0x370 [ 31.257602] vm_area_dup+0x20/0x160 [ 31.258062] __split_vma+0x170/0x950 [ 31.258541] split_vma+0xc6/0x110 [ 31.258980] mprotect_fixup+0x8d2/0xb30 [ 31.259523] do_mprotect_pkey+0x87e/0xd40 [ 31.260055] __x64_sys_mprotect+0x78/0xc0 [ 31.260576] do_syscall_64+0x3f/0x90 [ 31.261064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261715] [ 31.261931] Freed by task 213: [ 31.262322] kasan_save_stack+0x22/0x50 [ 31.262823] kasan_set_track+0x25/0x30 [ 31.263338] kasan_save_free_info+0x2b/0x50 [ 31.263880] __kasan_slab_free+0x10a/0x190 [ 31.264414] kmem_cache_free+0x10d/0x4d0 [ 31.264920] rcu_core+0x8c8/0x2860 [ 31.265370] __do_softirq+0x1b7/0x7d4 [ 31.265852] [ 31.266077] Last potentially related work creation: [ 31.266667] kasan_save_stack+0x22/0x50 [ 31.267203] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.268438] remove_vma+0x139/0x170 [ 31.268895] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.269451] do_vmi_munmap+0x1f1/0x2b0 [ 31.269951] __vm_munmap+0x138/0x3a0 [ 31.270421] __x64_sys_munmap+0x59/0x80 [ 31.270920] do_syscall_64+0x3f/0x90 [ 31.271434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272075] [ 31.272292] The buggy address belongs to the object at ffff8880181ee658 [ 31.272292] which belongs to the cache vm_area_struct of size 168 [ 31.273755] The buggy address is located 88 bytes inside of [ 31.273755] freed 168-byte region [ffff8880181ee658, ffff8880181ee700) [ 31.275179] [ 31.275396] The buggy address belongs to the physical page: [ 31.276050] page:00000000da2c0d1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181ee [ 31.277143] memcg:ffff8880183dc701 [ 31.277566] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.278212] page_type: 0xffffffff() [ 31.278657] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.279623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183dc701 [ 31.280532] page dumped because: kasan: bad access detected [ 31.281194] [ 31.281416] Memory state around the buggy address: [ 31.281990] ffff8880181ee580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.282842] ffff8880181ee600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.283723] >ffff8880181ee680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.284570] ^ [ 31.285155] ffff8880181ee700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.286011] ffff8880181ee780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.286857] ================================================================== [ 31.287907] Disabling lock debugging due to kernel taint [ 33.753361] BUG: Bad rss-counter state mm:000000003619289b type:MM_FILEPAGES val:33 [ 33.755125] BUG: Bad rss-counter state mm:000000003619289b type:MM_ANONPAGES val:22 [ 34.154604] BUG: Bad rss-counter state mm:000000001b8c8af3 type:MM_FILEPAGES val:33 [ 34.155474] BUG: Bad rss-counter state mm:000000001b8c8af3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17723' (ECDSA) to the list of known hosts. 2023/06/20 14:00:26 fuzzer started 2023/06/20 14:00:26 dialing manager at localhost:36067 2023/06/20 14:00:26 checking machine... 2023/06/20 14:00:26 checking revisions... [ 34.848364] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:00:26 testing simple program... [ 34.898016] cgroup: Unknown subsys name 'net' [ 34.946296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:00:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1320 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce098f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-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 00007f01253a0900 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=00007f01247fb010 CR3=000000000cd24000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ac2d5a4992e0602a00000000000ae988 XMM05=6e4430fd55761e100000000000134590 XMM06=4fda316b135da52b0000000000133630 XMM07=fb795ef6d65770560000000000124040 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015ad51c0 RSI=ffffffff816f2438 RDI=0000000000000006 RBP=00007f158803194a RSP=ffff88800e837a18 R8 =0000000000000006 R9 =00007f15880318f0 R10=00007f158803194a R11=0000000000000000 R12=000000000000005a R13=00007f15880318f0 R14=0000000000000000 R15=1ffff11001d06f44 RIP=ffffffff816f243b RFL=00040293 [--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 00007f159e663700 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=00007ff108be1618 CR3=000000000dcc0000 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=2035323a30303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000