syzkaller login: [ 31.230390] BUG: Bad rss-counter state mm:00000000a03373d4 type:MM_FILEPAGES val:33 [ 31.231632] BUG: Bad rss-counter state mm:00000000a03373d4 type:MM_ANONPAGES val:22 [ 31.267531] ================================================================== [ 31.268858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.269981] Read of size 8 at addr ffff8880145a5d08 by task sshd/219 [ 31.270920] [ 31.271146] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.272166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.273379] Call Trace: [ 31.273727] [ 31.274090] dump_stack_lvl+0x91/0xf0 [ 31.274658] print_report+0xcc/0x620 [ 31.275240] ? __virt_addr_valid+0x102/0x340 [ 31.275926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.276594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277236] kasan_report+0xbe/0xf0 [ 31.277849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278544] vma_interval_tree_remove+0xc75/0xec0 [ 31.279135] vma_prepare+0xc54/0x11a0 [ 31.279594] __split_vma+0x5af/0x950 [ 31.280048] ? __pfx___split_vma+0x10/0x10 [ 31.280564] ? find_held_lock+0x2c/0x110 [ 31.281164] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.281745] ? lock_is_held_type+0x9f/0x120 [ 31.282338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.283060] ? mtree_range_walk+0x632/0x900 [ 31.283692] ? mas_walk+0x5c7/0x7c0 [ 31.284182] do_vmi_munmap+0x1f1/0x2b0 [ 31.284656] mmap_region+0x1f9/0x2660 [ 31.285120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.285608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.286281] ? __pfx_lock_acquire+0x10/0x10 [ 31.286789] ? __pfx_mmap_region+0x10/0x10 [ 31.287291] ? security_mmap_addr+0x7d/0xa0 [ 31.287795] ? get_unmapped_area+0x1f5/0x3f0 [ 31.288348] do_mmap+0x854/0xf00 [ 31.288835] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.289329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.289898] ksys_mmap_pgoff+0x3af/0x500 [ 31.290441] do_syscall_64+0x3f/0x90 [ 31.290964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291652] RIP: 0033:0x7f3c8279ad82 [ 31.292215] 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 [ 31.294499] RSP: 002b:00007ffdccf27cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.295454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c8279ad82 [ 31.296351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c81bd4000 [ 31.297236] RBP: 00007f3c81bd4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.298106] R10: 0000000000000812 R11: 0000000000000206 R12: 000056522c81aec0 [ 31.298979] R13: 00007ffdccf27d10 R14: 00007ffdccf27d40 R15: 00007ffdccf280a0 [ 31.299887] [ 31.300208] [ 31.300438] Allocated by task 212: [ 31.300891] kasan_save_stack+0x22/0x50 [ 31.301424] kasan_set_track+0x25/0x30 [ 31.301944] __kasan_slab_alloc+0x59/0x70 [ 31.302494] kmem_cache_alloc+0x16b/0x370 [ 31.303037] vm_area_dup+0x20/0x160 [ 31.303525] __split_vma+0x170/0x950 [ 31.304030] split_vma+0xc6/0x110 [ 31.304530] mprotect_fixup+0x8d2/0xb30 [ 31.305056] do_mprotect_pkey+0x87e/0xd40 [ 31.305606] __x64_sys_mprotect+0x78/0xc0 [ 31.306148] do_syscall_64+0x3f/0x90 [ 31.306651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307345] [ 31.307638] Freed by task 212: [ 31.308077] kasan_save_stack+0x22/0x50 [ 31.308628] kasan_set_track+0x25/0x30 [ 31.309154] kasan_save_free_info+0x2b/0x50 [ 31.309717] __kasan_slab_free+0x10a/0x190 [ 31.310279] kmem_cache_free+0x10d/0x4d0 [ 31.310807] rcu_core+0x8c8/0x2860 [ 31.311284] __do_softirq+0x1b7/0x7d4 [ 31.311795] [ 31.312021] Last potentially related work creation: [ 31.312671] kasan_save_stack+0x22/0x50 [ 31.313197] __kasan_record_aux_stack+0x8e/0xa0 [ 31.313799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.314478] remove_vma+0x139/0x170 [ 31.314952] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.315542] do_vmi_munmap+0x1f1/0x2b0 [ 31.316048] __vm_munmap+0x138/0x3a0 [ 31.316546] __x64_sys_munmap+0x59/0x80 [ 31.317072] do_syscall_64+0x3f/0x90 [ 31.317571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318249] [ 31.318474] The buggy address belongs to the object at ffff8880145a5cb0 [ 31.318474] which belongs to the cache vm_area_struct of size 168 [ 31.320039] The buggy address is located 88 bytes inside of [ 31.320039] freed 168-byte region [ffff8880145a5cb0, ffff8880145a5d58) [ 31.321542] [ 31.321772] The buggy address belongs to the physical page: [ 31.322491] page:0000000034f3b39a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145a5 [ 31.323678] memcg:ffff888017b51901 [ 31.324148] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324846] page_type: 0xffffffff() [ 31.325319] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.326308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017b51901 [ 31.327283] page dumped because: kasan: bad access detected [ 31.327990] [ 31.328228] Memory state around the buggy address: [ 31.328844] ffff8880145a5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.329969] ffff8880145a5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.330928] >ffff8880145a5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.331832] ^ [ 31.332322] ffff8880145a5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.333239] ffff8880145a5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.334146] ================================================================== [ 31.335235] Disabling lock debugging due to kernel taint [ 33.120397] BUG: Bad rss-counter state mm:0000000029029e97 type:MM_FILEPAGES val:33 [ 33.121031] BUG: Bad rss-counter state mm:0000000029029e97 type:MM_ANONPAGES val:22 [ 33.557335] BUG: Bad rss-counter state mm:000000008cfff282 type:MM_FILEPAGES val:33 [ 33.558015] BUG: Bad rss-counter state mm:000000008cfff282 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49078' (ECDSA) to the list of known hosts. 2023/06/21 02:06:18 fuzzer started 2023/06/21 02:06:19 dialing manager at localhost:36067 2023/06/21 02:06:19 checking machine... 2023/06/21 02:06:19 checking revisions... [ 34.267335] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:06:19 testing simple program... [ 34.322900] cgroup: Unknown subsys name 'net' [ 34.364740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:06:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fda3680 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880102870e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff8880167e0130 RIP=ffffffff812d865e 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 00007fb74239e900 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=00007fb74237d020 CR3=000000000cb00000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e07db0 RBX=ffff888008d951c0 RCX=ffff88806cf0a000 RDX=ffff88806cf02000 RSI=ffff888008d951c0 RDI=ffff88806cf09a48 RBP=ffff88806cf09a98 RSP=ffff88806cf09a10 R8 =0000000000000006 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=ffff88806cf09a48 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff8450e147 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 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=00007f2814476d50 CR3=0000000019fec000 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=2038313a36303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a36303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000