syzkaller login: [ 28.773599] BUG: Bad rss-counter state mm:000000008f049947 type:MM_FILEPAGES val:33 [ 28.774637] BUG: Bad rss-counter state mm:000000008f049947 type:MM_ANONPAGES val:22 [ 28.813565] ================================================================== [ 28.814288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.815014] Read of size 8 at addr ffff88800e496b38 by task sshd/222 [ 28.815606] [ 28.815780] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.816474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.817254] Call Trace: [ 28.817510] [ 28.817751] dump_stack_lvl+0x91/0xf0 [ 28.818323] print_report+0xcc/0x620 [ 28.818720] ? __virt_addr_valid+0x102/0x340 [ 28.819160] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.819665] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.820144] kasan_report+0xbe/0xf0 [ 28.820536] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.821012] vma_interval_tree_remove+0xc75/0xec0 [ 28.821497] vma_prepare+0xc54/0x11a0 [ 28.821908] __split_vma+0x5af/0x950 [ 28.822279] ? __pfx___split_vma+0x10/0x10 [ 28.822674] ? find_held_lock+0x2c/0x110 [ 28.822985] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.823333] ? lock_is_held_type+0x9f/0x120 [ 28.823655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.824024] ? mtree_range_walk+0x632/0x900 [ 28.824369] ? mas_walk+0x5c7/0x7c0 [ 28.824659] do_vmi_munmap+0x1f1/0x2b0 [ 28.824960] mmap_region+0x1f9/0x2660 [ 28.825263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.825572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.826024] ? __pfx_lock_acquire+0x10/0x10 [ 28.826342] ? __pfx_mmap_region+0x10/0x10 [ 28.826651] ? security_mmap_addr+0x7d/0xa0 [ 28.826973] ? get_unmapped_area+0x1f5/0x3f0 [ 28.827306] do_mmap+0x854/0xf00 [ 28.827569] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.827871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.828207] ksys_mmap_pgoff+0x3af/0x500 [ 28.828605] do_syscall_64+0x3f/0x90 [ 28.828967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.829480] RIP: 0033:0x7ff298d1bd82 [ 28.829839] 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 [ 28.831179] RSP: 002b:00007fff90d17c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.831689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff298d1bd82 [ 28.832164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff298155000 [ 28.832635] RBP: 00007ff298155000 R08: 0000000000000009 R09: 0000000000001000 [ 28.833108] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a123559ec0 [ 28.833576] R13: 00007fff90d17c30 R14: 00007fff90d17c60 R15: 00007fff90d17fc0 [ 28.834061] [ 28.834227] [ 28.834350] Allocated by task 215: [ 28.834592] kasan_save_stack+0x22/0x50 [ 28.834875] kasan_set_track+0x25/0x30 [ 28.835150] __kasan_slab_alloc+0x59/0x70 [ 28.835444] kmem_cache_alloc+0x16b/0x370 [ 28.835752] vm_area_dup+0x20/0x160 [ 28.836041] __split_vma+0x170/0x950 [ 28.836329] split_vma+0xc6/0x110 [ 28.836604] mprotect_fixup+0x8d2/0xb30 [ 28.836878] do_mprotect_pkey+0x87e/0xd40 [ 28.837163] __x64_sys_mprotect+0x78/0xc0 [ 28.837450] do_syscall_64+0x3f/0x90 [ 28.837722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.838077] [ 28.838197] Freed by task 215: [ 28.838414] kasan_save_stack+0x22/0x50 [ 28.838693] kasan_set_track+0x25/0x30 [ 28.838968] kasan_save_free_info+0x2b/0x50 [ 28.839262] __kasan_slab_free+0x10a/0x190 [ 28.839561] kmem_cache_free+0x10d/0x4d0 [ 28.839843] rcu_core+0x8c8/0x2860 [ 28.840091] __do_softirq+0x1b7/0x7d4 [ 28.840359] [ 28.840478] Last potentially related work creation: [ 28.840804] kasan_save_stack+0x22/0x50 [ 28.841082] __kasan_record_aux_stack+0x8e/0xa0 [ 28.841403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.841774] remove_vma+0x139/0x170 [ 28.842026] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.842334] do_vmi_munmap+0x1f1/0x2b0 [ 28.842601] __vm_munmap+0x138/0x3a0 [ 28.842860] __x64_sys_munmap+0x59/0x80 [ 28.843132] do_syscall_64+0x3f/0x90 [ 28.843394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.843762] [ 28.843887] The buggy address belongs to the object at ffff88800e496ae0 [ 28.843887] which belongs to the cache vm_area_struct of size 168 [ 28.844746] The buggy address is located 88 bytes inside of [ 28.844746] freed 168-byte region [ffff88800e496ae0, ffff88800e496b88) [ 28.845461] [ 28.845573] The buggy address belongs to the physical page: [ 28.845917] page:000000002a6d3f84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe496 [ 28.846545] memcg:ffff88801a43e101 [ 28.846803] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.847184] page_type: 0xffffffff() [ 28.847448] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.848002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a43e101 [ 28.848558] page dumped because: kasan: bad access detected [ 28.848965] [ 28.849089] Memory state around the buggy address: [ 28.849444] ffff88800e496a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.849962] ffff88800e496a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 28.850485] >ffff88800e496b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.851002] ^ [ 28.851361] ffff88800e496b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.851891] ffff88800e496c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.852414] ================================================================== [ 28.853017] Disabling lock debugging due to kernel taint [ 31.102453] BUG: Bad rss-counter state mm:00000000fb650ace type:MM_FILEPAGES val:33 [ 31.103434] BUG: Bad rss-counter state mm:00000000fb650ace type:MM_ANONPAGES val:22 [ 31.676707] BUG: Bad rss-counter state mm:00000000b53192a4 type:MM_FILEPAGES val:33 [ 31.678041] BUG: Bad rss-counter state mm:00000000b53192a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13762' (ECDSA) to the list of known hosts. 2023/06/21 05:53:14 fuzzer started 2023/06/21 05:53:14 dialing manager at localhost:36067 2023/06/21 05:53:14 checking machine... 2023/06/21 05:53:14 checking revisions... [ 32.374496] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:53:14 testing simple program... [ 32.428220] cgroup: Unknown subsys name 'net' [ 32.477771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:14 Registers: info registers vcpu 0 RAX=ffff88800cc19200 RBX=ffff88800cc19880 RCX=000000008040003a RDX=000000008040003b RSI=ffff88800cc19880 RDI=ffff888008441500 RBP=ffff8880146e7618 RSP=ffff8880146e7580 R8 =000000008040003a R9 =0000000000000000 R10=ffffea0000330640 R11=0000000080100009 R12=ffffea0000330640 R13=ffff88800cc19200 R14=000000008040003a R15=ffff888008441500 RIP=ffffffff8180973f RFL=00000242 [---Z---] 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 00007f4f871ab900 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=00007f4f865b90b0 CR3=000000000c492000 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=b74460c0d9c67e7e00000000000ae988 XMM05=c59cef40bd717b920000000000133030 XMM06=59d5b690e0af863b0000000000131ec8 XMM07=fb795ef6d65770560000000000122090 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88800ee06840 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff810acf57 RDI=ffff88800ee068c0 RBP=ffff88800ee06850 RSP=ffff888008da7a88 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=ffff88800ee06880 R15=0000000000000001 RIP=ffffffff810acf65 RFL=00000012 [----A--] 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 00007f4efb9df900 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=00007ffed142a000 CR3=000000001462c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000