syzkaller login: [ 31.469347] BUG: Bad rss-counter state mm:000000004389fd5c type:MM_FILEPAGES val:33 [ 31.470370] BUG: Bad rss-counter state mm:000000004389fd5c type:MM_ANONPAGES val:22 [ 31.636389] ================================================================== [ 31.637272] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.638160] Read of size 8 at addr ffff88800ccba880 by task sshd/220 [ 31.638880] [ 31.639089] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.639994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.640909] Call Trace: [ 31.641213] [ 31.641507] dump_stack_lvl+0x91/0xf0 [ 31.641972] print_report+0xcc/0x620 [ 31.642425] ? __virt_addr_valid+0x102/0x340 [ 31.642945] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.643529] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.644113] kasan_report+0xbe/0xf0 [ 31.644569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.645163] vma_interval_tree_remove+0xc75/0xec0 [ 31.645749] vma_prepare+0xc54/0x11a0 [ 31.646210] __split_vma+0x5af/0x950 [ 31.646673] ? __pfx___split_vma+0x10/0x10 [ 31.647196] ? find_held_lock+0x2c/0x110 [ 31.647708] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.648263] ? lock_is_held_type+0x9f/0x120 [ 31.648793] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.649407] ? mtree_range_walk+0x632/0x900 [ 31.649964] ? mas_walk+0x5c7/0x7c0 [ 31.650433] do_vmi_munmap+0x1f1/0x2b0 [ 31.650915] mmap_region+0x1f9/0x2660 [ 31.651385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.651885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.652601] ? __pfx_lock_acquire+0x10/0x10 [ 31.653131] ? __pfx_mmap_region+0x10/0x10 [ 31.653675] ? security_mmap_addr+0x7d/0xa0 [ 31.654204] ? get_unmapped_area+0x1f5/0x3f0 [ 31.654748] do_mmap+0x854/0xf00 [ 31.655181] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.655669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.656224] ksys_mmap_pgoff+0x3af/0x500 [ 31.656723] do_syscall_64+0x3f/0x90 [ 31.657195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.657882] RIP: 0033:0x7f79f5fffd82 [ 31.658337] 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 [ 31.660450] RSP: 002b:00007ffc4e817c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.661355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79f5fffd82 [ 31.662233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79f5439000 [ 31.663077] RBP: 00007f79f5439000 R08: 0000000000000009 R09: 0000000000001000 [ 31.663925] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe0ad75ec0 [ 31.664761] R13: 00007ffc4e817c20 R14: 00007ffc4e817c50 R15: 00007ffc4e817fb0 [ 31.665621] [ 31.665909] [ 31.666119] Allocated by task 213: [ 31.666545] kasan_save_stack+0x22/0x50 [ 31.667046] kasan_set_track+0x25/0x30 [ 31.667526] __kasan_slab_alloc+0x59/0x70 [ 31.668054] kmem_cache_alloc+0x16b/0x370 [ 31.668580] vm_area_dup+0x20/0x160 [ 31.669025] __split_vma+0x170/0x950 [ 31.669514] split_vma+0xc6/0x110 [ 31.669950] mprotect_fixup+0x8d2/0xb30 [ 31.670443] do_mprotect_pkey+0x87e/0xd40 [ 31.670955] __x64_sys_mprotect+0x78/0xc0 [ 31.671471] do_syscall_64+0x3f/0x90 [ 31.671939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672575] [ 31.672790] Freed by task 213: [ 31.673177] kasan_save_stack+0x22/0x50 [ 31.673683] kasan_set_track+0x25/0x30 [ 31.674172] kasan_save_free_info+0x2b/0x50 [ 31.674709] __kasan_slab_free+0x10a/0x190 [ 31.675247] kmem_cache_free+0x10d/0x4d0 [ 31.675757] rcu_core+0x8c8/0x2860 [ 31.676195] __do_softirq+0x1b7/0x7d4 [ 31.676662] [ 31.676873] Last potentially related work creation: [ 31.677457] kasan_save_stack+0x22/0x50 [ 31.677977] __kasan_record_aux_stack+0x8e/0xa0 [ 31.678539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.679176] remove_vma+0x139/0x170 [ 31.679629] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.680186] do_vmi_munmap+0x1f1/0x2b0 [ 31.680659] __vm_munmap+0x138/0x3a0 [ 31.681134] __x64_sys_munmap+0x59/0x80 [ 31.681632] do_syscall_64+0x3f/0x90 [ 31.682107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.682745] [ 31.682956] The buggy address belongs to the object at ffff88800ccba828 [ 31.682956] which belongs to the cache vm_area_struct of size 168 [ 31.684426] The buggy address is located 88 bytes inside of [ 31.684426] freed 168-byte region [ffff88800ccba828, ffff88800ccba8d0) [ 31.685846] [ 31.686057] The buggy address belongs to the physical page: [ 31.686723] page:00000000c8d1d214 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccba [ 31.687828] memcg:ffff888013ff7b01 [ 31.688247] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.688893] page_type: 0xffffffff() [ 31.689339] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.690277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ff7b01 [ 31.691180] page dumped because: kasan: bad access detected [ 31.691836] [ 31.692046] Memory state around the buggy address: [ 31.692618] ffff88800ccba780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.693477] ffff88800ccba800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.694337] >ffff88800ccba880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.695179] ^ [ 31.695587] ffff88800ccba900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.696434] ffff88800ccba980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.697266] ================================================================== [ 31.698340] Disabling lock debugging due to kernel taint [ 34.296264] BUG: Bad rss-counter state mm:00000000c04201d0 type:MM_FILEPAGES val:33 [ 34.297364] BUG: Bad rss-counter state mm:00000000c04201d0 type:MM_ANONPAGES val:22 [ 34.853789] BUG: Bad rss-counter state mm:000000001cedc152 type:MM_FILEPAGES val:33 [ 34.855132] BUG: Bad rss-counter state mm:000000001cedc152 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40952' (ECDSA) to the list of known hosts. 2023/06/20 13:53:46 fuzzer started 2023/06/20 13:53:46 dialing manager at localhost:36067 2023/06/20 13:53:47 checking machine... 2023/06/20 13:53:47 checking revisions... [ 35.504817] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:53:47 testing simple program... [ 35.563570] cgroup: Unknown subsys name 'net' [ 35.621851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:46 Registers: info registers vcpu 0 RAX=ffffffff860a1445 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85d98e78 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff860a1416 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130a72 RFL=00000246 [---Z-P-] 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 00007fbc163da700 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=00007fa02b38e040 CR3=000000000e302000 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=2036343a33353a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a33353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880163f7df0 RCX=ffffffff81859c62 RDX=ffff888019bb9b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff8880163f7d80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000246 [---Z-P-] 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 00007fd9ed1f1900 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=00007ffc2b10b000 CR3=000000000fe04000 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