syzkaller login: [ 31.097687] BUG: Bad rss-counter state mm:000000003f0ad908 type:MM_FILEPAGES val:33 [ 31.099132] BUG: Bad rss-counter state mm:000000003f0ad908 type:MM_ANONPAGES val:22 [ 31.245522] ================================================================== [ 31.246632] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.247736] Read of size 8 at addr ffff88800df02d08 by task sshd/219 [ 31.248746] [ 31.249003] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.250024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.251180] Call Trace: [ 31.251498] [ 31.251785] dump_stack_lvl+0x91/0xf0 [ 31.252277] print_report+0xcc/0x620 [ 31.252766] ? __virt_addr_valid+0x102/0x340 [ 31.253319] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253933] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254557] kasan_report+0xbe/0xf0 [ 31.255054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255690] vma_interval_tree_remove+0xc75/0xec0 [ 31.256304] vma_prepare+0xc54/0x11a0 [ 31.256786] __split_vma+0x5af/0x950 [ 31.257267] ? __pfx___split_vma+0x10/0x10 [ 31.257802] ? find_held_lock+0x2c/0x110 [ 31.258326] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.258910] ? lock_is_held_type+0x9f/0x120 [ 31.259451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.260066] ? mtree_range_walk+0x632/0x900 [ 31.260623] ? mas_walk+0x5c7/0x7c0 [ 31.261100] do_vmi_munmap+0x1f1/0x2b0 [ 31.261594] mmap_region+0x1f9/0x2660 [ 31.262084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.262618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.263337] ? __pfx_lock_acquire+0x10/0x10 [ 31.263882] ? __pfx_mmap_region+0x10/0x10 [ 31.264421] ? security_mmap_addr+0x7d/0xa0 [ 31.264968] ? get_unmapped_area+0x1f5/0x3f0 [ 31.265526] do_mmap+0x854/0xf00 [ 31.265970] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.266471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.267057] ksys_mmap_pgoff+0x3af/0x500 [ 31.267566] do_syscall_64+0x3f/0x90 [ 31.268041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.268708] RIP: 0033:0x7f4844b3ed82 [ 31.269163] 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 [ 31.271348] RSP: 002b:00007fff2607b028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.272266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4844b3ed82 [ 31.273111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4843f78000 [ 31.273963] RBP: 00007f4843f78000 R08: 0000000000000009 R09: 0000000000001000 [ 31.274823] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bdf9e8ec0 [ 31.275685] R13: 00007fff2607b040 R14: 00007fff2607b070 R15: 00007fff2607b3d0 [ 31.276554] [ 31.276844] [ 31.277057] Allocated by task 212: [ 31.277503] kasan_save_stack+0x22/0x50 [ 31.278004] kasan_set_track+0x25/0x30 [ 31.278500] __kasan_slab_alloc+0x59/0x70 [ 31.279026] kmem_cache_alloc+0x16b/0x370 [ 31.279548] vm_area_dup+0x20/0x160 [ 31.280008] __split_vma+0x170/0x950 [ 31.280477] split_vma+0xc6/0x110 [ 31.280922] mprotect_fixup+0x8d2/0xb30 [ 31.281429] do_mprotect_pkey+0x87e/0xd40 [ 31.281960] __x64_sys_mprotect+0x78/0xc0 [ 31.282486] do_syscall_64+0x3f/0x90 [ 31.282982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283628] [ 31.283844] Freed by task 212: [ 31.284242] kasan_save_stack+0x22/0x50 [ 31.284745] kasan_set_track+0x25/0x30 [ 31.285257] kasan_save_free_info+0x2b/0x50 [ 31.285799] __kasan_slab_free+0x10a/0x190 [ 31.286338] kmem_cache_free+0x10d/0x4d0 [ 31.286853] rcu_core+0x8c8/0x2860 [ 31.287302] __do_softirq+0x1b7/0x7d4 [ 31.287792] [ 31.288009] Last potentially related work creation: [ 31.288596] kasan_save_stack+0x22/0x50 [ 31.289105] __kasan_record_aux_stack+0x8e/0xa0 [ 31.289689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.290340] remove_vma+0x139/0x170 [ 31.290802] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.291365] do_vmi_munmap+0x1f1/0x2b0 [ 31.291858] __vm_munmap+0x138/0x3a0 [ 31.292338] __x64_sys_munmap+0x59/0x80 [ 31.292836] do_syscall_64+0x3f/0x90 [ 31.293316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293958] [ 31.294177] Second to last potentially related work creation: [ 31.294881] kasan_save_stack+0x22/0x50 [ 31.295391] __kasan_record_aux_stack+0x8e/0xa0 [ 31.295975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296628] remove_vma+0x139/0x170 [ 31.297080] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297647] do_vmi_munmap+0x1f1/0x2b0 [ 31.298133] mmap_region+0x1f9/0x2660 [ 31.298630] do_mmap+0x854/0xf00 [ 31.299073] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299580] ksys_mmap_pgoff+0x3af/0x500 [ 31.300080] do_syscall_64+0x3f/0x90 [ 31.300555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301201] [ 31.301414] The buggy address belongs to the object at ffff88800df02cb0 [ 31.301414] which belongs to the cache vm_area_struct of size 168 [ 31.302925] The buggy address is located 88 bytes inside of [ 31.302925] freed 168-byte region [ffff88800df02cb0, ffff88800df02d58) [ 31.304348] [ 31.304568] The buggy address belongs to the physical page: [ 31.305234] page:000000004691c568 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf02 [ 31.306321] memcg:ffff88800e118201 [ 31.306758] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307479] page_type: 0xffffffff() [ 31.307939] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d680 dead000000000005 [ 31.308883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e118201 [ 31.309824] page dumped because: kasan: bad access detected [ 31.310493] [ 31.310719] Memory state around the buggy address: [ 31.311305] ffff88800df02c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.312180] ffff88800df02c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.313043] >ffff88800df02d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.313905] ^ [ 31.314357] ffff88800df02d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.315232] ffff88800df02e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.316095] ================================================================== [ 31.317092] Disabling lock debugging due to kernel taint [ 33.210534] BUG: Bad rss-counter state mm:0000000021aefdfa type:MM_FILEPAGES val:33 [ 33.211565] BUG: Bad rss-counter state mm:0000000021aefdfa type:MM_ANONPAGES val:22 [ 33.682940] BUG: Bad rss-counter state mm:0000000040767cc9 type:MM_FILEPAGES val:33 [ 33.684041] BUG: Bad rss-counter state mm:0000000040767cc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35762' (ECDSA) to the list of known hosts. 2023/06/21 05:45:55 fuzzer started 2023/06/21 05:45:55 dialing manager at localhost:36067 2023/06/21 05:45:55 checking machine... 2023/06/21 05:45:55 checking revisions... [ 34.419229] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:45:55 testing simple program... [ 34.461789] cgroup: Unknown subsys name 'net' [ 34.504344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:55 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000001d9537f7 RCX=ffff88806c69bfb8 RDX=000000000000000b RSI=0000000000000001 RDI=00000000150cee85 RBP=ffff88800ca8c810 RSP=ffff88801cd8f630 R8 =000000001d108039 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff88801cd8f6b8 R15=000000000000000b RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f2734598900 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=00007ffcc7dcf000 CR3=0000000019308000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=0000000000000001 RDX=1ffff110011c1a57 RSI=ffff888008e0d240 RDI=ffff88806cf395c0 RBP=ffff888008d91bc0 RSP=ffff888008e37d10 R8 =ffff88806cf395c0 R9 =ffff888008d91c38 R10=0000000000000000 R11=0000000000000001 R12=ffff888008d91b40 R13=ffff888008e0d1c0 R14=ffff888008e0d240 R15=ffff88806cf395c0 RIP=ffffffff8125b03a RFL=00000046 [---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 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=00007f3310c4be10 CR3=00000000102e4000 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=2035353a35343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35343a3530203132 XMM08=64696720303d64697520612f6e3d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000