syzkaller login: [ 33.167375] BUG: Bad rss-counter state mm:0000000049a569a3 type:MM_FILEPAGES val:33 [ 33.169353] BUG: Bad rss-counter state mm:0000000049a569a3 type:MM_ANONPAGES val:22 [ 33.329878] ================================================================== [ 33.330902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.331875] Read of size 8 at addr ffff88800de9c4e0 by task sshd/221 [ 33.332790] [ 33.333019] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.333924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.334966] Call Trace: [ 33.335306] [ 33.335605] dump_stack_lvl+0x91/0xf0 [ 33.336114] print_report+0xcc/0x620 [ 33.336619] ? __virt_addr_valid+0x102/0x340 [ 33.337212] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.337855] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.338510] kasan_report+0xbe/0xf0 [ 33.339006] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.339652] vma_interval_tree_remove+0xc75/0xec0 [ 33.340284] vma_prepare+0xc54/0x11a0 [ 33.340788] __split_vma+0x5af/0x950 [ 33.341288] ? __pfx___split_vma+0x10/0x10 [ 33.341839] ? find_held_lock+0x2c/0x110 [ 33.342386] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.342972] ? lock_is_held_type+0x9f/0x120 [ 33.343531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.344161] ? mtree_range_walk+0x632/0x900 [ 33.344739] ? mas_walk+0x5c7/0x7c0 [ 33.345239] do_vmi_munmap+0x1f1/0x2b0 [ 33.345750] mmap_region+0x1f9/0x2660 [ 33.346256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.346786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.347537] ? __pfx_lock_acquire+0x10/0x10 [ 33.348092] ? __pfx_mmap_region+0x10/0x10 [ 33.348672] ? security_mmap_addr+0x7d/0xa0 [ 33.349242] ? get_unmapped_area+0x1f5/0x3f0 [ 33.349816] do_mmap+0x854/0xf00 [ 33.350282] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.350794] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.351380] ksys_mmap_pgoff+0x3af/0x500 [ 33.351907] do_syscall_64+0x3f/0x90 [ 33.352406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.353085] RIP: 0033:0x7fb807b37d82 [ 33.353574] 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 [ 33.355808] RSP: 002b:00007ffc0240e6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.356757] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb807b37d82 [ 33.357654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb806f71000 [ 33.358543] RBP: 00007fb806f71000 R08: 0000000000000009 R09: 0000000000001000 [ 33.359428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c57bbc0980 [ 33.360313] R13: 00007ffc0240e6e0 R14: 00007ffc0240e710 R15: 00007ffc0240ea70 [ 33.361219] [ 33.361527] [ 33.361752] Allocated by task 214: [ 33.362198] kasan_save_stack+0x22/0x50 [ 33.362725] kasan_set_track+0x25/0x30 [ 33.363237] __kasan_slab_alloc+0x59/0x70 [ 33.363778] kmem_cache_alloc+0x16b/0x370 [ 33.364313] vm_area_dup+0x20/0x160 [ 33.364794] __split_vma+0x170/0x950 [ 33.365289] split_vma+0xc6/0x110 [ 33.365747] mprotect_fixup+0x8d2/0xb30 [ 33.366276] do_mprotect_pkey+0x87e/0xd40 [ 33.366816] __x64_sys_mprotect+0x78/0xc0 [ 33.367365] do_syscall_64+0x3f/0x90 [ 33.367857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.368539] [ 33.368765] Freed by task 214: [ 33.369176] kasan_save_stack+0x22/0x50 [ 33.369720] kasan_set_track+0x25/0x30 [ 33.370238] kasan_save_free_info+0x2b/0x50 [ 33.370794] __kasan_slab_free+0x10a/0x190 [ 33.371353] kmem_cache_free+0x10d/0x4d0 [ 33.371880] rcu_core+0x8c8/0x2860 [ 33.372351] __do_softirq+0x1b7/0x7d4 [ 33.372845] [ 33.373068] Last potentially related work creation: [ 33.373697] kasan_save_stack+0x22/0x50 [ 33.374228] __kasan_record_aux_stack+0x8e/0xa0 [ 33.374824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.375494] remove_vma+0x139/0x170 [ 33.375967] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.376549] do_vmi_munmap+0x1f1/0x2b0 [ 33.377057] __vm_munmap+0x138/0x3a0 [ 33.377553] __x64_sys_munmap+0x59/0x80 [ 33.378072] do_syscall_64+0x3f/0x90 [ 33.378569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.379233] [ 33.379458] Second to last potentially related work creation: [ 33.380172] kasan_save_stack+0x22/0x50 [ 33.380692] __kasan_record_aux_stack+0x8e/0xa0 [ 33.381316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.381984] remove_vma+0x139/0x170 [ 33.382455] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.383035] do_vmi_munmap+0x1f1/0x2b0 [ 33.383540] mmap_region+0x1f9/0x2660 [ 33.384035] do_mmap+0x854/0xf00 [ 33.384485] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.384993] ksys_mmap_pgoff+0x3af/0x500 [ 33.385531] do_syscall_64+0x3f/0x90 [ 33.386028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.386706] [ 33.386929] The buggy address belongs to the object at ffff88800de9c488 [ 33.386929] which belongs to the cache vm_area_struct of size 168 [ 33.388469] The buggy address is located 88 bytes inside of [ 33.388469] freed 168-byte region [ffff88800de9c488, ffff88800de9c530) [ 33.389953] [ 33.390179] The buggy address belongs to the physical page: [ 33.390873] page:00000000a465e09b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde9c [ 33.392007] memcg:ffff88800ed17201 [ 33.392453] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.393197] page_type: 0xffffffff() [ 33.393676] raw: 0100000000000200 ffff88800879fc80 ffffea0000367500 dead000000000009 [ 33.394673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed17201 [ 33.395633] page dumped because: kasan: bad access detected [ 33.396322] [ 33.396544] Memory state around the buggy address: [ 33.397148] ffff88800de9c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.398062] ffff88800de9c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.398959] >ffff88800de9c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.399853] ^ [ 33.400640] ffff88800de9c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.401565] ffff88800de9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.402447] ================================================================== [ 33.403465] Disabling lock debugging due to kernel taint [ 35.431276] BUG: Bad rss-counter state mm:000000002372b8fe type:MM_FILEPAGES val:33 [ 35.432269] BUG: Bad rss-counter state mm:000000002372b8fe type:MM_ANONPAGES val:22 [ 35.939432] BUG: Bad rss-counter state mm:00000000b20e40e8 type:MM_FILEPAGES val:33 [ 35.940703] BUG: Bad rss-counter state mm:00000000b20e40e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38766' (ECDSA) to the list of known hosts. 2023/06/19 22:45:03 fuzzer started 2023/06/19 22:45:03 dialing manager at localhost:44161 2023/06/19 22:45:03 checking machine... 2023/06/19 22:45:03 checking revisions... [ 36.654132] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:45:04 testing simple program... [ 36.697741] cgroup: Unknown subsys name 'net' [ 36.756051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83684e2e RDX=ffff88800ffdd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880189cd780 RSP=ffff888014567998 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880189cd85c R13=ffff88800902ddc0 R14=ffff888014567a88 R15=ffff8880189cd780 RIP=ffffffff814c07e4 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 00007f9357695700 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=0000561a3a84a790 CR3=0000000017f9a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732033303a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e134b RSI=ffff88800f31fd28 RDI=ffff88806cf09a58 RBP=ffff88800f31fd28 RSP=ffff88806cf099a8 R8 =ffffffff86137cb0 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000008 R13=ffff88806cf09a98 R14=ffff88800f31fd30 R15=ffff88806cf09a50 RIP=ffffffff81130445 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 00007fa4ef9f7900 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=00007fa4effaf0b0 CR3=000000000ca0c000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000