syzkaller login: [ 30.687811] BUG: Bad rss-counter state mm:000000004f62d7be type:MM_FILEPAGES val:33 [ 30.689109] BUG: Bad rss-counter state mm:000000004f62d7be type:MM_ANONPAGES val:22 [ 30.860191] ================================================================== [ 30.861115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.862288] Read of size 8 at addr ffff88800f03d140 by task sshd/220 [ 30.863130] [ 30.863371] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.864236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.865302] Call Trace: [ 30.865670] [ 30.865986] dump_stack_lvl+0x91/0xf0 [ 30.866531] print_report+0xcc/0x620 [ 30.867068] ? __virt_addr_valid+0x102/0x340 [ 30.867655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868944] kasan_report+0xbe/0xf0 [ 30.869517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870206] vma_interval_tree_remove+0xc75/0xec0 [ 30.870881] vma_prepare+0xc54/0x11a0 [ 30.871425] __split_vma+0x5af/0x950 [ 30.871953] ? __pfx___split_vma+0x10/0x10 [ 30.872539] ? find_held_lock+0x2c/0x110 [ 30.873117] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.873750] ? lock_is_held_type+0x9f/0x120 [ 30.874355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.875038] ? mtree_range_walk+0x632/0x900 [ 30.875647] ? mas_walk+0x5c7/0x7c0 [ 30.876178] do_vmi_munmap+0x1f1/0x2b0 [ 30.876695] mmap_region+0x1f9/0x2660 [ 30.877179] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.877692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878406] ? __pfx_lock_acquire+0x10/0x10 [ 30.878947] ? __pfx_mmap_region+0x10/0x10 [ 30.879465] ? security_mmap_addr+0x7d/0xa0 [ 30.880002] ? get_unmapped_area+0x1f5/0x3f0 [ 30.880546] do_mmap+0x854/0xf00 [ 30.880981] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.881477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.882067] ksys_mmap_pgoff+0x3af/0x500 [ 30.882581] do_syscall_64+0x3f/0x90 [ 30.883055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883693] RIP: 0033:0x7fd6bdc1dd82 [ 30.884142] 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 [ 30.886272] RSP: 002b:00007ffca13cc838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6bdc1dd82 [ 30.888014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6bd057000 [ 30.888868] RBP: 00007fd6bd057000 R08: 0000000000000009 R09: 0000000000001000 [ 30.889717] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ec87f6ec0 [ 30.890552] R13: 00007ffca13cc850 R14: 00007ffca13cc880 R15: 00007ffca13ccbe0 [ 30.891412] [ 30.891707] [ 30.891918] Allocated by task 213: [ 30.892345] kasan_save_stack+0x22/0x50 [ 30.892856] kasan_set_track+0x25/0x30 [ 30.893345] __kasan_slab_alloc+0x59/0x70 [ 30.893882] kmem_cache_alloc+0x16b/0x370 [ 30.894392] vm_area_dup+0x20/0x160 [ 30.894843] __split_vma+0x170/0x950 [ 30.895306] split_vma+0xc6/0x110 [ 30.895748] mprotect_fixup+0x8d2/0xb30 [ 30.896249] do_mprotect_pkey+0x87e/0xd40 [ 30.896780] __x64_sys_mprotect+0x78/0xc0 [ 30.897289] do_syscall_64+0x3f/0x90 [ 30.897776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898420] [ 30.898634] Freed by task 213: [ 30.899027] kasan_save_stack+0x22/0x50 [ 30.899536] kasan_set_track+0x25/0x30 [ 30.900026] kasan_save_free_info+0x2b/0x50 [ 30.900551] __kasan_slab_free+0x10a/0x190 [ 30.901086] kmem_cache_free+0x10d/0x4d0 [ 30.901613] rcu_core+0x8c8/0x2860 [ 30.902058] __do_softirq+0x1b7/0x7d4 [ 30.902543] [ 30.902762] Last potentially related work creation: [ 30.903346] kasan_save_stack+0x22/0x50 [ 30.903886] __kasan_record_aux_stack+0x8e/0xa0 [ 30.904457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905099] remove_vma+0x139/0x170 [ 30.905553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906106] do_vmi_munmap+0x1f1/0x2b0 [ 30.906593] __vm_munmap+0x138/0x3a0 [ 30.907067] __x64_sys_munmap+0x59/0x80 [ 30.907570] do_syscall_64+0x3f/0x90 [ 30.908049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.908697] [ 30.908913] The buggy address belongs to the object at ffff88800f03d0e8 [ 30.908913] which belongs to the cache vm_area_struct of size 168 [ 30.910416] The buggy address is located 88 bytes inside of [ 30.910416] freed 168-byte region [ffff88800f03d0e8, ffff88800f03d190) [ 30.911832] [ 30.912047] The buggy address belongs to the physical page: [ 30.912722] page:00000000a456187d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf03d [ 30.913814] memcg:ffff88801032f301 [ 30.914246] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.914897] page_type: 0xffffffff() [ 30.915356] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.916276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801032f301 [ 30.917187] page dumped because: kasan: bad access detected [ 30.917868] [ 30.918090] Memory state around the buggy address: [ 30.918682] ffff88800f03d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.919534] ffff88800f03d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.920421] >ffff88800f03d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.921286] ^ [ 30.921938] ffff88800f03d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.922806] ffff88800f03d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.923663] ================================================================== [ 30.924593] Disabling lock debugging due to kernel taint [ 32.904754] BUG: Bad rss-counter state mm:0000000094c39f62 type:MM_FILEPAGES val:33 [ 32.906028] BUG: Bad rss-counter state mm:0000000094c39f62 type:MM_ANONPAGES val:22 [ 33.454948] BUG: Bad rss-counter state mm:00000000eb5a8551 type:MM_FILEPAGES val:33 [ 33.456103] BUG: Bad rss-counter state mm:00000000eb5a8551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19575' (ECDSA) to the list of known hosts. 2023/06/20 23:11:48 fuzzer started 2023/06/20 23:11:48 dialing manager at localhost:36067 2023/06/20 23:11:48 checking machine... 2023/06/20 23:11:48 checking revisions... [ 34.089596] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:11:48 testing simple program... [ 34.145089] cgroup: Unknown subsys name 'net' [ 34.196502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:47 Registers: info registers vcpu 0 RAX=ffffffff813ad6a8 RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7fc RSP=ffff888016627490 R8 =ffffffff860d8256 R9 =ffff888016627588 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007fc2f6223700 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=00007fb6d192e618 CR3=000000000f4f0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34313338332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343133 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb92e95fe00 CR3=000000000eb68000 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=00000000000000000000000000000000 XMM01=9f9834af5d7f28a1ee4b41a8edf19138 XMM02=000000000011daa0ec2efd57dc4c00df XMM03=00000000001222405cee05e3b030c43e XMM04=716c903fddc55ad900000000000ae988 XMM05=19e9129bd510f23500000000001320b0 XMM06=3c858b080aa7a98e0000000000130f18 XMM07=e042d86d42eb936e00000000001224c0 XMM08=5cee05e3b030c43e000000000011db00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000