syzkaller login: [ 31.650699] BUG: Bad rss-counter state mm:00000000e23e188b type:MM_FILEPAGES val:33 [ 31.651711] BUG: Bad rss-counter state mm:00000000e23e188b type:MM_ANONPAGES val:22 [ 31.831015] ================================================================== [ 31.831930] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.832872] Read of size 8 at addr ffff888016fe5798 by task sshd/221 [ 31.833642] [ 31.833872] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.834728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.835713] Call Trace: [ 31.836035] [ 31.836319] dump_stack_lvl+0x91/0xf0 [ 31.836812] print_report+0xcc/0x620 [ 31.837304] ? __virt_addr_valid+0x102/0x340 [ 31.837876] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.838493] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.839174] kasan_report+0xbe/0xf0 [ 31.839661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.840278] vma_interval_tree_remove+0xc75/0xec0 [ 31.840872] vma_prepare+0xc54/0x11a0 [ 31.841376] __split_vma+0x5af/0x950 [ 31.841859] ? __pfx___split_vma+0x10/0x10 [ 31.842391] ? find_held_lock+0x2c/0x110 [ 31.842910] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.843472] ? lock_is_held_type+0x9f/0x120 [ 31.844004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.844609] ? mtree_range_walk+0x632/0x900 [ 31.845164] ? mas_walk+0x5c7/0x7c0 [ 31.845643] do_vmi_munmap+0x1f1/0x2b0 [ 31.846157] mmap_region+0x1f9/0x2660 [ 31.846640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.847153] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.847865] ? __pfx_lock_acquire+0x10/0x10 [ 31.848402] ? __pfx_mmap_region+0x10/0x10 [ 31.848929] ? security_mmap_addr+0x7d/0xa0 [ 31.849459] ? get_unmapped_area+0x1f5/0x3f0 [ 31.850017] do_mmap+0x854/0xf00 [ 31.850457] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.850952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.851519] ksys_mmap_pgoff+0x3af/0x500 [ 31.852021] do_syscall_64+0x3f/0x90 [ 31.852499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.853145] RIP: 0033:0x7efdc8f9ed82 [ 31.853603] 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 [ 31.855746] RSP: 002b:00007fff08924378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.856655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdc8f9ed82 [ 31.857500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdc83d8000 [ 31.858357] RBP: 00007efdc83d8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.859193] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a6b400ec0 [ 31.860042] R13: 00007fff08924390 R14: 00007fff089243c0 R15: 00007fff08924720 [ 31.860890] [ 31.861179] [ 31.861397] Allocated by task 214: [ 31.861835] kasan_save_stack+0x22/0x50 [ 31.862347] kasan_set_track+0x25/0x30 [ 31.862842] __kasan_slab_alloc+0x59/0x70 [ 31.863359] kmem_cache_alloc+0x16b/0x370 [ 31.863874] vm_area_dup+0x20/0x160 [ 31.864331] __split_vma+0x170/0x950 [ 31.864795] split_vma+0xc6/0x110 [ 31.865240] mprotect_fixup+0x8d2/0xb30 [ 31.865745] do_mprotect_pkey+0x87e/0xd40 [ 31.866292] __x64_sys_mprotect+0x78/0xc0 [ 31.866810] do_syscall_64+0x3f/0x90 [ 31.867280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.867920] [ 31.868134] Freed by task 204: [ 31.868527] kasan_save_stack+0x22/0x50 [ 31.869025] kasan_set_track+0x25/0x30 [ 31.869511] kasan_save_free_info+0x2b/0x50 [ 31.870046] __kasan_slab_free+0x10a/0x190 [ 31.870581] kmem_cache_free+0x10d/0x4d0 [ 31.871084] rcu_core+0x8c8/0x2860 [ 31.871534] __do_softirq+0x1b7/0x7d4 [ 31.872012] [ 31.872229] Last potentially related work creation: [ 31.872816] kasan_save_stack+0x22/0x50 [ 31.873327] __kasan_record_aux_stack+0x8e/0xa0 [ 31.873911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.874550] remove_vma+0x139/0x170 [ 31.875003] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.875557] do_vmi_munmap+0x1f1/0x2b0 [ 31.876039] __vm_munmap+0x138/0x3a0 [ 31.876508] __x64_sys_munmap+0x59/0x80 [ 31.876998] do_syscall_64+0x3f/0x90 [ 31.877469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878127] [ 31.878345] The buggy address belongs to the object at ffff888016fe5740 [ 31.878345] which belongs to the cache vm_area_struct of size 168 [ 31.879812] The buggy address is located 88 bytes inside of [ 31.879812] freed 168-byte region [ffff888016fe5740, ffff888016fe57e8) [ 31.881217] [ 31.881435] The buggy address belongs to the physical page: [ 31.882113] page:0000000088aa4595 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fe5 [ 31.883211] memcg:ffff88801a05b901 [ 31.883635] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.884276] page_type: 0xffffffff() [ 31.884725] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.885633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a05b901 [ 31.886539] page dumped because: kasan: bad access detected [ 31.887190] [ 31.887404] Memory state around the buggy address: [ 31.887991] ffff888016fe5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.888847] ffff888016fe5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.889699] >ffff888016fe5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.890554] ^ [ 31.891049] ffff888016fe5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.891902] ffff888016fe5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.892748] ================================================================== [ 31.893693] Disabling lock debugging due to kernel taint [ 33.971379] BUG: Bad rss-counter state mm:00000000a605e51c type:MM_FILEPAGES val:33 [ 33.972442] BUG: Bad rss-counter state mm:00000000a605e51c type:MM_ANONPAGES val:22 [ 34.643241] BUG: Bad rss-counter state mm:00000000b762f990 type:MM_FILEPAGES val:33 [ 34.644663] BUG: Bad rss-counter state mm:00000000b762f990 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59951' (ECDSA) to the list of known hosts. 2023/06/20 10:42:37 fuzzer started 2023/06/20 10:42:38 dialing manager at localhost:44161 2023/06/20 10:42:38 checking machine... 2023/06/20 10:42:38 checking revisions... [ 35.332335] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:42:38 testing simple program... [ 35.382680] cgroup: Unknown subsys name 'net' [ 35.445631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:42:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f167902a01c CR3=000000001850c000 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=32343a3031203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037333a3234 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363430 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=1ffff110011ae386 RBX=ffff888016ef9bc0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88806cf39500 RBP=0000000000000000 RSP=ffff88806cf09e00 R8 =ffff888008d71c40 R9 =ffffed1002ddf368 R10=ffff888016ef9b47 R11=0000000000000001 R12=dffffc0000000000 R13=ffff88806cf395c0 R14=ffff88806cf39500 R15=ffff888016ef9b40 RIP=ffffffff8125352b 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 00007f1679076900 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=00007f167962e0b0 CR3=000000000ca7a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000