syzkaller login: [ 43.690205] BUG: Bad rss-counter state mm:0000000067034749 type:MM_FILEPAGES val:33 [ 43.691600] BUG: Bad rss-counter state mm:0000000067034749 type:MM_ANONPAGES val:22 [ 43.853958] ================================================================== [ 43.854876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.855815] Read of size 8 at addr ffff88800fb9c140 by task sshd/218 [ 43.856781] [ 43.857005] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.857895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.858897] Call Trace: [ 43.859222] [ 43.859516] dump_stack_lvl+0x91/0xf0 [ 43.860014] print_report+0xcc/0x620 [ 43.860491] ? __virt_addr_valid+0x102/0x340 [ 43.861055] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.861686] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.862310] kasan_report+0xbe/0xf0 [ 43.862789] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.863414] vma_interval_tree_remove+0xc75/0xec0 [ 43.864019] vma_prepare+0xc54/0x11a0 [ 43.864505] __split_vma+0x5af/0x950 [ 43.864987] ? __pfx___split_vma+0x10/0x10 [ 43.865545] ? find_held_lock+0x2c/0x110 [ 43.866074] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.866641] ? lock_is_held_type+0x9f/0x120 [ 43.867183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.867795] ? mtree_range_walk+0x632/0x900 [ 43.868356] ? mas_walk+0x5c7/0x7c0 [ 43.868837] do_vmi_munmap+0x1f1/0x2b0 [ 43.869349] mmap_region+0x1f9/0x2660 [ 43.869856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.870373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.871091] ? __pfx_lock_acquire+0x10/0x10 [ 43.871638] ? __pfx_mmap_region+0x10/0x10 [ 43.872173] ? security_mmap_addr+0x7d/0xa0 [ 43.872719] ? get_unmapped_area+0x1f5/0x3f0 [ 43.873283] do_mmap+0x854/0xf00 [ 43.873722] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.874222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.874792] ksys_mmap_pgoff+0x3af/0x500 [ 43.875304] do_syscall_64+0x3f/0x90 [ 43.875788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.876441] RIP: 0033:0x7f83eb301d82 [ 43.876918] 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 [ 43.879080] RSP: 002b:00007ffd04e44488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.879990] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83eb301d82 [ 43.880841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83ea73b000 [ 43.881696] RBP: 00007f83ea73b000 R08: 0000000000000009 R09: 0000000000001000 [ 43.882541] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565ef6b5d90 [ 43.883399] R13: 00007ffd04e444a0 R14: 00007ffd04e444d0 R15: 00007ffd04e44830 [ 43.884261] [ 43.884556] [ 43.884772] Allocated by task 211: [ 43.885204] kasan_save_stack+0x22/0x50 [ 43.885727] kasan_set_track+0x25/0x30 [ 43.886231] __kasan_slab_alloc+0x59/0x70 [ 43.886754] kmem_cache_alloc+0x16b/0x370 [ 43.887282] vm_area_dup+0x20/0x160 [ 43.887742] __split_vma+0x170/0x950 [ 43.888203] split_vma+0xc6/0x110 [ 43.888648] mprotect_fixup+0x8d2/0xb30 [ 43.889165] do_mprotect_pkey+0x87e/0xd40 [ 43.889703] __x64_sys_mprotect+0x78/0xc0 [ 43.890239] do_syscall_64+0x3f/0x90 [ 43.890706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.891356] [ 43.891578] Freed by task 211: [ 43.891976] kasan_save_stack+0x22/0x50 [ 43.892485] kasan_set_track+0x25/0x30 [ 43.892989] kasan_save_free_info+0x2b/0x50 [ 43.893541] __kasan_slab_free+0x10a/0x190 [ 43.894087] kmem_cache_free+0x10d/0x4d0 [ 43.894612] rcu_core+0x8c8/0x2860 [ 43.895054] __do_softirq+0x1b7/0x7d4 [ 43.895538] [ 43.895763] Last potentially related work creation: [ 43.896341] kasan_save_stack+0x22/0x50 [ 43.896846] __kasan_record_aux_stack+0x8e/0xa0 [ 43.897521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.898172] remove_vma+0x139/0x170 [ 43.898620] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.899189] do_vmi_munmap+0x1f1/0x2b0 [ 43.899680] __vm_munmap+0x138/0x3a0 [ 43.900159] __x64_sys_munmap+0x59/0x80 [ 43.900664] do_syscall_64+0x3f/0x90 [ 43.901137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.901791] [ 43.902020] The buggy address belongs to the object at ffff88800fb9c0e8 [ 43.902020] which belongs to the cache vm_area_struct of size 168 [ 43.903492] The buggy address is located 88 bytes inside of [ 43.903492] freed 168-byte region [ffff88800fb9c0e8, ffff88800fb9c190) [ 43.904902] [ 43.905122] The buggy address belongs to the physical page: [ 43.905809] page:0000000095089655 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb9c [ 43.906914] memcg:ffff88800f5d1501 [ 43.907348] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.908009] page_type: 0xffffffff() [ 43.908473] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.909422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d1501 [ 43.910337] page dumped because: kasan: bad access detected [ 43.911016] [ 43.911233] Memory state around the buggy address: [ 43.911817] ffff88800fb9c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.912692] ffff88800fb9c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 43.913583] >ffff88800fb9c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.914450] ^ [ 43.915101] ffff88800fb9c180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 43.915954] ffff88800fb9c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.916812] ================================================================== [ 43.917755] Disabling lock debugging due to kernel taint [ 45.973537] BUG: Bad rss-counter state mm:00000000ed8d0cc4 type:MM_FILEPAGES val:33 [ 45.974528] BUG: Bad rss-counter state mm:00000000ed8d0cc4 type:MM_ANONPAGES val:22 [ 46.541773] BUG: Bad rss-counter state mm:000000003941c26a type:MM_FILEPAGES val:33 [ 46.542933] BUG: Bad rss-counter state mm:000000003941c26a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40230' (ECDSA) to the list of known hosts. 2023/06/20 06:32:23 fuzzer started 2023/06/20 06:32:23 dialing manager at localhost:44161 2023/06/20 06:32:23 checking machine... 2023/06/20 06:32:23 checking revisions... [ 47.200054] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:32:24 testing simple program... [ 47.243277] cgroup: Unknown subsys name 'net' [ 47.288751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:18 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=00007ffeee820b58 CR3=000000000fd04000 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=2033323a32333a3630203032206e754a XMM01=6964206465766965636552203a5d3732 XMM02=6f63736964203a31313a323735373520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613da01 RDX=1ffff11001932f5b RSI=ffffffff81847452 RDI=ffff88800c997a80 RBP=ffff88800c997ad8 RSP=ffff88800c997a10 R8 =ffffffff8613daa0 R9 =ffff88800c997ac0 R10=0000000000038001 R11=0000000000021e78 R12=ffff88800c997b48 R13=0000000000000000 R14=ffff88800efc8000 R15=ffff88800c997a80 RIP=ffffffff8113062c 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 00007f8f5080e900 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=00007f8f50dc3650 CR3=00000000141cc000 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