syzkaller login: [ 30.823347] sshd (214) used greatest stack depth: 24128 bytes left [ 30.823935] BUG: Bad rss-counter state mm:000000005361a65c type:MM_FILEPAGES val:33 [ 30.824718] BUG: Bad rss-counter state mm:000000005361a65c type:MM_ANONPAGES val:22 [ 30.956013] ================================================================== [ 30.956683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.957394] Read of size 8 at addr ffff88801a294ed8 by task sshd/222 [ 30.957915] [ 30.958057] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.958635] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.959292] Call Trace: [ 30.959515] [ 30.959901] dump_stack_lvl+0x91/0xf0 [ 30.960237] print_report+0xcc/0x620 [ 30.960576] ? __virt_addr_valid+0x102/0x340 [ 30.960949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961802] kasan_report+0xbe/0xf0 [ 30.962165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.962604] vma_interval_tree_remove+0xc75/0xec0 [ 30.963013] vma_prepare+0xc54/0x11a0 [ 30.963343] __split_vma+0x5af/0x950 [ 30.963661] ? __pfx___split_vma+0x10/0x10 [ 30.964010] ? find_held_lock+0x2c/0x110 [ 30.964366] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.964749] ? lock_is_held_type+0x9f/0x120 [ 30.965177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.965596] ? mtree_range_walk+0x632/0x900 [ 30.965967] ? mas_walk+0x5c7/0x7c0 [ 30.966275] do_vmi_munmap+0x1f1/0x2b0 [ 30.966604] mmap_region+0x1f9/0x2660 [ 30.966921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.967257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.967723] ? __pfx_lock_acquire+0x10/0x10 [ 30.968087] ? __pfx_mmap_region+0x10/0x10 [ 30.968454] ? security_mmap_addr+0x7d/0xa0 [ 30.968808] ? get_unmapped_area+0x1f5/0x3f0 [ 30.969247] do_mmap+0x854/0xf00 [ 30.969538] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.969873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.970259] ksys_mmap_pgoff+0x3af/0x500 [ 30.970604] do_syscall_64+0x3f/0x90 [ 30.970931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971368] RIP: 0033:0x7f1ccc480d82 [ 30.971668] 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 [ 30.973104] RSP: 002b:00007ffcf21715e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.973738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ccc480d82 [ 30.974302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ccb8ba000 [ 30.974865] RBP: 00007f1ccb8ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.975440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563011ff4ec0 [ 30.976018] R13: 00007ffcf2171600 R14: 00007ffcf2171630 R15: 00007ffcf2171990 [ 30.976581] [ 30.976774] [ 30.976915] Allocated by task 214: [ 30.977247] kasan_save_stack+0x22/0x50 [ 30.977608] kasan_set_track+0x25/0x30 [ 30.977932] __kasan_slab_alloc+0x59/0x70 [ 30.978268] kmem_cache_alloc+0x16b/0x370 [ 30.978609] vm_area_dup+0x20/0x160 [ 30.978913] __split_vma+0x170/0x950 [ 30.979223] split_vma+0xc6/0x110 [ 30.979511] mprotect_fixup+0x8d2/0xb30 [ 30.979851] do_mprotect_pkey+0x87e/0xd40 [ 30.980190] __x64_sys_mprotect+0x78/0xc0 [ 30.980544] do_syscall_64+0x3f/0x90 [ 30.980857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.981318] [ 30.981471] Freed by task 13: [ 30.981728] kasan_save_stack+0x22/0x50 [ 30.982056] kasan_set_track+0x25/0x30 [ 30.982394] kasan_save_free_info+0x2b/0x50 [ 30.982745] __kasan_slab_free+0x10a/0x190 [ 30.983108] kmem_cache_free+0x10d/0x4d0 [ 30.983444] rcu_core+0x8c8/0x2860 [ 30.983747] __do_softirq+0x1b7/0x7d4 [ 30.984059] [ 30.984198] Last potentially related work creation: [ 30.984592] kasan_save_stack+0x22/0x50 [ 30.984921] __kasan_record_aux_stack+0x8e/0xa0 [ 30.985316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.985748] remove_vma+0x139/0x170 [ 30.986056] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.986444] do_vmi_munmap+0x1f1/0x2b0 [ 30.986767] __vm_munmap+0x138/0x3a0 [ 30.987084] __x64_sys_munmap+0x59/0x80 [ 30.987451] do_syscall_64+0x3f/0x90 [ 30.987760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988181] [ 30.988352] The buggy address belongs to the object at ffff88801a294e80 [ 30.988352] which belongs to the cache vm_area_struct of size 168 [ 30.989425] The buggy address is located 88 bytes inside of [ 30.989425] freed 168-byte region [ffff88801a294e80, ffff88801a294f28) [ 30.990382] [ 30.990547] The buggy address belongs to the physical page: [ 30.990995] page:0000000047fe87f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a294 [ 30.991722] memcg:ffff88800e44a701 [ 30.992006] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.992458] page_type: 0xffffffff() [ 30.992757] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.993395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e44a701 [ 30.994009] page dumped because: kasan: bad access detected [ 30.994458] [ 30.994609] Memory state around the buggy address: [ 30.995012] ffff88801a294d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.995595] ffff88801a294e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.996164] >ffff88801a294e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996775] ^ [ 30.997305] ffff88801a294f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.997866] ffff88801a294f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.998476] ================================================================== [ 30.999176] Disabling lock debugging due to kernel taint [ 32.464486] BUG: Bad rss-counter state mm:000000008eab8ee0 type:MM_FILEPAGES val:33 [ 32.465886] BUG: Bad rss-counter state mm:000000008eab8ee0 type:MM_ANONPAGES val:22 [ 32.857316] BUG: Bad rss-counter state mm:00000000f6fc8352 type:MM_FILEPAGES val:33 [ 32.857970] BUG: Bad rss-counter state mm:00000000f6fc8352 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55971' (ECDSA) to the list of known hosts. 2023/06/20 08:26:54 fuzzer started 2023/06/20 08:26:54 dialing manager at localhost:44161 2023/06/20 08:26:54 checking machine... 2023/06/20 08:26:54 checking revisions... [ 33.417397] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:26:54 testing simple program... [ 33.465519] cgroup: Unknown subsys name 'net' [ 33.511938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:26:54 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137008 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff81130bd6 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 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=00007ffd90421a88 CR3=000000000e576000 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=2034353a36323a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888019ddfdb0 RDI=ffff888019ddfe00 RBP=ffff888019ddfe00 RSP=ffff888019ddfcf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019ddfdb0 R13=ffff888019ddfdc8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8162eff4 RFL=00000293 [--S-A-C] 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 00007f23e4495900 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=00007f23e4a4d0b0 CR3=000000000e3f4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000