syzkaller login: [ 30.569151] BUG: Bad rss-counter state mm:00000000f06c61c4 type:MM_FILEPAGES val:33 [ 30.570640] BUG: Bad rss-counter state mm:00000000f06c61c4 type:MM_ANONPAGES val:22 [ 30.733424] ================================================================== [ 30.734342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.735285] Read of size 8 at addr ffff88800e2694e0 by task sshd/220 [ 30.736128] [ 30.736350] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.737214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.738183] Call Trace: [ 30.738508] [ 30.738816] dump_stack_lvl+0x91/0xf0 [ 30.739320] print_report+0xcc/0x620 [ 30.739812] ? __virt_addr_valid+0x102/0x340 [ 30.740372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740999] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741619] kasan_report+0xbe/0xf0 [ 30.742098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742734] vma_interval_tree_remove+0xc75/0xec0 [ 30.743352] vma_prepare+0xc54/0x11a0 [ 30.743827] __split_vma+0x5af/0x950 [ 30.744300] ? __pfx___split_vma+0x10/0x10 [ 30.744837] ? find_held_lock+0x2c/0x110 [ 30.745357] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745924] ? lock_is_held_type+0x9f/0x120 [ 30.746472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.747106] ? mtree_range_walk+0x632/0x900 [ 30.747667] ? mas_walk+0x5c7/0x7c0 [ 30.748148] do_vmi_munmap+0x1f1/0x2b0 [ 30.748650] mmap_region+0x1f9/0x2660 [ 30.749141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.750397] ? __pfx_lock_acquire+0x10/0x10 [ 30.750937] ? __pfx_mmap_region+0x10/0x10 [ 30.751473] ? security_mmap_addr+0x7d/0xa0 [ 30.752010] ? get_unmapped_area+0x1f5/0x3f0 [ 30.752561] do_mmap+0x854/0xf00 [ 30.753004] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.753505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.754062] ksys_mmap_pgoff+0x3af/0x500 [ 30.754583] do_syscall_64+0x3f/0x90 [ 30.755079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755730] RIP: 0033:0x7f5051271d82 [ 30.756194] 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 [ 30.758346] RSP: 002b:00007fffa0f2d028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.759257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5051271d82 [ 30.760113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50506ab000 [ 30.760980] RBP: 00007f50506ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.761836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564786dc2ec0 [ 30.762688] R13: 00007fffa0f2d040 R14: 00007fffa0f2d070 R15: 00007fffa0f2d3d0 [ 30.763561] [ 30.763854] [ 30.764073] Allocated by task 213: [ 30.764513] kasan_save_stack+0x22/0x50 [ 30.765024] kasan_set_track+0x25/0x30 [ 30.765518] __kasan_slab_alloc+0x59/0x70 [ 30.766043] kmem_cache_alloc+0x16b/0x370 [ 30.766563] vm_area_dup+0x20/0x160 [ 30.767039] __split_vma+0x170/0x950 [ 30.767510] split_vma+0xc6/0x110 [ 30.767954] mprotect_fixup+0x8d2/0xb30 [ 30.768461] do_mprotect_pkey+0x87e/0xd40 [ 30.768988] __x64_sys_mprotect+0x78/0xc0 [ 30.769523] do_syscall_64+0x3f/0x90 [ 30.770004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770654] [ 30.770877] Freed by task 203: [ 30.771283] kasan_save_stack+0x22/0x50 [ 30.771795] kasan_set_track+0x25/0x30 [ 30.772305] kasan_save_free_info+0x2b/0x50 [ 30.772833] __kasan_slab_free+0x10a/0x190 [ 30.773373] kmem_cache_free+0x10d/0x4d0 [ 30.773890] rcu_core+0x8c8/0x2860 [ 30.774341] __do_softirq+0x1b7/0x7d4 [ 30.774831] [ 30.775050] Last potentially related work creation: [ 30.775640] kasan_save_stack+0x22/0x50 [ 30.776147] __kasan_record_aux_stack+0x8e/0xa0 [ 30.776723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.777370] remove_vma+0x139/0x170 [ 30.777828] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.778395] do_vmi_munmap+0x1f1/0x2b0 [ 30.778914] __vm_munmap+0x138/0x3a0 [ 30.779378] __x64_sys_munmap+0x59/0x80 [ 30.779880] do_syscall_64+0x3f/0x90 [ 30.780360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781003] [ 30.781227] Second to last potentially related work creation: [ 30.781924] kasan_save_stack+0x22/0x50 [ 30.782430] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.783658] remove_vma+0x139/0x170 [ 30.784112] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784677] do_vmi_munmap+0x1f1/0x2b0 [ 30.785161] mmap_region+0x1f9/0x2660 [ 30.785650] do_mmap+0x854/0xf00 [ 30.786083] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.786593] ksys_mmap_pgoff+0x3af/0x500 [ 30.787133] do_syscall_64+0x3f/0x90 [ 30.787655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788433] [ 30.788695] The buggy address belongs to the object at ffff88800e269488 [ 30.788695] which belongs to the cache vm_area_struct of size 168 [ 30.790522] The buggy address is located 88 bytes inside of [ 30.790522] freed 168-byte region [ffff88800e269488, ffff88800e269530) [ 30.792240] [ 30.792500] The buggy address belongs to the physical page: [ 30.793333] page:000000006d77bea3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe269 [ 30.794682] memcg:ffff88800f5dcd01 [ 30.795241] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.796075] page_type: 0xffffffff() [ 30.796619] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7780 dead000000000003 [ 30.797625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5dcd01 [ 30.798482] page dumped because: kasan: bad access detected [ 30.799115] [ 30.799325] Memory state around the buggy address: [ 30.799872] ffff88800e269380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.800672] ffff88800e269400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.801473] >ffff88800e269480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802269] ^ [ 30.803006] ffff88800e269500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.803814] ffff88800e269580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.804611] ================================================================== [ 30.805691] Disabling lock debugging due to kernel taint [ 33.416981] BUG: Bad rss-counter state mm:000000000214723d type:MM_FILEPAGES val:33 [ 33.417981] BUG: Bad rss-counter state mm:000000000214723d type:MM_ANONPAGES val:22 [ 34.007908] BUG: Bad rss-counter state mm:00000000aa2420b5 type:MM_FILEPAGES val:33 [ 34.009068] BUG: Bad rss-counter state mm:00000000aa2420b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37881' (ECDSA) to the list of known hosts. 2023/06/20 18:33:39 fuzzer started 2023/06/20 18:33:39 dialing manager at localhost:36067 2023/06/20 18:33:39 checking machine... 2023/06/20 18:33:39 checking revisions... [ 34.666008] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:33:40 testing simple program... [ 34.706436] cgroup: Unknown subsys name 'net' [ 34.759089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:33:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffdbb83f468 CR3=000000000e502000 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=2039333a33333a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a33333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110013c9f3f RSI=ffffffff8363d4c9 RDI=ffff888009e4fa68 RBP=ffff888009e4fa38 RSP=ffff888009e4f998 R8 =0000000000000001 R9 =ffff888009e4f9e0 R10=0000000000038001 R11=000000000008aa15 R12=ffff888009e4fa68 R13=0000000000000000 R14=ffff88800c4c8000 R15=ffff88800e79c720 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007f2f2cc1b900 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=00007f2f2d1d0650 CR3=000000000c6da000 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