syzkaller login: [ 30.861132] BUG: Bad rss-counter state mm:0000000024f9fd08 type:MM_FILEPAGES val:33 [ 30.862386] BUG: Bad rss-counter state mm:0000000024f9fd08 type:MM_ANONPAGES val:22 [ 30.900376] ================================================================== [ 30.901301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.902273] Read of size 8 at addr ffff888016743a50 by task sshd/220 [ 30.903250] [ 30.903471] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.904364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.905388] Call Trace: [ 30.905720] [ 30.906020] dump_stack_lvl+0x91/0xf0 [ 30.906522] print_report+0xcc/0x620 [ 30.907053] ? __virt_addr_valid+0x102/0x340 [ 30.907614] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908877] kasan_report+0xbe/0xf0 [ 30.909378] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.910005] vma_interval_tree_remove+0xc75/0xec0 [ 30.910628] vma_prepare+0xc54/0x11a0 [ 30.911117] __split_vma+0x5af/0x950 [ 30.911597] ? __pfx___split_vma+0x10/0x10 [ 30.912126] ? find_held_lock+0x2c/0x110 [ 30.912652] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.913225] ? lock_is_held_type+0x9f/0x120 [ 30.913774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.914395] ? mtree_range_walk+0x632/0x900 [ 30.914968] ? mas_walk+0x5c7/0x7c0 [ 30.915450] do_vmi_munmap+0x1f1/0x2b0 [ 30.915946] mmap_region+0x1f9/0x2660 [ 30.916441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.916959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.917696] ? __pfx_lock_acquire+0x10/0x10 [ 30.918246] ? __pfx_mmap_region+0x10/0x10 [ 30.918809] ? security_mmap_addr+0x7d/0xa0 [ 30.919352] ? get_unmapped_area+0x1f5/0x3f0 [ 30.919916] do_mmap+0x854/0xf00 [ 30.920367] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.920873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.921441] ksys_mmap_pgoff+0x3af/0x500 [ 30.921952] do_syscall_64+0x3f/0x90 [ 30.922436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923110] RIP: 0033:0x7f5f0ffccd82 [ 30.923569] 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 [ 30.925713] RSP: 002b:00007ffef91c3988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.926648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f0ffccd82 [ 30.927511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f0f406000 [ 30.928394] RBP: 00007f5f0f406000 R08: 0000000000000009 R09: 0000000000001000 [ 30.929250] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b734450d90 [ 30.930098] R13: 00007ffef91c39a0 R14: 00007ffef91c39d0 R15: 00007ffef91c3d30 [ 30.930983] [ 30.931280] [ 30.931499] Allocated by task 213: [ 30.931931] kasan_save_stack+0x22/0x50 [ 30.932451] kasan_set_track+0x25/0x30 [ 30.932955] __kasan_slab_alloc+0x59/0x70 [ 30.933481] kmem_cache_alloc+0x16b/0x370 [ 30.934015] vm_area_dup+0x20/0x160 [ 30.934476] __split_vma+0x170/0x950 [ 30.934958] split_vma+0xc6/0x110 [ 30.935409] mprotect_fixup+0x8d2/0xb30 [ 30.935919] do_mprotect_pkey+0x87e/0xd40 [ 30.936453] __x64_sys_mprotect+0x78/0xc0 [ 30.936981] do_syscall_64+0x3f/0x90 [ 30.937458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938108] [ 30.938327] Freed by task 213: [ 30.938735] kasan_save_stack+0x22/0x50 [ 30.939240] kasan_set_track+0x25/0x30 [ 30.939735] kasan_save_free_info+0x2b/0x50 [ 30.940271] __kasan_slab_free+0x10a/0x190 [ 30.940818] kmem_cache_free+0x10d/0x4d0 [ 30.941334] rcu_core+0x8c8/0x2860 [ 30.941781] __do_softirq+0x1b7/0x7d4 [ 30.942266] [ 30.942483] Last potentially related work creation: [ 30.943098] kasan_save_stack+0x22/0x50 [ 30.943611] __kasan_record_aux_stack+0x8e/0xa0 [ 30.944194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.944848] remove_vma+0x139/0x170 [ 30.945305] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.945874] do_vmi_munmap+0x1f1/0x2b0 [ 30.946369] __vm_munmap+0x138/0x3a0 [ 30.946854] __x64_sys_munmap+0x59/0x80 [ 30.947368] do_syscall_64+0x3f/0x90 [ 30.947851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.948509] [ 30.948728] The buggy address belongs to the object at ffff8880167439f8 [ 30.948728] which belongs to the cache vm_area_struct of size 168 [ 30.950228] The buggy address is located 88 bytes inside of [ 30.950228] freed 168-byte region [ffff8880167439f8, ffff888016743aa0) [ 30.951680] [ 30.951896] The buggy address belongs to the physical page: [ 30.952575] page:000000006274e589 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16743 [ 30.953683] memcg:ffff88800bf1ab01 [ 30.954116] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.954779] page_type: 0xffffffff() [ 30.955240] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.956176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf1ab01 [ 30.957166] page dumped because: kasan: bad access detected [ 30.958037] [ 30.958329] Memory state around the buggy address: [ 30.959158] ffff888016743900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.960281] ffff888016743980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.961200] >ffff888016743a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.962106] ^ [ 30.962880] ffff888016743a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.963855] ffff888016743b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.964759] ================================================================== [ 30.965962] Disabling lock debugging due to kernel taint [ 32.606367] BUG: Bad rss-counter state mm:00000000a56de31d type:MM_FILEPAGES val:33 [ 32.607388] BUG: Bad rss-counter state mm:00000000a56de31d type:MM_ANONPAGES val:22 [ 33.063278] BUG: Bad rss-counter state mm:0000000076db0330 type:MM_FILEPAGES val:33 [ 33.064340] BUG: Bad rss-counter state mm:0000000076db0330 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23092' (ECDSA) to the list of known hosts. 2023/06/20 19:33:17 fuzzer started 2023/06/20 19:33:17 dialing manager at localhost:36067 2023/06/20 19:33:17 checking machine... 2023/06/20 19:33:17 checking revisions... [ 33.682720] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:33:17 testing simple program... [ 33.722683] cgroup: Unknown subsys name 'net' [ 33.760000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83c60bd1 RDX=ffff8880165e51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800c6576a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000012 R11=0000090f0000090f R12=0000000000000000 R13=0000000000000012 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c086b RFL=00000287 [--S--PC] 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 00007fef7ba35900 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=00007ffddf9d9000 CR3=000000000c856000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f2ce9a7c008 CR3=000000000dab2000 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=2037313a33333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000