syzkaller login: [ 30.591251] BUG: Bad rss-counter state mm:000000003fd3a9eb type:MM_FILEPAGES val:33 [ 30.592723] BUG: Bad rss-counter state mm:000000003fd3a9eb type:MM_ANONPAGES val:22 [ 30.752241] ================================================================== [ 30.753352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.754486] Read of size 8 at addr ffff88801637e880 by task sshd/219 [ 30.755571] [ 30.755839] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.756873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758157] Call Trace: [ 30.758561] [ 30.758907] dump_stack_lvl+0x91/0xf0 [ 30.759501] print_report+0xcc/0x620 [ 30.760087] ? __virt_addr_valid+0x102/0x340 [ 30.760750] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762301] kasan_report+0xbe/0xf0 [ 30.762916] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763724] vma_interval_tree_remove+0xc75/0xec0 [ 30.764522] vma_prepare+0xc54/0x11a0 [ 30.765179] __split_vma+0x5af/0x950 [ 30.765827] ? __pfx___split_vma+0x10/0x10 [ 30.766596] ? find_held_lock+0x2c/0x110 [ 30.767200] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.767852] ? lock_is_held_type+0x9f/0x120 [ 30.768482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.769186] ? mtree_range_walk+0x632/0x900 [ 30.769814] ? mas_walk+0x5c7/0x7c0 [ 30.770362] do_vmi_munmap+0x1f1/0x2b0 [ 30.770908] mmap_region+0x1f9/0x2660 [ 30.771454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.772036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.772845] ? __pfx_lock_acquire+0x10/0x10 [ 30.773440] ? __pfx_mmap_region+0x10/0x10 [ 30.774025] ? security_mmap_addr+0x7d/0xa0 [ 30.774642] ? get_unmapped_area+0x1f5/0x3f0 [ 30.775248] do_mmap+0x854/0xf00 [ 30.775713] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.776238] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.776837] ksys_mmap_pgoff+0x3af/0x500 [ 30.777389] do_syscall_64+0x3f/0x90 [ 30.777900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778613] RIP: 0033:0x7ff83ef02d82 [ 30.779116] 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 [ 30.781473] RSP: 002b:00007ffd923b6808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.782488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff83ef02d82 [ 30.783426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff83e33c000 [ 30.784358] RBP: 00007ff83e33c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.785295] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629ec4d2ec0 [ 30.786229] R13: 00007ffd923b6820 R14: 00007ffd923b6850 R15: 00007ffd923b6bb0 [ 30.787175] [ 30.787499] [ 30.787734] Allocated by task 212: [ 30.788208] kasan_save_stack+0x22/0x50 [ 30.788769] kasan_set_track+0x25/0x30 [ 30.789430] __kasan_slab_alloc+0x59/0x70 [ 30.790016] kmem_cache_alloc+0x16b/0x370 [ 30.790613] vm_area_dup+0x20/0x160 [ 30.791119] __split_vma+0x170/0x950 [ 30.791634] split_vma+0xc6/0x110 [ 30.792119] mprotect_fixup+0x8d2/0xb30 [ 30.792675] do_mprotect_pkey+0x87e/0xd40 [ 30.793254] __x64_sys_mprotect+0x78/0xc0 [ 30.793829] do_syscall_64+0x3f/0x90 [ 30.794362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795068] [ 30.795304] Freed by task 212: [ 30.795816] kasan_save_stack+0x22/0x50 [ 30.796370] kasan_set_track+0x25/0x30 [ 30.796916] kasan_save_free_info+0x2b/0x50 [ 30.797503] __kasan_slab_free+0x10a/0x190 [ 30.798096] kmem_cache_free+0x10d/0x4d0 [ 30.798677] rcu_core+0x8c8/0x2860 [ 30.799171] __do_softirq+0x1b7/0x7d4 [ 30.799704] [ 30.799940] Last potentially related work creation: [ 30.800590] kasan_save_stack+0x22/0x50 [ 30.801141] __kasan_record_aux_stack+0x8e/0xa0 [ 30.801780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.802501] remove_vma+0x139/0x170 [ 30.802998] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.803611] do_vmi_munmap+0x1f1/0x2b0 [ 30.804152] __vm_munmap+0x138/0x3a0 [ 30.804670] __x64_sys_munmap+0x59/0x80 [ 30.805222] do_syscall_64+0x3f/0x90 [ 30.805748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.806466] [ 30.806703] The buggy address belongs to the object at ffff88801637e828 [ 30.806703] which belongs to the cache vm_area_struct of size 168 [ 30.808327] The buggy address is located 88 bytes inside of [ 30.808327] freed 168-byte region [ffff88801637e828, ffff88801637e8d0) [ 30.809886] [ 30.810124] The buggy address belongs to the physical page: [ 30.810870] page:00000000a683a4c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1637e [ 30.812075] memcg:ffff88801637f001 [ 30.812548] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.813262] page_type: 0xffffffff() [ 30.813762] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.814790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801637f001 [ 30.815799] page dumped because: kasan: bad access detected [ 30.816530] [ 30.816771] Memory state around the buggy address: [ 30.817415] ffff88801637e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.818375] ffff88801637e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.819316] >ffff88801637e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.820256] ^ [ 30.820712] ffff88801637e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.821655] ffff88801637e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.822609] ================================================================== [ 30.823743] Disabling lock debugging due to kernel taint [ 33.094851] BUG: Bad rss-counter state mm:000000003e8c8ecb type:MM_FILEPAGES val:33 [ 33.096487] BUG: Bad rss-counter state mm:000000003e8c8ecb type:MM_ANONPAGES val:22 [ 33.513564] BUG: Bad rss-counter state mm:00000000a5d36a68 type:MM_FILEPAGES val:33 [ 33.514602] BUG: Bad rss-counter state mm:00000000a5d36a68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35030' (ECDSA) to the list of known hosts. 2023/06/21 06:15:32 fuzzer started 2023/06/21 06:15:32 dialing manager at localhost:36067 2023/06/21 06:15:32 checking machine... 2023/06/21 06:15:32 checking revisions... [ 34.253403] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:15:32 testing simple program... [ 34.297405] cgroup: Unknown subsys name 'net' [ 34.361062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:15:32 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=00007f6f808a9630 CR3=000000000d750000 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=2032333a35313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a35313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff852cab20 RCX=0000000000000000 RDX=ffff888015cab680 RSI=ffffffff81eeef39 RDI=ffff88801691cbb8 RBP=dffffc0000000000 RSP=ffff88800eab7d50 R8 =ffff88800eab7d10 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008f7a028 R13=ffff88801691cb80 R14=ffff88801691cda8 R15=0000000000000000 RIP=ffffffff814c0880 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 00007f8a25b86900 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=00007ffd2ba6f000 CR3=000000000c82e000 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=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