syzkaller login: [ 30.476547] BUG: Bad rss-counter state mm:00000000f2ec2d63 type:MM_FILEPAGES val:33 [ 30.478661] BUG: Bad rss-counter state mm:00000000f2ec2d63 type:MM_ANONPAGES val:22 [ 30.634779] ================================================================== [ 30.635903] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.637154] Read of size 8 at addr ffff88801a3473f8 by task sshd/220 [ 30.638109] [ 30.638370] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.639469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.640669] Call Trace: [ 30.641062] [ 30.641400] dump_stack_lvl+0x91/0xf0 [ 30.642004] print_report+0xcc/0x620 [ 30.642586] ? __virt_addr_valid+0x102/0x340 [ 30.643265] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644778] kasan_report+0xbe/0xf0 [ 30.645342] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646089] vma_interval_tree_remove+0xc75/0xec0 [ 30.646811] vma_prepare+0xc54/0x11a0 [ 30.647403] __split_vma+0x5af/0x950 [ 30.647970] ? __pfx___split_vma+0x10/0x10 [ 30.648621] ? find_held_lock+0x2c/0x110 [ 30.649241] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.649918] ? lock_is_held_type+0x9f/0x120 [ 30.650561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.651319] ? mtree_range_walk+0x632/0x900 [ 30.651990] ? mas_walk+0x5c7/0x7c0 [ 30.652560] do_vmi_munmap+0x1f1/0x2b0 [ 30.653158] mmap_region+0x1f9/0x2660 [ 30.653750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.654356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.655252] ? __pfx_lock_acquire+0x10/0x10 [ 30.655913] ? __pfx_mmap_region+0x10/0x10 [ 30.656559] ? security_mmap_addr+0x7d/0xa0 [ 30.657209] ? get_unmapped_area+0x1f5/0x3f0 [ 30.657878] do_mmap+0x854/0xf00 [ 30.658402] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.659001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.659701] ksys_mmap_pgoff+0x3af/0x500 [ 30.660320] do_syscall_64+0x3f/0x90 [ 30.660886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.661652] RIP: 0033:0x7fc6e2e70d82 [ 30.662086] 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 [ 30.664091] RSP: 002b:00007ffe4d189838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.664947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6e2e70d82 [ 30.665743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6e22aa000 [ 30.666542] RBP: 00007fc6e22aa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.667345] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578ba7cf980 [ 30.668139] R13: 00007ffe4d189850 R14: 00007ffe4d189880 R15: 00007ffe4d189be0 [ 30.668954] [ 30.669229] [ 30.669434] Allocated by task 213: [ 30.669842] kasan_save_stack+0x22/0x50 [ 30.670319] kasan_set_track+0x25/0x30 [ 30.670785] __kasan_slab_alloc+0x59/0x70 [ 30.671304] kmem_cache_alloc+0x16b/0x370 [ 30.671792] vm_area_dup+0x20/0x160 [ 30.672244] __split_vma+0x170/0x950 [ 30.672713] split_vma+0xc6/0x110 [ 30.673140] mprotect_fixup+0x8d2/0xb30 [ 30.673635] do_mprotect_pkey+0x87e/0xd40 [ 30.674150] __x64_sys_mprotect+0x78/0xc0 [ 30.674667] do_syscall_64+0x3f/0x90 [ 30.675149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.675792] [ 30.676008] Freed by task 13: [ 30.676387] kasan_save_stack+0x22/0x50 [ 30.676891] kasan_set_track+0x25/0x30 [ 30.677377] kasan_save_free_info+0x2b/0x50 [ 30.677986] __kasan_slab_free+0x10a/0x190 [ 30.678522] kmem_cache_free+0x10d/0x4d0 [ 30.679020] rcu_core+0x8c8/0x2860 [ 30.679482] __do_softirq+0x1b7/0x7d4 [ 30.679966] [ 30.680179] Last potentially related work creation: [ 30.680766] kasan_save_stack+0x22/0x50 [ 30.681275] __kasan_record_aux_stack+0x8e/0xa0 [ 30.681846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.682497] remove_vma+0x139/0x170 [ 30.682950] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.683520] do_vmi_munmap+0x1f1/0x2b0 [ 30.684015] __vm_munmap+0x138/0x3a0 [ 30.684490] __x64_sys_munmap+0x59/0x80 [ 30.684984] do_syscall_64+0x3f/0x90 [ 30.685459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.686101] [ 30.686314] The buggy address belongs to the object at ffff88801a3473a0 [ 30.686314] which belongs to the cache vm_area_struct of size 168 [ 30.687789] The buggy address is located 88 bytes inside of [ 30.687789] freed 168-byte region [ffff88801a3473a0, ffff88801a347448) [ 30.689171] [ 30.689383] The buggy address belongs to the physical page: [ 30.690043] page:00000000dea678bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a347 [ 30.691176] memcg:ffff888016927801 [ 30.691624] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.692286] page_type: 0xffffffff() [ 30.692727] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.693645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016927801 [ 30.694547] page dumped because: kasan: bad access detected [ 30.695215] [ 30.695434] Memory state around the buggy address: [ 30.696017] ffff88801a347280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.696871] ffff88801a347300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.697736] >ffff88801a347380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.698584] ^ [ 30.699450] ffff88801a347400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.700304] ffff88801a347480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.701141] ================================================================== [ 30.702079] Disabling lock debugging due to kernel taint [ 32.778661] BUG: Bad rss-counter state mm:0000000035f161a2 type:MM_FILEPAGES val:33 [ 32.779776] BUG: Bad rss-counter state mm:0000000035f161a2 type:MM_ANONPAGES val:22 [ 33.342686] BUG: Bad rss-counter state mm:000000000e1efa57 type:MM_FILEPAGES val:33 [ 33.343676] BUG: Bad rss-counter state mm:000000000e1efa57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60685' (ECDSA) to the list of known hosts. 2023/06/21 01:14:57 fuzzer started 2023/06/21 01:14:57 dialing manager at localhost:36067 2023/06/21 01:14:57 checking machine... 2023/06/21 01:14:57 checking revisions... [ 33.976299] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:14:57 testing simple program... [ 34.022604] cgroup: Unknown subsys name 'net' [ 34.063335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:57 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=00007f51e64f40b0 CR3=0000000015fc0000 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=34313a3130203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180b006 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11000d65e5d RSI=ffff888006b2f4e0 RDI=ffffffff8180b006 RBP=ffff888006b2f2e8 RSP=ffff888006b2f280 R8 =0000000000000001 R9 =ffff888006b2f2d0 R10=0000000000038001 R11=0000000000021eef R12=ffff888006b2f358 R13=0000000000000000 R14=ffff888017e3d1c0 R15=ffff88801c038720 RIP=ffffffff811303b9 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 00007f51e5f3c900 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=00007f51e64f3618 CR3=000000000ca9c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000