syzkaller login: [ 31.168720] BUG: Bad rss-counter state mm:000000001da319ed type:MM_FILEPAGES val:33 [ 31.169506] BUG: Bad rss-counter state mm:000000001da319ed type:MM_ANONPAGES val:22 [ 31.289606] ================================================================== [ 31.290800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.291757] Read of size 8 at addr ffff88800fbc76b0 by task sshd/222 [ 31.292623] [ 31.292841] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.293704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.294692] Call Trace: [ 31.295018] [ 31.295288] dump_stack_lvl+0x91/0xf0 [ 31.295763] print_report+0xcc/0x620 [ 31.296224] ? __virt_addr_valid+0x102/0x340 [ 31.296776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297805] kasan_report+0xbe/0xf0 [ 31.298211] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298741] vma_interval_tree_remove+0xc75/0xec0 [ 31.299282] vma_prepare+0xc54/0x11a0 [ 31.299640] __split_vma+0x5af/0x950 [ 31.299905] ? __pfx___split_vma+0x10/0x10 [ 31.300206] ? find_held_lock+0x2c/0x110 [ 31.300534] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.300853] ? lock_is_held_type+0x9f/0x120 [ 31.301160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.301501] ? mtree_range_walk+0x632/0x900 [ 31.301810] ? mas_walk+0x5c7/0x7c0 [ 31.302075] do_vmi_munmap+0x1f1/0x2b0 [ 31.302349] mmap_region+0x1f9/0x2660 [ 31.302666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.302965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.303371] ? __pfx_lock_acquire+0x10/0x10 [ 31.303695] ? __pfx_mmap_region+0x10/0x10 [ 31.303993] ? security_mmap_addr+0x7d/0xa0 [ 31.304291] ? get_unmapped_area+0x1f5/0x3f0 [ 31.304638] do_mmap+0x854/0xf00 [ 31.304884] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.305165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.305484] ksys_mmap_pgoff+0x3af/0x500 [ 31.305770] do_syscall_64+0x3f/0x90 [ 31.306037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306406] RIP: 0033:0x7fe8f09d0d82 [ 31.306672] 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 [ 31.307902] RSP: 002b:00007ffc5bf94de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.308415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8f09d0d82 [ 31.308906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8efe0a000 [ 31.309391] RBP: 00007fe8efe0a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.309870] R10: 0000000000000812 R11: 0000000000000206 R12: 000056135cbe3f70 [ 31.310353] R13: 00007ffc5bf94e00 R14: 00007ffc5bf94e30 R15: 00007ffc5bf95190 [ 31.310845] [ 31.311009] [ 31.311131] Allocated by task 213: [ 31.311373] kasan_save_stack+0x22/0x50 [ 31.311666] kasan_set_track+0x25/0x30 [ 31.311939] __kasan_slab_alloc+0x59/0x70 [ 31.312231] kmem_cache_alloc+0x16b/0x370 [ 31.312524] vm_area_dup+0x20/0x160 [ 31.312777] __split_vma+0x170/0x950 [ 31.313041] split_vma+0xc6/0x110 [ 31.313285] mprotect_fixup+0x8d2/0xb30 [ 31.313576] do_mprotect_pkey+0x87e/0xd40 [ 31.313867] __x64_sys_mprotect+0x78/0xc0 [ 31.314159] do_syscall_64+0x3f/0x90 [ 31.314428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314793] [ 31.314912] Freed by task 203: [ 31.315131] kasan_save_stack+0x22/0x50 [ 31.315413] kasan_set_track+0x25/0x30 [ 31.315697] kasan_save_free_info+0x2b/0x50 [ 31.315996] __kasan_slab_free+0x10a/0x190 [ 31.316296] kmem_cache_free+0x10d/0x4d0 [ 31.316583] rcu_core+0x8c8/0x2860 [ 31.316831] __do_softirq+0x1b7/0x7d4 [ 31.317099] [ 31.317221] Last potentially related work creation: [ 31.317550] kasan_save_stack+0x22/0x50 [ 31.317836] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.318532] remove_vma+0x139/0x170 [ 31.318794] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319112] do_vmi_munmap+0x1f1/0x2b0 [ 31.319388] __vm_munmap+0x138/0x3a0 [ 31.319655] __x64_sys_munmap+0x59/0x80 [ 31.319930] do_syscall_64+0x3f/0x90 [ 31.320197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320565] [ 31.320687] The buggy address belongs to the object at ffff88800fbc7658 [ 31.320687] which belongs to the cache vm_area_struct of size 168 [ 31.321525] The buggy address is located 88 bytes inside of [ 31.321525] freed 168-byte region [ffff88800fbc7658, ffff88800fbc7700) [ 31.322324] [ 31.322446] The buggy address belongs to the physical page: [ 31.322842] page:00000000884d0be9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbc7 [ 31.323466] memcg:ffff888019ee6e01 [ 31.323706] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324074] page_type: 0xffffffff() [ 31.324330] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.324855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ee6e01 [ 31.325372] page dumped because: kasan: bad access detected [ 31.325750] [ 31.325869] Memory state around the buggy address: [ 31.326195] ffff88800fbc7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.326682] ffff88800fbc7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.327174] >ffff88800fbc7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.327663] ^ [ 31.327993] ffff88800fbc7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.328489] ffff88800fbc7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.328967] ================================================================== [ 31.329537] Disabling lock debugging due to kernel taint [ 32.756827] BUG: Bad rss-counter state mm:0000000090b8958f type:MM_FILEPAGES val:33 [ 32.757576] BUG: Bad rss-counter state mm:0000000090b8958f type:MM_ANONPAGES val:22 [ 33.069199] BUG: Bad rss-counter state mm:00000000a17c7bee type:MM_FILEPAGES val:33 [ 33.069924] BUG: Bad rss-counter state mm:00000000a17c7bee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64293' (ECDSA) to the list of known hosts. 2023/06/21 08:23:36 fuzzer started 2023/06/21 08:23:36 dialing manager at localhost:36067 2023/06/21 08:23:36 checking machine... 2023/06/21 08:23:36 checking revisions... [ 33.667543] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:23:36 testing simple program... [ 33.716461] cgroup: Unknown subsys name 'net' [ 33.759022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001b14f82 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff818f6d6f RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800d8a7bd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88800d8a7c30 R13=0000000000000000 R14=ffff88800d8a7cf8 R15=ffff88801684a080 RIP=ffffffff814c0871 RFL=00000282 [--S----] 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 00007fd85918a900 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=00007fd85973f650 CR3=000000000cb7e000 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=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 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=ffff888008c04400 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=00007ffc35e32f58 CR3=0000000016674000 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=2036333a33323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000