syzkaller login: [ 38.825717] BUG: Bad rss-counter state mm:00000000242ccd3b type:MM_FILEPAGES val:33 [ 38.827127] BUG: Bad rss-counter state mm:00000000242ccd3b type:MM_ANONPAGES val:22 [ 38.867470] ================================================================== [ 38.868480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.869423] Read of size 8 at addr ffff88800d6345c8 by task sshd/225 [ 38.870197] [ 38.870419] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.871276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.872257] Call Trace: [ 38.872590] [ 38.872877] dump_stack_lvl+0x91/0xf0 [ 38.873366] print_report+0xcc/0x620 [ 38.873848] ? __virt_addr_valid+0x102/0x340 [ 38.874409] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875029] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875648] kasan_report+0xbe/0xf0 [ 38.876126] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876771] vma_interval_tree_remove+0xc75/0xec0 [ 38.877389] vma_prepare+0xc54/0x11a0 [ 38.877870] __split_vma+0x5af/0x950 [ 38.878345] ? __pfx___split_vma+0x10/0x10 [ 38.878876] ? find_held_lock+0x2c/0x110 [ 38.879404] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.879977] ? lock_is_held_type+0x9f/0x120 [ 38.880530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.881148] ? mtree_range_walk+0x632/0x900 [ 38.881702] ? mas_walk+0x5c7/0x7c0 [ 38.882185] do_vmi_munmap+0x1f1/0x2b0 [ 38.882685] mmap_region+0x1f9/0x2660 [ 38.883171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.883683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.884399] ? __pfx_lock_acquire+0x10/0x10 [ 38.884957] ? __pfx_mmap_region+0x10/0x10 [ 38.885504] ? security_mmap_addr+0x7d/0xa0 [ 38.886041] ? get_unmapped_area+0x1f5/0x3f0 [ 38.886602] do_mmap+0x854/0xf00 [ 38.887044] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.887543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.888112] ksys_mmap_pgoff+0x3af/0x500 [ 38.888629] do_syscall_64+0x3f/0x90 [ 38.889119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889771] RIP: 0033:0x7fc0d7ab4d82 [ 38.890234] 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 [ 38.892383] RSP: 002b:00007ffe95fd1d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.893306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0d7ab4d82 [ 38.894164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0d6eee000 [ 38.895177] RBP: 00007fc0d6eee000 R08: 0000000000000009 R09: 0000000000001000 [ 38.896024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d56ad5e980 [ 38.896897] R13: 00007ffe95fd1db0 R14: 00007ffe95fd1de0 R15: 00007ffe95fd2140 [ 38.897757] [ 38.898047] [ 38.898263] Allocated by task 218: [ 38.898689] kasan_save_stack+0x22/0x50 [ 38.899201] kasan_set_track+0x25/0x30 [ 38.899707] __kasan_slab_alloc+0x59/0x70 [ 38.900235] kmem_cache_alloc+0x16b/0x370 [ 38.900766] vm_area_dup+0x20/0x160 [ 38.901221] __split_vma+0x170/0x950 [ 38.901690] split_vma+0xc6/0x110 [ 38.902134] mprotect_fixup+0x8d2/0xb30 [ 38.902644] do_mprotect_pkey+0x87e/0xd40 [ 38.903168] __x64_sys_mprotect+0x78/0xc0 [ 38.903692] do_syscall_64+0x3f/0x90 [ 38.904170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904831] [ 38.905043] Freed by task 13: [ 38.905434] kasan_save_stack+0x22/0x50 [ 38.905936] kasan_set_track+0x25/0x30 [ 38.906441] kasan_save_free_info+0x2b/0x50 [ 38.906975] __kasan_slab_free+0x10a/0x190 [ 38.907514] kmem_cache_free+0x10d/0x4d0 [ 38.908024] rcu_core+0x8c8/0x2860 [ 38.908481] __do_softirq+0x1b7/0x7d4 [ 38.908964] [ 38.909185] Last potentially related work creation: [ 38.909775] kasan_save_stack+0x22/0x50 [ 38.910271] __kasan_record_aux_stack+0x8e/0xa0 [ 38.910846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.911487] remove_vma+0x139/0x170 [ 38.911942] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.912524] do_vmi_munmap+0x1f1/0x2b0 [ 38.913024] __vm_munmap+0x138/0x3a0 [ 38.913501] __x64_sys_munmap+0x59/0x80 [ 38.914001] do_syscall_64+0x3f/0x90 [ 38.914487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915134] [ 38.915348] The buggy address belongs to the object at ffff88800d634570 [ 38.915348] which belongs to the cache vm_area_struct of size 168 [ 38.916836] The buggy address is located 88 bytes inside of [ 38.916836] freed 168-byte region [ffff88800d634570, ffff88800d634618) [ 38.918253] [ 38.918466] The buggy address belongs to the physical page: [ 38.919135] page:000000001d30bff6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd634 [ 38.920238] memcg:ffff88800ebe7d01 [ 38.920667] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.921376] page_type: 0xffffffff() [ 38.921834] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.922750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebe7d01 [ 38.923659] page dumped because: kasan: bad access detected [ 38.924328] [ 38.924555] Memory state around the buggy address: [ 38.925155] ffff88800d634480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.926023] ffff88800d634500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.926891] >ffff88800d634580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.927756] ^ [ 38.928425] ffff88800d634600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.929292] ffff88800d634680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.930163] ================================================================== [ 38.931409] Disabling lock debugging due to kernel taint [ 40.898248] BUG: Bad rss-counter state mm:00000000fa84e35b type:MM_FILEPAGES val:33 [ 40.899287] BUG: Bad rss-counter state mm:00000000fa84e35b type:MM_ANONPAGES val:22 [ 41.407726] BUG: Bad rss-counter state mm:00000000812884d4 type:MM_FILEPAGES val:33 [ 41.408767] BUG: Bad rss-counter state mm:00000000812884d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54047' (ECDSA) to the list of known hosts. 2023/06/20 21:05:17 fuzzer started 2023/06/20 21:05:17 dialing manager at localhost:36067 2023/06/20 21:05:17 checking machine... 2023/06/20 21:05:17 checking revisions... [ 42.096007] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:05:17 testing simple program... [ 42.150877] cgroup: Unknown subsys name 'net' [ 42.190643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:05:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff852c87c8 RCX=0000000000000000 RDX=ffff88801a109b40 RSI=ffffffff81eede6f RDI=ffff88800ec565c0 RBP=ffff888016432000 RSP=ffff8880146b7928 R8 =0000000000000004 R9 =000000000000000a R10=000000000000fffa R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800ec565c0 R14=0000000000000001 R15=ffff8880146b7ae8 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 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=0000555e274be650 CR3=000000000eae4000 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=5f6b636f6c5f70696b735f6e6f697369 XMM02=00656d616e6f747865646e695f66695f XMM03=5f6e696f6a6b636f6c635f6461657268 XMM04=625f6b636f6c5f70696b735f6e6f6973 XMM05=6c645f006c5f6c6f747274735f5f0077 XMM06=00386674755f6c616e7265746e695f6d XMM07=00646e69776e755f646165726874705f XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860b0955 RBX=0000000000000001 RCX=ffffffff860b0950 RDX=0000000000000000 RSI=0000000000000005 RDI=ffffffff85da31f4 RBP=ffff888008e379a8 RSP=ffff888008e378e0 R8 =ffffffff860b0950 R9 =ffff888008e37990 R10=0000000000038001 R11=000000000000a20c R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37991 R15=ffff888008e37950 RIP=ffffffff81130a6e 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 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=00007fa6c8ae6920 CR3=0000000019ed4000 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=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000