syzkaller login: [ 36.750019] BUG: Bad rss-counter state mm:000000002a1db783 type:MM_FILEPAGES val:33 [ 36.751286] BUG: Bad rss-counter state mm:000000002a1db783 type:MM_ANONPAGES val:22 [ 36.851216] ================================================================== [ 36.852342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.853443] Read of size 8 at addr ffff888014648df0 by task sshd/220 [ 36.854366] [ 36.854782] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.855826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.856830] Call Trace: [ 36.857026] [ 36.857184] dump_stack_lvl+0x91/0xf0 [ 36.857453] print_report+0xcc/0x620 [ 36.857726] ? __virt_addr_valid+0x102/0x340 [ 36.858025] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.858369] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.858703] kasan_report+0xbe/0xf0 [ 36.858959] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.859296] vma_interval_tree_remove+0xc75/0xec0 [ 36.859625] vma_prepare+0xc54/0x11a0 [ 36.859894] __split_vma+0x5af/0x950 [ 36.860155] ? __pfx___split_vma+0x10/0x10 [ 36.860448] ? find_held_lock+0x2c/0x110 [ 36.860743] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.861065] ? lock_is_held_type+0x9f/0x120 [ 36.861380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.861738] ? mtree_range_walk+0x632/0x900 [ 36.862061] ? mas_walk+0x5c7/0x7c0 [ 36.862332] do_vmi_munmap+0x1f1/0x2b0 [ 36.862613] mmap_region+0x1f9/0x2660 [ 36.862890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.863190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.863606] ? __pfx_lock_acquire+0x10/0x10 [ 36.863925] ? __pfx_mmap_region+0x10/0x10 [ 36.864233] ? security_mmap_addr+0x7d/0xa0 [ 36.864543] ? get_unmapped_area+0x1f5/0x3f0 [ 36.864860] do_mmap+0x854/0xf00 [ 36.865116] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.865401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.865725] ksys_mmap_pgoff+0x3af/0x500 [ 36.866013] do_syscall_64+0x3f/0x90 [ 36.866291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.866678] RIP: 0033:0x7f9976a7fd82 [ 36.866949] 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 [ 36.868190] RSP: 002b:00007ffd2314c5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.868724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9976a7fd82 [ 36.869222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9975eb9000 [ 36.869715] RBP: 00007f9975eb9000 R08: 0000000000000009 R09: 0000000000001000 [ 36.870218] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcba44aec0 [ 36.870705] R13: 00007ffd2314c5e0 R14: 00007ffd2314c610 R15: 00007ffd2314c970 [ 36.871211] [ 36.871384] [ 36.871509] Allocated by task 213: [ 36.871756] kasan_save_stack+0x22/0x50 [ 36.872052] kasan_set_track+0x25/0x30 [ 36.872341] __kasan_slab_alloc+0x59/0x70 [ 36.872651] kmem_cache_alloc+0x16b/0x370 [ 36.872950] vm_area_dup+0x20/0x160 [ 36.873219] __split_vma+0x170/0x950 [ 36.873493] split_vma+0xc6/0x110 [ 36.873752] mprotect_fixup+0x8d2/0xb30 [ 36.874046] do_mprotect_pkey+0x87e/0xd40 [ 36.874353] __x64_sys_mprotect+0x78/0xc0 [ 36.874662] do_syscall_64+0x3f/0x90 [ 36.874934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.875310] [ 36.875435] Freed by task 203: [ 36.875665] kasan_save_stack+0x22/0x50 [ 36.875966] kasan_set_track+0x25/0x30 [ 36.876257] kasan_save_free_info+0x2b/0x50 [ 36.876571] __kasan_slab_free+0x10a/0x190 [ 36.876884] kmem_cache_free+0x10d/0x4d0 [ 36.877185] rcu_core+0x8c8/0x2860 [ 36.877447] __do_softirq+0x1b7/0x7d4 [ 36.877720] [ 36.877843] Last potentially related work creation: [ 36.878196] kasan_save_stack+0x22/0x50 [ 36.878489] __kasan_record_aux_stack+0x8e/0xa0 [ 36.878830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.879204] remove_vma+0x139/0x170 [ 36.879473] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.879789] do_vmi_munmap+0x1f1/0x2b0 [ 36.880081] __vm_munmap+0x138/0x3a0 [ 36.880351] __x64_sys_munmap+0x59/0x80 [ 36.880635] do_syscall_64+0x3f/0x90 [ 36.880916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.881292] [ 36.881421] The buggy address belongs to the object at ffff888014648d98 [ 36.881421] which belongs to the cache vm_area_struct of size 168 [ 36.882276] The buggy address is located 88 bytes inside of [ 36.882276] freed 168-byte region [ffff888014648d98, ffff888014648e40) [ 36.883092] [ 36.883220] The buggy address belongs to the physical page: [ 36.883607] page:0000000026fa8ca2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14648 [ 36.884242] memcg:ffff8880167b4101 [ 36.884493] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.884870] page_type: 0xffffffff() [ 36.885128] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.885664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167b4101 [ 36.886199] page dumped because: kasan: bad access detected [ 36.886577] [ 36.886699] Memory state around the buggy address: [ 36.887040] ffff888014648c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.887543] ffff888014648d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.888067] >ffff888014648d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.888571] ^ [ 36.889043] ffff888014648e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.889558] ffff888014648e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.890056] ================================================================== [ 36.890634] Disabling lock debugging due to kernel taint [ 38.797195] BUG: Bad rss-counter state mm:00000000ed34e6bd type:MM_FILEPAGES val:33 [ 38.797988] BUG: Bad rss-counter state mm:00000000ed34e6bd type:MM_ANONPAGES val:22 [ 39.253945] BUG: Bad rss-counter state mm:000000007fd94bba type:MM_FILEPAGES val:33 [ 39.254960] BUG: Bad rss-counter state mm:000000007fd94bba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52938' (ECDSA) to the list of known hosts. 2023/06/20 02:04:48 fuzzer started 2023/06/20 02:04:48 dialing manager at localhost:44161 2023/06/20 02:04:48 checking machine... 2023/06/20 02:04:48 checking revisions... [ 39.982434] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:04:49 testing simple program... [ 40.023965] cgroup: Unknown subsys name 'net' [ 40.062718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016084658 RCX=ffffffff8196d1b8 RDX=ffffed1002c108d8 RSI=0000000000000004 RDI=ffff8880160846b8 RBP=0000000000000ab9 RSP=ffff8880164c78a8 R8 =0000000000000001 R9 =ffffed1002c108d7 R10=ffff8880160846bb R11=0000000000000000 R12=0000000000000000 R13=0000000000000ab9 R14=ffff888019a03438 R15=ffff8880164c79d8 RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007f483a232700 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=00007f60a34a9300 CR3=000000000e65e000 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=2038343a34303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a34303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015adb788 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11002b5b6f1 RSI=ffff88801cd59198 RDI=ffff888015adbd88 RBP=ffff88801cd59198 RSP=ffff888015b97cf8 R8 =0000000000000001 R9 =ffffed1002b72f97 R10=0000000000000003 R11=00000000000b6cb2 R12=ffff888015adbd78 R13=fffffbfff0f70df0 R14=ffff888015add068 R15=ffffffff87b86f80 RIP=ffffffff844cc5ce RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2c8f699900 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=00007f2c8f75544c CR3=000000000dc00000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000