syzkaller login: [ 30.182091] BUG: Bad rss-counter state mm:00000000c2d44864 type:MM_FILEPAGES val:33 [ 30.183325] BUG: Bad rss-counter state mm:00000000c2d44864 type:MM_ANONPAGES val:22 [ 30.347726] ================================================================== [ 30.348826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.349980] Read of size 8 at addr ffff888016a7edf0 by task sshd/220 [ 30.350989] [ 30.351209] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.352075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.353101] Call Trace: [ 30.353427] [ 30.353725] dump_stack_lvl+0x91/0xf0 [ 30.354229] print_report+0xcc/0x620 [ 30.354722] ? __virt_addr_valid+0x102/0x340 [ 30.355301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355943] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356563] kasan_report+0xbe/0xf0 [ 30.357050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.357699] vma_interval_tree_remove+0xc75/0xec0 [ 30.358317] vma_prepare+0xc54/0x11a0 [ 30.358801] __split_vma+0x5af/0x950 [ 30.359275] ? __pfx___split_vma+0x10/0x10 [ 30.359810] ? find_held_lock+0x2c/0x110 [ 30.360332] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.360904] ? lock_is_held_type+0x9f/0x120 [ 30.361447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.362085] ? mtree_range_walk+0x632/0x900 [ 30.362643] ? mas_walk+0x5c7/0x7c0 [ 30.363129] do_vmi_munmap+0x1f1/0x2b0 [ 30.363636] mmap_region+0x1f9/0x2660 [ 30.364123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.364643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.365360] ? __pfx_lock_acquire+0x10/0x10 [ 30.365910] ? __pfx_mmap_region+0x10/0x10 [ 30.366450] ? security_mmap_addr+0x7d/0xa0 [ 30.366991] ? get_unmapped_area+0x1f5/0x3f0 [ 30.367548] do_mmap+0x854/0xf00 [ 30.368023] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.368533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.369104] ksys_mmap_pgoff+0x3af/0x500 [ 30.369625] do_syscall_64+0x3f/0x90 [ 30.370122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.370788] RIP: 0033:0x7f73bb4c2d82 [ 30.371256] 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 [ 30.373429] RSP: 002b:00007ffdef3e2968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.374390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73bb4c2d82 [ 30.375280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73ba8fc000 [ 30.376143] RBP: 00007f73ba8fc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.377000] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1607d4d90 [ 30.377875] R13: 00007ffdef3e2980 R14: 00007ffdef3e29b0 R15: 00007ffdef3e2d10 [ 30.378729] [ 30.379024] [ 30.379242] Allocated by task 213: [ 30.379671] kasan_save_stack+0x22/0x50 [ 30.380174] kasan_set_track+0x25/0x30 [ 30.380672] __kasan_slab_alloc+0x59/0x70 [ 30.381203] kmem_cache_alloc+0x16b/0x370 [ 30.381740] vm_area_dup+0x20/0x160 [ 30.382201] __split_vma+0x170/0x950 [ 30.382668] split_vma+0xc6/0x110 [ 30.383114] mprotect_fixup+0x8d2/0xb30 [ 30.383634] do_mprotect_pkey+0x87e/0xd40 [ 30.384157] __x64_sys_mprotect+0x78/0xc0 [ 30.384692] do_syscall_64+0x3f/0x90 [ 30.385168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385837] [ 30.386055] Freed by task 203: [ 30.386449] kasan_save_stack+0x22/0x50 [ 30.386957] kasan_set_track+0x25/0x30 [ 30.387452] kasan_save_free_info+0x2b/0x50 [ 30.387982] __kasan_slab_free+0x10a/0x190 [ 30.388514] kmem_cache_free+0x10d/0x4d0 [ 30.389022] rcu_core+0x8c8/0x2860 [ 30.389466] __do_softirq+0x1b7/0x7d4 [ 30.389955] [ 30.390169] Last potentially related work creation: [ 30.390768] kasan_save_stack+0x22/0x50 [ 30.391274] __kasan_record_aux_stack+0x8e/0xa0 [ 30.391970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.392613] remove_vma+0x139/0x170 [ 30.393067] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.393647] do_vmi_munmap+0x1f1/0x2b0 [ 30.394154] __vm_munmap+0x138/0x3a0 [ 30.394622] __x64_sys_munmap+0x59/0x80 [ 30.395125] do_syscall_64+0x3f/0x90 [ 30.395617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396272] [ 30.396486] Second to last potentially related work creation: [ 30.397168] kasan_save_stack+0x22/0x50 [ 30.397679] __kasan_record_aux_stack+0x8e/0xa0 [ 30.398256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.398908] remove_vma+0x139/0x170 [ 30.399365] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.399921] do_vmi_munmap+0x1f1/0x2b0 [ 30.400415] __vm_munmap+0x138/0x3a0 [ 30.400894] __x64_sys_munmap+0x59/0x80 [ 30.401392] do_syscall_64+0x3f/0x90 [ 30.401892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402548] [ 30.402763] The buggy address belongs to the object at ffff888016a7ed98 [ 30.402763] which belongs to the cache vm_area_struct of size 168 [ 30.404241] The buggy address is located 88 bytes inside of [ 30.404241] freed 168-byte region [ffff888016a7ed98, ffff888016a7ee40) [ 30.405660] [ 30.405879] The buggy address belongs to the physical page: [ 30.406536] page:000000004dd77b44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a7e [ 30.407637] memcg:ffff8880147e8c01 [ 30.408070] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.408723] page_type: 0xffffffff() [ 30.409176] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.410120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147e8c01 [ 30.411049] page dumped because: kasan: bad access detected [ 30.411718] [ 30.411936] Memory state around the buggy address: [ 30.412523] ffff888016a7ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.413381] ffff888016a7ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.414285] >ffff888016a7ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.415141] ^ [ 30.415958] ffff888016a7ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.416826] ffff888016a7ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.417697] ================================================================== [ 30.418785] Disabling lock debugging due to kernel taint [ 32.661617] BUG: Bad rss-counter state mm:000000007478d6c4 type:MM_FILEPAGES val:33 [ 32.662651] BUG: Bad rss-counter state mm:000000007478d6c4 type:MM_ANONPAGES val:22 [ 33.113976] BUG: Bad rss-counter state mm:000000007ae24939 type:MM_FILEPAGES val:33 [ 33.115321] BUG: Bad rss-counter state mm:000000007ae24939 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7284' (ECDSA) to the list of known hosts. 2023/06/21 04:43:26 fuzzer started 2023/06/21 04:43:26 dialing manager at localhost:36067 2023/06/21 04:43:26 checking machine... 2023/06/21 04:43:26 checking revisions... [ 33.838165] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:43:26 testing simple program... [ 33.881148] cgroup: Unknown subsys name 'net' [ 33.942254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:43:26 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=00007fbea6b63210 CR3=000000001469e000 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=2036323a33343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff844a4e3e RDX=ffff8880145f1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e39980 RSP=ffff88801cdafc90 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=00007fa224d8efff RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa2241ef900 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=00007fa224d43044 CR3=00000000166e4000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000