syzkaller login: [ 30.187526] BUG: Bad rss-counter state mm:000000003ed56cec type:MM_FILEPAGES val:33 [ 30.188564] BUG: Bad rss-counter state mm:000000003ed56cec type:MM_ANONPAGES val:22 [ 30.377082] ================================================================== [ 30.378067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.379042] Read of size 8 at addr ffff8880095d5880 by task sshd/220 [ 30.379830] [ 30.380229] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.381111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.382185] Call Trace: [ 30.382566] [ 30.382856] dump_stack_lvl+0x91/0xf0 [ 30.383366] print_report+0xcc/0x620 [ 30.383865] ? __virt_addr_valid+0x102/0x340 [ 30.384432] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385061] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385750] kasan_report+0xbe/0xf0 [ 30.386236] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.386877] vma_interval_tree_remove+0xc75/0xec0 [ 30.387501] vma_prepare+0xc54/0x11a0 [ 30.387980] __split_vma+0x5af/0x950 [ 30.388472] ? __pfx___split_vma+0x10/0x10 [ 30.389011] ? find_held_lock+0x2c/0x110 [ 30.389572] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.390152] ? lock_is_held_type+0x9f/0x120 [ 30.390723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.391344] ? mtree_range_walk+0x632/0x900 [ 30.391901] ? mas_walk+0x5c7/0x7c0 [ 30.392396] do_vmi_munmap+0x1f1/0x2b0 [ 30.392894] mmap_region+0x1f9/0x2660 [ 30.393404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.393944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.394704] ? __pfx_lock_acquire+0x10/0x10 [ 30.395254] ? __pfx_mmap_region+0x10/0x10 [ 30.395806] ? security_mmap_addr+0x7d/0xa0 [ 30.396367] ? get_unmapped_area+0x1f5/0x3f0 [ 30.396926] do_mmap+0x854/0xf00 [ 30.397387] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.397922] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.398515] ksys_mmap_pgoff+0x3af/0x500 [ 30.399031] do_syscall_64+0x3f/0x90 [ 30.399530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400190] RIP: 0033:0x7f39cf91cd82 [ 30.400661] 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 [ 30.402884] RSP: 002b:00007ffd4c135d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.403822] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39cf91cd82 [ 30.404693] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39ced56000 [ 30.405582] RBP: 00007f39ced56000 R08: 0000000000000009 R09: 0000000000001000 [ 30.406468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca3109cec0 [ 30.407341] R13: 00007ffd4c135d80 R14: 00007ffd4c135db0 R15: 00007ffd4c136110 [ 30.408221] [ 30.408534] [ 30.408750] Allocated by task 213: [ 30.409189] kasan_save_stack+0x22/0x50 [ 30.409762] kasan_set_track+0x25/0x30 [ 30.410265] __kasan_slab_alloc+0x59/0x70 [ 30.410810] kmem_cache_alloc+0x16b/0x370 [ 30.411348] vm_area_dup+0x20/0x160 [ 30.411816] __split_vma+0x170/0x950 [ 30.412295] split_vma+0xc6/0x110 [ 30.412751] mprotect_fixup+0x8d2/0xb30 [ 30.413252] do_mprotect_pkey+0x87e/0xd40 [ 30.413815] __x64_sys_mprotect+0x78/0xc0 [ 30.414359] do_syscall_64+0x3f/0x90 [ 30.414846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.415514] [ 30.415729] Freed by task 19: [ 30.416113] kasan_save_stack+0x22/0x50 [ 30.416646] kasan_set_track+0x25/0x30 [ 30.417149] kasan_save_free_info+0x2b/0x50 [ 30.417751] __kasan_slab_free+0x10a/0x190 [ 30.418290] kmem_cache_free+0x10d/0x4d0 [ 30.418825] rcu_core+0x8c8/0x2860 [ 30.419270] __do_softirq+0x1b7/0x7d4 [ 30.419780] [ 30.419995] Last potentially related work creation: [ 30.420606] kasan_save_stack+0x22/0x50 [ 30.421119] __kasan_record_aux_stack+0x8e/0xa0 [ 30.421741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.422482] remove_vma+0x139/0x170 [ 30.422941] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.423515] do_vmi_munmap+0x1f1/0x2b0 [ 30.424003] __vm_munmap+0x138/0x3a0 [ 30.424497] __x64_sys_munmap+0x59/0x80 [ 30.425001] do_syscall_64+0x3f/0x90 [ 30.425512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.426201] [ 30.426441] The buggy address belongs to the object at ffff8880095d5828 [ 30.426441] which belongs to the cache vm_area_struct of size 168 [ 30.427953] The buggy address is located 88 bytes inside of [ 30.427953] freed 168-byte region [ffff8880095d5828, ffff8880095d58d0) [ 30.429400] [ 30.429629] The buggy address belongs to the physical page: [ 30.430292] page:0000000063d56edb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95d5 [ 30.431427] memcg:ffff8880097d5201 [ 30.431862] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.432532] page_type: 0xffffffff() [ 30.433001] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.434158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d5201 [ 30.435087] page dumped because: kasan: bad access detected [ 30.435775] [ 30.435999] Memory state around the buggy address: [ 30.436634] ffff8880095d5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.437596] ffff8880095d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.438528] >ffff8880095d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.439440] ^ [ 30.439873] ffff8880095d5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440793] ffff8880095d5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.441737] ================================================================== [ 30.442811] Disabling lock debugging due to kernel taint [ 32.948479] BUG: Bad rss-counter state mm:000000004bde2587 type:MM_FILEPAGES val:33 [ 32.949650] BUG: Bad rss-counter state mm:000000004bde2587 type:MM_ANONPAGES val:22 [ 33.445790] BUG: Bad rss-counter state mm:00000000c117d11e type:MM_FILEPAGES val:33 [ 33.446906] BUG: Bad rss-counter state mm:00000000c117d11e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16931' (ECDSA) to the list of known hosts. 2023/06/21 01:37:57 fuzzer started 2023/06/21 01:37:57 dialing manager at localhost:36067 2023/06/21 01:37:57 checking machine... 2023/06/21 01:37:57 checking revisions... [ 34.096896] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:37:57 testing simple program... [ 34.143649] cgroup: Unknown subsys name 'net' [ 34.193097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=1ffff1100d9c135e RSI=ffffffff866212df RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff8113062c 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=0000560bb6702f08 CR3=00000000095fa000 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=2037353a37333a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a37333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f01fd30 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f01fc01 RSI=ffff88800f01fce8 RDI=ffff88800f01fce8 RBP=ffff88800f01f980 RSP=ffff88800f01f8b0 R8 =ffffffff86138740 R9 =ffff88800f01f968 R10=0000000000038001 R11=0000000000020c5e R12=ffff88800f01f988 R13=ffff88800f01f970 R14=ffff88800f01fce8 R15=ffff88800f01f928 RIP=ffffffff8112fbf3 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 00007f41f6b25900 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=00007f41f70dc618 CR3=000000000e86c000 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