syzkaller login: [ 34.506646] BUG: Bad rss-counter state mm:000000006f1d2b69 type:MM_FILEPAGES val:33 [ 34.508136] BUG: Bad rss-counter state mm:000000006f1d2b69 type:MM_ANONPAGES val:22 [ 34.676917] ================================================================== [ 34.678070] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.679393] Read of size 8 at addr ffff888015e50140 by task sshd/220 [ 34.680396] [ 34.680675] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.681786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.683033] Call Trace: [ 34.683467] [ 34.683809] dump_stack_lvl+0x91/0xf0 [ 34.684360] print_report+0xcc/0x620 [ 34.684918] ? __virt_addr_valid+0x102/0x340 [ 34.685531] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.686221] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.686904] kasan_report+0xbe/0xf0 [ 34.687449] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.688137] vma_interval_tree_remove+0xc75/0xec0 [ 34.688816] vma_prepare+0xc54/0x11a0 [ 34.689353] __split_vma+0x5af/0x950 [ 34.689876] ? __pfx___split_vma+0x10/0x10 [ 34.690465] ? find_held_lock+0x2c/0x110 [ 34.691049] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.691689] ? lock_is_held_type+0x9f/0x120 [ 34.692284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.692966] ? mtree_range_walk+0x632/0x900 [ 34.693581] ? mas_walk+0x5c7/0x7c0 [ 34.694113] do_vmi_munmap+0x1f1/0x2b0 [ 34.694667] mmap_region+0x1f9/0x2660 [ 34.695207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.695803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.696609] ? __pfx_lock_acquire+0x10/0x10 [ 34.697213] ? __pfx_mmap_region+0x10/0x10 [ 34.697830] ? security_mmap_addr+0x7d/0xa0 [ 34.698440] ? get_unmapped_area+0x1f5/0x3f0 [ 34.699071] do_mmap+0x854/0xf00 [ 34.699582] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.700144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.700786] ksys_mmap_pgoff+0x3af/0x500 [ 34.701362] do_syscall_64+0x3f/0x90 [ 34.701904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.702650] RIP: 0033:0x7f76f6a1ad82 [ 34.703171] 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 [ 34.705613] RSP: 002b:00007ffc07fe5918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.706643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76f6a1ad82 [ 34.707620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76f5e54000 [ 34.708585] RBP: 00007f76f5e54000 R08: 0000000000000009 R09: 0000000000001000 [ 34.709514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d057287ec0 [ 34.710447] R13: 00007ffc07fe5930 R14: 00007ffc07fe5960 R15: 00007ffc07fe5cc0 [ 34.711394] [ 34.711732] [ 34.711968] Allocated by task 213: [ 34.712438] kasan_save_stack+0x22/0x50 [ 34.713005] kasan_set_track+0x25/0x30 [ 34.713552] __kasan_slab_alloc+0x59/0x70 [ 34.714146] kmem_cache_alloc+0x16b/0x370 [ 34.714736] vm_area_dup+0x20/0x160 [ 34.715251] __split_vma+0x170/0x950 [ 34.715809] split_vma+0xc6/0x110 [ 34.716308] mprotect_fixup+0x8d2/0xb30 [ 34.716884] do_mprotect_pkey+0x87e/0xd40 [ 34.717482] __x64_sys_mprotect+0x78/0xc0 [ 34.718079] do_syscall_64+0x3f/0x90 [ 34.718623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.719443] [ 34.719693] Freed by task 213: [ 34.720147] kasan_save_stack+0x22/0x50 [ 34.720730] kasan_set_track+0x25/0x30 [ 34.721302] kasan_save_free_info+0x2b/0x50 [ 34.721919] __kasan_slab_free+0x10a/0x190 [ 34.722541] kmem_cache_free+0x10d/0x4d0 [ 34.723124] rcu_core+0x8c8/0x2860 [ 34.723640] __do_softirq+0x1b7/0x7d4 [ 34.724191] [ 34.724445] Last potentially related work creation: [ 34.725122] kasan_save_stack+0x22/0x50 [ 34.725713] __kasan_record_aux_stack+0x8e/0xa0 [ 34.726378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.727119] remove_vma+0x139/0x170 [ 34.727660] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.728299] do_vmi_munmap+0x1f1/0x2b0 [ 34.728859] __vm_munmap+0x138/0x3a0 [ 34.729389] __x64_sys_munmap+0x59/0x80 [ 34.729960] do_syscall_64+0x3f/0x90 [ 34.730516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.731240] [ 34.731489] The buggy address belongs to the object at ffff888015e500e8 [ 34.731489] which belongs to the cache vm_area_struct of size 168 [ 34.733129] The buggy address is located 88 bytes inside of [ 34.733129] freed 168-byte region [ffff888015e500e8, ffff888015e50190) [ 34.734687] [ 34.734925] The buggy address belongs to the physical page: [ 34.735668] page:00000000ff21b5fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e50 [ 34.736905] memcg:ffff88800f205c01 [ 34.737406] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.738147] page_type: 0xffffffff() [ 34.738651] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.739699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f205c01 [ 34.740710] page dumped because: kasan: bad access detected [ 34.741474] [ 34.741723] Memory state around the buggy address: [ 34.742393] ffff888015e50000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.743377] ffff888015e50080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.744378] >ffff888015e50100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.745350] ^ [ 34.746059] ffff888015e50180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.746955] ffff888015e50200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.747862] ================================================================== [ 34.748925] Disabling lock debugging due to kernel taint [ 37.141744] BUG: Bad rss-counter state mm:00000000f3b78f68 type:MM_FILEPAGES val:33 [ 37.142947] BUG: Bad rss-counter state mm:00000000f3b78f68 type:MM_ANONPAGES val:22 [ 37.520166] BUG: Bad rss-counter state mm:0000000060a3c8e5 type:MM_FILEPAGES val:33 [ 37.521176] BUG: Bad rss-counter state mm:0000000060a3c8e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36655' (ECDSA) to the list of known hosts. 2023/06/19 17:50:05 fuzzer started 2023/06/19 17:50:05 dialing manager at localhost:44161 2023/06/19 17:50:05 checking machine... 2023/06/19 17:50:05 checking revisions... [ 38.232715] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:50:05 testing simple program... [ 38.284815] cgroup: Unknown subsys name 'net' [ 38.329161] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:02 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00000000fea896dc RCX=ffffffff8219dd5f RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888017713d7e RSP=ffff88800edbf548 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=ffffffff849f2c00 R14=0000000000000002 R15=ffff88800edbf688 RIP=ffffffff814c01d0 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 00007f156a11a700 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=00007f1622c42618 CR3=000000000c4f2000 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=2035303a30353a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8b6c007c10 CR3=000000000c4f2000 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=30353a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383935 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000