syzkaller login: [ 31.039022] BUG: Bad rss-counter state mm:000000002f5aa9a6 type:MM_FILEPAGES val:33 [ 31.040472] BUG: Bad rss-counter state mm:000000002f5aa9a6 type:MM_ANONPAGES val:22 [ 31.202567] ================================================================== [ 31.203658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.204775] Read of size 8 at addr ffff888015b80140 by task sshd/220 [ 31.205848] [ 31.206068] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.206943] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.207956] Call Trace: [ 31.208279] [ 31.208568] dump_stack_lvl+0x91/0xf0 [ 31.209071] print_report+0xcc/0x620 [ 31.209581] ? __virt_addr_valid+0x102/0x340 [ 31.210141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211392] kasan_report+0xbe/0xf0 [ 31.211885] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212527] vma_interval_tree_remove+0xc75/0xec0 [ 31.213137] vma_prepare+0xc54/0x11a0 [ 31.213635] __split_vma+0x5af/0x950 [ 31.214113] ? __pfx___split_vma+0x10/0x10 [ 31.214646] ? find_held_lock+0x2c/0x110 [ 31.215175] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215742] ? lock_is_held_type+0x9f/0x120 [ 31.216283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.216897] ? mtree_range_walk+0x632/0x900 [ 31.217483] ? mas_walk+0x5c7/0x7c0 [ 31.217969] do_vmi_munmap+0x1f1/0x2b0 [ 31.218466] mmap_region+0x1f9/0x2660 [ 31.218965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220206] ? __pfx_lock_acquire+0x10/0x10 [ 31.220745] ? __pfx_mmap_region+0x10/0x10 [ 31.221290] ? security_mmap_addr+0x7d/0xa0 [ 31.221826] ? get_unmapped_area+0x1f5/0x3f0 [ 31.222379] do_mmap+0x854/0xf00 [ 31.222820] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.223887] ksys_mmap_pgoff+0x3af/0x500 [ 31.224399] do_syscall_64+0x3f/0x90 [ 31.224878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225546] RIP: 0033:0x7f56d9335d82 [ 31.226004] 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 [ 31.228126] RSP: 002b:00007ffc011dab88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56d9335d82 [ 31.229911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56d876f000 [ 31.230756] RBP: 00007f56d876f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.231605] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d13e2c9b20 [ 31.232450] R13: 00007ffc011daba0 R14: 00007ffc011dabd0 R15: 00007ffc011daf30 [ 31.233325] [ 31.233620] [ 31.233840] Allocated by task 213: [ 31.234268] kasan_save_stack+0x22/0x50 [ 31.234775] kasan_set_track+0x25/0x30 [ 31.235270] __kasan_slab_alloc+0x59/0x70 [ 31.235795] kmem_cache_alloc+0x16b/0x370 [ 31.236316] vm_area_dup+0x20/0x160 [ 31.236778] __split_vma+0x170/0x950 [ 31.237249] split_vma+0xc6/0x110 [ 31.237710] mprotect_fixup+0x8d2/0xb30 [ 31.238225] do_mprotect_pkey+0x87e/0xd40 [ 31.238744] __x64_sys_mprotect+0x78/0xc0 [ 31.239263] do_syscall_64+0x3f/0x90 [ 31.239740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240387] [ 31.240609] Freed by task 213: [ 31.241004] kasan_save_stack+0x22/0x50 [ 31.241516] kasan_set_track+0x25/0x30 [ 31.242009] kasan_save_free_info+0x2b/0x50 [ 31.242547] __kasan_slab_free+0x10a/0x190 [ 31.243088] kmem_cache_free+0x10d/0x4d0 [ 31.243595] rcu_core+0x8c8/0x2860 [ 31.244038] __do_softirq+0x1b7/0x7d4 [ 31.244521] [ 31.244738] Last potentially related work creation: [ 31.245337] kasan_save_stack+0x22/0x50 [ 31.245852] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247130] remove_vma+0x139/0x170 [ 31.247591] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248156] do_vmi_munmap+0x1f1/0x2b0 [ 31.248645] __vm_munmap+0x138/0x3a0 [ 31.249122] __x64_sys_munmap+0x59/0x80 [ 31.249633] do_syscall_64+0x3f/0x90 [ 31.250115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250771] [ 31.250990] The buggy address belongs to the object at ffff888015b800e8 [ 31.250990] which belongs to the cache vm_area_struct of size 168 [ 31.252470] The buggy address is located 88 bytes inside of [ 31.252470] freed 168-byte region [ffff888015b800e8, ffff888015b80190) [ 31.253918] [ 31.254146] The buggy address belongs to the physical page: [ 31.254830] page:00000000d071e7af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b80 [ 31.255914] memcg:ffff888015b86601 [ 31.256341] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.256986] page_type: 0xffffffff() [ 31.257458] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.258393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b86601 [ 31.259300] page dumped because: kasan: bad access detected [ 31.259959] [ 31.260178] Memory state around the buggy address: [ 31.260760] ffff888015b80000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.261640] ffff888015b80080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.262504] >ffff888015b80100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.263357] ^ [ 31.264000] ffff888015b80180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.264865] ffff888015b80200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.265734] ================================================================== [ 31.266658] Disabling lock debugging due to kernel taint [ 33.295990] BUG: Bad rss-counter state mm:0000000065e961b8 type:MM_FILEPAGES val:33 [ 33.296964] BUG: Bad rss-counter state mm:0000000065e961b8 type:MM_ANONPAGES val:22 [ 33.776452] BUG: Bad rss-counter state mm:00000000e1595b97 type:MM_FILEPAGES val:33 [ 33.777514] BUG: Bad rss-counter state mm:00000000e1595b97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26436' (ECDSA) to the list of known hosts. 2023/06/20 22:33:31 fuzzer started 2023/06/20 22:33:31 dialing manager at localhost:36067 2023/06/20 22:33:31 checking machine... 2023/06/20 22:33:31 checking revisions... [ 34.429387] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:33:31 testing simple program... [ 34.477092] cgroup: Unknown subsys name 'net' [ 34.524104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:33:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016de7568 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83636216 RDI=ffff888016de7574 RBP=0000000000000009 RSP=ffff888016de7480 R8 =0000000000000001 R9 =ffff888016de74e0 R10=0000000000038001 R11=000000000008a835 R12=ffff888016de7568 R13=0000000000000000 R14=ffff888009e21b40 R15=ffff888009c325f0 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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 00007f2340480700 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=00007f9f2f39701c CR3=000000000da40000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3333 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323836 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000255 RCX=ffffffff8113b798 RDX=ffff888018c81b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888018f7ff58 RSP=ffff888018f7fec8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007ffc3b4a98ec R14=0000000000000000 R15=ffff888009a88000 RIP=ffffffff814c0261 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 00007f9f2f3e3900 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=00007ffc3b4a98ec CR3=000000000e3f4000 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=000000000000000000000000000000ff XMM03=5825423fccd706035dc8cb58a3e8b9af XMM04=2f677a5c623ebfb9e378a141765fcf69 XMM05=000000000000000000000000000000ff XMM06=2f25423f623e06035d78a141765fb969 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000