syzkaller login: [ 34.115996] BUG: Bad rss-counter state mm:000000007df9482e type:MM_FILEPAGES val:33 [ 34.117455] BUG: Bad rss-counter state mm:000000007df9482e type:MM_ANONPAGES val:22 [ 34.284909] ================================================================== [ 34.285820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.286759] Read of size 8 at addr ffff88801a6b1058 by task sshd/219 [ 34.287526] [ 34.287742] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.288677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.289651] Call Trace: [ 34.289979] [ 34.290282] dump_stack_lvl+0x91/0xf0 [ 34.290764] print_report+0xcc/0x620 [ 34.291252] ? __virt_addr_valid+0x102/0x340 [ 34.291798] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.292419] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.293034] kasan_report+0xbe/0xf0 [ 34.293513] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.294129] vma_interval_tree_remove+0xc75/0xec0 [ 34.294732] vma_prepare+0xc54/0x11a0 [ 34.295205] __split_vma+0x5af/0x950 [ 34.295671] ? __pfx___split_vma+0x10/0x10 [ 34.296197] ? find_held_lock+0x2c/0x110 [ 34.296711] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.297293] ? lock_is_held_type+0x9f/0x120 [ 34.297823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.298431] ? mtree_range_walk+0x632/0x900 [ 34.298973] ? mas_walk+0x5c7/0x7c0 [ 34.299441] do_vmi_munmap+0x1f1/0x2b0 [ 34.299928] mmap_region+0x1f9/0x2660 [ 34.300411] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.300913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.301653] ? __pfx_lock_acquire+0x10/0x10 [ 34.302194] ? __pfx_mmap_region+0x10/0x10 [ 34.302725] ? security_mmap_addr+0x7d/0xa0 [ 34.303253] ? get_unmapped_area+0x1f5/0x3f0 [ 34.303807] do_mmap+0x854/0xf00 [ 34.304244] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.304742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.305306] ksys_mmap_pgoff+0x3af/0x500 [ 34.305811] do_syscall_64+0x3f/0x90 [ 34.306283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.306929] RIP: 0033:0x7fafd23c8d82 [ 34.307381] 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 [ 34.309503] RSP: 002b:00007ffc6712d7f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.310391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafd23c8d82 [ 34.311218] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafd1802000 [ 34.312055] RBP: 00007fafd1802000 R08: 0000000000000009 R09: 0000000000001000 [ 34.312884] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557fd77bfec0 [ 34.313736] R13: 00007ffc6712d810 R14: 00007ffc6712d840 R15: 00007ffc6712dba0 [ 34.314576] [ 34.314863] [ 34.315078] Allocated by task 212: [ 34.315501] kasan_save_stack+0x22/0x50 [ 34.316003] kasan_set_track+0x25/0x30 [ 34.316488] __kasan_slab_alloc+0x59/0x70 [ 34.317006] kmem_cache_alloc+0x16b/0x370 [ 34.317533] vm_area_dup+0x20/0x160 [ 34.317981] __split_vma+0x170/0x950 [ 34.318441] split_vma+0xc6/0x110 [ 34.318884] mprotect_fixup+0x8d2/0xb30 [ 34.319386] do_mprotect_pkey+0x87e/0xd40 [ 34.319897] __x64_sys_mprotect+0x78/0xc0 [ 34.320407] do_syscall_64+0x3f/0x90 [ 34.320875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.321526] [ 34.321742] Freed by task 212: [ 34.322130] kasan_save_stack+0x22/0x50 [ 34.322636] kasan_set_track+0x25/0x30 [ 34.323123] kasan_save_free_info+0x2b/0x50 [ 34.323645] __kasan_slab_free+0x10a/0x190 [ 34.324179] kmem_cache_free+0x10d/0x4d0 [ 34.324682] rcu_core+0x8c8/0x2860 [ 34.325123] __do_softirq+0x1b7/0x7d4 [ 34.325617] [ 34.325829] Last potentially related work creation: [ 34.326410] kasan_save_stack+0x22/0x50 [ 34.326908] __kasan_record_aux_stack+0x8e/0xa0 [ 34.327470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.328109] remove_vma+0x139/0x170 [ 34.328555] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.329102] do_vmi_munmap+0x1f1/0x2b0 [ 34.329590] __vm_munmap+0x138/0x3a0 [ 34.330050] __x64_sys_munmap+0x59/0x80 [ 34.330536] do_syscall_64+0x3f/0x90 [ 34.331008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.331638] [ 34.331850] The buggy address belongs to the object at ffff88801a6b1000 [ 34.331850] which belongs to the cache vm_area_struct of size 168 [ 34.333321] The buggy address is located 88 bytes inside of [ 34.333321] freed 168-byte region [ffff88801a6b1000, ffff88801a6b10a8) [ 34.334723] [ 34.334938] The buggy address belongs to the physical page: [ 34.335592] page:00000000113b6289 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a6b1 [ 34.336666] memcg:ffff888019770e01 [ 34.337087] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.337734] page_type: 0xffffffff() [ 34.338182] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.339086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019770e01 [ 34.339977] page dumped because: kasan: bad access detected [ 34.340634] [ 34.340848] Memory state around the buggy address: [ 34.341444] ffff88801a6b0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 34.342290] ffff88801a6b0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.343135] >ffff88801a6b1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.343980] ^ [ 34.344699] ffff88801a6b1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.345551] ffff88801a6b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.346387] ================================================================== [ 34.347700] Disabling lock debugging due to kernel taint [ 36.400955] BUG: Bad rss-counter state mm:00000000703ce3a3 type:MM_FILEPAGES val:33 [ 36.402279] BUG: Bad rss-counter state mm:00000000703ce3a3 type:MM_ANONPAGES val:22 [ 36.942721] BUG: Bad rss-counter state mm:00000000d38420d2 type:MM_FILEPAGES val:33 [ 36.944138] BUG: Bad rss-counter state mm:00000000d38420d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48464' (ECDSA) to the list of known hosts. 2023/06/20 07:56:02 fuzzer started 2023/06/20 07:56:03 dialing manager at localhost:44161 2023/06/20 07:56:03 checking machine... 2023/06/20 07:56:03 checking revisions... [ 37.641183] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:03 testing simple program... [ 37.696797] cgroup: Unknown subsys name 'net' [ 37.766894] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffe8ffffc147c8 RCX=0000000000000000 RDX=1ffffd1ffff828fb RSI=ffffffff81454a23 RDI=ffffe8ffffc147d8 RBP=ffff888018e6d000 RSP=ffff888018c17970 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000001b2af R13=ffff888015e71b40 R14=ffff888015e71c10 R15=0000000000000001 RIP=ffffffff81454a70 RFL=00000046 [---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 00007f71d6f8c700 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=00007fdfdffa5650 CR3=0000000018db0000 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=2032303a36353a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a36353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880102f73b0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83638916 RDI=ffff8880102f73bc RBP=000000000000000f RSP=ffff8880102f72c8 R8 =0000000000000001 R9 =ffff8880102f7328 R10=0000000000038001 R11=000000000008a842 R12=ffff8880102f73b0 R13=0000000000000000 R14=ffff8880102f8000 R15=0000000000092820 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f1bfc4ba900 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=00007f1bfb9da008 CR3=000000000d7cc000 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=ac5ec3545c75c4ac33415fe552ace7fb XMM02=000000000011cb10eff9b2d0a8fce9cb XMM03=000000000011cbe02c67c8bc2e329bc3 XMM04=fa9b8863ed49d3f500000000000ae988 XMM05=3eb692f27d4ae5c00000000000134d00 XMM06=4fda316b135da52b0000000000133af0 XMM07=fb795ef6d65770560000000000124060 XMM08=2c67c8bc2e329bc3000000000011cb80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000