syzkaller login: [ 30.692920] BUG: Bad rss-counter state mm:000000007b3552a4 type:MM_FILEPAGES val:33 [ 30.694378] BUG: Bad rss-counter state mm:000000007b3552a4 type:MM_ANONPAGES val:22 [ 30.856033] ================================================================== [ 30.857086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.858024] Read of size 8 at addr ffff88800e980228 by task sshd/220 [ 30.858899] [ 30.859119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.859991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860967] Call Trace: [ 30.861295] [ 30.861581] dump_stack_lvl+0x91/0xf0 [ 30.862075] print_report+0xcc/0x620 [ 30.862557] ? __virt_addr_valid+0x102/0x340 [ 30.863109] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864365] kasan_report+0xbe/0xf0 [ 30.864846] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865480] vma_interval_tree_remove+0xc75/0xec0 [ 30.866093] vma_prepare+0xc54/0x11a0 [ 30.866578] __split_vma+0x5af/0x950 [ 30.867058] ? __pfx___split_vma+0x10/0x10 [ 30.867592] ? find_held_lock+0x2c/0x110 [ 30.868144] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.868712] ? lock_is_held_type+0x9f/0x120 [ 30.869254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.869874] ? mtree_range_walk+0x632/0x900 [ 30.870441] ? mas_walk+0x5c7/0x7c0 [ 30.870919] do_vmi_munmap+0x1f1/0x2b0 [ 30.871417] mmap_region+0x1f9/0x2660 [ 30.871920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.872443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.873168] ? __pfx_lock_acquire+0x10/0x10 [ 30.873715] ? __pfx_mmap_region+0x10/0x10 [ 30.874258] ? security_mmap_addr+0x7d/0xa0 [ 30.874798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.875376] do_mmap+0x854/0xf00 [ 30.875820] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.876332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.876913] ksys_mmap_pgoff+0x3af/0x500 [ 30.877422] do_syscall_64+0x3f/0x90 [ 30.877909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878564] RIP: 0033:0x7ff197746d82 [ 30.879027] 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 [ 30.881215] RSP: 002b:00007ffc4388d7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.882147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff197746d82 [ 30.883021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff196b80000 [ 30.883890] RBP: 00007ff196b80000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884781] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baf9cf4ec0 [ 30.885642] R13: 00007ffc4388d7e0 R14: 00007ffc4388d810 R15: 00007ffc4388db70 [ 30.886531] [ 30.886829] [ 30.887045] Allocated by task 213: [ 30.887484] kasan_save_stack+0x22/0x50 [ 30.888016] kasan_set_track+0x25/0x30 [ 30.888530] __kasan_slab_alloc+0x59/0x70 [ 30.889069] kmem_cache_alloc+0x16b/0x370 [ 30.889606] vm_area_dup+0x20/0x160 [ 30.890071] __split_vma+0x170/0x950 [ 30.890559] split_vma+0xc6/0x110 [ 30.891014] mprotect_fixup+0x8d2/0xb30 [ 30.891521] do_mprotect_pkey+0x87e/0xd40 [ 30.892061] __x64_sys_mprotect+0x78/0xc0 [ 30.892591] do_syscall_64+0x3f/0x90 [ 30.893076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893733] [ 30.893955] Freed by task 213: [ 30.894356] kasan_save_stack+0x22/0x50 [ 30.894864] kasan_set_track+0x25/0x30 [ 30.895369] kasan_save_free_info+0x2b/0x50 [ 30.895930] __kasan_slab_free+0x10a/0x190 [ 30.896471] kmem_cache_free+0x10d/0x4d0 [ 30.896992] rcu_core+0x8c8/0x2860 [ 30.897445] __do_softirq+0x1b7/0x7d4 [ 30.897938] [ 30.898160] Last potentially related work creation: [ 30.898777] kasan_save_stack+0x22/0x50 [ 30.899298] __kasan_record_aux_stack+0x8e/0xa0 [ 30.899881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900553] remove_vma+0x139/0x170 [ 30.901014] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901575] do_vmi_munmap+0x1f1/0x2b0 [ 30.902071] __vm_munmap+0x138/0x3a0 [ 30.902548] __x64_sys_munmap+0x59/0x80 [ 30.903065] do_syscall_64+0x3f/0x90 [ 30.903546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904208] [ 30.904422] The buggy address belongs to the object at ffff88800e9801d0 [ 30.904422] which belongs to the cache vm_area_struct of size 168 [ 30.905921] The buggy address is located 88 bytes inside of [ 30.905921] freed 168-byte region [ffff88800e9801d0, ffff88800e980278) [ 30.907352] [ 30.907571] The buggy address belongs to the physical page: [ 30.908260] page:0000000030468343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe980 [ 30.909367] memcg:ffff88800e981001 [ 30.909796] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.910464] page_type: 0xffffffff() [ 30.910932] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.911863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e981001 [ 30.912797] page dumped because: kasan: bad access detected [ 30.913483] [ 30.913703] Memory state around the buggy address: [ 30.914316] ffff88800e980100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.915190] ffff88800e980180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.916073] >ffff88800e980200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.916943] ^ [ 30.917519] ffff88800e980280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.918393] ffff88800e980300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.919269] ================================================================== [ 30.920323] Disabling lock debugging due to kernel taint [ 33.010834] BUG: Bad rss-counter state mm:00000000bdf13519 type:MM_FILEPAGES val:33 [ 33.012030] BUG: Bad rss-counter state mm:00000000bdf13519 type:MM_ANONPAGES val:22 [ 33.465488] BUG: Bad rss-counter state mm:00000000257742bb type:MM_FILEPAGES val:33 [ 33.466680] BUG: Bad rss-counter state mm:00000000257742bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25103' (ECDSA) to the list of known hosts. 2023/06/20 17:45:15 fuzzer started 2023/06/20 17:45:15 dialing manager at localhost:36067 2023/06/20 17:45:15 checking machine... 2023/06/20 17:45:15 checking revisions... [ 34.190938] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:45:15 testing simple program... [ 34.240954] cgroup: Unknown subsys name 'net' [ 34.285114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:45:15 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000200 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff83869a2b RBP=ffff888015c3fb18 RSP=ffff888015c3f9f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888008fe8ff8 R13=00000000000000e5 R14=ffff888008fe8ea0 R15=ffff888013a5fa00 RIP=ffffffff845118ab 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 00007f3a6be9a900 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=00007ffdc9f87000 CR3=000000000da66000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc2e1257650 CR3=000000000c43c000 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=2035313a35343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000