syzkaller login: [ 30.544652] BUG: Bad rss-counter state mm:0000000037684237 type:MM_FILEPAGES val:33 [ 30.546135] BUG: Bad rss-counter state mm:0000000037684237 type:MM_ANONPAGES val:22 [ 30.687232] ================================================================== [ 30.688146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.689089] Read of size 8 at addr ffff8880147c9968 by task sshd/219 [ 30.689871] [ 30.690112] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.691107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.692095] Call Trace: [ 30.692423] [ 30.692736] dump_stack_lvl+0x91/0xf0 [ 30.693234] print_report+0xcc/0x620 [ 30.693724] ? __virt_addr_valid+0x102/0x340 [ 30.694269] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.695509] kasan_report+0xbe/0xf0 [ 30.695991] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.696615] vma_interval_tree_remove+0xc75/0xec0 [ 30.697210] vma_prepare+0xc54/0x11a0 [ 30.697696] __split_vma+0x5af/0x950 [ 30.698170] ? __pfx___split_vma+0x10/0x10 [ 30.698707] ? find_held_lock+0x2c/0x110 [ 30.699233] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.699805] ? lock_is_held_type+0x9f/0x120 [ 30.700355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.700962] ? mtree_range_walk+0x632/0x900 [ 30.701516] ? mas_walk+0x5c7/0x7c0 [ 30.701992] do_vmi_munmap+0x1f1/0x2b0 [ 30.702490] mmap_region+0x1f9/0x2660 [ 30.702975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.703488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.704221] ? __pfx_lock_acquire+0x10/0x10 [ 30.704767] ? __pfx_mmap_region+0x10/0x10 [ 30.705294] ? security_mmap_addr+0x7d/0xa0 [ 30.705827] ? get_unmapped_area+0x1f5/0x3f0 [ 30.706377] do_mmap+0x854/0xf00 [ 30.706817] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.707312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.707889] ksys_mmap_pgoff+0x3af/0x500 [ 30.708392] do_syscall_64+0x3f/0x90 [ 30.708878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709527] RIP: 0033:0x7fed33033d82 [ 30.709990] 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 [ 30.712131] RSP: 002b:00007fff2bf51928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.713039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed33033d82 [ 30.713896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed3246d000 [ 30.714757] RBP: 00007fed3246d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.715599] R10: 0000000000000812 R11: 0000000000000206 R12: 000055868c5fcec0 [ 30.716471] R13: 00007fff2bf51940 R14: 00007fff2bf51970 R15: 00007fff2bf51cd0 [ 30.717331] [ 30.717625] [ 30.717843] Allocated by task 212: [ 30.718266] kasan_save_stack+0x22/0x50 [ 30.718778] kasan_set_track+0x25/0x30 [ 30.719275] __kasan_slab_alloc+0x59/0x70 [ 30.719813] kmem_cache_alloc+0x16b/0x370 [ 30.720336] vm_area_dup+0x20/0x160 [ 30.720798] __split_vma+0x170/0x950 [ 30.721266] split_vma+0xc6/0x110 [ 30.721704] mprotect_fixup+0x8d2/0xb30 [ 30.722206] do_mprotect_pkey+0x87e/0xd40 [ 30.722725] __x64_sys_mprotect+0x78/0xc0 [ 30.723251] do_syscall_64+0x3f/0x90 [ 30.723737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724406] [ 30.724624] Freed by task 212: [ 30.725020] kasan_save_stack+0x22/0x50 [ 30.725526] kasan_set_track+0x25/0x30 [ 30.726019] kasan_save_free_info+0x2b/0x50 [ 30.726555] __kasan_slab_free+0x10a/0x190 [ 30.727092] kmem_cache_free+0x10d/0x4d0 [ 30.727598] rcu_core+0x8c8/0x2860 [ 30.728195] __do_softirq+0x1b7/0x7d4 [ 30.728694] [ 30.728919] Last potentially related work creation: [ 30.729509] kasan_save_stack+0x22/0x50 [ 30.730027] __kasan_record_aux_stack+0x8e/0xa0 [ 30.730617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.731335] remove_vma+0x139/0x170 [ 30.731805] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.732376] do_vmi_munmap+0x1f1/0x2b0 [ 30.732870] __vm_munmap+0x138/0x3a0 [ 30.733354] __x64_sys_munmap+0x59/0x80 [ 30.733872] do_syscall_64+0x3f/0x90 [ 30.734374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735040] [ 30.735264] The buggy address belongs to the object at ffff8880147c9910 [ 30.735264] which belongs to the cache vm_area_struct of size 168 [ 30.736765] The buggy address is located 88 bytes inside of [ 30.736765] freed 168-byte region [ffff8880147c9910, ffff8880147c99b8) [ 30.738182] [ 30.738409] The buggy address belongs to the physical page: [ 30.739078] page:00000000bb6e3c2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147c9 [ 30.740198] memcg:ffff8880097efd01 [ 30.740623] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.741276] page_type: 0xffffffff() [ 30.741738] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.742673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097efd01 [ 30.743573] page dumped because: kasan: bad access detected [ 30.744247] [ 30.744465] Memory state around the buggy address: [ 30.745041] ffff8880147c9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.745911] ffff8880147c9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.746775] >ffff8880147c9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.747636] ^ [ 30.748448] ffff8880147c9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.749315] ffff8880147c9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.750171] ================================================================== [ 30.751296] Disabling lock debugging due to kernel taint [ 33.377587] BUG: Bad rss-counter state mm:00000000a57f1a63 type:MM_FILEPAGES val:33 [ 33.379216] BUG: Bad rss-counter state mm:00000000a57f1a63 type:MM_ANONPAGES val:22 [ 33.865819] BUG: Bad rss-counter state mm:000000006ce5aad3 type:MM_FILEPAGES val:33 [ 33.866822] BUG: Bad rss-counter state mm:000000006ce5aad3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10078' (ECDSA) to the list of known hosts. 2023/06/20 18:27:14 fuzzer started 2023/06/20 18:27:15 dialing manager at localhost:36067 2023/06/20 18:27:15 checking machine... 2023/06/20 18:27:15 checking revisions... [ 34.617197] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:27:15 testing simple program... [ 34.663282] cgroup: Unknown subsys name 'net' [ 34.700926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c5e9000 RCX=0000000000000001 RDX=0000000000000400 RSI=ffff88800c5e9258 RDI=ffffffff87b775c0 RBP=0000000000000400 RSP=ffff8880090bf9a8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=0000000000000001 R13=ffffffff87b775c0 R14=ffff88800c5e9258 R15=ffff8880193f4050 RIP=ffffffff84489d83 RFL=00000082 [--S----] 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=0000563f66f77290 CR3=000000000d90a000 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=0a726f7475636578652d7a7973203637 XMM02=3b975ad62548812ec3df43bc99c5f2e0 XMM03=189ab24babef466eaf0e34191082b221 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=64707466730073254073250070746673 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8170f2ef RDX=ffff888009c3b680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888018ea7d90 RSP=ffff888018ea7bf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00005b2400 R13=ffff88801670d000 R14=ffff888018ea7db8 R15=0000000000000000 RIP=ffffffff814c027c 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 00007ff522fbf900 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=00007ff523b61968 CR3=000000000d90a000 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=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