syzkaller login: [ 31.771443] BUG: Bad rss-counter state mm:0000000066285725 type:MM_FILEPAGES val:33 [ 31.772775] BUG: Bad rss-counter state mm:0000000066285725 type:MM_ANONPAGES val:22 [ 31.911381] ================================================================== [ 31.912281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.913224] Read of size 8 at addr ffff888019aee798 by task sshd/221 [ 31.913994] [ 31.914212] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.915172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.916156] Call Trace: [ 31.916476] [ 31.916776] dump_stack_lvl+0x91/0xf0 [ 31.917275] print_report+0xcc/0x620 [ 31.917756] ? __virt_addr_valid+0x102/0x340 [ 31.918305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.918921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919531] kasan_report+0xbe/0xf0 [ 31.920011] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920630] vma_interval_tree_remove+0xc75/0xec0 [ 31.921241] vma_prepare+0xc54/0x11a0 [ 31.921721] __split_vma+0x5af/0x950 [ 31.922191] ? __pfx___split_vma+0x10/0x10 [ 31.922720] ? find_held_lock+0x2c/0x110 [ 31.923242] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.923802] ? lock_is_held_type+0x9f/0x120 [ 31.924338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.924960] ? mtree_range_walk+0x632/0x900 [ 31.925513] ? mas_walk+0x5c7/0x7c0 [ 31.925988] do_vmi_munmap+0x1f1/0x2b0 [ 31.926482] mmap_region+0x1f9/0x2660 [ 31.926963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.928177] ? __pfx_lock_acquire+0x10/0x10 [ 31.928709] ? __pfx_mmap_region+0x10/0x10 [ 31.929240] ? security_mmap_addr+0x7d/0xa0 [ 31.929768] ? get_unmapped_area+0x1f5/0x3f0 [ 31.930317] do_mmap+0x854/0xf00 [ 31.930756] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.931248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.931808] ksys_mmap_pgoff+0x3af/0x500 [ 31.932319] do_syscall_64+0x3f/0x90 [ 31.932807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.933450] RIP: 0033:0x7faef1415d82 [ 31.933905] 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 [ 31.936029] RSP: 002b:00007ffcaa7a9098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.936940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faef1415d82 [ 31.937785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faef084f000 [ 31.938627] RBP: 00007faef084f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.939470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055802968bec0 [ 31.940311] R13: 00007ffcaa7a90b0 R14: 00007ffcaa7a90e0 R15: 00007ffcaa7a9440 [ 31.941165] [ 31.941456] [ 31.941669] Allocated by task 214: [ 31.942097] kasan_save_stack+0x22/0x50 [ 31.942602] kasan_set_track+0x25/0x30 [ 31.943092] __kasan_slab_alloc+0x59/0x70 [ 31.943608] kmem_cache_alloc+0x16b/0x370 [ 31.944118] vm_area_dup+0x20/0x160 [ 31.944567] __split_vma+0x170/0x950 [ 31.945050] split_vma+0xc6/0x110 [ 31.945490] mprotect_fixup+0x8d2/0xb30 [ 31.945989] do_mprotect_pkey+0x87e/0xd40 [ 31.946507] __x64_sys_mprotect+0x78/0xc0 [ 31.947026] do_syscall_64+0x3f/0x90 [ 31.947494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.948131] [ 31.948344] Freed by task 214: [ 31.948736] kasan_save_stack+0x22/0x50 [ 31.949247] kasan_set_track+0x25/0x30 [ 31.949739] kasan_save_free_info+0x2b/0x50 [ 31.950263] __kasan_slab_free+0x10a/0x190 [ 31.950792] kmem_cache_free+0x10d/0x4d0 [ 31.951294] rcu_core+0x8c8/0x2860 [ 31.951740] __do_softirq+0x1b7/0x7d4 [ 31.952214] [ 31.952431] Last potentially related work creation: [ 31.953025] kasan_save_stack+0x22/0x50 [ 31.953525] __kasan_record_aux_stack+0x8e/0xa0 [ 31.954094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.954731] remove_vma+0x139/0x170 [ 31.955182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.955736] do_vmi_munmap+0x1f1/0x2b0 [ 31.956215] __vm_munmap+0x138/0x3a0 [ 31.956680] __x64_sys_munmap+0x59/0x80 [ 31.957182] do_syscall_64+0x3f/0x90 [ 31.957654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.958290] [ 31.958503] The buggy address belongs to the object at ffff888019aee740 [ 31.958503] which belongs to the cache vm_area_struct of size 168 [ 31.959961] The buggy address is located 88 bytes inside of [ 31.959961] freed 168-byte region [ffff888019aee740, ffff888019aee7e8) [ 31.961376] [ 31.961589] The buggy address belongs to the physical page: [ 31.962295] page:0000000081c2a361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19aee [ 31.963501] memcg:ffff88800c9d1101 [ 31.963970] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.964675] page_type: 0xffffffff() [ 31.965191] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.966202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9d1101 [ 31.967196] page dumped because: kasan: bad access detected [ 31.967925] [ 31.968162] Memory state around the buggy address: [ 31.968816] ffff888019aee680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.969758] ffff888019aee700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.970698] >ffff888019aee780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.971632] ^ [ 31.972174] ffff888019aee800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.973118] ffff888019aee880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.974053] ================================================================== [ 31.975124] Disabling lock debugging due to kernel taint [ 34.045110] BUG: Bad rss-counter state mm:00000000283c2fe6 type:MM_FILEPAGES val:33 [ 34.046132] BUG: Bad rss-counter state mm:00000000283c2fe6 type:MM_ANONPAGES val:22 [ 34.525782] BUG: Bad rss-counter state mm:000000002896b116 type:MM_FILEPAGES val:33 [ 34.526565] BUG: Bad rss-counter state mm:000000002896b116 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45668' (ECDSA) to the list of known hosts. 2023/06/19 20:43:11 fuzzer started 2023/06/19 20:43:11 dialing manager at localhost:44161 2023/06/19 20:43:11 checking machine... 2023/06/19 20:43:11 checking revisions... [ 35.170254] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:43:11 testing simple program... [ 35.230386] cgroup: Unknown subsys name 'net' [ 35.260132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:09 Registers: info registers vcpu 0 RAX=ffff888010374000 RBX=ffff888010374000 RCX=0000000000000000 RDX=1ffff1100282dc04 RSI=0000000000000008 RDI=ffff8880103748f0 RBP=dffffc0000000000 RSP=ffff888014357a38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff88800dfd4000 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff81825fbb RFL=00000206 [-----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 00007f218657e900 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=00007f21859ff6e0 CR3=000000000c52e000 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=2031313a33343a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=000000000000000a RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84531d61 RBP=ffffffff8540a108 RSP=ffff888008e57e60 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff84531e4c RFL=00000202 [-------] 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=00007f8f2131c008 CR3=000000001be60000 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=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