syzkaller login: [ 33.747967] BUG: Bad rss-counter state mm:00000000b45769ed type:MM_FILEPAGES val:33 [ 33.749289] BUG: Bad rss-counter state mm:00000000b45769ed type:MM_ANONPAGES val:22 [ 33.793824] ================================================================== [ 33.794880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.795865] Read of size 8 at addr ffff88800e9b1c20 by task sshd/221 [ 33.796709] [ 33.796934] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.797846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.798870] Call Trace: [ 33.799198] [ 33.799490] dump_stack_lvl+0x91/0xf0 [ 33.799999] print_report+0xcc/0x620 [ 33.800506] ? __virt_addr_valid+0x102/0x340 [ 33.801092] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.801742] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.802385] kasan_report+0xbe/0xf0 [ 33.802876] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.803534] vma_interval_tree_remove+0xc75/0xec0 [ 33.804170] vma_prepare+0xc54/0x11a0 [ 33.804668] __split_vma+0x5af/0x950 [ 33.805172] ? __pfx___split_vma+0x10/0x10 [ 33.805717] ? find_held_lock+0x2c/0x110 [ 33.806265] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.806858] ? lock_is_held_type+0x9f/0x120 [ 33.807415] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.808044] ? mtree_range_walk+0x632/0x900 [ 33.808629] ? mas_walk+0x5c7/0x7c0 [ 33.809132] do_vmi_munmap+0x1f1/0x2b0 [ 33.809660] mmap_region+0x1f9/0x2660 [ 33.810170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.810701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.811441] ? __pfx_lock_acquire+0x10/0x10 [ 33.812006] ? __pfx_mmap_region+0x10/0x10 [ 33.812564] ? security_mmap_addr+0x7d/0xa0 [ 33.813126] ? get_unmapped_area+0x1f5/0x3f0 [ 33.813702] do_mmap+0x854/0xf00 [ 33.814162] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.814675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.815269] ksys_mmap_pgoff+0x3af/0x500 [ 33.815809] do_syscall_64+0x3f/0x90 [ 33.816325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.817002] RIP: 0033:0x7f951ea0fd82 [ 33.817471] 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 [ 33.819713] RSP: 002b:00007ffd1577f4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.820853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f951ea0fd82 [ 33.821758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f951de49000 [ 33.822648] RBP: 00007f951de49000 R08: 0000000000000009 R09: 0000000000001000 [ 33.823571] R10: 0000000000000812 R11: 0000000000000206 R12: 000055884c271980 [ 33.824469] R13: 00007ffd1577f510 R14: 00007ffd1577f540 R15: 00007ffd1577f8a0 [ 33.825364] [ 33.825675] [ 33.825899] Allocated by task 214: [ 33.826341] kasan_save_stack+0x22/0x50 [ 33.826859] kasan_set_track+0x25/0x30 [ 33.827369] __kasan_slab_alloc+0x59/0x70 [ 33.827916] kmem_cache_alloc+0x16b/0x370 [ 33.828463] vm_area_dup+0x20/0x160 [ 33.828942] __split_vma+0x170/0x950 [ 33.829423] split_vma+0xc6/0x110 [ 33.829884] mprotect_fixup+0x8d2/0xb30 [ 33.830425] do_mprotect_pkey+0x87e/0xd40 [ 33.830971] __x64_sys_mprotect+0x78/0xc0 [ 33.831511] do_syscall_64+0x3f/0x90 [ 33.832002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.832698] [ 33.832921] Freed by task 214: [ 33.833342] kasan_save_stack+0x22/0x50 [ 33.833865] kasan_set_track+0x25/0x30 [ 33.834381] kasan_save_free_info+0x2b/0x50 [ 33.834944] __kasan_slab_free+0x10a/0x190 [ 33.835506] kmem_cache_free+0x10d/0x4d0 [ 33.836038] rcu_core+0x8c8/0x2860 [ 33.836516] __do_softirq+0x1b7/0x7d4 [ 33.837007] [ 33.837235] Last potentially related work creation: [ 33.837834] kasan_save_stack+0x22/0x50 [ 33.838356] __kasan_record_aux_stack+0x8e/0xa0 [ 33.838944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.839613] remove_vma+0x139/0x170 [ 33.840082] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.840668] do_vmi_munmap+0x1f1/0x2b0 [ 33.841167] __vm_munmap+0x138/0x3a0 [ 33.841647] __x64_sys_munmap+0x59/0x80 [ 33.842155] do_syscall_64+0x3f/0x90 [ 33.842639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.843291] [ 33.843509] The buggy address belongs to the object at ffff88800e9b1bc8 [ 33.843509] which belongs to the cache vm_area_struct of size 168 [ 33.845047] The buggy address is located 88 bytes inside of [ 33.845047] freed 168-byte region [ffff88800e9b1bc8, ffff88800e9b1c70) [ 33.846501] [ 33.846724] The buggy address belongs to the physical page: [ 33.847409] page:00000000fbd77b16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9b1 [ 33.848533] memcg:ffff88800d91b301 [ 33.848967] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.849625] page_type: 0xffffffff() [ 33.850081] raw: 0100000000000200 ffff88800879fc80 ffffea00005df240 000000000000000a [ 33.851018] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d91b301 [ 33.851955] page dumped because: kasan: bad access detected [ 33.852654] [ 33.852882] Memory state around the buggy address: [ 33.853485] ffff88800e9b1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.854376] ffff88800e9b1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.855249] >ffff88800e9b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.856125] ^ [ 33.856686] ffff88800e9b1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.857567] ffff88800e9b1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.858442] ================================================================== [ 33.859594] Disabling lock debugging due to kernel taint [ 35.555760] BUG: Bad rss-counter state mm:000000006197ef8e type:MM_FILEPAGES val:33 [ 35.556867] BUG: Bad rss-counter state mm:000000006197ef8e type:MM_ANONPAGES val:22 [ 36.087001] BUG: Bad rss-counter state mm:00000000c263b128 type:MM_FILEPAGES val:33 [ 36.088284] BUG: Bad rss-counter state mm:00000000c263b128 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7972' (ECDSA) to the list of known hosts. 2023/06/20 02:50:34 fuzzer started 2023/06/20 02:50:34 dialing manager at localhost:44161 2023/06/20 02:50:34 checking machine... 2023/06/20 02:50:34 checking revisions... [ 36.668553] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:50:34 testing simple program... [ 36.704222] cgroup: Unknown subsys name 'net' [ 36.736050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880142dfdf0 RCX=ffffffff81859a8b RDX=ffff888015beb680 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff8880142dfd80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008802 R13=ffff8880142dfea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e4 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 00007f69b647a900 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=00007f69b58aff10 CR3=000000000cd94000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=99e04e2eaa35afd400000000000ae988 XMM05=68e197b4df5b77e10000000000136b48 XMM06=c291bd5c70af25b90000000000135938 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f093680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83866998 RDI=ffff88800f093a74 RBP=ffff88800f093680 RSP=ffff88800fde7a80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=656d616e74736f68 R12=ffff88800f093680 R13=ffff88800f55f700 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff8137454d 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 00007f91879b2900 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=00007fff657fe000 CR3=000000000c6b2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000