syzkaller login: [ 30.186115] BUG: Bad rss-counter state mm:0000000034e10895 type:MM_FILEPAGES val:33 [ 30.187388] BUG: Bad rss-counter state mm:0000000034e10895 type:MM_ANONPAGES val:22 [ 30.339678] ================================================================== [ 30.340770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.341898] Read of size 8 at addr ffff888009ad1140 by task sshd/219 [ 30.342913] [ 30.343223] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.344244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.345421] Call Trace: [ 30.345754] [ 30.346105] dump_stack_lvl+0x91/0xf0 [ 30.346724] print_report+0xcc/0x620 [ 30.347365] ? __virt_addr_valid+0x102/0x340 [ 30.348067] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348838] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349620] kasan_report+0xbe/0xf0 [ 30.350225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351029] vma_interval_tree_remove+0xc75/0xec0 [ 30.351790] vma_prepare+0xc54/0x11a0 [ 30.352393] __split_vma+0x5af/0x950 [ 30.352986] ? __pfx___split_vma+0x10/0x10 [ 30.353648] ? find_held_lock+0x2c/0x110 [ 30.354301] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.355054] ? lock_is_held_type+0x9f/0x120 [ 30.355729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.356354] ? mtree_range_walk+0x632/0x900 [ 30.356906] ? mas_walk+0x5c7/0x7c0 [ 30.357391] do_vmi_munmap+0x1f1/0x2b0 [ 30.357881] mmap_region+0x1f9/0x2660 [ 30.358366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.358897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.359620] ? __pfx_lock_acquire+0x10/0x10 [ 30.360153] ? __pfx_mmap_region+0x10/0x10 [ 30.360682] ? security_mmap_addr+0x7d/0xa0 [ 30.361214] ? get_unmapped_area+0x1f5/0x3f0 [ 30.361764] do_mmap+0x854/0xf00 [ 30.362201] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.362697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.363294] ksys_mmap_pgoff+0x3af/0x500 [ 30.363797] do_syscall_64+0x3f/0x90 [ 30.364287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364930] RIP: 0033:0x7f594eec8d82 [ 30.365385] 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 [ 30.367529] RSP: 002b:00007ffc70822158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.368427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f594eec8d82 [ 30.369274] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f594e302000 [ 30.370118] RBP: 00007f594e302000 R08: 0000000000000009 R09: 0000000000001000 [ 30.370996] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561364c1dd90 [ 30.371845] R13: 00007ffc70822170 R14: 00007ffc708221a0 R15: 00007ffc70822500 [ 30.372707] [ 30.373004] [ 30.373219] Allocated by task 212: [ 30.373636] kasan_save_stack+0x22/0x50 [ 30.374139] kasan_set_track+0x25/0x30 [ 30.374625] __kasan_slab_alloc+0x59/0x70 [ 30.375185] kmem_cache_alloc+0x16b/0x370 [ 30.375703] vm_area_dup+0x20/0x160 [ 30.376164] __split_vma+0x170/0x950 [ 30.376625] split_vma+0xc6/0x110 [ 30.377066] mprotect_fixup+0x8d2/0xb30 [ 30.377570] do_mprotect_pkey+0x87e/0xd40 [ 30.378084] __x64_sys_mprotect+0x78/0xc0 [ 30.378603] do_syscall_64+0x3f/0x90 [ 30.379118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379766] [ 30.379984] Freed by task 212: [ 30.380377] kasan_save_stack+0x22/0x50 [ 30.380876] kasan_set_track+0x25/0x30 [ 30.381363] kasan_save_free_info+0x2b/0x50 [ 30.381887] __kasan_slab_free+0x10a/0x190 [ 30.382422] kmem_cache_free+0x10d/0x4d0 [ 30.382971] rcu_core+0x8c8/0x2860 [ 30.383426] __do_softirq+0x1b7/0x7d4 [ 30.383911] [ 30.384128] Last potentially related work creation: [ 30.384706] kasan_save_stack+0x22/0x50 [ 30.385205] __kasan_record_aux_stack+0x8e/0xa0 [ 30.385778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.386420] remove_vma+0x139/0x170 [ 30.386894] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.387455] do_vmi_munmap+0x1f1/0x2b0 [ 30.387937] __vm_munmap+0x138/0x3a0 [ 30.388406] __x64_sys_munmap+0x59/0x80 [ 30.388903] do_syscall_64+0x3f/0x90 [ 30.389374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.390018] [ 30.390230] The buggy address belongs to the object at ffff888009ad10e8 [ 30.390230] which belongs to the cache vm_area_struct of size 168 [ 30.391720] The buggy address is located 88 bytes inside of [ 30.391720] freed 168-byte region [ffff888009ad10e8, ffff888009ad1190) [ 30.393135] [ 30.393348] The buggy address belongs to the physical page: [ 30.394008] page:0000000077810842 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ad1 [ 30.395137] memcg:ffff88800f156801 [ 30.395556] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.396202] page_type: 0xffffffff() [ 30.396650] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.397556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f156801 [ 30.398464] page dumped because: kasan: bad access detected [ 30.399145] [ 30.399356] Memory state around the buggy address: [ 30.399931] ffff888009ad1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.400777] ffff888009ad1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.401626] >ffff888009ad1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.402468] ^ [ 30.403137] ffff888009ad1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.403993] ffff888009ad1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.404822] ================================================================== [ 30.405777] Disabling lock debugging due to kernel taint [ 32.340538] BUG: Bad rss-counter state mm:00000000a57c0a2a type:MM_FILEPAGES val:33 [ 32.341612] BUG: Bad rss-counter state mm:00000000a57c0a2a type:MM_ANONPAGES val:22 [ 32.815013] BUG: Bad rss-counter state mm:00000000b7b9e0f8 type:MM_FILEPAGES val:33 [ 32.816076] BUG: Bad rss-counter state mm:00000000b7b9e0f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20792' (ECDSA) to the list of known hosts. 2023/06/20 18:06:15 fuzzer started 2023/06/20 18:06:15 dialing manager at localhost:36067 2023/06/20 18:06:15 checking machine... 2023/06/20 18:06:15 checking revisions... [ 33.542471] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:06:15 testing simple program... [ 33.602788] cgroup: Unknown subsys name 'net' [ 33.659870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:06:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f7b6181c000 CR3=0000000013746000 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=66a8dc8e2774659db24aac22d9d4201a XMM02=ec2efd57dc4c00df000000000011adf8 XMM03=bb1e6768323b4773000000000011aec8 XMM04=2a68b14b06daad7e00000000000ae988 XMM05=0e0369dd22fb2f500000000000132388 XMM06=806171799158d9670000000000131428 XMM07=e042d86d42eb936e00000000001219e8 XMM08=bb1e6768323b4773000000000011aec8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fbfb49306c3 RCX=0000000000000100 RDX=ffff888019069b40 RSI=ffffffff813a0ac4 RDI=00007fbfb49306c3 RBP=ffffffffffffffff RSP=ffff88806cf09a00 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fbfb4930000 R11=00000000000b6a61 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888019069b40 R15=ffff88800f0deb80 RIP=ffffffff813a0ad2 RFL=00000282 [--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 00007fbfb444d900 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=00007ffde5d6b000 CR3=000000000e3fe000 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