syzkaller login: [ 32.257122] BUG: Bad rss-counter state mm:00000000555e9e9b type:MM_FILEPAGES val:33 [ 32.258335] BUG: Bad rss-counter state mm:00000000555e9e9b type:MM_ANONPAGES val:22 [ 32.304289] ================================================================== [ 32.305294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.306472] Read of size 8 at addr ffff88801017bc20 by task sshd/221 [ 32.307447] [ 32.307688] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.308638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.309748] Call Trace: [ 32.310105] [ 32.310435] dump_stack_lvl+0x91/0xf0 [ 32.310974] print_report+0xcc/0x620 [ 32.311511] ? __virt_addr_valid+0x102/0x340 [ 32.312124] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.312809] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.313623] kasan_report+0xbe/0xf0 [ 32.314229] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.314918] vma_interval_tree_remove+0xc75/0xec0 [ 32.315585] vma_prepare+0xc54/0x11a0 [ 32.316209] __split_vma+0x5af/0x950 [ 32.316796] ? __pfx___split_vma+0x10/0x10 [ 32.317449] ? find_held_lock+0x2c/0x110 [ 32.318104] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.318804] ? lock_is_held_type+0x9f/0x120 [ 32.319473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.320220] ? mtree_range_walk+0x632/0x900 [ 32.320897] ? mas_walk+0x5c7/0x7c0 [ 32.321481] do_vmi_munmap+0x1f1/0x2b0 [ 32.322095] mmap_region+0x1f9/0x2660 [ 32.322631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.323195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.323984] ? __pfx_lock_acquire+0x10/0x10 [ 32.324582] ? __pfx_mmap_region+0x10/0x10 [ 32.325167] ? security_mmap_addr+0x7d/0xa0 [ 32.325759] ? get_unmapped_area+0x1f5/0x3f0 [ 32.326360] do_mmap+0x854/0xf00 [ 32.326846] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.327398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.328010] ksys_mmap_pgoff+0x3af/0x500 [ 32.328564] do_syscall_64+0x3f/0x90 [ 32.329082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.329774] RIP: 0033:0x7fdef753ad82 [ 32.330269] 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 [ 32.332605] RSP: 002b:00007ffe9573b4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.333613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdef753ad82 [ 32.334519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdef6974000 [ 32.335427] RBP: 00007fdef6974000 R08: 0000000000000009 R09: 0000000000001000 [ 32.336338] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557642cf9ec0 [ 32.337251] R13: 00007ffe9573b500 R14: 00007ffe9573b530 R15: 00007ffe9573b890 [ 32.338205] [ 32.338524] [ 32.338764] Allocated by task 214: [ 32.339225] kasan_save_stack+0x22/0x50 [ 32.339771] kasan_set_track+0x25/0x30 [ 32.340315] __kasan_slab_alloc+0x59/0x70 [ 32.340889] kmem_cache_alloc+0x16b/0x370 [ 32.341446] vm_area_dup+0x20/0x160 [ 32.341958] __split_vma+0x170/0x950 [ 32.342455] split_vma+0xc6/0x110 [ 32.342920] mprotect_fixup+0x8d2/0xb30 [ 32.343466] do_mprotect_pkey+0x87e/0xd40 [ 32.344020] __x64_sys_mprotect+0x78/0xc0 [ 32.344577] do_syscall_64+0x3f/0x90 [ 32.345087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.345793] [ 32.346022] Freed by task 214: [ 32.346444] kasan_save_stack+0x22/0x50 [ 32.346989] kasan_set_track+0x25/0x30 [ 32.347520] kasan_save_free_info+0x2b/0x50 [ 32.348093] __kasan_slab_free+0x10a/0x190 [ 32.348677] kmem_cache_free+0x10d/0x4d0 [ 32.349223] rcu_core+0x8c8/0x2860 [ 32.349733] __do_softirq+0x1b7/0x7d4 [ 32.350257] [ 32.350488] Last potentially related work creation: [ 32.351111] kasan_save_stack+0x22/0x50 [ 32.351648] __kasan_record_aux_stack+0x8e/0xa0 [ 32.352266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.352968] remove_vma+0x139/0x170 [ 32.353468] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.354111] do_vmi_munmap+0x1f1/0x2b0 [ 32.354636] __vm_munmap+0x138/0x3a0 [ 32.355140] __x64_sys_munmap+0x59/0x80 [ 32.355671] do_syscall_64+0x3f/0x90 [ 32.356184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.356874] [ 32.357107] The buggy address belongs to the object at ffff88801017bbc8 [ 32.357107] which belongs to the cache vm_area_struct of size 168 [ 32.358731] The buggy address is located 88 bytes inside of [ 32.358731] freed 168-byte region [ffff88801017bbc8, ffff88801017bc70) [ 32.360280] [ 32.360519] The buggy address belongs to the physical page: [ 32.361256] page:0000000027835d51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1017b [ 32.362467] memcg:ffff888019f7c801 [ 32.362953] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.363674] page_type: 0xffffffff() [ 32.364176] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.365198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f7c801 [ 32.366235] page dumped because: kasan: bad access detected [ 32.366964] [ 32.367198] Memory state around the buggy address: [ 32.367853] ffff88801017bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.368807] ffff88801017bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.369763] >ffff88801017bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.370708] ^ [ 32.371296] ffff88801017bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.372257] ffff88801017bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.373208] ================================================================== [ 32.374636] Disabling lock debugging due to kernel taint [ 34.908085] BUG: Bad rss-counter state mm:00000000e50916fc type:MM_FILEPAGES val:33 [ 34.909572] BUG: Bad rss-counter state mm:00000000e50916fc type:MM_ANONPAGES val:22 [ 35.387311] BUG: Bad rss-counter state mm:0000000081dae928 type:MM_FILEPAGES val:33 [ 35.388318] BUG: Bad rss-counter state mm:0000000081dae928 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12747' (ECDSA) to the list of known hosts. 2023/06/19 13:04:59 fuzzer started 2023/06/19 13:04:59 dialing manager at localhost:44161 2023/06/19 13:04:59 checking machine... 2023/06/19 13:04:59 checking revisions... [ 36.078101] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:04:59 testing simple program... [ 36.118653] cgroup: Unknown subsys name 'net' [ 36.193428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:57 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=1ffff1100d9c1320 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce098d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180ef1a 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 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=00007fa51d2e7ec0 CR3=0000000019d3c000 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=2038353a34303a3331203931206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a323537343520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016d5855a78 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000053d4f RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eff85 R11=0000000000000001 R12=0000000000053d4f R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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 00007f7c493c0900 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=00007f7c499780b0 CR3=000000000de9a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000