syzkaller login: [ 34.588542] BUG: Bad rss-counter state mm:000000002029b3ff type:MM_FILEPAGES val:33 [ 34.589786] BUG: Bad rss-counter state mm:000000002029b3ff type:MM_ANONPAGES val:22 [ 34.758930] ================================================================== [ 34.759871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.760833] Read of size 8 at addr ffff88800d9fd228 by task sshd/221 [ 34.761608] [ 34.761892] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.762829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.763811] Call Trace: [ 34.764143] [ 34.764438] dump_stack_lvl+0x91/0xf0 [ 34.764960] print_report+0xcc/0x620 [ 34.765460] ? __virt_addr_valid+0x102/0x340 [ 34.766031] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.766675] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.767308] kasan_report+0xbe/0xf0 [ 34.767793] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.768439] vma_interval_tree_remove+0xc75/0xec0 [ 34.769068] vma_prepare+0xc54/0x11a0 [ 34.769549] __split_vma+0x5af/0x950 [ 34.770024] ? __pfx___split_vma+0x10/0x10 [ 34.770553] ? find_held_lock+0x2c/0x110 [ 34.771074] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.771645] ? lock_is_held_type+0x9f/0x120 [ 34.772185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.772800] ? mtree_range_walk+0x632/0x900 [ 34.773356] ? mas_walk+0x5c7/0x7c0 [ 34.773831] do_vmi_munmap+0x1f1/0x2b0 [ 34.774326] mmap_region+0x1f9/0x2660 [ 34.774805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.775315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.776022] ? __pfx_lock_acquire+0x10/0x10 [ 34.776577] ? __pfx_mmap_region+0x10/0x10 [ 34.777113] ? security_mmap_addr+0x7d/0xa0 [ 34.777660] ? get_unmapped_area+0x1f5/0x3f0 [ 34.778211] do_mmap+0x854/0xf00 [ 34.778657] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.779167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.779726] ksys_mmap_pgoff+0x3af/0x500 [ 34.780255] do_syscall_64+0x3f/0x90 [ 34.780749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.781392] RIP: 0033:0x7f6e5629bd82 [ 34.781852] 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 [ 34.783992] RSP: 002b:00007ffea89695e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.784947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e5629bd82 [ 34.785893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e556d5000 [ 34.786825] RBP: 00007f6e556d5000 R08: 0000000000000009 R09: 0000000000001000 [ 34.787772] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7366fdec0 [ 34.788721] R13: 00007ffea8969600 R14: 00007ffea8969630 R15: 00007ffea8969990 [ 34.789696] [ 34.790005] [ 34.790238] Allocated by task 214: [ 34.790697] kasan_save_stack+0x22/0x50 [ 34.791244] kasan_set_track+0x25/0x30 [ 34.791793] __kasan_slab_alloc+0x59/0x70 [ 34.792370] kmem_cache_alloc+0x16b/0x370 [ 34.792964] vm_area_dup+0x20/0x160 [ 34.793454] __split_vma+0x170/0x950 [ 34.793959] split_vma+0xc6/0x110 [ 34.794427] mprotect_fixup+0x8d2/0xb30 [ 34.794949] do_mprotect_pkey+0x87e/0xd40 [ 34.795501] __x64_sys_mprotect+0x78/0xc0 [ 34.796042] do_syscall_64+0x3f/0x90 [ 34.796559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.797228] [ 34.797458] Freed by task 214: [ 34.797868] kasan_save_stack+0x22/0x50 [ 34.798396] kasan_set_track+0x25/0x30 [ 34.798916] kasan_save_free_info+0x2b/0x50 [ 34.799479] __kasan_slab_free+0x10a/0x190 [ 34.800034] kmem_cache_free+0x10d/0x4d0 [ 34.800581] rcu_core+0x8c8/0x2860 [ 34.801054] __do_softirq+0x1b7/0x7d4 [ 34.801555] [ 34.801777] Last potentially related work creation: [ 34.802396] kasan_save_stack+0x22/0x50 [ 34.803013] __kasan_record_aux_stack+0x8e/0xa0 [ 34.803623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.804311] remove_vma+0x139/0x170 [ 34.804804] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.805388] do_vmi_munmap+0x1f1/0x2b0 [ 34.805904] __vm_munmap+0x138/0x3a0 [ 34.806399] __x64_sys_munmap+0x59/0x80 [ 34.806919] do_syscall_64+0x3f/0x90 [ 34.807413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.808104] [ 34.808328] The buggy address belongs to the object at ffff88800d9fd1d0 [ 34.808328] which belongs to the cache vm_area_struct of size 168 [ 34.809907] The buggy address is located 88 bytes inside of [ 34.809907] freed 168-byte region [ffff88800d9fd1d0, ffff88800d9fd278) [ 34.811400] [ 34.811625] The buggy address belongs to the physical page: [ 34.812325] page:0000000084d80d10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9fd [ 34.813481] memcg:ffff88800e558101 [ 34.813936] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.814622] page_type: 0xffffffff() [ 34.815102] raw: 0100000000000200 ffff88800879fc80 ffffea00003fbc00 dead000000000008 [ 34.816077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e558101 [ 34.817061] page dumped because: kasan: bad access detected [ 34.817760] [ 34.817982] Memory state around the buggy address: [ 34.818593] ffff88800d9fd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.819501] ffff88800d9fd180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.820400] >ffff88800d9fd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.821314] ^ [ 34.821902] ffff88800d9fd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.822809] ffff88800d9fd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.823713] ================================================================== [ 34.824897] Disabling lock debugging due to kernel taint [ 36.983443] BUG: Bad rss-counter state mm:00000000383896c0 type:MM_FILEPAGES val:33 [ 36.985171] BUG: Bad rss-counter state mm:00000000383896c0 type:MM_ANONPAGES val:22 [ 37.606281] BUG: Bad rss-counter state mm:0000000085768998 type:MM_FILEPAGES val:33 [ 37.607344] BUG: Bad rss-counter state mm:0000000085768998 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35418' (ECDSA) to the list of known hosts. 2023/06/19 18:42:48 fuzzer started 2023/06/19 18:42:48 dialing manager at localhost:44161 2023/06/19 18:42:48 checking machine... 2023/06/19 18:42:48 checking revisions... [ 38.201873] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:48 testing simple program... [ 38.238974] cgroup: Unknown subsys name 'net' [ 38.296219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc54e26268 CR3=000000000e310000 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=2037343a32343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000039ae08 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffffea000039af10 RSI=0000000000000008 RDI=ffff88806cf40198 RBP=0000000000000000 RSP=ffff88801c6e7598 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffea000039af08 R13=ffff88807ffdc5c0 R14=0000000000000000 R15=ffff88807ffdc500 RIP=ffffffff8178f714 RFL=00000046 [---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 00007f88c1bf8900 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=00007f88c21af618 CR3=000000000f27a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000