syzkaller login: [ 38.819370] BUG: Bad rss-counter state mm:0000000026214640 type:MM_FILEPAGES val:33 [ 38.820611] BUG: Bad rss-counter state mm:0000000026214640 type:MM_ANONPAGES val:22 [ 38.859603] ================================================================== [ 38.860627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.861716] Read of size 8 at addr ffff88800d82b228 by task sshd/219 [ 38.862534] [ 38.862767] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.863716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.864749] Call Trace: [ 38.865090] [ 38.865394] dump_stack_lvl+0x91/0xf0 [ 38.865911] print_report+0xcc/0x620 [ 38.866423] ? __virt_addr_valid+0x102/0x340 [ 38.867034] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.867691] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.868340] kasan_report+0xbe/0xf0 [ 38.868862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869528] vma_interval_tree_remove+0xc75/0xec0 [ 38.870169] vma_prepare+0xc54/0x11a0 [ 38.870680] __split_vma+0x5af/0x950 [ 38.871195] ? __pfx___split_vma+0x10/0x10 [ 38.871766] ? find_held_lock+0x2c/0x110 [ 38.872322] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.872932] ? lock_is_held_type+0x9f/0x120 [ 38.873510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.874156] ? mtree_range_walk+0x632/0x900 [ 38.874746] ? mas_walk+0x5c7/0x7c0 [ 38.875267] do_vmi_munmap+0x1f1/0x2b0 [ 38.875791] mmap_region+0x1f9/0x2660 [ 38.876308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.876857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.877622] ? __pfx_lock_acquire+0x10/0x10 [ 38.878193] ? __pfx_mmap_region+0x10/0x10 [ 38.878756] ? security_mmap_addr+0x7d/0xa0 [ 38.879332] ? get_unmapped_area+0x1f5/0x3f0 [ 38.879917] do_mmap+0x854/0xf00 [ 38.880385] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.880910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.881508] ksys_mmap_pgoff+0x3af/0x500 [ 38.882047] do_syscall_64+0x3f/0x90 [ 38.882556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883269] RIP: 0033:0x7faf66edbd82 [ 38.883748] 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 [ 38.886020] RSP: 002b:00007ffedc6ee758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.886982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf66edbd82 [ 38.887884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf66315000 [ 38.888810] RBP: 00007faf66315000 R08: 0000000000000009 R09: 0000000000001000 [ 38.889714] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6362beec0 [ 38.890617] R13: 00007ffedc6ee770 R14: 00007ffedc6ee7a0 R15: 00007ffedc6eeb00 [ 38.891547] [ 38.891857] [ 38.892090] Allocated by task 212: [ 38.892543] kasan_save_stack+0x22/0x50 [ 38.893079] kasan_set_track+0x25/0x30 [ 38.893605] __kasan_slab_alloc+0x59/0x70 [ 38.894165] kmem_cache_alloc+0x16b/0x370 [ 38.894712] vm_area_dup+0x20/0x160 [ 38.895203] __split_vma+0x170/0x950 [ 38.895699] split_vma+0xc6/0x110 [ 38.896168] mprotect_fixup+0x8d2/0xb30 [ 38.896706] do_mprotect_pkey+0x87e/0xd40 [ 38.897259] __x64_sys_mprotect+0x78/0xc0 [ 38.897813] do_syscall_64+0x3f/0x90 [ 38.898323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899016] [ 38.899250] Freed by task 212: [ 38.899672] kasan_save_stack+0x22/0x50 [ 38.900212] kasan_set_track+0x25/0x30 [ 38.900741] kasan_save_free_info+0x2b/0x50 [ 38.901309] __kasan_slab_free+0x10a/0x190 [ 38.901875] kmem_cache_free+0x10d/0x4d0 [ 38.902418] rcu_core+0x8c8/0x2860 [ 38.902893] __do_softirq+0x1b7/0x7d4 [ 38.903431] [ 38.903664] Last potentially related work creation: [ 38.904298] kasan_save_stack+0x22/0x50 [ 38.904870] __kasan_record_aux_stack+0x8e/0xa0 [ 38.905503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.906219] remove_vma+0x139/0x170 [ 38.906714] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.907337] do_vmi_munmap+0x1f1/0x2b0 [ 38.907874] __vm_munmap+0x138/0x3a0 [ 38.908390] __x64_sys_munmap+0x59/0x80 [ 38.908930] do_syscall_64+0x3f/0x90 [ 38.909443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910143] [ 38.910374] The buggy address belongs to the object at ffff88800d82b1d0 [ 38.910374] which belongs to the cache vm_area_struct of size 168 [ 38.912002] The buggy address is located 88 bytes inside of [ 38.912002] freed 168-byte region [ffff88800d82b1d0, ffff88800d82b278) [ 38.913523] [ 38.913759] The buggy address belongs to the physical page: [ 38.914480] page:00000000d73769ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd82b [ 38.915670] memcg:ffff88800df19901 [ 38.916135] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.916832] page_type: 0xffffffff() [ 38.917325] raw: 0100000000000200 ffff8880087a0c80 ffffea0000316840 dead000000000006 [ 38.918327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df19901 [ 38.919311] page dumped because: kasan: bad access detected [ 38.920024] [ 38.920260] Memory state around the buggy address: [ 38.920917] ffff88800d82b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.921852] ffff88800d82b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.922783] >ffff88800d82b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.923696] ^ [ 38.924289] ffff88800d82b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.925215] ffff88800d82b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.926136] ================================================================== [ 38.927403] Disabling lock debugging due to kernel taint [ 40.915388] BUG: Bad rss-counter state mm:00000000850fccf3 type:MM_FILEPAGES val:33 [ 40.916327] BUG: Bad rss-counter state mm:00000000850fccf3 type:MM_ANONPAGES val:22 [ 41.398018] BUG: Bad rss-counter state mm:00000000610900a5 type:MM_FILEPAGES val:33 [ 41.399267] BUG: Bad rss-counter state mm:00000000610900a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57393' (ECDSA) to the list of known hosts. 2023/06/21 05:15:00 fuzzer started 2023/06/21 05:15:00 dialing manager at localhost:36067 2023/06/21 05:15:00 checking machine... 2023/06/21 05:15:00 checking revisions... [ 42.113830] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:15:00 testing simple program... [ 42.170472] cgroup: Unknown subsys name 'net' [ 42.261522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:14:59 Registers: info registers vcpu 0 RAX=1ffffffff0ff2fc8 RBX=ffff888009b221d8 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=ffffffff87f97e40 RSP=ffff88800c767508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000ca300000ca3 R12=0000000000000000 R13=000000000000003b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1949 RFL=00000212 [----A--] 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 00007f1ae8a94900 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=00007f1ae904b618 CR3=000000001bf68000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f47aa631850 CR3=0000000016466000 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=2039353a34313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a34313a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000