syzkaller login: [ 30.684470] BUG: Bad rss-counter state mm:00000000541f3208 type:MM_FILEPAGES val:33 [ 30.686209] BUG: Bad rss-counter state mm:00000000541f3208 type:MM_ANONPAGES val:22 [ 30.854652] ================================================================== [ 30.855745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.857054] Read of size 8 at addr ffff88800c515a50 by task sshd/220 [ 30.858035] [ 30.858245] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.859121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860083] Call Trace: [ 30.860411] [ 30.860722] dump_stack_lvl+0x91/0xf0 [ 30.861247] print_report+0xcc/0x620 [ 30.861730] ? __virt_addr_valid+0x102/0x340 [ 30.862261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862863] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863462] kasan_report+0xbe/0xf0 [ 30.863951] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864604] vma_interval_tree_remove+0xc75/0xec0 [ 30.865237] vma_prepare+0xc54/0x11a0 [ 30.865777] __split_vma+0x5af/0x950 [ 30.866230] ? __pfx___split_vma+0x10/0x10 [ 30.866748] ? find_held_lock+0x2c/0x110 [ 30.867244] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867800] ? lock_is_held_type+0x9f/0x120 [ 30.868314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868903] ? mtree_range_walk+0x632/0x900 [ 30.869450] ? mas_walk+0x5c7/0x7c0 [ 30.869920] do_vmi_munmap+0x1f1/0x2b0 [ 30.870390] mmap_region+0x1f9/0x2660 [ 30.870888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.872107] ? __pfx_lock_acquire+0x10/0x10 [ 30.872658] ? __pfx_mmap_region+0x10/0x10 [ 30.873193] ? security_mmap_addr+0x7d/0xa0 [ 30.873735] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874292] do_mmap+0x854/0xf00 [ 30.874736] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875795] ksys_mmap_pgoff+0x3af/0x500 [ 30.876292] do_syscall_64+0x3f/0x90 [ 30.876776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877439] RIP: 0033:0x7f6572b73d82 [ 30.877894] 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 [ 30.880151] RSP: 002b:00007ffc33369e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.881223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6572b73d82 [ 30.882340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6571fad000 [ 30.883411] RBP: 00007f6571fad000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884471] R10: 0000000000000812 R11: 0000000000000206 R12: 000055767c526d90 [ 30.885569] R13: 00007ffc33369e70 R14: 00007ffc33369ea0 R15: 00007ffc3336a200 [ 30.886605] [ 30.887004] [ 30.887303] Allocated by task 213: [ 30.887838] kasan_save_stack+0x22/0x50 [ 30.888481] kasan_set_track+0x25/0x30 [ 30.889171] __kasan_slab_alloc+0x59/0x70 [ 30.889840] kmem_cache_alloc+0x16b/0x370 [ 30.890466] vm_area_dup+0x20/0x160 [ 30.891095] __split_vma+0x170/0x950 [ 30.891647] split_vma+0xc6/0x110 [ 30.892250] mprotect_fixup+0x8d2/0xb30 [ 30.892901] do_mprotect_pkey+0x87e/0xd40 [ 30.893507] __x64_sys_mprotect+0x78/0xc0 [ 30.894228] do_syscall_64+0x3f/0x90 [ 30.894814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895624] [ 30.895921] Freed by task 213: [ 30.896463] kasan_save_stack+0x22/0x50 [ 30.897037] kasan_set_track+0x25/0x30 [ 30.897611] kasan_save_free_info+0x2b/0x50 [ 30.898464] __kasan_slab_free+0x10a/0x190 [ 30.899192] kmem_cache_free+0x10d/0x4d0 [ 30.899796] rcu_core+0x8c8/0x2860 [ 30.900410] __do_softirq+0x1b7/0x7d4 [ 30.900977] [ 30.901283] Last potentially related work creation: [ 30.901985] kasan_save_stack+0x22/0x50 [ 30.902679] __kasan_record_aux_stack+0x8e/0xa0 [ 30.903357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.904244] remove_vma+0x139/0x170 [ 30.904726] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.905497] do_vmi_munmap+0x1f1/0x2b0 [ 30.906179] __vm_munmap+0x138/0x3a0 [ 30.906749] __x64_sys_munmap+0x59/0x80 [ 30.907438] do_syscall_64+0x3f/0x90 [ 30.908022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.908758] [ 30.909048] The buggy address belongs to the object at ffff88800c5159f8 [ 30.909048] which belongs to the cache vm_area_struct of size 168 [ 30.910819] The buggy address is located 88 bytes inside of [ 30.910819] freed 168-byte region [ffff88800c5159f8, ffff88800c515aa0) [ 30.912538] [ 30.912832] The buggy address belongs to the physical page: [ 30.913727] page:0000000054f68ac2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc515 [ 30.914958] memcg:ffff88800ed6f301 [ 30.915502] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.916138] page_type: 0xffffffff() [ 30.916692] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.917859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed6f301 [ 30.918798] page dumped because: kasan: bad access detected [ 30.919656] [ 30.919954] Memory state around the buggy address: [ 30.920659] ffff88800c515900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.921686] ffff88800c515980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.922744] >ffff88800c515a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923763] ^ [ 30.924451] ffff88800c515a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.925548] ffff88800c515b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.926649] ================================================================== [ 30.927893] Disabling lock debugging due to kernel taint [ 33.689427] BUG: Bad rss-counter state mm:0000000078d68e29 type:MM_FILEPAGES val:33 [ 33.690279] BUG: Bad rss-counter state mm:0000000078d68e29 type:MM_ANONPAGES val:22 [ 34.257799] BUG: Bad rss-counter state mm:00000000ec95e503 type:MM_FILEPAGES val:33 [ 34.258979] BUG: Bad rss-counter state mm:00000000ec95e503 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35335' (ECDSA) to the list of known hosts. 2023/06/20 15:23:42 fuzzer started 2023/06/20 15:23:42 dialing manager at localhost:36067 2023/06/20 15:23:42 checking machine... 2023/06/20 15:23:42 checking revisions... [ 34.851390] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:23:42 testing simple program... [ 34.886635] cgroup: Unknown subsys name 'net' [ 34.920437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:41 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710b9 RSP=ffff88800fdef7c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000027 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4eebf3b900 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=00007f4eeb3a7e30 CR3=000000000e850000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a2c5bf30078873a100000000000ae988 XMM05=aafacf85bd0a9d220000000000132568 XMM06=4fda316b135da52b0000000000131358 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffe97e04000 CR3=000000000f09e000 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=33323a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000