syzkaller login: [ 35.699109] BUG: Bad rss-counter state mm:000000005503b9ce type:MM_FILEPAGES val:33 [ 35.700348] BUG: Bad rss-counter state mm:000000005503b9ce type:MM_ANONPAGES val:22 [ 35.860819] ================================================================== [ 35.861673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.862561] Read of size 8 at addr ffff888019ec8140 by task sshd/220 [ 35.863283] [ 35.863491] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.864412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.865328] Call Trace: [ 35.865627] [ 35.865896] dump_stack_lvl+0x91/0xf0 [ 35.866385] print_report+0xcc/0x620 [ 35.866846] ? __virt_addr_valid+0x102/0x340 [ 35.867364] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.867950] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.868531] kasan_report+0xbe/0xf0 [ 35.868981] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.869570] vma_interval_tree_remove+0xc75/0xec0 [ 35.870159] vma_prepare+0xc54/0x11a0 [ 35.870624] __split_vma+0x5af/0x950 [ 35.871082] ? __pfx___split_vma+0x10/0x10 [ 35.871594] ? find_held_lock+0x2c/0x110 [ 35.872111] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.872657] ? lock_is_held_type+0x9f/0x120 [ 35.873191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.873780] ? mtree_range_walk+0x632/0x900 [ 35.874326] ? mas_walk+0x5c7/0x7c0 [ 35.874793] do_vmi_munmap+0x1f1/0x2b0 [ 35.875274] mmap_region+0x1f9/0x2660 [ 35.875759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.876266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.876968] ? __pfx_lock_acquire+0x10/0x10 [ 35.877470] ? __pfx_mmap_region+0x10/0x10 [ 35.877982] ? security_mmap_addr+0x7d/0xa0 [ 35.878497] ? get_unmapped_area+0x1f5/0x3f0 [ 35.879031] do_mmap+0x854/0xf00 [ 35.879458] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.879953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.880497] ksys_mmap_pgoff+0x3af/0x500 [ 35.880992] do_syscall_64+0x3f/0x90 [ 35.881457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.882084] RIP: 0033:0x7f376dd96d82 [ 35.882528] 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 [ 35.884588] RSP: 002b:00007ffd30873d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.885462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f376dd96d82 [ 35.886292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f376d1d0000 [ 35.887127] RBP: 00007f376d1d0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.887968] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565323eadec0 [ 35.888785] R13: 00007ffd30873d30 R14: 00007ffd30873d60 R15: 00007ffd308740c0 [ 35.889620] [ 35.889908] [ 35.890114] Allocated by task 213: [ 35.890523] kasan_save_stack+0x22/0x50 [ 35.891003] kasan_set_track+0x25/0x30 [ 35.891473] __kasan_slab_alloc+0x59/0x70 [ 35.891992] kmem_cache_alloc+0x16b/0x370 [ 35.892489] vm_area_dup+0x20/0x160 [ 35.892940] __split_vma+0x170/0x950 [ 35.893386] split_vma+0xc6/0x110 [ 35.893809] mprotect_fixup+0x8d2/0xb30 [ 35.894296] do_mprotect_pkey+0x87e/0xd40 [ 35.894798] __x64_sys_mprotect+0x78/0xc0 [ 35.895308] do_syscall_64+0x3f/0x90 [ 35.895783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.896416] [ 35.896620] Freed by task 213: [ 35.896999] kasan_save_stack+0x22/0x50 [ 35.897487] kasan_set_track+0x25/0x30 [ 35.897966] kasan_save_free_info+0x2b/0x50 [ 35.898486] __kasan_slab_free+0x10a/0x190 [ 35.899008] kmem_cache_free+0x10d/0x4d0 [ 35.899502] rcu_core+0x8c8/0x2860 [ 35.899952] __do_softirq+0x1b7/0x7d4 [ 35.900413] [ 35.900621] Last potentially related work creation: [ 35.901183] kasan_save_stack+0x22/0x50 [ 35.901673] __kasan_record_aux_stack+0x8e/0xa0 [ 35.902232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.902850] remove_vma+0x139/0x170 [ 35.903289] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.903860] do_vmi_munmap+0x1f1/0x2b0 [ 35.904325] __vm_munmap+0x138/0x3a0 [ 35.904787] __x64_sys_munmap+0x59/0x80 [ 35.905270] do_syscall_64+0x3f/0x90 [ 35.905735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.906365] [ 35.906576] The buggy address belongs to the object at ffff888019ec80e8 [ 35.906576] which belongs to the cache vm_area_struct of size 168 [ 35.908031] The buggy address is located 88 bytes inside of [ 35.908031] freed 168-byte region [ffff888019ec80e8, ffff888019ec8190) [ 35.909412] [ 35.909638] The buggy address belongs to the physical page: [ 35.910285] page:000000000ff153cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec8 [ 35.911369] memcg:ffff888019c8a501 [ 35.911813] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.912472] page_type: 0xffffffff() [ 35.912938] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.913872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c8a501 [ 35.914793] page dumped because: kasan: bad access detected [ 35.915471] [ 35.915708] Memory state around the buggy address: [ 35.916303] ffff888019ec8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.917181] ffff888019ec8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.918055] >ffff888019ec8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.918916] ^ [ 35.919559] ffff888019ec8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.920422] ffff888019ec8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.921272] ================================================================== [ 35.922228] Disabling lock debugging due to kernel taint [ 37.796869] BUG: Bad rss-counter state mm:000000003e111821 type:MM_FILEPAGES val:33 [ 37.797804] BUG: Bad rss-counter state mm:000000003e111821 type:MM_ANONPAGES val:22 [ 38.329747] BUG: Bad rss-counter state mm:00000000478a33d3 type:MM_FILEPAGES val:33 [ 38.330957] BUG: Bad rss-counter state mm:00000000478a33d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32293' (ECDSA) to the list of known hosts. 2023/06/20 05:00:21 fuzzer started 2023/06/20 05:00:22 dialing manager at localhost:44161 2023/06/20 05:00:22 checking machine... 2023/06/20 05:00:22 checking revisions... [ 39.007610] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:00:22 testing simple program... [ 39.061699] cgroup: Unknown subsys name 'net' [ 39.112115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:16 Registers: info registers vcpu 0 RAX=1ffff11002dd33b5 RBX=ffff888016e99d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016e99da8 RBP=ffff888016358540 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016358a80 R14=ffffffff818d9dc6 R15=ffff88800db7df00 RIP=ffffffff81846362 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 00007fdf401f1900 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=00007fdf407a6650 CR3=000000000ebb0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88806cf39500 RBP=ffff888008d87990 RSP=ffff888008d877b8 R8 =0000000000000000 R9 =ffffed100d9e72a0 R10=ffff88806cf39503 R11=0000000000000001 R12=ffff88806cf39500 R13=ffff888008d87910 R14=ffff888008d87910 R15=dffffc0000000000 RIP=ffffffff8126e038 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 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=00007ffc3e260558 CR3=0000000005482000 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=00007fbd130b3510000055a1b15d9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000