syzkaller login: [ 30.553105] BUG: Bad rss-counter state mm:0000000099855947 type:MM_FILEPAGES val:33 [ 30.554373] BUG: Bad rss-counter state mm:0000000099855947 type:MM_ANONPAGES val:22 [ 30.596976] ================================================================== [ 30.597871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.598989] Read of size 8 at addr ffff88800e1816b0 by task sshd/220 [ 30.599904] [ 30.600120] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.600968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.602019] Call Trace: [ 30.602429] [ 30.602715] dump_stack_lvl+0x91/0xf0 [ 30.603287] print_report+0xcc/0x620 [ 30.603904] ? __virt_addr_valid+0x102/0x340 [ 30.604449] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605060] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605672] kasan_report+0xbe/0xf0 [ 30.606146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.606757] vma_interval_tree_remove+0xc75/0xec0 [ 30.607349] vma_prepare+0xc54/0x11a0 [ 30.607835] __split_vma+0x5af/0x950 [ 30.608301] ? __pfx___split_vma+0x10/0x10 [ 30.608849] ? find_held_lock+0x2c/0x110 [ 30.609384] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.609967] ? lock_is_held_type+0x9f/0x120 [ 30.610531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.611147] ? mtree_range_walk+0x632/0x900 [ 30.611735] ? mas_walk+0x5c7/0x7c0 [ 30.612224] do_vmi_munmap+0x1f1/0x2b0 [ 30.612733] mmap_region+0x1f9/0x2660 [ 30.613232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.613762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.614495] ? __pfx_lock_acquire+0x10/0x10 [ 30.615039] ? __pfx_mmap_region+0x10/0x10 [ 30.615590] ? security_mmap_addr+0x7d/0xa0 [ 30.616140] ? get_unmapped_area+0x1f5/0x3f0 [ 30.616707] do_mmap+0x854/0xf00 [ 30.617157] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.617673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.618255] ksys_mmap_pgoff+0x3af/0x500 [ 30.618779] do_syscall_64+0x3f/0x90 [ 30.619269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.619947] RIP: 0033:0x7f7e2132dd82 [ 30.620417] 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 [ 30.622596] RSP: 002b:00007ffc94427b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.623549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e2132dd82 [ 30.624417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e20767000 [ 30.625286] RBP: 00007f7e20767000 R08: 0000000000000009 R09: 0000000000001000 [ 30.626150] R10: 0000000000000812 R11: 0000000000000206 R12: 000056127ed24f70 [ 30.627014] R13: 00007ffc94427b70 R14: 00007ffc94427ba0 R15: 00007ffc94427f00 [ 30.627902] [ 30.628198] [ 30.628422] Allocated by task 213: [ 30.628865] kasan_save_stack+0x22/0x50 [ 30.629389] kasan_set_track+0x25/0x30 [ 30.629894] __kasan_slab_alloc+0x59/0x70 [ 30.630425] kmem_cache_alloc+0x16b/0x370 [ 30.630955] vm_area_dup+0x20/0x160 [ 30.631426] __split_vma+0x170/0x950 [ 30.631924] split_vma+0xc6/0x110 [ 30.632380] mprotect_fixup+0x8d2/0xb30 [ 30.632897] do_mprotect_pkey+0x87e/0xd40 [ 30.633430] __x64_sys_mprotect+0x78/0xc0 [ 30.633969] do_syscall_64+0x3f/0x90 [ 30.634465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635129] [ 30.635355] Freed by task 203: [ 30.635776] kasan_save_stack+0x22/0x50 [ 30.636294] kasan_set_track+0x25/0x30 [ 30.636806] kasan_save_free_info+0x2b/0x50 [ 30.637352] __kasan_slab_free+0x10a/0x190 [ 30.637901] kmem_cache_free+0x10d/0x4d0 [ 30.638421] rcu_core+0x8c8/0x2860 [ 30.638882] __do_softirq+0x1b7/0x7d4 [ 30.639377] [ 30.639613] Last potentially related work creation: [ 30.640217] kasan_save_stack+0x22/0x50 [ 30.640741] __kasan_record_aux_stack+0x8e/0xa0 [ 30.641330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.641985] remove_vma+0x139/0x170 [ 30.642513] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.643092] do_vmi_munmap+0x1f1/0x2b0 [ 30.643599] __vm_munmap+0x138/0x3a0 [ 30.644083] __x64_sys_munmap+0x59/0x80 [ 30.644593] do_syscall_64+0x3f/0x90 [ 30.645092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645751] [ 30.645970] The buggy address belongs to the object at ffff88800e181658 [ 30.645970] which belongs to the cache vm_area_struct of size 168 [ 30.647494] The buggy address is located 88 bytes inside of [ 30.647494] freed 168-byte region [ffff88800e181658, ffff88800e181700) [ 30.648939] [ 30.649162] The buggy address belongs to the physical page: [ 30.649845] page:000000002abb5fbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe181 [ 30.650952] memcg:ffff88800e0bf201 [ 30.651381] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.652126] page_type: 0xffffffff() [ 30.652581] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362b40 dead000000000005 [ 30.653535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0bf201 [ 30.654461] page dumped because: kasan: bad access detected [ 30.655132] [ 30.655351] Memory state around the buggy address: [ 30.655950] ffff88800e181580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.656827] ffff88800e181600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.657703] >ffff88800e181680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.658566] ^ [ 30.659166] ffff88800e181700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.660056] ffff88800e181780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.660923] ================================================================== [ 30.661877] Disabling lock debugging due to kernel taint [ 32.803709] BUG: Bad rss-counter state mm:00000000ed0f23aa type:MM_FILEPAGES val:33 [ 32.804750] BUG: Bad rss-counter state mm:00000000ed0f23aa type:MM_ANONPAGES val:22 [ 33.329115] BUG: Bad rss-counter state mm:00000000c9e0f350 type:MM_FILEPAGES val:33 [ 33.330750] BUG: Bad rss-counter state mm:00000000c9e0f350 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49199' (ECDSA) to the list of known hosts. 2023/06/20 10:51:52 fuzzer started 2023/06/20 10:51:52 dialing manager at localhost:36067 2023/06/20 10:51:52 checking machine... 2023/06/20 10:51:52 checking revisions... [ 34.076974] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:51:52 testing simple program... [ 34.119778] cgroup: Unknown subsys name 'net' [ 34.180077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:51:52 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002064f36 RSI=ffffffff846000aa RDI=ffff888010327a20 RBP=ffff8880103279f0 RSP=ffff888010327950 R8 =0000000000000001 R9 =ffff888010327998 R10=0000000000038001 R11=00000000000b5080 R12=ffff888010327a20 R13=0000000000000000 R14=ffff8880147f1b40 R15=ffff88800d7d2680 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f3fc058e900 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=00007fbc97062c30 CR3=0000000016620000 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=25252525252525252525252525252525 XMM01=ff0000000000ffff0000000000ff0000 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=0000000000000001 RBX=ffff88801b851488 RCX=ffffffff81bafce5 RDX=ffffed100370a292 RSI=0000000000000008 RDI=ffff88801b851488 RBP=dffffc0000000000 RSP=ffff88800950f190 R8 =0000000000000001 R9 =ffffed100370a291 R10=ffff88801b85148f R11=0000000000009293 R12=0000000000000000 R13=0000000000001000 R14=ffffea000073fa40 R15=0000000000000000 RIP=ffffffff81bafce9 RFL=00000286 [--S--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=00007f3fc0393000 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=000000000000000064726f6365722064 XMM01=6c6966206e692027732560206e6f6973 XMM02=5b20732520656c696620796220646572 XMM03=61206e6f6974616d726f666e69206e6f XMM04=6300706163326c5f7462247463656e6e XMM05=601703000004021702000018bc170100 XMM06=150000003b04071600000042122f1500 XMM07=0000050a03d914000011c80300100000 XMM08=d7140000146408000000047113d61400 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000