syzkaller login: [ 28.703573] BUG: Bad rss-counter state mm:00000000cb21bf5e type:MM_FILEPAGES val:33 [ 28.704949] BUG: Bad rss-counter state mm:00000000cb21bf5e type:MM_ANONPAGES val:22 [ 28.870565] ================================================================== [ 28.871567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.872608] Read of size 8 at addr ffff88801a173310 by task sshd/220 [ 28.873570] [ 28.873820] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.874797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.876269] Call Trace: [ 28.876738] [ 28.877126] dump_stack_lvl+0x91/0xf0 [ 28.877810] print_report+0xcc/0x620 [ 28.878498] ? __virt_addr_valid+0x102/0x340 [ 28.879272] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880129] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.881014] kasan_report+0xbe/0xf0 [ 28.881688] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882564] vma_interval_tree_remove+0xc75/0xec0 [ 28.883425] vma_prepare+0xc54/0x11a0 [ 28.884078] __split_vma+0x5af/0x950 [ 28.884749] ? __pfx___split_vma+0x10/0x10 [ 28.885486] ? find_held_lock+0x2c/0x110 [ 28.886199] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.886981] ? lock_is_held_type+0x9f/0x120 [ 28.887739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.888584] ? mtree_range_walk+0x632/0x900 [ 28.889355] ? mas_walk+0x5c7/0x7c0 [ 28.889904] do_vmi_munmap+0x1f1/0x2b0 [ 28.890496] mmap_region+0x1f9/0x2660 [ 28.891045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.891667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.892508] ? __pfx_lock_acquire+0x10/0x10 [ 28.893126] ? __pfx_mmap_region+0x10/0x10 [ 28.893748] ? security_mmap_addr+0x7d/0xa0 [ 28.894382] ? get_unmapped_area+0x1f5/0x3f0 [ 28.895020] do_mmap+0x854/0xf00 [ 28.895551] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.896122] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.896792] ksys_mmap_pgoff+0x3af/0x500 [ 28.897396] do_syscall_64+0x3f/0x90 [ 28.897941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.898700] RIP: 0033:0x7f4dd9f79d82 [ 28.899240] 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 [ 28.901773] RSP: 002b:00007ffc8431d8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.902828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dd9f79d82 [ 28.903832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dd93b3000 [ 28.904832] RBP: 00007f4dd93b3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.905828] R10: 0000000000000812 R11: 0000000000000206 R12: 000055792431bb20 [ 28.906811] R13: 00007ffc8431d910 R14: 00007ffc8431d940 R15: 00007ffc8431dca0 [ 28.907813] [ 28.908147] [ 28.908409] Allocated by task 213: [ 28.908922] kasan_save_stack+0x22/0x50 [ 28.909514] kasan_set_track+0x25/0x30 [ 28.910077] __kasan_slab_alloc+0x59/0x70 [ 28.910678] kmem_cache_alloc+0x16b/0x370 [ 28.911294] vm_area_dup+0x20/0x160 [ 28.911811] __split_vma+0x170/0x950 [ 28.912350] split_vma+0xc6/0x110 [ 28.912859] mprotect_fixup+0x8d2/0xb30 [ 28.913444] do_mprotect_pkey+0x87e/0xd40 [ 28.914035] __x64_sys_mprotect+0x78/0xc0 [ 28.914745] do_syscall_64+0x3f/0x90 [ 28.915470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916203] [ 28.916464] Freed by task 213: [ 28.916956] kasan_save_stack+0x22/0x50 [ 28.917542] kasan_set_track+0x25/0x30 [ 28.918103] kasan_save_free_info+0x2b/0x50 [ 28.918726] __kasan_slab_free+0x10a/0x190 [ 28.919356] kmem_cache_free+0x10d/0x4d0 [ 28.919933] rcu_core+0x8c8/0x2860 [ 28.920451] __do_softirq+0x1b7/0x7d4 [ 28.921004] [ 28.921260] Last potentially related work creation: [ 28.921925] kasan_save_stack+0x22/0x50 [ 28.922515] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923912] remove_vma+0x139/0x170 [ 28.924440] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925085] do_vmi_munmap+0x1f1/0x2b0 [ 28.925654] __vm_munmap+0x138/0x3a0 [ 28.926191] __x64_sys_munmap+0x59/0x80 [ 28.926763] do_syscall_64+0x3f/0x90 [ 28.927324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.928051] [ 28.928308] The buggy address belongs to the object at ffff88801a1732b8 [ 28.928308] which belongs to the cache vm_area_struct of size 168 [ 28.930022] The buggy address is located 88 bytes inside of [ 28.930022] freed 168-byte region [ffff88801a1732b8, ffff88801a173360) [ 28.931606] [ 28.931850] The buggy address belongs to the physical page: [ 28.932608] page:00000000b2a88b6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a173 [ 28.933847] memcg:ffff88801a094301 [ 28.934340] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.935061] page_type: 0xffffffff() [ 28.935586] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.936635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a094301 [ 28.937685] page dumped because: kasan: bad access detected [ 28.938437] [ 28.938669] Memory state around the buggy address: [ 28.939325] ffff88801a173200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.940266] ffff88801a173280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.941251] >ffff88801a173300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.942214] ^ [ 28.942752] ffff88801a173380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.943738] ffff88801a173400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.944718] ================================================================== [ 28.945864] Disabling lock debugging due to kernel taint [ 31.057035] BUG: Bad rss-counter state mm:000000007c13c5c2 type:MM_FILEPAGES val:33 [ 31.058479] BUG: Bad rss-counter state mm:000000007c13c5c2 type:MM_ANONPAGES val:22 [ 31.527235] BUG: Bad rss-counter state mm:00000000a39b71c4 type:MM_FILEPAGES val:33 [ 31.528644] BUG: Bad rss-counter state mm:00000000a39b71c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41553' (ECDSA) to the list of known hosts. 2023/06/21 03:50:27 fuzzer started 2023/06/21 03:50:28 dialing manager at localhost:36067 2023/06/21 03:50:28 checking machine... 2023/06/21 03:50:28 checking revisions... [ 32.138707] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:50:28 testing simple program... [ 32.182183] cgroup: Unknown subsys name 'net' [ 32.222741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:50:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd7f1fdb48 CR3=0000000005482000 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=00007fd610cea510000055ced1acc790 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 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11002d69f68 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888016b4fb28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff8135b930 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9abf639900 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=00007f9abfbf10b0 CR3=000000001ce10000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000