syzkaller login: [ 36.596501] BUG: Bad rss-counter state mm:0000000014874af9 type:MM_FILEPAGES val:33 [ 36.597966] BUG: Bad rss-counter state mm:0000000014874af9 type:MM_ANONPAGES val:22 [ 36.638360] ================================================================== [ 36.639361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.640317] Read of size 8 at addr ffff888018352b38 by task sshd/220 [ 36.641256] [ 36.641526] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.642387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.643421] Call Trace: [ 36.643747] [ 36.644041] dump_stack_lvl+0x91/0xf0 [ 36.644607] print_report+0xcc/0x620 [ 36.645145] ? __virt_addr_valid+0x102/0x340 [ 36.645795] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.646433] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.647054] kasan_report+0xbe/0xf0 [ 36.647529] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.648159] vma_interval_tree_remove+0xc75/0xec0 [ 36.648755] vma_prepare+0xc54/0x11a0 [ 36.649240] __split_vma+0x5af/0x950 [ 36.649852] ? __pfx___split_vma+0x10/0x10 [ 36.650393] ? find_held_lock+0x2c/0x110 [ 36.650909] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.651466] ? lock_is_held_type+0x9f/0x120 [ 36.652026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.652625] ? mtree_range_walk+0x632/0x900 [ 36.653175] ? mas_walk+0x5c7/0x7c0 [ 36.653643] do_vmi_munmap+0x1f1/0x2b0 [ 36.654141] mmap_region+0x1f9/0x2660 [ 36.654618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.655126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.655841] ? __pfx_lock_acquire+0x10/0x10 [ 36.656367] ? __pfx_mmap_region+0x10/0x10 [ 36.656893] ? security_mmap_addr+0x7d/0xa0 [ 36.657417] ? get_unmapped_area+0x1f5/0x3f0 [ 36.657960] do_mmap+0x854/0xf00 [ 36.658393] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.658883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.659443] ksys_mmap_pgoff+0x3af/0x500 [ 36.659976] do_syscall_64+0x3f/0x90 [ 36.660449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.661089] RIP: 0033:0x7f03c4a5ed82 [ 36.661544] 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 [ 36.663659] RSP: 002b:00007ffd026f0a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.664577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03c4a5ed82 [ 36.665435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03c3e98000 [ 36.666278] RBP: 00007f03c3e98000 R08: 0000000000000009 R09: 0000000000001000 [ 36.667114] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd23e07ec0 [ 36.667965] R13: 00007ffd026f0a30 R14: 00007ffd026f0a60 R15: 00007ffd026f0dc0 [ 36.668821] [ 36.669113] [ 36.669333] Allocated by task 213: [ 36.669761] kasan_save_stack+0x22/0x50 [ 36.670269] kasan_set_track+0x25/0x30 [ 36.670757] __kasan_slab_alloc+0x59/0x70 [ 36.671280] kmem_cache_alloc+0x16b/0x370 [ 36.671794] vm_area_dup+0x20/0x160 [ 36.672248] __split_vma+0x170/0x950 [ 36.672708] split_vma+0xc6/0x110 [ 36.673152] mprotect_fixup+0x8d2/0xb30 [ 36.673649] do_mprotect_pkey+0x87e/0xd40 [ 36.674167] __x64_sys_mprotect+0x78/0xc0 [ 36.674690] do_syscall_64+0x3f/0x90 [ 36.675172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.675833] [ 36.676050] Freed by task 213: [ 36.676439] kasan_save_stack+0x22/0x50 [ 36.676949] kasan_set_track+0x25/0x30 [ 36.677437] kasan_save_free_info+0x2b/0x50 [ 36.677965] __kasan_slab_free+0x10a/0x190 [ 36.678501] kmem_cache_free+0x10d/0x4d0 [ 36.679007] rcu_core+0x8c8/0x2860 [ 36.679448] __do_softirq+0x1b7/0x7d4 [ 36.679943] [ 36.680162] Last potentially related work creation: [ 36.680746] kasan_save_stack+0x22/0x50 [ 36.681254] __kasan_record_aux_stack+0x8e/0xa0 [ 36.681824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.682457] remove_vma+0x139/0x170 [ 36.682903] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.683453] do_vmi_munmap+0x1f1/0x2b0 [ 36.683948] __vm_munmap+0x138/0x3a0 [ 36.684412] __x64_sys_munmap+0x59/0x80 [ 36.684902] do_syscall_64+0x3f/0x90 [ 36.685375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.686012] [ 36.686225] The buggy address belongs to the object at ffff888018352ae0 [ 36.686225] which belongs to the cache vm_area_struct of size 168 [ 36.687670] The buggy address is located 88 bytes inside of [ 36.687670] freed 168-byte region [ffff888018352ae0, ffff888018352b88) [ 36.689076] [ 36.689292] The buggy address belongs to the physical page: [ 36.689942] page:0000000095660956 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18352 [ 36.691018] memcg:ffff88801834a301 [ 36.691439] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.692147] page_type: 0xffffffff() [ 36.692596] raw: 0100000000000200 ffff88800879fc80 ffffea0000258300 dead000000000005 [ 36.693568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801834a301 [ 36.694463] page dumped because: kasan: bad access detected [ 36.695123] [ 36.695337] Memory state around the buggy address: [ 36.695937] ffff888018352a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.696799] ffff888018352a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.697664] >ffff888018352b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.698524] ^ [ 36.699144] ffff888018352b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.700022] ffff888018352c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.700891] ================================================================== [ 36.701809] Disabling lock debugging due to kernel taint [ 38.608011] BUG: Bad rss-counter state mm:0000000076c16bba type:MM_FILEPAGES val:33 [ 38.608756] BUG: Bad rss-counter state mm:0000000076c16bba type:MM_ANONPAGES val:22 [ 39.082187] BUG: Bad rss-counter state mm:00000000c7c0c147 type:MM_FILEPAGES val:33 [ 39.083462] BUG: Bad rss-counter state mm:00000000c7c0c147 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34973' (ECDSA) to the list of known hosts. 2023/06/19 17:02:03 fuzzer started 2023/06/19 17:02:03 dialing manager at localhost:44161 2023/06/19 17:02:03 checking machine... 2023/06/19 17:02:03 checking revisions... [ 39.824849] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:02:04 testing simple program... [ 39.869405] cgroup: Unknown subsys name 'net' [ 39.933926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:01:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f29f0d6b750 CR3=000000000e650000 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=2033303a32303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801826f448 RSP=ffff88801826f380 R8 =ffffffff864b9d5a R9 =ffff88801826f430 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801826f450 R13=ffff88801826f438 R14=0000000000000005 R15=ffff88801826f3f0 RIP=ffffffff81130b49 RFL=00000246 [---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 00007fb5557e0900 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=00007fb555d97618 CR3=000000001aa64000 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=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