syzkaller login: [ 30.622278] BUG: Bad rss-counter state mm:00000000e172a91c type:MM_FILEPAGES val:33 [ 30.623493] BUG: Bad rss-counter state mm:00000000e172a91c type:MM_ANONPAGES val:22 [ 30.669435] ================================================================== [ 30.670336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.671293] Read of size 8 at addr ffff88800e3ab4e0 by task sshd/219 [ 30.672086] [ 30.672308] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.673177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.674193] Call Trace: [ 30.674527] [ 30.674812] dump_stack_lvl+0x91/0xf0 [ 30.675364] print_report+0xcc/0x620 [ 30.675868] ? __virt_addr_valid+0x102/0x340 [ 30.676438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677728] kasan_report+0xbe/0xf0 [ 30.678207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678834] vma_interval_tree_remove+0xc75/0xec0 [ 30.679440] vma_prepare+0xc54/0x11a0 [ 30.679928] __split_vma+0x5af/0x950 [ 30.680406] ? __pfx___split_vma+0x10/0x10 [ 30.680930] ? find_held_lock+0x2c/0x110 [ 30.681459] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.682022] ? lock_is_held_type+0x9f/0x120 [ 30.682563] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.683166] ? mtree_range_walk+0x632/0x900 [ 30.683721] ? mas_walk+0x5c7/0x7c0 [ 30.684218] do_vmi_munmap+0x1f1/0x2b0 [ 30.684724] mmap_region+0x1f9/0x2660 [ 30.685227] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.685747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.686473] ? __pfx_lock_acquire+0x10/0x10 [ 30.687029] ? __pfx_mmap_region+0x10/0x10 [ 30.687575] ? security_mmap_addr+0x7d/0xa0 [ 30.688148] ? get_unmapped_area+0x1f5/0x3f0 [ 30.688715] do_mmap+0x854/0xf00 [ 30.689169] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.689678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.690271] ksys_mmap_pgoff+0x3af/0x500 [ 30.690796] do_syscall_64+0x3f/0x90 [ 30.691306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691992] RIP: 0033:0x7fc04acfbd82 [ 30.692473] 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 [ 30.694687] RSP: 002b:00007ffd601753d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.695615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc04acfbd82 [ 30.696508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc04a135000 [ 30.697393] RBP: 00007fc04a135000 R08: 0000000000000009 R09: 0000000000001000 [ 30.698271] R10: 0000000000000812 R11: 0000000000000206 R12: 000056191eb92980 [ 30.699157] R13: 00007ffd601753f0 R14: 00007ffd60175420 R15: 00007ffd60175780 [ 30.700071] [ 30.700377] [ 30.700602] Allocated by task 212: [ 30.701043] kasan_save_stack+0x22/0x50 [ 30.701574] kasan_set_track+0x25/0x30 [ 30.702083] __kasan_slab_alloc+0x59/0x70 [ 30.702618] kmem_cache_alloc+0x16b/0x370 [ 30.703148] vm_area_dup+0x20/0x160 [ 30.703620] __split_vma+0x170/0x950 [ 30.704115] split_vma+0xc6/0x110 [ 30.704568] mprotect_fixup+0x8d2/0xb30 [ 30.705090] do_mprotect_pkey+0x87e/0xd40 [ 30.705629] __x64_sys_mprotect+0x78/0xc0 [ 30.706174] do_syscall_64+0x3f/0x90 [ 30.706668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.707342] [ 30.707564] Freed by task 19: [ 30.707965] kasan_save_stack+0x22/0x50 [ 30.708480] kasan_set_track+0x25/0x30 [ 30.708984] kasan_save_free_info+0x2b/0x50 [ 30.709532] __kasan_slab_free+0x10a/0x190 [ 30.710076] kmem_cache_free+0x10d/0x4d0 [ 30.710602] rcu_core+0x8c8/0x2860 [ 30.711063] __do_softirq+0x1b7/0x7d4 [ 30.711559] [ 30.711777] Last potentially related work creation: [ 30.712402] kasan_save_stack+0x22/0x50 [ 30.712920] __kasan_record_aux_stack+0x8e/0xa0 [ 30.713520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.714178] remove_vma+0x139/0x170 [ 30.714649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.715233] do_vmi_munmap+0x1f1/0x2b0 [ 30.715736] __vm_munmap+0x138/0x3a0 [ 30.716226] __x64_sys_munmap+0x59/0x80 [ 30.716747] do_syscall_64+0x3f/0x90 [ 30.717242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.717910] [ 30.718129] Second to last potentially related work creation: [ 30.718839] kasan_save_stack+0x22/0x50 [ 30.719366] __kasan_record_aux_stack+0x8e/0xa0 [ 30.719967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.720631] remove_vma+0x139/0x170 [ 30.721099] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.721676] do_vmi_munmap+0x1f1/0x2b0 [ 30.722181] mmap_region+0x1f9/0x2660 [ 30.722678] do_mmap+0x854/0xf00 [ 30.723120] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.723622] ksys_mmap_pgoff+0x3af/0x500 [ 30.724155] do_syscall_64+0x3f/0x90 [ 30.724647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.725318] [ 30.725539] The buggy address belongs to the object at ffff88800e3ab488 [ 30.725539] which belongs to the cache vm_area_struct of size 168 [ 30.727058] The buggy address is located 88 bytes inside of [ 30.727058] freed 168-byte region [ffff88800e3ab488, ffff88800e3ab530) [ 30.728519] [ 30.728738] The buggy address belongs to the physical page: [ 30.729421] page:00000000bf1f930a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ab [ 30.730545] memcg:ffff88800e08f001 [ 30.730987] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.731713] page_type: 0xffffffff() [ 30.732197] raw: 0100000000000200 ffff8880087a0c80 ffffea00003861c0 dead000000000003 [ 30.733156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e08f001 [ 30.734093] page dumped because: kasan: bad access detected [ 30.734784] [ 30.735011] Memory state around the buggy address: [ 30.735622] ffff88800e3ab380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.736529] ffff88800e3ab400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.737433] >ffff88800e3ab480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.738336] ^ [ 30.739127] ffff88800e3ab500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.740002] ffff88800e3ab580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.740895] ================================================================== [ 30.741896] Disabling lock debugging due to kernel taint [ 32.806491] BUG: Bad rss-counter state mm:00000000e436ea09 type:MM_FILEPAGES val:33 [ 32.807654] BUG: Bad rss-counter state mm:00000000e436ea09 type:MM_ANONPAGES val:22 [ 33.300505] BUG: Bad rss-counter state mm:000000006a106e05 type:MM_FILEPAGES val:33 [ 33.301594] BUG: Bad rss-counter state mm:000000006a106e05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13971' (ECDSA) to the list of known hosts. 2023/06/21 03:38:55 fuzzer started 2023/06/21 03:38:55 dialing manager at localhost:36067 2023/06/21 03:38:55 checking machine... 2023/06/21 03:38:55 checking revisions... [ 33.860681] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:38:55 testing simple program... [ 33.901350] cgroup: Unknown subsys name 'net' [ 33.935437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:55 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=00007ffceef4b8c8 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=00007fe39216d510000056014c12c790 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=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1353 RSI=ffff888016067800 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800e983680 R15=ffff888018e81980 RIP=ffffffff81130368 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 00007f387e26a700 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=00007f736de48890 CR3=000000000eb6e000 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=2034353a38333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000