syzkaller login: [ 32.775699] BUG: Bad rss-counter state mm:000000003dcaa065 type:MM_FILEPAGES val:33 [ 32.776918] BUG: Bad rss-counter state mm:000000003dcaa065 type:MM_ANONPAGES val:22 [ 32.818221] ================================================================== [ 32.819130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.820137] Read of size 8 at addr ffff888016756a50 by task sshd/220 [ 32.820913] [ 32.821130] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.822011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.822981] Call Trace: [ 32.823299] [ 32.823585] dump_stack_lvl+0x91/0xf0 [ 32.824076] print_report+0xcc/0x620 [ 32.824560] ? __virt_addr_valid+0x102/0x340 [ 32.825121] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.825740] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.826379] kasan_report+0xbe/0xf0 [ 32.826866] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.827499] vma_interval_tree_remove+0xc75/0xec0 [ 32.828110] vma_prepare+0xc54/0x11a0 [ 32.828598] __split_vma+0x5af/0x950 [ 32.829079] ? __pfx___split_vma+0x10/0x10 [ 32.829612] ? find_held_lock+0x2c/0x110 [ 32.830161] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.830736] ? lock_is_held_type+0x9f/0x120 [ 32.831283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.831898] ? mtree_range_walk+0x632/0x900 [ 32.832460] ? mas_walk+0x5c7/0x7c0 [ 32.832945] do_vmi_munmap+0x1f1/0x2b0 [ 32.833437] mmap_region+0x1f9/0x2660 [ 32.833917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.834440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.835155] ? __pfx_lock_acquire+0x10/0x10 [ 32.835685] ? __pfx_mmap_region+0x10/0x10 [ 32.836214] ? security_mmap_addr+0x7d/0xa0 [ 32.836740] ? get_unmapped_area+0x1f5/0x3f0 [ 32.837288] do_mmap+0x854/0xf00 [ 32.837728] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.838241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.838802] ksys_mmap_pgoff+0x3af/0x500 [ 32.839313] do_syscall_64+0x3f/0x90 [ 32.839784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.840426] RIP: 0033:0x7f10ee0d8d82 [ 32.840886] 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 [ 32.843017] RSP: 002b:00007ffc813166b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.843923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10ee0d8d82 [ 32.844774] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10ed512000 [ 32.845630] RBP: 00007f10ed512000 R08: 0000000000000009 R09: 0000000000001000 [ 32.846492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a389b29b20 [ 32.847353] R13: 00007ffc813166d0 R14: 00007ffc81316700 R15: 00007ffc81316a60 [ 32.848211] [ 32.848503] [ 32.848718] Allocated by task 213: [ 32.849148] kasan_save_stack+0x22/0x50 [ 32.849660] kasan_set_track+0x25/0x30 [ 32.850176] __kasan_slab_alloc+0x59/0x70 [ 32.850702] kmem_cache_alloc+0x16b/0x370 [ 32.851218] vm_area_dup+0x20/0x160 [ 32.851673] __split_vma+0x170/0x950 [ 32.852135] split_vma+0xc6/0x110 [ 32.852583] mprotect_fixup+0x8d2/0xb30 [ 32.853082] do_mprotect_pkey+0x87e/0xd40 [ 32.853610] __x64_sys_mprotect+0x78/0xc0 [ 32.854142] do_syscall_64+0x3f/0x90 [ 32.854618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.855272] [ 32.855491] Freed by task 213: [ 32.855887] kasan_save_stack+0x22/0x50 [ 32.856390] kasan_set_track+0x25/0x30 [ 32.856890] kasan_save_free_info+0x2b/0x50 [ 32.857423] __kasan_slab_free+0x10a/0x190 [ 32.857962] kmem_cache_free+0x10d/0x4d0 [ 32.858483] rcu_core+0x8c8/0x2860 [ 32.858926] __do_softirq+0x1b7/0x7d4 [ 32.859412] [ 32.859629] Last potentially related work creation: [ 32.860216] kasan_save_stack+0x22/0x50 [ 32.860719] __kasan_record_aux_stack+0x8e/0xa0 [ 32.861298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.861952] remove_vma+0x139/0x170 [ 32.862407] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.862963] do_vmi_munmap+0x1f1/0x2b0 [ 32.863449] __vm_munmap+0x138/0x3a0 [ 32.863919] __x64_sys_munmap+0x59/0x80 [ 32.864416] do_syscall_64+0x3f/0x90 [ 32.864887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.865527] [ 32.865743] The buggy address belongs to the object at ffff8880167569f8 [ 32.865743] which belongs to the cache vm_area_struct of size 168 [ 32.867218] The buggy address is located 88 bytes inside of [ 32.867218] freed 168-byte region [ffff8880167569f8, ffff888016756aa0) [ 32.868622] [ 32.868836] The buggy address belongs to the physical page: [ 32.869491] page:000000007deb4390 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16756 [ 32.870607] memcg:ffff88800f218101 [ 32.871035] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.871687] page_type: 0xffffffff() [ 32.872136] raw: 0100000000000200 ffff88800879fc80 ffffea000038a880 dead000000000006 [ 32.873049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f218101 [ 32.873970] page dumped because: kasan: bad access detected [ 32.874635] [ 32.874851] Memory state around the buggy address: [ 32.875435] ffff888016756900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.876282] ffff888016756980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.877135] >ffff888016756a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.877996] ^ [ 32.878688] ffff888016756a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.879534] ffff888016756b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.880392] ================================================================== [ 32.881360] Disabling lock debugging due to kernel taint [ 35.246960] BUG: Bad rss-counter state mm:000000000ba08c77 type:MM_FILEPAGES val:33 [ 35.247959] BUG: Bad rss-counter state mm:000000000ba08c77 type:MM_ANONPAGES val:22 [ 35.720394] BUG: Bad rss-counter state mm:000000003e5c051a type:MM_FILEPAGES val:33 [ 35.721372] BUG: Bad rss-counter state mm:000000003e5c051a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65050' (ECDSA) to the list of known hosts. 2023/06/20 03:02:59 fuzzer started 2023/06/20 03:03:00 dialing manager at localhost:44161 2023/06/20 03:03:00 checking machine... 2023/06/20 03:03:00 checking revisions... [ 36.460741] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:03:00 testing simple program... [ 36.510472] cgroup: Unknown subsys name 'net' [ 36.550994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:02:58 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=00007ffd831502c8 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=00007f0ff203d510000055704dd73790 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=ffff888008e58001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57901 RSI=ffff888008e57928 RDI=ffff888008e57940 RBP=ffff888008e57988 RSP=ffff888008e57858 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e57990 R13=ffff888008e50000 R14=ffff888008e57930 R15=ffff888008e57930 RIP=ffffffff811304d1 RFL=00000292 [--S-A--] 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=00007f6104ab3618 CR3=0000000016632000 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