syzkaller login: [ 47.241935] BUG: Bad rss-counter state mm:000000000cfb5b78 type:MM_FILEPAGES val:33 [ 47.243950] BUG: Bad rss-counter state mm:000000000cfb5b78 type:MM_ANONPAGES val:22 [ 47.407801] ================================================================== [ 47.408704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.409658] Read of size 8 at addr ffff88800eae9968 by task sshd/219 [ 47.410533] [ 47.410752] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.411631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.412627] Call Trace: [ 47.412952] [ 47.413240] dump_stack_lvl+0x91/0xf0 [ 47.413736] print_report+0xcc/0x620 [ 47.414227] ? __virt_addr_valid+0x102/0x340 [ 47.414781] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.415433] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.416046] kasan_report+0xbe/0xf0 [ 47.416528] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.417160] vma_interval_tree_remove+0xc75/0xec0 [ 47.417772] vma_prepare+0xc54/0x11a0 [ 47.418252] __split_vma+0x5af/0x950 [ 47.418724] ? __pfx___split_vma+0x10/0x10 [ 47.419268] ? find_held_lock+0x2c/0x110 [ 47.419794] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.420361] ? lock_is_held_type+0x9f/0x120 [ 47.420903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.421514] ? mtree_range_walk+0x632/0x900 [ 47.422073] ? mas_walk+0x5c7/0x7c0 [ 47.422549] do_vmi_munmap+0x1f1/0x2b0 [ 47.423046] mmap_region+0x1f9/0x2660 [ 47.423540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.424059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.424781] ? __pfx_lock_acquire+0x10/0x10 [ 47.425320] ? __pfx_mmap_region+0x10/0x10 [ 47.425852] ? security_mmap_addr+0x7d/0xa0 [ 47.426391] ? get_unmapped_area+0x1f5/0x3f0 [ 47.426951] do_mmap+0x854/0xf00 [ 47.427413] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.427917] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.428493] ksys_mmap_pgoff+0x3af/0x500 [ 47.429010] do_syscall_64+0x3f/0x90 [ 47.429498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.430154] RIP: 0033:0x7fa3ecf83d82 [ 47.430614] 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 [ 47.432785] RSP: 002b:00007ffd370e8ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.433708] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3ecf83d82 [ 47.434567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3ec3bd000 [ 47.435443] RBP: 00007fa3ec3bd000 R08: 0000000000000009 R09: 0000000000001000 [ 47.436303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f99548cec0 [ 47.437163] R13: 00007ffd370e8b00 R14: 00007ffd370e8b30 R15: 00007ffd370e8e90 [ 47.438030] [ 47.438324] [ 47.438542] Allocated by task 212: [ 47.438976] kasan_save_stack+0x22/0x50 [ 47.439493] kasan_set_track+0x25/0x30 [ 47.439995] __kasan_slab_alloc+0x59/0x70 [ 47.440526] kmem_cache_alloc+0x16b/0x370 [ 47.441048] vm_area_dup+0x20/0x160 [ 47.441510] __split_vma+0x170/0x950 [ 47.441982] split_vma+0xc6/0x110 [ 47.442427] mprotect_fixup+0x8d2/0xb30 [ 47.442938] do_mprotect_pkey+0x87e/0xd40 [ 47.443475] __x64_sys_mprotect+0x78/0xc0 [ 47.444002] do_syscall_64+0x3f/0x90 [ 47.444478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.445132] [ 47.445347] Freed by task 212: [ 47.445744] kasan_save_stack+0x22/0x50 [ 47.446255] kasan_set_track+0x25/0x30 [ 47.446752] kasan_save_free_info+0x2b/0x50 [ 47.447317] __kasan_slab_free+0x10a/0x190 [ 47.447854] kmem_cache_free+0x10d/0x4d0 [ 47.448371] rcu_core+0x8c8/0x2860 [ 47.448820] __do_softirq+0x1b7/0x7d4 [ 47.449307] [ 47.449525] Last potentially related work creation: [ 47.450111] kasan_save_stack+0x22/0x50 [ 47.450626] __kasan_record_aux_stack+0x8e/0xa0 [ 47.451213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.451873] remove_vma+0x139/0x170 [ 47.452327] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.452895] do_vmi_munmap+0x1f1/0x2b0 [ 47.453382] __vm_munmap+0x138/0x3a0 [ 47.453860] __x64_sys_munmap+0x59/0x80 [ 47.454364] do_syscall_64+0x3f/0x90 [ 47.454847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.455499] [ 47.455712] Second to last potentially related work creation: [ 47.456410] kasan_save_stack+0x22/0x50 [ 47.456937] __kasan_record_aux_stack+0x8e/0xa0 [ 47.457522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.458171] remove_vma+0x139/0x170 [ 47.458626] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.459203] do_vmi_munmap+0x1f1/0x2b0 [ 47.459715] mmap_region+0x1f9/0x2660 [ 47.460194] do_mmap+0x854/0xf00 [ 47.460646] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.461143] ksys_mmap_pgoff+0x7d/0x500 [ 47.461651] do_syscall_64+0x3f/0x90 [ 47.462129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.462787] [ 47.463005] The buggy address belongs to the object at ffff88800eae9910 [ 47.463005] which belongs to the cache vm_area_struct of size 168 [ 47.464525] The buggy address is located 88 bytes inside of [ 47.464525] freed 168-byte region [ffff88800eae9910, ffff88800eae99b8) [ 47.465982] [ 47.466203] The buggy address belongs to the physical page: [ 47.466879] page:00000000c5b9449e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeae9 [ 47.468007] memcg:ffff88800e916601 [ 47.468434] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.469144] page_type: 0xffffffff() [ 47.469609] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 47.470553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e916601 [ 47.471506] page dumped because: kasan: bad access detected [ 47.472185] [ 47.472411] Memory state around the buggy address: [ 47.473004] ffff88800eae9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 47.473884] ffff88800eae9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 47.474754] >ffff88800eae9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.475629] ^ [ 47.476412] ffff88800eae9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 47.477273] ffff88800eae9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.478136] ================================================================== [ 47.479156] Disabling lock debugging due to kernel taint [ 49.404052] BUG: Bad rss-counter state mm:00000000e9ecf4dc type:MM_FILEPAGES val:33 [ 49.405353] BUG: Bad rss-counter state mm:00000000e9ecf4dc type:MM_ANONPAGES val:22 [ 49.900938] BUG: Bad rss-counter state mm:00000000258b0e39 type:MM_FILEPAGES val:33 [ 49.902077] BUG: Bad rss-counter state mm:00000000258b0e39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15729' (ECDSA) to the list of known hosts. 2023/06/19 22:25:35 fuzzer started 2023/06/19 22:25:35 dialing manager at localhost:44161 2023/06/19 22:25:35 checking machine... 2023/06/19 22:25:35 checking revisions... [ 50.613170] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:25:36 testing simple program... [ 50.664284] cgroup: Unknown subsys name 'net' [ 50.709765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:25:27 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff8880176565c0 RCX=ffffea0000000000 RDX=ffffea00005d9401 RSI=ffffffff81234320 RDI=ffff88800844fc80 RBP=ffff88800f837d48 RSP=ffff88800f837d20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800844fc80 R13=ffffea00005d9400 R14=ffffffff81234320 R15=ffff88806ce39500 RIP=ffffffff818098e4 RFL=00000202 [-------] 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 00007fe9db060900 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=00007ffd038bbc38 CR3=000000000e46a000 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=00007f9ec0be75100000558558775790 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=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff88801458ba74 RBP=ffff88801458b680 RSP=ffff8880147a7850 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f4416540c64 R13=0000000000000000 R14=ffff88801458b680 R15=0000000000092cc0 RIP=ffffffff8135bd46 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 00007f4415c87900 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=00007f44151a9018 CR3=000000000caee000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0112d645f4c84f5600000000000ae988 XMM05=507c261e1769dc610000000000136da0 XMM06=dfcdbad4f1609c3700000000001358e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000