syzkaller login: [ 32.928476] BUG: Bad rss-counter state mm:00000000fe1a7680 type:MM_FILEPAGES val:33 [ 32.929685] BUG: Bad rss-counter state mm:00000000fe1a7680 type:MM_ANONPAGES val:22 [ 32.971725] ================================================================== [ 32.972669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.973602] Read of size 8 at addr ffff88800fc664e0 by task sshd/220 [ 32.974476] [ 32.974697] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.975561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.976559] Call Trace: [ 32.976879] [ 32.977163] dump_stack_lvl+0x91/0xf0 [ 32.977653] print_report+0xcc/0x620 [ 32.978135] ? __virt_addr_valid+0x102/0x340 [ 32.978690] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.979310] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.979922] kasan_report+0xbe/0xf0 [ 32.980405] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.981036] vma_interval_tree_remove+0xc75/0xec0 [ 32.981639] vma_prepare+0xc54/0x11a0 [ 32.982118] __split_vma+0x5af/0x950 [ 32.982588] ? __pfx___split_vma+0x10/0x10 [ 32.983121] ? find_held_lock+0x2c/0x110 [ 32.983638] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.984220] ? lock_is_held_type+0x9f/0x120 [ 32.984764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.985371] ? mtree_range_walk+0x632/0x900 [ 32.985923] ? mas_walk+0x5c7/0x7c0 [ 32.986399] do_vmi_munmap+0x1f1/0x2b0 [ 32.986893] mmap_region+0x1f9/0x2660 [ 32.987372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.987880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.988603] ? __pfx_lock_acquire+0x10/0x10 [ 32.989136] ? __pfx_mmap_region+0x10/0x10 [ 32.989666] ? security_mmap_addr+0x7d/0xa0 [ 32.990193] ? get_unmapped_area+0x1f5/0x3f0 [ 32.990743] do_mmap+0x854/0xf00 [ 32.991181] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.991680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.992257] ksys_mmap_pgoff+0x3af/0x500 [ 32.992758] do_syscall_64+0x3f/0x90 [ 32.993238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.993880] RIP: 0033:0x7f63a7114d82 [ 32.994341] 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 [ 32.996498] RSP: 002b:00007fffb2853ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.997400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63a7114d82 [ 32.998259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63a654e000 [ 32.999098] RBP: 00007f63a654e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.999950] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572cda51d90 [ 33.000802] R13: 00007fffb2853af0 R14: 00007fffb2853b20 R15: 00007fffb2853e80 [ 33.001664] [ 33.001956] [ 33.002173] Allocated by task 213: [ 33.002604] kasan_save_stack+0x22/0x50 [ 33.003107] kasan_set_track+0x25/0x30 [ 33.003600] __kasan_slab_alloc+0x59/0x70 [ 33.004137] kmem_cache_alloc+0x16b/0x370 [ 33.004657] vm_area_dup+0x20/0x160 [ 33.005110] __split_vma+0x170/0x950 [ 33.005575] split_vma+0xc6/0x110 [ 33.006014] mprotect_fixup+0x8d2/0xb30 [ 33.006511] do_mprotect_pkey+0x87e/0xd40 [ 33.007036] __x64_sys_mprotect+0x78/0xc0 [ 33.007556] do_syscall_64+0x3f/0x90 [ 33.008111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.008871] [ 33.009124] Freed by task 213: [ 33.009583] kasan_save_stack+0x22/0x50 [ 33.010226] kasan_set_track+0x25/0x30 [ 33.010845] kasan_save_free_info+0x2b/0x50 [ 33.011517] __kasan_slab_free+0x10a/0x190 [ 33.012220] kmem_cache_free+0x10d/0x4d0 [ 33.012864] rcu_core+0x8c8/0x2860 [ 33.013422] __do_softirq+0x1b7/0x7d4 [ 33.014025] [ 33.014299] Last potentially related work creation: [ 33.015046] kasan_save_stack+0x22/0x50 [ 33.015683] __kasan_record_aux_stack+0x8e/0xa0 [ 33.016439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.017254] remove_vma+0x139/0x170 [ 33.017828] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.018538] do_vmi_munmap+0x1f1/0x2b0 [ 33.019149] __vm_munmap+0x138/0x3a0 [ 33.019737] __x64_sys_munmap+0x59/0x80 [ 33.020388] do_syscall_64+0x3f/0x90 [ 33.020980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.021794] [ 33.022064] The buggy address belongs to the object at ffff88800fc66488 [ 33.022064] which belongs to the cache vm_area_struct of size 168 [ 33.023936] The buggy address is located 88 bytes inside of [ 33.023936] freed 168-byte region [ffff88800fc66488, ffff88800fc66530) [ 33.025765] [ 33.026035] The buggy address belongs to the physical page: [ 33.026882] page:00000000e5b48199 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc66 [ 33.028276] memcg:ffff8880102db601 [ 33.028820] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.029655] page_type: 0xffffffff() [ 33.030226] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.031400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102db601 [ 33.032566] page dumped because: kasan: bad access detected [ 33.033416] [ 33.033691] Memory state around the buggy address: [ 33.034439] ffff88800fc66380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.035546] ffff88800fc66400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.036665] >ffff88800fc66480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.037744] ^ [ 33.038718] ffff88800fc66500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.039815] ffff88800fc66580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.040919] ================================================================== [ 33.042420] Disabling lock debugging due to kernel taint [ 34.987527] BUG: Bad rss-counter state mm:00000000812a751a type:MM_FILEPAGES val:33 [ 34.988705] BUG: Bad rss-counter state mm:00000000812a751a type:MM_ANONPAGES val:22 [ 35.445641] BUG: Bad rss-counter state mm:00000000b048d37f type:MM_FILEPAGES val:33 [ 35.446810] BUG: Bad rss-counter state mm:00000000b048d37f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39011' (ECDSA) to the list of known hosts. 2023/06/20 01:05:43 fuzzer started 2023/06/20 01:05:43 dialing manager at localhost:44161 2023/06/20 01:05:43 checking machine... 2023/06/20 01:05:43 checking revisions... [ 36.086707] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:05:44 testing simple program... [ 36.140579] cgroup: Unknown subsys name 'net' [ 36.202404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:42 Registers: info registers vcpu 0 RAX=ffffffff83643857 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014707e01 RSI=ffff888014707e08 RDI=ffff888014707e08 RBP=ffff888014707418 RSP=ffff888014707348 R8 =ffffffff863b2894 R9 =ffff888014707400 R10=0000000000038001 R11=000000000008ab76 R12=ffff888014707420 R13=ffff888014707408 R14=ffff888014707e10 R15=ffff8880147073c0 RIP=ffffffff8112fbf3 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 00007efe5e33f900 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=00007efe5d74a370 CR3=000000000c6c6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=456741a983078c8400000000000ae988 XMM05=eb0e90881547f0f000000000001353b8 XMM06=f2a98de83e035ba20000000000134460 XMM07=fb795ef6d65770560000000000124980 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=1ffff1100d9e73fc RSI=0000000000000004 RDI=0000000000000001 RBP=ffffffff85d3d010 RSP=ffff888016667a10 R8 =0000000000000001 R9 =ffffed1002cccf3d R10=0000000000000003 R11=0000000000000000 R12=ffff88806cf39500 R13=ffff88806cf39fe0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81235fa6 RFL=00000046 [---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 00007f38bb350700 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=00007f354f9e4618 CR3=0000000019d32000 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=2033343a35303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35303a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000