syzkaller login: [ 38.782441] BUG: Bad rss-counter state mm:000000009d157a6d type:MM_FILEPAGES val:33 [ 38.783182] BUG: Bad rss-counter state mm:000000009d157a6d type:MM_ANONPAGES val:22 [ 38.938867] ================================================================== [ 38.939802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.940740] Read of size 8 at addr ffff8880190b1c20 by task sshd/220 [ 38.941527] [ 38.941922] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.942783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.943757] Call Trace: [ 38.944078] [ 38.944369] dump_stack_lvl+0x91/0xf0 [ 38.944892] print_report+0xcc/0x620 [ 38.945376] ? __virt_addr_valid+0x102/0x340 [ 38.945922] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946544] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947153] kasan_report+0xbe/0xf0 [ 38.947631] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948254] vma_interval_tree_remove+0xc75/0xec0 [ 38.948864] vma_prepare+0xc54/0x11a0 [ 38.949351] __split_vma+0x5af/0x950 [ 38.949823] ? __pfx___split_vma+0x10/0x10 [ 38.950354] ? find_held_lock+0x2c/0x110 [ 38.950878] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.951451] ? lock_is_held_type+0x9f/0x120 [ 38.951999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.952614] ? mtree_range_walk+0x632/0x900 [ 38.953185] ? mas_walk+0x5c7/0x7c0 [ 38.953661] do_vmi_munmap+0x1f1/0x2b0 [ 38.954150] mmap_region+0x1f9/0x2660 [ 38.954638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.955149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.955861] ? __pfx_lock_acquire+0x10/0x10 [ 38.956400] ? __pfx_mmap_region+0x10/0x10 [ 38.956953] ? security_mmap_addr+0x7d/0xa0 [ 38.957483] ? get_unmapped_area+0x1f5/0x3f0 [ 38.958028] do_mmap+0x854/0xf00 [ 38.958479] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.958975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.959545] ksys_mmap_pgoff+0x3af/0x500 [ 38.960050] do_syscall_64+0x3f/0x90 [ 38.960531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961190] RIP: 0033:0x7f6431c82d82 [ 38.961640] 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 [ 38.963770] RSP: 002b:00007ffdd7d25108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.964682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6431c82d82 [ 38.965550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64310bc000 [ 38.966409] RBP: 00007f64310bc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.967263] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9c65eef60 [ 38.968115] R13: 00007ffdd7d25120 R14: 00007ffdd7d25150 R15: 00007ffdd7d254b0 [ 38.968991] [ 38.969284] [ 38.969502] Allocated by task 213: [ 38.969926] kasan_save_stack+0x22/0x50 [ 38.970427] kasan_set_track+0x25/0x30 [ 38.970928] __kasan_slab_alloc+0x59/0x70 [ 38.971456] kmem_cache_alloc+0x16b/0x370 [ 38.971969] vm_area_dup+0x20/0x160 [ 38.972429] __split_vma+0x170/0x950 [ 38.972901] split_vma+0xc6/0x110 [ 38.973350] mprotect_fixup+0x8d2/0xb30 [ 38.973854] do_mprotect_pkey+0x87e/0xd40 [ 38.974378] __x64_sys_mprotect+0x78/0xc0 [ 38.974898] do_syscall_64+0x3f/0x90 [ 38.975378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976022] [ 38.976244] Freed by task 13: [ 38.976623] kasan_save_stack+0x22/0x50 [ 38.977154] kasan_set_track+0x25/0x30 [ 38.977645] kasan_save_free_info+0x2b/0x50 [ 38.978176] __kasan_slab_free+0x10a/0x190 [ 38.978713] kmem_cache_free+0x10d/0x4d0 [ 38.979221] rcu_core+0x8c8/0x2860 [ 38.979668] __do_softirq+0x1b7/0x7d4 [ 38.980146] [ 38.980364] Last potentially related work creation: [ 38.980956] kasan_save_stack+0x22/0x50 [ 38.981462] __kasan_record_aux_stack+0x8e/0xa0 [ 38.982045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.982784] remove_vma+0x139/0x170 [ 38.983242] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.983806] do_vmi_munmap+0x1f1/0x2b0 [ 38.984291] __vm_munmap+0x138/0x3a0 [ 38.984763] __x64_sys_munmap+0x59/0x80 [ 38.985286] do_syscall_64+0x3f/0x90 [ 38.985775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986432] [ 38.986652] The buggy address belongs to the object at ffff8880190b1bc8 [ 38.986652] which belongs to the cache vm_area_struct of size 168 [ 38.988125] The buggy address is located 88 bytes inside of [ 38.988125] freed 168-byte region [ffff8880190b1bc8, ffff8880190b1c70) [ 38.989538] [ 38.989754] The buggy address belongs to the physical page: [ 38.990411] page:00000000f9ee08d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x190b1 [ 38.991516] memcg:ffff88800ea7cb01 [ 38.991946] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.992597] page_type: 0xffffffff() [ 38.993059] raw: 0100000000000200 ffff8880087a0c80 ffffea0000310e80 dead000000000004 [ 38.993983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea7cb01 [ 38.994888] page dumped because: kasan: bad access detected [ 38.995547] [ 38.995763] Memory state around the buggy address: [ 38.996341] ffff8880190b1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.997243] ffff8880190b1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.998098] >ffff8880190b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.998948] ^ [ 38.999486] ffff8880190b1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.000347] ffff8880190b1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.001212] ================================================================== [ 39.002145] Disabling lock debugging due to kernel taint [ 41.536056] BUG: Bad rss-counter state mm:000000006f15a7e0 type:MM_FILEPAGES val:33 [ 41.537039] BUG: Bad rss-counter state mm:000000006f15a7e0 type:MM_ANONPAGES val:22 [ 42.060495] BUG: Bad rss-counter state mm:00000000ef508d0c type:MM_FILEPAGES val:33 [ 42.061453] BUG: Bad rss-counter state mm:00000000ef508d0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4841' (ECDSA) to the list of known hosts. 2023/06/20 15:26:32 fuzzer started 2023/06/20 15:26:32 dialing manager at localhost:36067 2023/06/20 15:26:32 checking machine... 2023/06/20 15:26:32 checking revisions... [ 42.800550] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:26:32 testing simple program... [ 42.860452] cgroup: Unknown subsys name 'net' [ 42.911082] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:31 Registers: info registers vcpu 0 RAX=ffffffff818e01e4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880165675c0 RSI=ffffffff818e01e4 RDI=ffff888016567578 RBP=ffff8880165675d0 RSP=ffff888016567508 R8 =0000000000000001 R9 =ffff8880165675b8 R10=0000000000038001 R11=000000000002454d R12=ffff888016567640 R13=ffff8880165675c0 R14=ffff88800f1bb680 R15=ffff888016567578 RIP=ffffffff81130641 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 00007f4edfb82700 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=00007f25a99f8070 CR3=00000000194de000 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=2031333a36323a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36323a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd2adbea48 CR3=0000000005482000 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=00007f1be617d5100000556d7d7d9790 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