syzkaller login: [ 23.682143] BUG: Bad rss-counter state mm:00000000785315f6 type:MM_FILEPAGES val:33 [ 23.683515] BUG: Bad rss-counter state mm:00000000785315f6 type:MM_ANONPAGES val:22 [ 23.842261] ================================================================== [ 23.843331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.844446] Read of size 8 at addr ffff88800d8cb798 by task sshd/219 [ 23.845484] [ 23.845748] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.846790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.847946] Call Trace: [ 23.848335] [ 23.848692] dump_stack_lvl+0x91/0xf0 [ 23.849302] print_report+0xcc/0x620 [ 23.849816] ? __virt_addr_valid+0x102/0x340 [ 23.850366] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850992] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.851609] kasan_report+0xbe/0xf0 [ 23.852084] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.852702] vma_interval_tree_remove+0xc75/0xec0 [ 23.853311] vma_prepare+0xc54/0x11a0 [ 23.853790] __split_vma+0x5af/0x950 [ 23.854266] ? __pfx___split_vma+0x10/0x10 [ 23.854794] ? find_held_lock+0x2c/0x110 [ 23.855316] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.855882] ? lock_is_held_type+0x9f/0x120 [ 23.856420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.857035] ? mtree_range_walk+0x632/0x900 [ 23.857587] ? mas_walk+0x5c7/0x7c0 [ 23.858066] do_vmi_munmap+0x1f1/0x2b0 [ 23.858557] mmap_region+0x1f9/0x2660 [ 23.859036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.859540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.860243] ? __pfx_lock_acquire+0x10/0x10 [ 23.860747] ? __pfx_mmap_region+0x10/0x10 [ 23.861266] ? security_mmap_addr+0x7d/0xa0 [ 23.861771] ? get_unmapped_area+0x1f5/0x3f0 [ 23.862293] do_mmap+0x854/0xf00 [ 23.862709] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.863177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.863746] ksys_mmap_pgoff+0x3af/0x500 [ 23.864236] do_syscall_64+0x3f/0x90 [ 23.864698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.865327] RIP: 0033:0x7f40e55dbd82 [ 23.865765] 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 [ 23.867747] RSP: 002b:00007ffcd4074648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.868603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40e55dbd82 [ 23.869412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40e4a15000 [ 23.870281] RBP: 00007f40e4a15000 R08: 0000000000000009 R09: 0000000000001000 [ 23.871194] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4eb2efd90 [ 23.872057] R13: 00007ffcd4074660 R14: 00007ffcd4074690 R15: 00007ffcd40749f0 [ 23.872941] [ 23.873235] [ 23.873452] Allocated by task 212: [ 23.873884] kasan_save_stack+0x22/0x50 [ 23.874394] kasan_set_track+0x25/0x30 [ 23.874893] __kasan_slab_alloc+0x59/0x70 [ 23.875418] kmem_cache_alloc+0x16b/0x370 [ 23.875945] vm_area_dup+0x20/0x160 [ 23.876399] __split_vma+0x170/0x950 [ 23.876885] split_vma+0xc6/0x110 [ 23.877327] mprotect_fixup+0x8d2/0xb30 [ 23.877830] do_mprotect_pkey+0x87e/0xd40 [ 23.878349] __x64_sys_mprotect+0x78/0xc0 [ 23.878872] do_syscall_64+0x3f/0x90 [ 23.879351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.879985] [ 23.880205] Freed by task 212: [ 23.880596] kasan_save_stack+0x22/0x50 [ 23.881105] kasan_set_track+0x25/0x30 [ 23.881598] kasan_save_free_info+0x2b/0x50 [ 23.882132] __kasan_slab_free+0x10a/0x190 [ 23.882656] kmem_cache_free+0x10d/0x4d0 [ 23.883170] rcu_core+0x8c8/0x2860 [ 23.883615] __do_softirq+0x1b7/0x7d4 [ 23.884094] [ 23.884307] Last potentially related work creation: [ 23.884915] kasan_save_stack+0x22/0x50 [ 23.885445] __kasan_record_aux_stack+0x8e/0xa0 [ 23.886031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.886637] remove_vma+0x139/0x170 [ 23.887069] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.887599] do_vmi_munmap+0x1f1/0x2b0 [ 23.888062] __vm_munmap+0x138/0x3a0 [ 23.888509] __x64_sys_munmap+0x59/0x80 [ 23.888992] do_syscall_64+0x3f/0x90 [ 23.889448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.890053] [ 23.890258] The buggy address belongs to the object at ffff88800d8cb740 [ 23.890258] which belongs to the cache vm_area_struct of size 168 [ 23.891624] The buggy address is located 88 bytes inside of [ 23.891624] freed 168-byte region [ffff88800d8cb740, ffff88800d8cb7e8) [ 23.892979] [ 23.893198] The buggy address belongs to the physical page: [ 23.893853] page:00000000c54dc7d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8cb [ 23.894957] memcg:ffff88800e929701 [ 23.895383] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.896023] page_type: 0xffffffff() [ 23.896492] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.897457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e929701 [ 23.898384] page dumped because: kasan: bad access detected [ 23.899056] [ 23.899272] Memory state around the buggy address: [ 23.899865] ffff88800d8cb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.900740] ffff88800d8cb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.901639] >ffff88800d8cb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.902510] ^ [ 23.903016] ffff88800d8cb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.903889] ffff88800d8cb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.904744] ================================================================== [ 23.905705] Disabling lock debugging due to kernel taint [ 25.992287] BUG: Bad rss-counter state mm:0000000031d2c22b type:MM_FILEPAGES val:33 [ 25.993116] BUG: Bad rss-counter state mm:0000000031d2c22b type:MM_ANONPAGES val:22 [ 26.460122] BUG: Bad rss-counter state mm:000000004eac1627 type:MM_FILEPAGES val:33 [ 26.461303] BUG: Bad rss-counter state mm:000000004eac1627 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12365' (ECDSA) to the list of known hosts. 2023/06/21 05:27:33 fuzzer started 2023/06/21 05:27:33 dialing manager at localhost:36067 2023/06/21 05:27:33 checking machine... 2023/06/21 05:27:33 checking revisions... [ 27.180790] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:27:33 testing simple program... [ 27.229142] cgroup: Unknown subsys name 'net' [ 27.278501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:27:32 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001f3ded6 RSP=ffff88800f9ef680 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800d60e760 R13=ffffffff81704d42 R14=00000000000000a4 R15=ffff88800f9efe70 RIP=ffffffff8180f079 RFL=00000212 [----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 00007f860d7a2900 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=00007f860dd59618 CR3=000000000e708000 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=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 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=00007f31c1414f40 CR3=000000000d816000 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=37323a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323537 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000