syzkaller login: [ 36.099485] BUG: Bad rss-counter state mm:00000000b0aff199 type:MM_FILEPAGES val:33 [ 36.100709] BUG: Bad rss-counter state mm:00000000b0aff199 type:MM_ANONPAGES val:22 [ 36.263109] ================================================================== [ 36.264035] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.264973] Read of size 8 at addr ffff8880145ad3f8 by task sshd/219 [ 36.265742] [ 36.265965] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.266955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.267943] Call Trace: [ 36.268280] [ 36.268563] dump_stack_lvl+0x91/0xf0 [ 36.269053] print_report+0xcc/0x620 [ 36.269542] ? __virt_addr_valid+0x102/0x340 [ 36.270085] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.270709] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.271343] kasan_report+0xbe/0xf0 [ 36.271823] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.272444] vma_interval_tree_remove+0xc75/0xec0 [ 36.273054] vma_prepare+0xc54/0x11a0 [ 36.273538] __split_vma+0x5af/0x950 [ 36.274011] ? __pfx___split_vma+0x10/0x10 [ 36.274545] ? find_held_lock+0x2c/0x110 [ 36.275082] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.275685] ? lock_is_held_type+0x9f/0x120 [ 36.276270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.276892] ? mtree_range_walk+0x632/0x900 [ 36.277466] ? mas_walk+0x5c7/0x7c0 [ 36.277956] do_vmi_munmap+0x1f1/0x2b0 [ 36.278452] mmap_region+0x1f9/0x2660 [ 36.278956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.279471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.280186] ? __pfx_lock_acquire+0x10/0x10 [ 36.280723] ? __pfx_mmap_region+0x10/0x10 [ 36.281253] ? security_mmap_addr+0x7d/0xa0 [ 36.281789] ? get_unmapped_area+0x1f5/0x3f0 [ 36.282342] do_mmap+0x854/0xf00 [ 36.282795] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.283291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.283854] ksys_mmap_pgoff+0x3af/0x500 [ 36.284358] do_syscall_64+0x3f/0x90 [ 36.284844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.285500] RIP: 0033:0x7f0624297d82 [ 36.285955] 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 [ 36.288135] RSP: 002b:00007ffdfd0d20e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.289055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0624297d82 [ 36.289900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06236d1000 [ 36.290774] RBP: 00007f06236d1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.291639] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b0fe77ec0 [ 36.292510] R13: 00007ffdfd0d2100 R14: 00007ffdfd0d2130 R15: 00007ffdfd0d2490 [ 36.293391] [ 36.293685] [ 36.293910] Allocated by task 212: [ 36.294348] kasan_save_stack+0x22/0x50 [ 36.294875] kasan_set_track+0x25/0x30 [ 36.295385] __kasan_slab_alloc+0x59/0x70 [ 36.295950] kmem_cache_alloc+0x16b/0x370 [ 36.296464] vm_area_dup+0x20/0x160 [ 36.296936] __split_vma+0x170/0x950 [ 36.297412] split_vma+0xc6/0x110 [ 36.297852] mprotect_fixup+0x8d2/0xb30 [ 36.298355] do_mprotect_pkey+0x87e/0xd40 [ 36.298883] __x64_sys_mprotect+0x78/0xc0 [ 36.299405] do_syscall_64+0x3f/0x90 [ 36.299873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.300558] [ 36.300779] Freed by task 212: [ 36.301172] kasan_save_stack+0x22/0x50 [ 36.301681] kasan_set_track+0x25/0x30 [ 36.302201] kasan_save_free_info+0x2b/0x50 [ 36.302757] __kasan_slab_free+0x10a/0x190 [ 36.303292] kmem_cache_free+0x10d/0x4d0 [ 36.303807] rcu_core+0x8c8/0x2860 [ 36.304254] __do_softirq+0x1b7/0x7d4 [ 36.304729] [ 36.304944] Last potentially related work creation: [ 36.305561] kasan_save_stack+0x22/0x50 [ 36.306081] __kasan_record_aux_stack+0x8e/0xa0 [ 36.306671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.307324] remove_vma+0x139/0x170 [ 36.307793] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.308366] do_vmi_munmap+0x1f1/0x2b0 [ 36.308862] __vm_munmap+0x138/0x3a0 [ 36.309333] __x64_sys_munmap+0x59/0x80 [ 36.309850] do_syscall_64+0x3f/0x90 [ 36.310332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.311006] [ 36.311225] The buggy address belongs to the object at ffff8880145ad3a0 [ 36.311225] which belongs to the cache vm_area_struct of size 168 [ 36.312724] The buggy address is located 88 bytes inside of [ 36.312724] freed 168-byte region [ffff8880145ad3a0, ffff8880145ad448) [ 36.314180] [ 36.314400] The buggy address belongs to the physical page: [ 36.315085] page:0000000049728a3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ad [ 36.316194] memcg:ffff88800dcec501 [ 36.316647] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.317334] page_type: 0xffffffff() [ 36.317807] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.318766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcec501 [ 36.319722] page dumped because: kasan: bad access detected [ 36.320399] [ 36.320614] Memory state around the buggy address: [ 36.321228] ffff8880145ad280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.322102] ffff8880145ad300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.323010] >ffff8880145ad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.323887] ^ [ 36.324757] ffff8880145ad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.325653] ffff8880145ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.326540] ================================================================== [ 36.327586] Disabling lock debugging due to kernel taint [ 38.261307] BUG: Bad rss-counter state mm:0000000040a104ec type:MM_FILEPAGES val:33 [ 38.262280] BUG: Bad rss-counter state mm:0000000040a104ec type:MM_ANONPAGES val:22 [ 38.673463] BUG: Bad rss-counter state mm:0000000030391aa9 type:MM_FILEPAGES val:33 [ 38.674258] BUG: Bad rss-counter state mm:0000000030391aa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28188' (ECDSA) to the list of known hosts. 2023/06/21 05:44:08 fuzzer started 2023/06/21 05:44:08 dialing manager at localhost:36067 2023/06/21 05:44:08 checking machine... 2023/06/21 05:44:08 checking revisions... [ 39.401655] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:44:09 testing simple program... [ 39.446378] cgroup: Unknown subsys name 'net' [ 39.485398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801035fa88 RCX=0000000000000001 RDX=1ffff1100206bf51 RSI=ffffffff8451203d RDI=ffff88801035fa94 RBP=0000000000000008 RSP=ffff88801035f9a0 R8 =0000000000000001 R9 =ffff88801035fa00 R10=0000000000038001 R11=0000000000010484 R12=ffff88801035fa88 R13=0000000000000000 R14=ffff888010350000 R15=ffff88800d65d400 RIP=ffffffff813ad51f 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 00007f01cb8cd900 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=000055bc1ec00768 CR3=000000000c6d4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f066129fda4ff0c500000000000ae988 XMM05=488393e58c49d9d300000000001324d8 XMM06=4471b7e3452f191e0000000000131210 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe358da918 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=00007fed8ce07510000056378b6d4790 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