syzkaller login: [ 31.802804] BUG: Bad rss-counter state mm:000000007acad0ef type:MM_FILEPAGES val:33 [ 31.804688] BUG: Bad rss-counter state mm:000000007acad0ef type:MM_ANONPAGES val:22 [ 31.974912] ================================================================== [ 31.975901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.976913] Read of size 8 at addr ffff8880163643f8 by task sshd/219 [ 31.977857] [ 31.978095] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.979025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.980059] Call Trace: [ 31.980404] [ 31.980711] dump_stack_lvl+0x91/0xf0 [ 31.981261] print_report+0xcc/0x620 [ 31.981788] ? __virt_addr_valid+0x102/0x340 [ 31.982421] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.983088] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.983747] kasan_report+0xbe/0xf0 [ 31.984249] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.984955] vma_interval_tree_remove+0xc75/0xec0 [ 31.985609] vma_prepare+0xc54/0x11a0 [ 31.986138] __split_vma+0x5af/0x950 [ 31.986654] ? __pfx___split_vma+0x10/0x10 [ 31.987226] ? find_held_lock+0x2c/0x110 [ 31.987800] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.988409] ? lock_is_held_type+0x9f/0x120 [ 31.988991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.989671] ? mtree_range_walk+0x632/0x900 [ 31.990263] ? mas_walk+0x5c7/0x7c0 [ 31.990775] do_vmi_munmap+0x1f1/0x2b0 [ 31.991311] mmap_region+0x1f9/0x2660 [ 31.991843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.992379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.993182] ? __pfx_lock_acquire+0x10/0x10 [ 31.993759] ? __pfx_mmap_region+0x10/0x10 [ 31.994342] ? security_mmap_addr+0x7d/0xa0 [ 31.994924] ? get_unmapped_area+0x1f5/0x3f0 [ 31.995520] do_mmap+0x854/0xf00 [ 31.995998] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.996534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.997172] ksys_mmap_pgoff+0x3af/0x500 [ 31.997727] do_syscall_64+0x3f/0x90 [ 31.998252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.998954] RIP: 0033:0x7fd17961ed82 [ 31.999462] 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 [ 32.001813] RSP: 002b:00007ffdf4cc3e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.002805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd17961ed82 [ 32.003731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd178a58000 [ 32.004658] RBP: 00007fd178a58000 R08: 0000000000000009 R09: 0000000000001000 [ 32.005601] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a763983b20 [ 32.006507] R13: 00007ffdf4cc3e60 R14: 00007ffdf4cc3e90 R15: 00007ffdf4cc41f0 [ 32.007444] [ 32.007761] [ 32.007995] Allocated by task 212: [ 32.008457] kasan_save_stack+0x22/0x50 [ 32.009013] kasan_set_track+0x25/0x30 [ 32.009554] __kasan_slab_alloc+0x59/0x70 [ 32.010125] kmem_cache_alloc+0x16b/0x370 [ 32.010693] vm_area_dup+0x20/0x160 [ 32.011195] __split_vma+0x170/0x950 [ 32.011703] split_vma+0xc6/0x110 [ 32.012190] mprotect_fixup+0x8d2/0xb30 [ 32.012743] do_mprotect_pkey+0x87e/0xd40 [ 32.013320] __x64_sys_mprotect+0x78/0xc0 [ 32.013881] do_syscall_64+0x3f/0x90 [ 32.014387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.015074] [ 32.015302] Freed by task 212: [ 32.015729] kasan_save_stack+0x22/0x50 [ 32.016281] kasan_set_track+0x25/0x30 [ 32.016813] kasan_save_free_info+0x2b/0x50 [ 32.017392] __kasan_slab_free+0x10a/0x190 [ 32.017998] kmem_cache_free+0x10d/0x4d0 [ 32.018563] rcu_core+0x8c8/0x2860 [ 32.019043] __do_softirq+0x1b7/0x7d4 [ 32.019588] [ 32.019826] Last potentially related work creation: [ 32.020465] kasan_save_stack+0x22/0x50 [ 32.021020] __kasan_record_aux_stack+0x8e/0xa0 [ 32.021669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.022382] remove_vma+0x139/0x170 [ 32.022861] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.023456] do_vmi_munmap+0x1f1/0x2b0 [ 32.023992] __vm_munmap+0x138/0x3a0 [ 32.024503] __x64_sys_munmap+0x59/0x80 [ 32.025065] do_syscall_64+0x3f/0x90 [ 32.025579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.026282] [ 32.026520] The buggy address belongs to the object at ffff8880163643a0 [ 32.026520] which belongs to the cache vm_area_struct of size 168 [ 32.028141] The buggy address is located 88 bytes inside of [ 32.028141] freed 168-byte region [ffff8880163643a0, ffff888016364448) [ 32.029646] [ 32.029875] The buggy address belongs to the physical page: [ 32.030574] page:0000000014ab07f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16364 [ 32.031742] memcg:ffff888014579e01 [ 32.032193] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.032903] page_type: 0xffffffff() [ 32.033414] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.034401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014579e01 [ 32.035396] page dumped because: kasan: bad access detected [ 32.036120] [ 32.036349] Memory state around the buggy address: [ 32.036976] ffff888016364280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.037906] ffff888016364300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.038830] >ffff888016364380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.039750] ^ [ 32.040638] ffff888016364400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.041545] ffff888016364480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.042434] ================================================================== [ 32.043606] Disabling lock debugging due to kernel taint [ 34.006145] BUG: Bad rss-counter state mm:000000002613e85b type:MM_FILEPAGES val:33 [ 34.007194] BUG: Bad rss-counter state mm:000000002613e85b type:MM_ANONPAGES val:22 [ 34.565208] BUG: Bad rss-counter state mm:00000000ded0615d type:MM_FILEPAGES val:33 [ 34.566369] BUG: Bad rss-counter state mm:00000000ded0615d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49798' (ECDSA) to the list of known hosts. 2023/06/21 05:37:52 fuzzer started 2023/06/21 05:37:52 dialing manager at localhost:36067 2023/06/21 05:37:52 checking machine... 2023/06/21 05:37:52 checking revisions... [ 35.217079] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:37:52 testing simple program... [ 35.268423] cgroup: Unknown subsys name 'net' [ 35.306683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:37:52 Registers: info registers vcpu 0 RAX=ffffffff8363e261 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028aded6 RSI=ffffffff8363e261 RDI=ffff88801456f720 RBP=ffff88801456f6f0 RSP=ffff88801456f650 R8 =0000000000000001 R9 =ffff88801456f698 R10=0000000000038001 R11=000000000008aa79 R12=ffff88801456f720 R13=0000000000000000 R14=ffff8880162c51c0 R15=0000000000092cc0 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007fa3dbe19900 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=00007ffd98dab000 CR3=000000001609a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f686cb8d270 CR3=000000000cc5c000 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=ca291c95bb4a1889c94d7c6cb8dfef57 XMM02=ec2efd57dc4c00df000000000011a608 XMM03=38fbd0a243c647a4000000000011a6d8 XMM04=b342ba2a6839404f00000000000ae988 XMM05=dfcdbad4f1609c370000000000131958 XMM06=ef76df7e74c7a7a700000000001307c0 XMM07=e042d86d42eb936e0000000000121df0 XMM08=38fbd0a243c647a4000000000011a6d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000