syzkaller login: [ 30.804346] sshd (213) used greatest stack depth: 24128 bytes left [ 30.806164] BUG: Bad rss-counter state mm:00000000390503a3 type:MM_FILEPAGES val:33 [ 30.808146] BUG: Bad rss-counter state mm:00000000390503a3 type:MM_ANONPAGES val:22 [ 30.923331] ================================================================== [ 30.924431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.925549] Read of size 8 at addr ffff88800d631b38 by task sshd/220 [ 30.926459] [ 30.926914] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.927946] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.929194] Call Trace: [ 30.929587] [ 30.929928] dump_stack_lvl+0x91/0xf0 [ 30.930534] print_report+0xcc/0x620 [ 30.931134] ? __virt_addr_valid+0x102/0x340 [ 30.931815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.932617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.933397] kasan_report+0xbe/0xf0 [ 30.934002] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934805] vma_interval_tree_remove+0xc75/0xec0 [ 30.935578] vma_prepare+0xc54/0x11a0 [ 30.936195] __split_vma+0x5af/0x950 [ 30.936811] ? __pfx___split_vma+0x10/0x10 [ 30.937492] ? find_held_lock+0x2c/0x110 [ 30.938156] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.938879] ? lock_is_held_type+0x9f/0x120 [ 30.939585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.940392] ? mtree_range_walk+0x632/0x900 [ 30.941084] ? mas_walk+0x5c7/0x7c0 [ 30.941593] do_vmi_munmap+0x1f1/0x2b0 [ 30.942123] mmap_region+0x1f9/0x2660 [ 30.942637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.943184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.943947] ? __pfx_lock_acquire+0x10/0x10 [ 30.944496] ? __pfx_mmap_region+0x10/0x10 [ 30.945038] ? security_mmap_addr+0x7d/0xa0 [ 30.945620] ? get_unmapped_area+0x1f5/0x3f0 [ 30.946209] do_mmap+0x854/0xf00 [ 30.946679] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.947223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.947841] ksys_mmap_pgoff+0x3af/0x500 [ 30.948409] do_syscall_64+0x3f/0x90 [ 30.948920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949624] RIP: 0033:0x7f9df2b6dd82 [ 30.950121] 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 [ 30.952444] RSP: 002b:00007fff7c415f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.953440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9df2b6dd82 [ 30.954372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9df1fa7000 [ 30.955305] RBP: 00007f9df1fa7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.956215] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffc9becb20 [ 30.957080] R13: 00007fff7c415f30 R14: 00007fff7c415f60 R15: 00007fff7c4162c0 [ 30.958037] [ 30.958365] [ 30.958604] Allocated by task 213: [ 30.959083] kasan_save_stack+0x22/0x50 [ 30.959643] kasan_set_track+0x25/0x30 [ 30.960188] __kasan_slab_alloc+0x59/0x70 [ 30.960789] kmem_cache_alloc+0x16b/0x370 [ 30.961370] vm_area_dup+0x20/0x160 [ 30.961881] __split_vma+0x170/0x950 [ 30.962407] split_vma+0xc6/0x110 [ 30.962900] mprotect_fixup+0x8d2/0xb30 [ 30.963474] do_mprotect_pkey+0x87e/0xd40 [ 30.964062] __x64_sys_mprotect+0x78/0xc0 [ 30.964586] do_syscall_64+0x3f/0x90 [ 30.965073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965802] [ 30.966046] Freed by task 213: [ 30.966490] kasan_save_stack+0x22/0x50 [ 30.967057] kasan_set_track+0x25/0x30 [ 30.967679] kasan_save_free_info+0x2b/0x50 [ 30.968308] __kasan_slab_free+0x10a/0x190 [ 30.968917] kmem_cache_free+0x10d/0x4d0 [ 30.969493] rcu_core+0x8c8/0x2860 [ 30.969993] __do_softirq+0x1b7/0x7d4 [ 30.970537] [ 30.970782] Last potentially related work creation: [ 30.971453] kasan_save_stack+0x22/0x50 [ 30.972028] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973445] remove_vma+0x139/0x170 [ 30.973961] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974608] do_vmi_munmap+0x1f1/0x2b0 [ 30.975165] __vm_munmap+0x138/0x3a0 [ 30.975701] __x64_sys_munmap+0x59/0x80 [ 30.976270] do_syscall_64+0x3f/0x90 [ 30.976839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977575] [ 30.977821] The buggy address belongs to the object at ffff88800d631ae0 [ 30.977821] which belongs to the cache vm_area_struct of size 168 [ 30.979346] The buggy address is located 88 bytes inside of [ 30.979346] freed 168-byte region [ffff88800d631ae0, ffff88800d631b88) [ 30.980828] [ 30.981052] The buggy address belongs to the physical page: [ 30.981787] page:000000008d5b5150 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd631 [ 30.982886] memcg:ffff8880168f8401 [ 30.983361] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.984093] page_type: 0xffffffff() [ 30.984621] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f73c0 dead000000000004 [ 30.985650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168f8401 [ 30.986677] page dumped because: kasan: bad access detected [ 30.987442] [ 30.987686] Memory state around the buggy address: [ 30.988361] ffff88800d631a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.989344] ffff88800d631a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.990288] >ffff88800d631b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.991144] ^ [ 30.991853] ffff88800d631b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.992850] ffff88800d631c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.993835] ================================================================== [ 30.994780] Disabling lock debugging due to kernel taint [ 32.957115] BUG: Bad rss-counter state mm:00000000b378dd7c type:MM_FILEPAGES val:33 [ 32.958192] BUG: Bad rss-counter state mm:00000000b378dd7c type:MM_ANONPAGES val:22 [ 33.426373] BUG: Bad rss-counter state mm:00000000e462b285 type:MM_FILEPAGES val:33 [ 33.427366] BUG: Bad rss-counter state mm:00000000e462b285 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18672' (ECDSA) to the list of known hosts. 2023/06/20 22:19:15 fuzzer started 2023/06/20 22:19:15 dialing manager at localhost:36067 2023/06/20 22:19:15 checking machine... 2023/06/20 22:19:15 checking revisions... [ 34.162543] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:19:15 testing simple program... [ 34.214454] cgroup: Unknown subsys name 'net' [ 34.251033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:19:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002cb9f8e RSI=ffffffff81f31ad3 RDI=ffff8880165cfc70 RBP=0000000000000000 RSP=ffff8880165cfa78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880165cfc68 R13=dffffc0000000000 R14=ffff88800ff51008 R15=dffffc0000000000 RIP=ffffffff81f31b08 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 00007f280c207900 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=00007f280c7be618 CR3=000000000cbf6000 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=00007fc4a716ed20 CR3=000000000c4e6000 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=8dd1b56874d5379406485d876844d3a3 XMM02=000000000011c8f0ec2efd57dc4c00df XMM03=000000000012326801a662ad9d373361 XMM04=c645e20c8e2f4a6200000000000ae988 XMM05=19e9129bd510f23500000000001331f0 XMM06=8770c8f82db3d7290000000000132058 XMM07=e042d86d42eb936e00000000001234e8 XMM08=01a662ad9d373361000000000011c950 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000