syzkaller login: [ 30.624940] BUG: Bad rss-counter state mm:00000000960632e9 type:MM_FILEPAGES val:33 [ 30.626004] BUG: Bad rss-counter state mm:00000000960632e9 type:MM_ANONPAGES val:22 [ 30.806330] ================================================================== [ 30.807323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.808381] Read of size 8 at addr ffff88801033d228 by task sshd/221 [ 30.809326] [ 30.809566] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.810518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.811600] Call Trace: [ 30.811967] [ 30.812278] dump_stack_lvl+0x91/0xf0 [ 30.812818] print_report+0xcc/0x620 [ 30.813346] ? __virt_addr_valid+0x102/0x340 [ 30.813952] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815316] kasan_report+0xbe/0xf0 [ 30.815861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.816547] vma_interval_tree_remove+0xc75/0xec0 [ 30.817215] vma_prepare+0xc54/0x11a0 [ 30.817742] __split_vma+0x5af/0x950 [ 30.818263] ? __pfx___split_vma+0x10/0x10 [ 30.818848] ? find_held_lock+0x2c/0x110 [ 30.819424] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.820068] ? lock_is_held_type+0x9f/0x120 [ 30.820667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.821338] ? mtree_range_walk+0x632/0x900 [ 30.821955] ? mas_walk+0x5c7/0x7c0 [ 30.822480] do_vmi_munmap+0x1f1/0x2b0 [ 30.823026] mmap_region+0x1f9/0x2660 [ 30.823564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.824127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.824872] ? __pfx_lock_acquire+0x10/0x10 [ 30.825437] ? __pfx_mmap_region+0x10/0x10 [ 30.825991] ? security_mmap_addr+0x7d/0xa0 [ 30.826550] ? get_unmapped_area+0x1f5/0x3f0 [ 30.827125] do_mmap+0x854/0xf00 [ 30.827589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.828118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.828709] ksys_mmap_pgoff+0x3af/0x500 [ 30.829248] do_syscall_64+0x3f/0x90 [ 30.829750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830433] RIP: 0033:0x7fbc3dc5bd82 [ 30.830917] 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 [ 30.833179] RSP: 002b:00007fff2afed5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.834134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc3dc5bd82 [ 30.835029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc3d095000 [ 30.835925] RBP: 00007fbc3d095000 R08: 0000000000000009 R09: 0000000000001000 [ 30.836825] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f35db1980 [ 30.837717] R13: 00007fff2afed600 R14: 00007fff2afed630 R15: 00007fff2afed990 [ 30.838630] [ 30.838941] [ 30.839169] Allocated by task 214: [ 30.839618] kasan_save_stack+0x22/0x50 [ 30.840172] kasan_set_track+0x25/0x30 [ 30.840694] __kasan_slab_alloc+0x59/0x70 [ 30.841256] kmem_cache_alloc+0x16b/0x370 [ 30.841800] vm_area_dup+0x20/0x160 [ 30.842279] __split_vma+0x170/0x950 [ 30.842779] split_vma+0xc6/0x110 [ 30.843247] mprotect_fixup+0x8d2/0xb30 [ 30.843785] do_mprotect_pkey+0x87e/0xd40 [ 30.844340] __x64_sys_mprotect+0x78/0xc0 [ 30.844892] do_syscall_64+0x3f/0x90 [ 30.845389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846073] [ 30.846302] Freed by task 214: [ 30.846716] kasan_save_stack+0x22/0x50 [ 30.847244] kasan_set_track+0x25/0x30 [ 30.847771] kasan_save_free_info+0x2b/0x50 [ 30.848327] __kasan_slab_free+0x10a/0x190 [ 30.848894] kmem_cache_free+0x10d/0x4d0 [ 30.849438] rcu_core+0x8c8/0x2860 [ 30.849912] __do_softirq+0x1b7/0x7d4 [ 30.850417] [ 30.850645] Last potentially related work creation: [ 30.851262] kasan_save_stack+0x22/0x50 [ 30.851812] __kasan_record_aux_stack+0x8e/0xa0 [ 30.852427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.853107] remove_vma+0x139/0x170 [ 30.853587] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.854174] do_vmi_munmap+0x1f1/0x2b0 [ 30.854692] __vm_munmap+0x138/0x3a0 [ 30.855189] __x64_sys_munmap+0x59/0x80 [ 30.855721] do_syscall_64+0x3f/0x90 [ 30.856225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856913] [ 30.857141] The buggy address belongs to the object at ffff88801033d1d0 [ 30.857141] which belongs to the cache vm_area_struct of size 168 [ 30.858693] The buggy address is located 88 bytes inside of [ 30.858693] freed 168-byte region [ffff88801033d1d0, ffff88801033d278) [ 30.860190] [ 30.860422] The buggy address belongs to the physical page: [ 30.861110] page:00000000dc411fa6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033d [ 30.862259] memcg:ffff888010372801 [ 30.862710] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.863399] page_type: 0xffffffff() [ 30.863888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.864854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010372801 [ 30.865820] page dumped because: kasan: bad access detected [ 30.866536] [ 30.866768] Memory state around the buggy address: [ 30.867389] ffff88801033d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.868313] ffff88801033d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.869214] >ffff88801033d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.870119] ^ [ 30.870705] ffff88801033d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.871612] ffff88801033d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.872527] ================================================================== [ 30.873559] Disabling lock debugging due to kernel taint [ 32.825935] BUG: Bad rss-counter state mm:000000002daff758 type:MM_FILEPAGES val:33 [ 32.826914] BUG: Bad rss-counter state mm:000000002daff758 type:MM_ANONPAGES val:22 [ 33.364150] BUG: Bad rss-counter state mm:00000000491cf32c type:MM_FILEPAGES val:33 [ 33.365172] BUG: Bad rss-counter state mm:00000000491cf32c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54780' (ECDSA) to the list of known hosts. 2023/06/20 22:23:37 fuzzer started 2023/06/20 22:23:37 dialing manager at localhost:36067 2023/06/20 22:23:37 checking machine... 2023/06/20 22:23:37 checking revisions... [ 34.011575] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:23:37 testing simple program... [ 34.066226] cgroup: Unknown subsys name 'net' [ 34.125678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00007fff6ad47018 RCX=ffffffff864bbb54 RDX=1ffff110033a0f1c RSI=0000000000000000 RDI=ffff888019d078e0 RBP=0000557734b50350 RSP=ffff888019d07868 R8 =ffffffff864bbb58 R9 =ffff888019d07918 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888019d07f58 R13=ffff888019d07920 R14=ffff888019d07f58 R15=ffff888019d078d8 RIP=ffffffff81131c83 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 00007fc47fafb900 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=00007fc4800b30b0 CR3=000000001ccac000 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=2036333a33323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33323a3232203032 XMM08=3d656e696c646d632022656369767265 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=00007f4b99592990 CR3=000000000c758000 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=2ac8675f04be3780ee45a04aca76aa1b XMM02=2c67c8bc2e329bc3000000000011a080 XMM03=fb795ef6d657705600000000001215c0 XMM04=e8653d20fa347d9200000000000ae988 XMM05=e4cb8bb95a7664b60000000000131428 XMM06=b6a4862ca751b7a40000000000130290 XMM07=e042d86d42eb936e0000000000121840 XMM08=7d357d793ca3adb0000000000011a0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000