syzkaller login: [ 41.502266] BUG: Bad rss-counter state mm:00000000889fbf19 type:MM_FILEPAGES val:33 [ 41.502963] BUG: Bad rss-counter state mm:00000000889fbf19 type:MM_ANONPAGES val:22 [ 41.688788] ================================================================== [ 41.690369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.696201] Read of size 8 at addr ffff88800c66db38 by task sshd/228 [ 41.697642] [ 41.698011] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.699674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.701588] Call Trace: [ 41.702164] [ 41.702673] dump_stack_lvl+0x91/0xf0 [ 41.703559] print_report+0xcc/0x620 [ 41.704407] ? __virt_addr_valid+0x102/0x340 [ 41.705368] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.706453] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.707527] kasan_report+0xbe/0xf0 [ 41.708386] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.709526] vma_interval_tree_remove+0xc75/0xec0 [ 41.710634] vma_prepare+0xc54/0x11a0 [ 41.711508] __split_vma+0x5af/0x950 [ 41.712384] ? __pfx___split_vma+0x10/0x10 [ 41.713349] ? find_held_lock+0x2c/0x110 [ 41.714885] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.715944] ? lock_is_held_type+0x9f/0x120 [ 41.716946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.718077] ? mtree_range_walk+0x632/0x900 [ 41.719071] ? mas_walk+0x5c7/0x7c0 [ 41.720057] do_vmi_munmap+0x1f1/0x2b0 [ 41.720964] mmap_region+0x1f9/0x2660 [ 41.721827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.722735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.724068] ? __pfx_lock_acquire+0x10/0x10 [ 41.725052] ? __pfx_mmap_region+0x10/0x10 [ 41.726008] ? security_mmap_addr+0x7d/0xa0 [ 41.726993] ? get_unmapped_area+0x1f5/0x3f0 [ 41.728021] do_mmap+0x854/0xf00 [ 41.728797] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.729705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.730739] ksys_mmap_pgoff+0x3af/0x500 [ 41.731709] do_syscall_64+0x3f/0x90 [ 41.732584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.733766] RIP: 0033:0x7f011c863d82 [ 41.734633] 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 [ 41.738961] RSP: 002b:00007ffdc9b30118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.740881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f011c863d82 [ 41.742832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f011bc9d000 [ 41.744631] RBP: 00007f011bc9d000 R08: 0000000000000009 R09: 0000000000001000 [ 41.746116] R10: 0000000000000812 R11: 0000000000000206 R12: 000056029d3d1d90 [ 41.747720] R13: 00007ffdc9b30130 R14: 00007ffdc9b30160 R15: 00007ffdc9b304c0 [ 41.749422] [ 41.749970] [ 41.750354] Allocated by task 219: [ 41.751164] kasan_save_stack+0x22/0x50 [ 41.756160] kasan_set_track+0x25/0x30 [ 41.757077] __kasan_slab_alloc+0x59/0x70 [ 41.758043] kmem_cache_alloc+0x16b/0x370 [ 41.759012] vm_area_dup+0x20/0x160 [ 41.759892] __split_vma+0x170/0x950 [ 41.760768] split_vma+0xc6/0x110 [ 41.761572] mprotect_fixup+0x8d2/0xb30 [ 41.762510] do_mprotect_pkey+0x87e/0xd40 [ 41.763494] __x64_sys_mprotect+0x78/0xc0 [ 41.764462] do_syscall_64+0x3f/0x90 [ 41.765323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.766529] [ 41.766908] Freed by task 19: [ 41.767658] kasan_save_stack+0x22/0x50 [ 41.776630] kasan_set_track+0x25/0x30 [ 41.777563] kasan_save_free_info+0x2b/0x50 [ 41.778573] __kasan_slab_free+0x10a/0x190 [ 41.779578] kmem_cache_free+0x10d/0x4d0 [ 41.780549] rcu_core+0x8c8/0x2860 [ 41.781389] __do_softirq+0x1b7/0x7d4 [ 41.782302] [ 41.782699] Last potentially related work creation: [ 41.783892] kasan_save_stack+0x22/0x50 [ 41.784828] __kasan_record_aux_stack+0x8e/0xa0 [ 41.785901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.787123] remove_vma+0x139/0x170 [ 41.787944] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.789003] do_vmi_munmap+0x1f1/0x2b0 [ 41.789922] __vm_munmap+0x138/0x3a0 [ 41.790813] __x64_sys_munmap+0x59/0x80 [ 41.791768] do_syscall_64+0x3f/0x90 [ 41.792663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.793898] [ 41.794289] The buggy address belongs to the object at ffff88800c66dae0 [ 41.794289] which belongs to the cache vm_area_struct of size 168 [ 41.797265] The buggy address is located 88 bytes inside of [ 41.797265] freed 168-byte region [ffff88800c66dae0, ffff88800c66db88) [ 41.800099] [ 41.800489] The buggy address belongs to the physical page: [ 41.801787] page:00000000effb311e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66d [ 41.803930] memcg:ffff88800e570e01 [ 41.804765] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.806021] page_type: 0xffffffff() [ 41.806872] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.808744] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e570e01 [ 41.810575] page dumped because: kasan: bad access detected [ 41.811912] [ 41.812302] Memory state around the buggy address: [ 41.813433] ffff88800c66da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.815130] ffff88800c66da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 41.816838] >ffff88800c66db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.818554] ^ [ 41.819769] ffff88800c66db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.821425] ffff88800c66dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.823132] ================================================================== [ 41.825015] Disabling lock debugging due to kernel taint [ 43.871869] BUG: Bad rss-counter state mm:00000000cf620eb8 type:MM_FILEPAGES val:33 [ 43.873008] BUG: Bad rss-counter state mm:00000000cf620eb8 type:MM_ANONPAGES val:22 [ 44.322548] BUG: Bad rss-counter state mm:0000000087aaf10a type:MM_FILEPAGES val:33 [ 44.323234] BUG: Bad rss-counter state mm:0000000087aaf10a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10466' (ECDSA) to the list of known hosts. 2023/06/20 10:06:38 fuzzer started 2023/06/20 10:06:39 dialing manager at localhost:44161 2023/06/20 10:06:39 checking machine... 2023/06/20 10:06:39 checking revisions... [ 45.347725] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:06:39 testing simple program... [ 45.401273] cgroup: Unknown subsys name 'net' [ 45.512801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801676d1c0 RSI=ffffffff8170b6c6 RDI=0000000000000007 RBP=00007f55475f6000 RSP=ffff88800f1ef638 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=00007f55475f6000 R14=ffff88800cc9afa8 R15=dffffc0000000000 RIP=ffffffff814c081b 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 0000000000000000 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=00007f5547647790 CR3=000000000cbbc000 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=0000000000000018fffffffe7ffbfeff XMM01=cc71536d233b5d900000559700000030 XMM02=cc71536d233b5d903d74f0e29321726f XMM03=00000000000000023e74f0e29321726f XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=4c28f4da551ca1620000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88800cdbfa10 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff110019b7f43 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 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=00007fb047009269 CR3=000000000ea9c000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f732e6c736e62696c2f756e672d78 XMM02=00322e6f732e6c736e62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000