syzkaller login: [ 35.503868] BUG: Bad rss-counter state mm:000000000642dd75 type:MM_FILEPAGES val:33 [ 35.505300] BUG: Bad rss-counter state mm:000000000642dd75 type:MM_ANONPAGES val:22 [ 35.672973] ================================================================== [ 35.674055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.675050] Read of size 8 at addr ffff88800e137228 by task sshd/221 [ 35.676070] [ 35.676305] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.677246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.678311] Call Trace: [ 35.678660] [ 35.678965] dump_stack_lvl+0x91/0xf0 [ 35.679492] print_report+0xcc/0x620 [ 35.680016] ? __virt_addr_valid+0x102/0x340 [ 35.680615] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.681296] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.681994] kasan_report+0xbe/0xf0 [ 35.682584] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.683355] vma_interval_tree_remove+0xc75/0xec0 [ 35.684098] vma_prepare+0xc54/0x11a0 [ 35.684704] __split_vma+0x5af/0x950 [ 35.685332] ? __pfx___split_vma+0x10/0x10 [ 35.685968] ? find_held_lock+0x2c/0x110 [ 35.686546] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.687172] ? lock_is_held_type+0x9f/0x120 [ 35.687769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.688446] ? mtree_range_walk+0x632/0x900 [ 35.689058] ? mas_walk+0x5c7/0x7c0 [ 35.689601] do_vmi_munmap+0x1f1/0x2b0 [ 35.690146] mmap_region+0x1f9/0x2660 [ 35.690680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.691230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.691996] ? __pfx_lock_acquire+0x10/0x10 [ 35.692576] ? __pfx_mmap_region+0x10/0x10 [ 35.693153] ? security_mmap_addr+0x7d/0xa0 [ 35.693725] ? get_unmapped_area+0x1f5/0x3f0 [ 35.694315] do_mmap+0x854/0xf00 [ 35.694787] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.695317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.695924] ksys_mmap_pgoff+0x3af/0x500 [ 35.696477] do_syscall_64+0x3f/0x90 [ 35.696996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.697715] RIP: 0033:0x7fbd7097cd82 [ 35.698211] 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 [ 35.700518] RSP: 002b:00007fff377d5c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.701519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd7097cd82 [ 35.702456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd6fdb6000 [ 35.703397] RBP: 00007fbd6fdb6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.704324] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d03794b20 [ 35.705275] R13: 00007fff377d5c30 R14: 00007fff377d5c60 R15: 00007fff377d5fc0 [ 35.706235] [ 35.706560] [ 35.706801] Allocated by task 214: [ 35.707279] kasan_save_stack+0x22/0x50 [ 35.707837] kasan_set_track+0x25/0x30 [ 35.708382] __kasan_slab_alloc+0x59/0x70 [ 35.708959] kmem_cache_alloc+0x16b/0x370 [ 35.709548] vm_area_dup+0x20/0x160 [ 35.710039] __split_vma+0x170/0x950 [ 35.710557] split_vma+0xc6/0x110 [ 35.711038] mprotect_fixup+0x8d2/0xb30 [ 35.711593] do_mprotect_pkey+0x87e/0xd40 [ 35.712172] __x64_sys_mprotect+0x78/0xc0 [ 35.712747] do_syscall_64+0x3f/0x90 [ 35.713281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.713991] [ 35.714228] Freed by task 214: [ 35.714662] kasan_save_stack+0x22/0x50 [ 35.715225] kasan_set_track+0x25/0x30 [ 35.715774] kasan_save_free_info+0x2b/0x50 [ 35.716366] __kasan_slab_free+0x10a/0x190 [ 35.716961] kmem_cache_free+0x10d/0x4d0 [ 35.717533] rcu_core+0x8c8/0x2860 [ 35.718016] __do_softirq+0x1b7/0x7d4 [ 35.718541] [ 35.718780] Last potentially related work creation: [ 35.719428] kasan_save_stack+0x22/0x50 [ 35.719976] __kasan_record_aux_stack+0x8e/0xa0 [ 35.720663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.721386] remove_vma+0x139/0x170 [ 35.721885] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.722505] do_vmi_munmap+0x1f1/0x2b0 [ 35.723044] __vm_munmap+0x138/0x3a0 [ 35.723556] __x64_sys_munmap+0x59/0x80 [ 35.724103] do_syscall_64+0x3f/0x90 [ 35.724625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.725342] [ 35.725578] The buggy address belongs to the object at ffff88800e1371d0 [ 35.725578] which belongs to the cache vm_area_struct of size 168 [ 35.727205] The buggy address is located 88 bytes inside of [ 35.727205] freed 168-byte region [ffff88800e1371d0, ffff88800e137278) [ 35.728740] [ 35.728981] The buggy address belongs to the physical page: [ 35.729710] page:00000000af8597ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe137 [ 35.730911] memcg:ffff88800e229701 [ 35.731383] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.732097] page_type: 0xffffffff() [ 35.732582] raw: 0100000000000200 ffff88800879fc80 ffffea0000385240 dead000000000002 [ 35.733583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e229701 [ 35.734563] page dumped because: kasan: bad access detected [ 35.735267] [ 35.735497] Memory state around the buggy address: [ 35.736117] ffff88800e137100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.737036] ffff88800e137180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.737968] >ffff88800e137200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.738918] ^ [ 35.739533] ffff88800e137280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.740485] ffff88800e137300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.741450] ================================================================== [ 35.742502] Disabling lock debugging due to kernel taint [ 38.118710] BUG: Bad rss-counter state mm:00000000ab1f0e92 type:MM_FILEPAGES val:33 [ 38.119894] BUG: Bad rss-counter state mm:00000000ab1f0e92 type:MM_ANONPAGES val:22 [ 38.668553] BUG: Bad rss-counter state mm:00000000986d075d type:MM_FILEPAGES val:33 [ 38.669768] BUG: Bad rss-counter state mm:00000000986d075d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9374' (ECDSA) to the list of known hosts. 2023/06/19 22:53:37 fuzzer started 2023/06/19 22:53:37 dialing manager at localhost:44161 2023/06/19 22:53:37 checking machine... 2023/06/19 22:53:37 checking revisions... [ 39.335740] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:53:37 testing simple program... [ 39.390260] cgroup: Unknown subsys name 'net' [ 39.433149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:32 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff11001ecef6d RSP=ffff88800f677b60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000287 R13=ffffea0000670400 R14=ffffffff81893972 R15=ffff88800f677e9e RIP=ffffffff812e004a RFL=00000046 [---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 00007f3cec3fb900 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=00007f3cec9b0650 CR3=0000000018d3e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd0e27cf08 CR3=000000000d87c000 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=2036333a33353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000