syzkaller login: [ 30.118138] BUG: Bad rss-counter state mm:0000000084158f63 type:MM_FILEPAGES val:33 [ 30.120198] BUG: Bad rss-counter state mm:0000000084158f63 type:MM_ANONPAGES val:22 [ 30.295997] ================================================================== [ 30.297077] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.298198] Read of size 8 at addr ffff88801a1ef140 by task sshd/219 [ 30.299298] [ 30.299562] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.300641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.301636] Call Trace: [ 30.301955] [ 30.302243] dump_stack_lvl+0x91/0xf0 [ 30.302745] print_report+0xcc/0x620 [ 30.303232] ? __virt_addr_valid+0x102/0x340 [ 30.303784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304417] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305042] kasan_report+0xbe/0xf0 [ 30.305522] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.306147] vma_interval_tree_remove+0xc75/0xec0 [ 30.306760] vma_prepare+0xc54/0x11a0 [ 30.307254] __split_vma+0x5af/0x950 [ 30.307744] ? __pfx___split_vma+0x10/0x10 [ 30.308314] ? find_held_lock+0x2c/0x110 [ 30.308850] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.309429] ? lock_is_held_type+0x9f/0x120 [ 30.309975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.310594] ? mtree_range_walk+0x632/0x900 [ 30.311159] ? mas_walk+0x5c7/0x7c0 [ 30.311636] do_vmi_munmap+0x1f1/0x2b0 [ 30.312144] mmap_region+0x1f9/0x2660 [ 30.312648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.313160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.313873] ? __pfx_lock_acquire+0x10/0x10 [ 30.314415] ? __pfx_mmap_region+0x10/0x10 [ 30.314946] ? security_mmap_addr+0x7d/0xa0 [ 30.315485] ? get_unmapped_area+0x1f5/0x3f0 [ 30.316049] do_mmap+0x854/0xf00 [ 30.316493] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.316994] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.317559] ksys_mmap_pgoff+0x3af/0x500 [ 30.318079] do_syscall_64+0x3f/0x90 [ 30.318558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.319213] RIP: 0033:0x7f78b082dd82 [ 30.319680] 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 [ 30.321874] RSP: 002b:00007ffc54f103f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.322785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78b082dd82 [ 30.323641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78afc67000 [ 30.324517] RBP: 00007f78afc67000 R08: 0000000000000009 R09: 0000000000001000 [ 30.325383] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4e64feec0 [ 30.326241] R13: 00007ffc54f10410 R14: 00007ffc54f10440 R15: 00007ffc54f107a0 [ 30.327107] [ 30.327403] [ 30.327625] Allocated by task 212: [ 30.328070] kasan_save_stack+0x22/0x50 [ 30.328579] kasan_set_track+0x25/0x30 [ 30.329078] __kasan_slab_alloc+0x59/0x70 [ 30.329609] kmem_cache_alloc+0x16b/0x370 [ 30.330135] vm_area_dup+0x20/0x160 [ 30.330596] __split_vma+0x170/0x950 [ 30.331073] split_vma+0xc6/0x110 [ 30.331520] mprotect_fixup+0x8d2/0xb30 [ 30.332040] do_mprotect_pkey+0x87e/0xd40 [ 30.332566] __x64_sys_mprotect+0x78/0xc0 [ 30.333092] do_syscall_64+0x3f/0x90 [ 30.333578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.334234] [ 30.334454] Freed by task 212: [ 30.334849] kasan_save_stack+0x22/0x50 [ 30.335355] kasan_set_track+0x25/0x30 [ 30.335850] kasan_save_free_info+0x2b/0x50 [ 30.336400] __kasan_slab_free+0x10a/0x190 [ 30.336941] kmem_cache_free+0x10d/0x4d0 [ 30.337461] rcu_core+0x8c8/0x2860 [ 30.337908] __do_softirq+0x1b7/0x7d4 [ 30.338396] [ 30.338618] Last potentially related work creation: [ 30.339245] kasan_save_stack+0x22/0x50 [ 30.340002] __kasan_record_aux_stack+0x8e/0xa0 [ 30.340777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.341629] remove_vma+0x139/0x170 [ 30.342230] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.342969] do_vmi_munmap+0x1f1/0x2b0 [ 30.343592] __vm_munmap+0x138/0x3a0 [ 30.344218] __x64_sys_munmap+0x59/0x80 [ 30.344867] do_syscall_64+0x3f/0x90 [ 30.345499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.346345] [ 30.346627] The buggy address belongs to the object at ffff88801a1ef0e8 [ 30.346627] which belongs to the cache vm_area_struct of size 168 [ 30.348590] The buggy address is located 88 bytes inside of [ 30.348590] freed 168-byte region [ffff88801a1ef0e8, ffff88801a1ef190) [ 30.350452] [ 30.350737] The buggy address belongs to the physical page: [ 30.351612] page:00000000b7df358a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ef [ 30.353099] memcg:ffff888019c21001 [ 30.353668] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.354517] page_type: 0xffffffff() [ 30.355107] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.356329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c21001 [ 30.357483] page dumped because: kasan: bad access detected [ 30.358306] [ 30.358572] Memory state around the buggy address: [ 30.359291] ffff88801a1ef000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.360404] ffff88801a1ef080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.361492] >ffff88801a1ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.362599] ^ [ 30.363449] ffff88801a1ef180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.364479] ffff88801a1ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.365350] ================================================================== [ 30.366365] Disabling lock debugging due to kernel taint [ 33.223324] BUG: Bad rss-counter state mm:000000005bec3870 type:MM_FILEPAGES val:33 [ 33.224435] BUG: Bad rss-counter state mm:000000005bec3870 type:MM_ANONPAGES val:22 [ 33.778709] BUG: Bad rss-counter state mm:00000000eecfd632 type:MM_FILEPAGES val:33 [ 33.779767] BUG: Bad rss-counter state mm:00000000eecfd632 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34673' (ECDSA) to the list of known hosts. 2023/06/21 01:47:11 fuzzer started 2023/06/21 01:47:11 dialing manager at localhost:36067 2023/06/21 01:47:11 checking machine... 2023/06/21 01:47:11 checking revisions... [ 34.410732] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:47:11 testing simple program... [ 34.464602] cgroup: Unknown subsys name 'net' [ 34.504674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:47:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc22b3fff8 CR3=0000000005482000 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=00007fa05a11851000005628feb81790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86139744 RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 00007f718cf0b900 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=00007f8fe1b1a650 CR3=000000000f614000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e5d86a72bdfaa75b00000000000ae988 XMM05=570665537462033a0000000000132fa0 XMM06=dfcdbad4f1609c370000000000131e38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000