syzkaller login: [ 31.554720] BUG: Bad rss-counter state mm:00000000c1f9dd28 type:MM_FILEPAGES val:33 [ 31.555949] BUG: Bad rss-counter state mm:00000000c1f9dd28 type:MM_ANONPAGES val:22 [ 31.670627] ================================================================== [ 31.671720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.672862] Read of size 8 at addr ffff88800dc433f8 by task sshd/221 [ 31.673876] [ 31.674106] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.675014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.676071] Call Trace: [ 31.676409] [ 31.676713] dump_stack_lvl+0x91/0xf0 [ 31.677242] print_report+0xcc/0x620 [ 31.677755] ? __virt_addr_valid+0x102/0x340 [ 31.678342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.678998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.679656] kasan_report+0xbe/0xf0 [ 31.680182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680860] vma_interval_tree_remove+0xc75/0xec0 [ 31.681546] vma_prepare+0xc54/0x11a0 [ 31.682082] __split_vma+0x5af/0x950 [ 31.682610] ? __pfx___split_vma+0x10/0x10 [ 31.683190] ? find_held_lock+0x2c/0x110 [ 31.683777] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.684407] ? lock_is_held_type+0x9f/0x120 [ 31.685027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.685703] ? mtree_range_walk+0x632/0x900 [ 31.686324] ? mas_walk+0x5c7/0x7c0 [ 31.686853] do_vmi_munmap+0x1f1/0x2b0 [ 31.687399] mmap_region+0x1f9/0x2660 [ 31.687934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.688494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.689284] ? __pfx_lock_acquire+0x10/0x10 [ 31.689882] ? __pfx_mmap_region+0x10/0x10 [ 31.690468] ? security_mmap_addr+0x7d/0xa0 [ 31.691067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.691675] do_mmap+0x854/0xf00 [ 31.692166] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.692718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.693356] ksys_mmap_pgoff+0x3af/0x500 [ 31.693918] do_syscall_64+0x3f/0x90 [ 31.694449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695173] RIP: 0033:0x7f005d6ced82 [ 31.695678] 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 [ 31.698047] RSP: 002b:00007ffdccca45c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.699056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f005d6ced82 [ 31.699994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f005cb08000 [ 31.700946] RBP: 00007f005cb08000 R08: 0000000000000009 R09: 0000000000001000 [ 31.701886] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652a33b7ec0 [ 31.702819] R13: 00007ffdccca45e0 R14: 00007ffdccca4610 R15: 00007ffdccca4970 [ 31.703758] [ 31.704085] [ 31.704321] Allocated by task 214: [ 31.704797] kasan_save_stack+0x22/0x50 [ 31.705368] kasan_set_track+0x25/0x30 [ 31.705914] __kasan_slab_alloc+0x59/0x70 [ 31.706494] kmem_cache_alloc+0x16b/0x370 [ 31.707065] vm_area_dup+0x20/0x160 [ 31.707573] __split_vma+0x170/0x950 [ 31.708093] split_vma+0xc6/0x110 [ 31.708589] mprotect_fixup+0x8d2/0xb30 [ 31.709144] do_mprotect_pkey+0x87e/0xd40 [ 31.709725] __x64_sys_mprotect+0x78/0xc0 [ 31.710301] do_syscall_64+0x3f/0x90 [ 31.710824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.711545] [ 31.711785] Freed by task 214: [ 31.712222] kasan_save_stack+0x22/0x50 [ 31.712783] kasan_set_track+0x25/0x30 [ 31.713349] kasan_save_free_info+0x2b/0x50 [ 31.713946] __kasan_slab_free+0x10a/0x190 [ 31.714547] kmem_cache_free+0x10d/0x4d0 [ 31.715116] rcu_core+0x8c8/0x2860 [ 31.715604] __do_softirq+0x1b7/0x7d4 [ 31.716134] [ 31.716371] Last potentially related work creation: [ 31.717018] kasan_save_stack+0x22/0x50 [ 31.717577] __kasan_record_aux_stack+0x8e/0xa0 [ 31.718209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.718926] remove_vma+0x139/0x170 [ 31.719426] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.720045] do_vmi_munmap+0x1f1/0x2b0 [ 31.720589] __vm_munmap+0x138/0x3a0 [ 31.721109] __x64_sys_munmap+0x59/0x80 [ 31.721658] do_syscall_64+0x3f/0x90 [ 31.722187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.722906] [ 31.723139] Second to last potentially related work creation: [ 31.723899] kasan_save_stack+0x22/0x50 [ 31.724462] __kasan_record_aux_stack+0x8e/0xa0 [ 31.725117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.725836] remove_vma+0x139/0x170 [ 31.726341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.726961] do_vmi_munmap+0x1f1/0x2b0 [ 31.727502] mmap_region+0x1f9/0x2660 [ 31.728036] do_mmap+0x854/0xf00 [ 31.728509] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.729047] ksys_mmap_pgoff+0x3af/0x500 [ 31.729608] do_syscall_64+0x3f/0x90 [ 31.730136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730851] [ 31.731089] The buggy address belongs to the object at ffff88800dc433a0 [ 31.731089] which belongs to the cache vm_area_struct of size 168 [ 31.732730] The buggy address is located 88 bytes inside of [ 31.732730] freed 168-byte region [ffff88800dc433a0, ffff88800dc43448) [ 31.734314] [ 31.734555] The buggy address belongs to the physical page: [ 31.735289] page:00000000b388d3d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc43 [ 31.736509] memcg:ffff88800de15501 [ 31.736984] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.737756] page_type: 0xffffffff() [ 31.738260] raw: 0100000000000200 ffff8880087a0c80 ffffea000037e8c0 dead000000000003 [ 31.739295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de15501 [ 31.740309] page dumped because: kasan: bad access detected [ 31.741045] [ 31.741282] Memory state around the buggy address: [ 31.741934] ffff88800dc43280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.742891] ffff88800dc43300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.743854] >ffff88800dc43380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.744802] ^ [ 31.745751] ffff88800dc43400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.746710] ffff88800dc43480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.747658] ================================================================== [ 31.748750] Disabling lock debugging due to kernel taint [ 33.597746] BUG: Bad rss-counter state mm:00000000642e304d type:MM_FILEPAGES val:33 [ 33.598599] BUG: Bad rss-counter state mm:00000000642e304d type:MM_ANONPAGES val:22 [ 34.137959] BUG: Bad rss-counter state mm:0000000093018408 type:MM_FILEPAGES val:33 [ 34.139024] BUG: Bad rss-counter state mm:0000000093018408 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65333' (ECDSA) to the list of known hosts. 2023/06/20 10:52:19 fuzzer started 2023/06/20 10:52:19 dialing manager at localhost:36067 2023/06/20 10:52:19 checking machine... 2023/06/20 10:52:19 checking revisions... [ 34.766057] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:52:20 testing simple program... [ 34.807335] cgroup: Unknown subsys name 'net' [ 34.878587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:52:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801c9cf8f8 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88801c9cf950 RSP=ffff88801c9cf8e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801c9cf9c0 R13=0000000000000000 R14=ffff888016110000 R15=0000000000092cc0 RIP=ffffffff81130399 RFL=00000207 [-----PC] 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 00007febc82bd900 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=00007ffe08ec8ff8 CR3=0000000010342000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007ff607274a90 CR3=0000000016ab2000 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=2039313a32353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32353a3031203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000