syzkaller login: [ 41.179028] BUG: Bad rss-counter state mm:000000007d56ee19 type:MM_FILEPAGES val:33 [ 41.179987] BUG: Bad rss-counter state mm:000000007d56ee19 type:MM_ANONPAGES val:22 [ 41.345361] ================================================================== [ 41.346288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.347223] Read of size 8 at addr ffff888016c1f228 by task sshd/219 [ 41.347948] [ 41.348156] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.349073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.349996] Call Trace: [ 41.350303] [ 41.350573] dump_stack_lvl+0x91/0xf0 [ 41.351039] print_report+0xcc/0x620 [ 41.351496] ? __virt_addr_valid+0x102/0x340 [ 41.352022] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.352598] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.353177] kasan_report+0xbe/0xf0 [ 41.353650] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.354233] vma_interval_tree_remove+0xc75/0xec0 [ 41.354805] vma_prepare+0xc54/0x11a0 [ 41.355256] __split_vma+0x5af/0x950 [ 41.355711] ? __pfx___split_vma+0x10/0x10 [ 41.356207] ? find_held_lock+0x2c/0x110 [ 41.356723] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.357290] ? lock_is_held_type+0x9f/0x120 [ 41.357844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.358455] ? mtree_range_walk+0x632/0x900 [ 41.358998] ? mas_walk+0x5c7/0x7c0 [ 41.359464] do_vmi_munmap+0x1f1/0x2b0 [ 41.359942] mmap_region+0x1f9/0x2660 [ 41.360418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.360934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.361660] ? __pfx_lock_acquire+0x10/0x10 [ 41.362193] ? __pfx_mmap_region+0x10/0x10 [ 41.362718] ? security_mmap_addr+0x7d/0xa0 [ 41.363250] ? get_unmapped_area+0x1f5/0x3f0 [ 41.363798] do_mmap+0x854/0xf00 [ 41.364241] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.364741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.365304] ksys_mmap_pgoff+0x3af/0x500 [ 41.365828] do_syscall_64+0x3f/0x90 [ 41.366295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.366940] RIP: 0033:0x7f2ab1fcdd82 [ 41.367395] 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 [ 41.369515] RSP: 002b:00007ffee37f8b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.370418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ab1fcdd82 [ 41.371265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ab1407000 [ 41.372110] RBP: 00007f2ab1407000 R08: 0000000000000009 R09: 0000000000001000 [ 41.372961] R10: 0000000000000812 R11: 0000000000000206 R12: 000056209ff0ad90 [ 41.373821] R13: 00007ffee37f8b40 R14: 00007ffee37f8b70 R15: 00007ffee37f8ed0 [ 41.374680] [ 41.374971] [ 41.375181] Allocated by task 212: [ 41.375608] kasan_save_stack+0x22/0x50 [ 41.376109] kasan_set_track+0x25/0x30 [ 41.376603] __kasan_slab_alloc+0x59/0x70 [ 41.377123] kmem_cache_alloc+0x16b/0x370 [ 41.377648] vm_area_dup+0x20/0x160 [ 41.378100] __split_vma+0x170/0x950 [ 41.378569] split_vma+0xc6/0x110 [ 41.379006] mprotect_fixup+0x8d2/0xb30 [ 41.379515] do_mprotect_pkey+0x87e/0xd40 [ 41.380028] __x64_sys_mprotect+0x78/0xc0 [ 41.380548] do_syscall_64+0x3f/0x90 [ 41.381015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.381677] [ 41.381882] Freed by task 102: [ 41.382256] kasan_save_stack+0x22/0x50 [ 41.382730] kasan_set_track+0x25/0x30 [ 41.383200] kasan_save_free_info+0x2b/0x50 [ 41.383703] __kasan_slab_free+0x10a/0x190 [ 41.384205] kmem_cache_free+0x10d/0x4d0 [ 41.384682] rcu_core+0x8c8/0x2860 [ 41.385102] __do_softirq+0x1b7/0x7d4 [ 41.385559] [ 41.385774] Last potentially related work creation: [ 41.386332] kasan_save_stack+0x22/0x50 [ 41.386813] __kasan_record_aux_stack+0x8e/0xa0 [ 41.387357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.387967] remove_vma+0x139/0x170 [ 41.388393] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.388919] do_vmi_munmap+0x1f1/0x2b0 [ 41.389378] __vm_munmap+0x138/0x3a0 [ 41.389826] __x64_sys_munmap+0x59/0x80 [ 41.390300] do_syscall_64+0x3f/0x90 [ 41.390768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.391408] [ 41.391624] The buggy address belongs to the object at ffff888016c1f1d0 [ 41.391624] which belongs to the cache vm_area_struct of size 168 [ 41.393085] The buggy address is located 88 bytes inside of [ 41.393085] freed 168-byte region [ffff888016c1f1d0, ffff888016c1f278) [ 41.394499] [ 41.394712] The buggy address belongs to the physical page: [ 41.395363] page:000000005f8daf87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c1f [ 41.396426] memcg:ffff888016c18201 [ 41.396843] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.397485] page_type: 0xffffffff() [ 41.397941] raw: 0100000000000200 ffff88800879fc80 ffffea000036a0c0 dead000000000002 [ 41.398864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c18201 [ 41.399766] page dumped because: kasan: bad access detected [ 41.400419] [ 41.400629] Memory state around the buggy address: [ 41.401205] ffff888016c1f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.402081] ffff888016c1f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.402927] >ffff888016c1f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.403778] ^ [ 41.404343] ffff888016c1f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.405188] ffff888016c1f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.406040] ================================================================== [ 41.407081] Disabling lock debugging due to kernel taint [ 43.325231] BUG: Bad rss-counter state mm:00000000ec3c9997 type:MM_FILEPAGES val:33 [ 43.326015] BUG: Bad rss-counter state mm:00000000ec3c9997 type:MM_ANONPAGES val:22 [ 43.796198] BUG: Bad rss-counter state mm:0000000056d03850 type:MM_FILEPAGES val:33 [ 43.797910] BUG: Bad rss-counter state mm:0000000056d03850 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63221' (ECDSA) to the list of known hosts. 2023/06/20 03:36:47 fuzzer started 2023/06/20 03:36:47 dialing manager at localhost:44161 2023/06/20 03:36:47 checking machine... 2023/06/20 03:36:47 checking revisions... [ 44.494123] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:36:47 testing simple program... [ 44.544555] cgroup: Unknown subsys name 'net' [ 44.582265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:36:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f3506a98f80 CR3=000000000e31e000 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=2037343a36333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36333a3330203032 XMM08=00000000000000000000003f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fa144a57d77 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800ff90001 RSI=ffff88800ff8ff58 RDI=ffff88800ff8ffd8 RBP=ffff88800ff8f930 RSP=ffff88800ff8f860 R8 =ffffffff864b9d5a R9 =ffff88800ff8f918 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800ff8f938 R13=ffff88800ff8f920 R14=ffff88800ff8ff58 R15=ffff88800ff8f8d8 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fa144570900 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=00007fffa9517000 CR3=000000001a32c000 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=563412feff00545000000000000080fe 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