syzkaller login: [ 31.658009] BUG: Bad rss-counter state mm:00000000c8d1072d type:MM_FILEPAGES val:33 [ 31.659443] BUG: Bad rss-counter state mm:00000000c8d1072d type:MM_ANONPAGES val:22 [ 31.805110] ================================================================== [ 31.806225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.807188] Read of size 8 at addr ffff88800e9f55c8 by task sshd/219 [ 31.808064] [ 31.808278] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.809147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.810159] Call Trace: [ 31.810477] [ 31.810763] dump_stack_lvl+0x91/0xf0 [ 31.811256] print_report+0xcc/0x620 [ 31.811740] ? __virt_addr_valid+0x102/0x340 [ 31.812298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813577] kasan_report+0xbe/0xf0 [ 31.814062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814694] vma_interval_tree_remove+0xc75/0xec0 [ 31.815302] vma_prepare+0xc54/0x11a0 [ 31.815782] __split_vma+0x5af/0x950 [ 31.816261] ? __pfx___split_vma+0x10/0x10 [ 31.816794] ? find_held_lock+0x2c/0x110 [ 31.817336] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.817901] ? lock_is_held_type+0x9f/0x120 [ 31.818445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.819047] ? mtree_range_walk+0x632/0x900 [ 31.819595] ? mas_walk+0x5c7/0x7c0 [ 31.820076] do_vmi_munmap+0x1f1/0x2b0 [ 31.820570] mmap_region+0x1f9/0x2660 [ 31.821057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.821581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.822298] ? __pfx_lock_acquire+0x10/0x10 [ 31.822861] ? __pfx_mmap_region+0x10/0x10 [ 31.823403] ? security_mmap_addr+0x7d/0xa0 [ 31.823940] ? get_unmapped_area+0x1f5/0x3f0 [ 31.824499] do_mmap+0x854/0xf00 [ 31.824936] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.825455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.826020] ksys_mmap_pgoff+0x3af/0x500 [ 31.826542] do_syscall_64+0x3f/0x90 [ 31.827028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827676] RIP: 0033:0x7fb797dc8d82 [ 31.828140] 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 [ 31.830294] RSP: 002b:00007ffe28a527e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.831242] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb797dc8d82 [ 31.832107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb797202000 [ 31.832976] RBP: 00007fb797202000 R08: 0000000000000009 R09: 0000000000001000 [ 31.833843] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b9d650ec0 [ 31.834697] R13: 00007ffe28a52800 R14: 00007ffe28a52830 R15: 00007ffe28a52b90 [ 31.835564] [ 31.835856] [ 31.836075] Allocated by task 212: [ 31.836515] kasan_save_stack+0x22/0x50 [ 31.837022] kasan_set_track+0x25/0x30 [ 31.837528] __kasan_slab_alloc+0x59/0x70 [ 31.838051] kmem_cache_alloc+0x16b/0x370 [ 31.838573] vm_area_dup+0x20/0x160 [ 31.839029] __split_vma+0x170/0x950 [ 31.839498] split_vma+0xc6/0x110 [ 31.839947] mprotect_fixup+0x8d2/0xb30 [ 31.840453] do_mprotect_pkey+0x87e/0xd40 [ 31.840972] __x64_sys_mprotect+0x78/0xc0 [ 31.841509] do_syscall_64+0x3f/0x90 [ 31.841986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.842636] [ 31.842851] Freed by task 19: [ 31.843237] kasan_save_stack+0x22/0x50 [ 31.843746] kasan_set_track+0x25/0x30 [ 31.844240] kasan_save_free_info+0x2b/0x50 [ 31.844776] __kasan_slab_free+0x10a/0x190 [ 31.845328] kmem_cache_free+0x10d/0x4d0 [ 31.845847] rcu_core+0x8c8/0x2860 [ 31.846293] __do_softirq+0x1b7/0x7d4 [ 31.846778] [ 31.846992] Last potentially related work creation: [ 31.847576] kasan_save_stack+0x22/0x50 [ 31.848082] __kasan_record_aux_stack+0x8e/0xa0 [ 31.848658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.849307] remove_vma+0x139/0x170 [ 31.849761] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.850319] do_vmi_munmap+0x1f1/0x2b0 [ 31.850804] __vm_munmap+0x138/0x3a0 [ 31.851277] __x64_sys_munmap+0x59/0x80 [ 31.851779] do_syscall_64+0x3f/0x90 [ 31.852257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.852903] [ 31.853116] The buggy address belongs to the object at ffff88800e9f5570 [ 31.853116] which belongs to the cache vm_area_struct of size 168 [ 31.854596] The buggy address is located 88 bytes inside of [ 31.854596] freed 168-byte region [ffff88800e9f5570, ffff88800e9f5618) [ 31.856003] [ 31.856221] The buggy address belongs to the physical page: [ 31.856883] page:000000002e1cb7af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9f5 [ 31.857979] memcg:ffff888009f38201 [ 31.858404] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.859059] page_type: 0xffffffff() [ 31.859507] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.860425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f38201 [ 31.861352] page dumped because: kasan: bad access detected [ 31.862017] [ 31.862235] Memory state around the buggy address: [ 31.862815] ffff88800e9f5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.863685] ffff88800e9f5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.864540] >ffff88800e9f5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.865403] ^ [ 31.866100] ffff88800e9f5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.866961] ffff88800e9f5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.867823] ================================================================== [ 31.869189] Disabling lock debugging due to kernel taint [ 33.851229] BUG: Bad rss-counter state mm:00000000c7f21f40 type:MM_FILEPAGES val:33 [ 33.852253] BUG: Bad rss-counter state mm:00000000c7f21f40 type:MM_ANONPAGES val:22 [ 34.411703] BUG: Bad rss-counter state mm:00000000ab51f265 type:MM_FILEPAGES val:33 [ 34.412934] BUG: Bad rss-counter state mm:00000000ab51f265 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64062' (ECDSA) to the list of known hosts. 2023/06/19 15:54:06 fuzzer started 2023/06/19 15:54:06 dialing manager at localhost:44161 2023/06/19 15:54:06 checking machine... 2023/06/19 15:54:06 checking revisions... [ 35.052405] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:54:06 testing simple program... [ 35.104160] cgroup: Unknown subsys name 'net' [ 35.162772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff8880162dd1c0 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88800d92d524 RSP=ffff888015a87a18 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800d92d500 R13=0000000000000001 R14=0000000000000001 R15=ffff88801c998500 RIP=ffffffff814c0320 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 00007fa257726900 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=00007ffe8328d000 CR3=000000000f562000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f68d8f2cac0 CR3=0000000016be4000 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=2036303a34353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000