syzkaller login: [ 66.095911] BUG: Bad rss-counter state mm:00000000e6790867 type:MM_FILEPAGES val:33 [ 66.096925] BUG: Bad rss-counter state mm:00000000e6790867 type:MM_ANONPAGES val:22 [ 66.266804] ================================================================== [ 66.267736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.268709] Read of size 8 at addr ffff88800f229880 by task sshd/225 [ 66.269503] [ 66.269719] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 66.270624] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.271597] Call Trace: [ 66.271925] [ 66.272214] dump_stack_lvl+0x91/0xf0 [ 66.272710] print_report+0xcc/0x620 [ 66.273189] ? __virt_addr_valid+0x102/0x340 [ 66.273733] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.274353] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.275008] kasan_report+0xbe/0xf0 [ 66.275470] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.276071] vma_interval_tree_remove+0xc75/0xec0 [ 66.276676] vma_prepare+0xc54/0x11a0 [ 66.277157] __split_vma+0x5af/0x950 [ 66.277640] ? __pfx___split_vma+0x10/0x10 [ 66.278171] ? find_held_lock+0x2c/0x110 [ 66.278742] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.279305] ? lock_is_held_type+0x9f/0x120 [ 66.279838] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.280465] ? mtree_range_walk+0x632/0x900 [ 66.281026] ? mas_walk+0x5c7/0x7c0 [ 66.281484] do_vmi_munmap+0x1f1/0x2b0 [ 66.281957] mmap_region+0x1f9/0x2660 [ 66.282465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.282986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.283711] ? __pfx_lock_acquire+0x10/0x10 [ 66.284227] ? __pfx_mmap_region+0x10/0x10 [ 66.284738] ? security_mmap_addr+0x7d/0xa0 [ 66.285250] ? get_unmapped_area+0x1f5/0x3f0 [ 66.285786] do_mmap+0x854/0xf00 [ 66.286208] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.286686] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.287244] ksys_mmap_pgoff+0x3af/0x500 [ 66.287779] do_syscall_64+0x3f/0x90 [ 66.288258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.288885] RIP: 0033:0x7fa01a648d82 [ 66.289328] 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 [ 66.291430] RSP: 002b:00007ffcfea4eca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.292308] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa01a648d82 [ 66.293136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa019a82000 [ 66.293986] RBP: 00007fa019a82000 R08: 0000000000000009 R09: 0000000000001000 [ 66.294823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc7cb92f70 [ 66.295639] R13: 00007ffcfea4ecc0 R14: 00007ffcfea4ecf0 R15: 00007ffcfea4f050 [ 66.296740] [ 66.297115] [ 66.297394] Allocated by task 218: [ 66.297948] kasan_save_stack+0x22/0x50 [ 66.298607] kasan_set_track+0x25/0x30 [ 66.299104] __kasan_slab_alloc+0x59/0x70 [ 66.299640] kmem_cache_alloc+0x16b/0x370 [ 66.300149] vm_area_dup+0x20/0x160 [ 66.300611] __split_vma+0x170/0x950 [ 66.301064] split_vma+0xc6/0x110 [ 66.301520] mprotect_fixup+0x8d2/0xb30 [ 66.302015] do_mprotect_pkey+0x87e/0xd40 [ 66.302586] __x64_sys_mprotect+0x78/0xc0 [ 66.303111] do_syscall_64+0x3f/0x90 [ 66.303601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.304220] [ 66.304459] Freed by task 19: [ 66.304855] kasan_save_stack+0x22/0x50 [ 66.305503] kasan_set_track+0x25/0x30 [ 66.306082] kasan_save_free_info+0x2b/0x50 [ 66.306638] __kasan_slab_free+0x10a/0x190 [ 66.307175] kmem_cache_free+0x10d/0x4d0 [ 66.307689] rcu_core+0x8c8/0x2860 [ 66.308121] __do_softirq+0x1b7/0x7d4 [ 66.308639] [ 66.308848] Last potentially related work creation: [ 66.309433] kasan_save_stack+0x22/0x50 [ 66.309918] __kasan_record_aux_stack+0x8e/0xa0 [ 66.310497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.311129] remove_vma+0x139/0x170 [ 66.311578] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.312117] do_vmi_munmap+0x1f1/0x2b0 [ 66.312611] __vm_munmap+0x138/0x3a0 [ 66.313064] __x64_sys_munmap+0x59/0x80 [ 66.313568] do_syscall_64+0x3f/0x90 [ 66.314030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.314677] [ 66.314908] The buggy address belongs to the object at ffff88800f229828 [ 66.314908] which belongs to the cache vm_area_struct of size 168 [ 66.316356] The buggy address is located 88 bytes inside of [ 66.316356] freed 168-byte region [ffff88800f229828, ffff88800f2298d0) [ 66.317716] [ 66.317943] The buggy address belongs to the physical page: [ 66.318654] page:00000000cceaecb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf229 [ 66.319752] memcg:ffff888009517e01 [ 66.320171] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.320809] page_type: 0xffffffff() [ 66.321256] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 66.322159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009517e01 [ 66.323099] page dumped because: kasan: bad access detected [ 66.323786] [ 66.323991] Memory state around the buggy address: [ 66.324554] ffff88800f229780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 66.325380] ffff88800f229800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 66.326206] >ffff88800f229880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 66.327102] ^ [ 66.327513] ffff88800f229900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.328377] ffff88800f229980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 66.329199] ================================================================== [ 66.330128] Disabling lock debugging due to kernel taint [ 68.789381] BUG: Bad rss-counter state mm:0000000010639be8 type:MM_FILEPAGES val:33 [ 68.790561] BUG: Bad rss-counter state mm:0000000010639be8 type:MM_ANONPAGES val:22 [ 69.247334] BUG: Bad rss-counter state mm:00000000671810b5 type:MM_FILEPAGES val:33 [ 69.248527] BUG: Bad rss-counter state mm:00000000671810b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10872' (ECDSA) to the list of known hosts. 2023/06/21 02:46:57 fuzzer started 2023/06/21 02:46:58 dialing manager at localhost:36067 2023/06/21 02:46:58 checking machine... 2023/06/21 02:46:58 checking revisions... [ 69.905776] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:46:58 testing simple program... [ 69.959729] cgroup: Unknown subsys name 'net' [ 70.016347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:46:57 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8364e0a1 RDX=00000000000264e0 RSI=00000000000264e0 RDI=ffffffff86582d70 RBP=ffff88800fcc7390 RSP=ffff88800fcc72c8 R8 =0000000000000000 R9 =ffff88800fcc7378 R10=0000000000038001 R11=000000000008affe R12=ffff88800fcc7398 R13=ffff88800fcc7380 R14=ffff88800fcc7379 R15=ffff88800fcc7338 RIP=ffffffff811307c2 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 00007fb62dfc6900 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=00005622afb52c70 CR3=0000000013b56000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=77c6bd1b035e23b700000000000ae988 XMM05=281fea2114b572220000000000134088 XMM06=1f145572964739b10000000000132e28 XMM07=fb795ef6d657705600000000001223d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fcd132d4366 RCX=0000000000000000 RDX=ffff8880159bb680 RSI=00007fcd132d4366 RDI=ffffffff85652b60 RBP=00007fcd132d4366 RSP=ffff88800f21f808 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800f21f918 R13=0000000000000000 R14=ffff8880159bb680 R15=ffff88800e8975f0 RIP=ffffffff814c8454 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 00007fcd12de1900 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=00007fffa1df9000 CR3=000000000fd22000 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=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