syzkaller login: [ 38.736132] BUG: Bad rss-counter state mm:00000000a3f4cfb3 type:MM_FILEPAGES val:33 [ 38.736789] BUG: Bad rss-counter state mm:00000000a3f4cfb3 type:MM_ANONPAGES val:22 [ 38.840932] ================================================================== [ 38.841651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.842373] Read of size 8 at addr ffff888016676b38 by task sshd/219 [ 38.842976] [ 38.843142] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.843816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.844580] Call Trace: [ 38.844990] [ 38.845223] dump_stack_lvl+0x91/0xf0 [ 38.845607] print_report+0xcc/0x620 [ 38.845976] ? __virt_addr_valid+0x102/0x340 [ 38.846403] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846873] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847366] kasan_report+0xbe/0xf0 [ 38.847646] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847978] vma_interval_tree_remove+0xc75/0xec0 [ 38.848305] vma_prepare+0xc54/0x11a0 [ 38.848566] __split_vma+0x5af/0x950 [ 38.848821] ? __pfx___split_vma+0x10/0x10 [ 38.849115] ? find_held_lock+0x2c/0x110 [ 38.849409] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.849718] ? lock_is_held_type+0x9f/0x120 [ 38.850010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.850334] ? mtree_range_walk+0x632/0x900 [ 38.850633] ? mas_walk+0x5c7/0x7c0 [ 38.850891] do_vmi_munmap+0x1f1/0x2b0 [ 38.851156] mmap_region+0x1f9/0x2660 [ 38.851416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.851693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.852074] ? __pfx_lock_acquire+0x10/0x10 [ 38.852358] ? __pfx_mmap_region+0x10/0x10 [ 38.852643] ? security_mmap_addr+0x7d/0xa0 [ 38.852932] ? get_unmapped_area+0x1f5/0x3f0 [ 38.853234] do_mmap+0x854/0xf00 [ 38.853471] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.853739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.854039] ksys_mmap_pgoff+0x3af/0x500 [ 38.854312] do_syscall_64+0x3f/0x90 [ 38.854571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854919] RIP: 0033:0x7f6c8e6e2d82 [ 38.855169] 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 [ 38.856324] RSP: 002b:00007ffce1effbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.856810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c8e6e2d82 [ 38.857277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c8db1c000 [ 38.857736] RBP: 00007f6c8db1c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.858192] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fcef55ec0 [ 38.858645] R13: 00007ffce1effbf0 R14: 00007ffce1effc20 R15: 00007ffce1efff80 [ 38.859103] [ 38.859261] [ 38.859378] Allocated by task 212: [ 38.859620] kasan_save_stack+0x22/0x50 [ 38.859894] kasan_set_track+0x25/0x30 [ 38.860161] __kasan_slab_alloc+0x59/0x70 [ 38.860443] kmem_cache_alloc+0x16b/0x370 [ 38.860720] vm_area_dup+0x20/0x160 [ 38.860966] __split_vma+0x170/0x950 [ 38.861228] split_vma+0xc6/0x110 [ 38.861471] mprotect_fixup+0x8d2/0xb30 [ 38.861747] do_mprotect_pkey+0x87e/0xd40 [ 38.862028] __x64_sys_mprotect+0x78/0xc0 [ 38.862309] do_syscall_64+0x3f/0x90 [ 38.862566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862914] [ 38.863030] Freed by task 0: [ 38.863233] kasan_save_stack+0x22/0x50 [ 38.863508] kasan_set_track+0x25/0x30 [ 38.863775] kasan_save_free_info+0x2b/0x50 [ 38.864063] __kasan_slab_free+0x10a/0x190 [ 38.864351] kmem_cache_free+0x10d/0x4d0 [ 38.864624] rcu_core+0x8c8/0x2860 [ 38.864864] __do_softirq+0x1b7/0x7d4 [ 38.865121] [ 38.865250] Last potentially related work creation: [ 38.865573] kasan_save_stack+0x22/0x50 [ 38.865844] __kasan_record_aux_stack+0x8e/0xa0 [ 38.866152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.866502] remove_vma+0x139/0x170 [ 38.866747] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.867045] do_vmi_munmap+0x1f1/0x2b0 [ 38.867308] __vm_munmap+0x138/0x3a0 [ 38.867559] __x64_sys_munmap+0x59/0x80 [ 38.867825] do_syscall_64+0x3f/0x90 [ 38.868081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.868425] [ 38.868542] The buggy address belongs to the object at ffff888016676ae0 [ 38.868542] which belongs to the cache vm_area_struct of size 168 [ 38.869337] The buggy address is located 88 bytes inside of [ 38.869337] freed 168-byte region [ffff888016676ae0, ffff888016676b88) [ 38.870091] [ 38.870208] The buggy address belongs to the physical page: [ 38.870566] page:00000000ba4409bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16676 [ 38.871155] memcg:ffff888016908c01 [ 38.871386] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.871736] page_type: 0xffffffff() [ 38.871979] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386080 dead000000000006 [ 38.872475] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016908c01 [ 38.872962] page dumped because: kasan: bad access detected [ 38.873320] [ 38.873437] Memory state around the buggy address: [ 38.873748] ffff888016676a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.874209] ffff888016676a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.874669] >ffff888016676b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.875123] ^ [ 38.875451] ffff888016676b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.875907] ffff888016676c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.876362] ================================================================== [ 38.876883] Disabling lock debugging due to kernel taint [ 40.881472] BUG: Bad rss-counter state mm:00000000ffd5fa7b type:MM_FILEPAGES val:33 [ 40.882754] BUG: Bad rss-counter state mm:00000000ffd5fa7b type:MM_ANONPAGES val:22 [ 41.284709] BUG: Bad rss-counter state mm:000000006aa15336 type:MM_FILEPAGES val:33 [ 41.285749] BUG: Bad rss-counter state mm:000000006aa15336 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61561' (ECDSA) to the list of known hosts. 2023/06/20 19:35:07 fuzzer started 2023/06/20 19:35:07 dialing manager at localhost:36067 2023/06/20 19:35:07 checking machine... 2023/06/20 19:35:07 checking revisions... [ 41.999702] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:35:07 testing simple program... [ 42.046188] cgroup: Unknown subsys name 'net' [ 42.112950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:06 Registers: info registers vcpu 0 RAX=ffff88800b469490 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818a313f RDI=dffffc0000000000 RBP=00000003e690d52d RSP=ffff8880146e75c0 R8 =0000000000000001 R9 =000000000000002e R10=0000000000000072 R11=0000000000000001 R12=ffff8880146e778c R13=e2f55236f51925a6 R14=ffff8880146e7750 R15=ffff88800da4b321 RIP=ffffffff818a3198 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 00007fc2b6e40900 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=00007fc2b622d2a0 CR3=0000000009750000 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=71662c856097870d00000000000ae988 XMM05=98e3503fc1a5cc5a0000000000132958 XMM06=806171799158d9670000000000131688 XMM07=fb795ef6d65770560000000000121bf8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800efe0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800efdfa01 RSI=ffff88800efdfa30 RDI=ffff88800efdf5b0 RBP=ffff88800efdf5f8 RSP=ffff88800efdf528 R8 =ffffffff863de440 R9 =ffff88800efdf5e0 R10=0000000000038001 R11=0000000000091bde R12=ffff88800efdf600 R13=ffff88800efdf5e8 R14=ffff88800efdfa38 R15=ffff88800efdf5a0 RIP=ffffffff811304d5 RFL=00000296 [--S-AP-] 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 00007fe773aa7900 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=00007ffd23a43000 CR3=000000000cd24000 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