syzkaller login: [ 35.814724] BUG: Bad rss-counter state mm:0000000089c5b184 type:MM_FILEPAGES val:33 [ 35.815933] BUG: Bad rss-counter state mm:0000000089c5b184 type:MM_ANONPAGES val:22 [ 35.856933] ================================================================== [ 35.858029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.858982] Read of size 8 at addr ffff8880100593f8 by task sshd/219 [ 35.859918] [ 35.860145] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.861029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.862054] Call Trace: [ 35.862385] [ 35.862670] dump_stack_lvl+0x91/0xf0 [ 35.863173] print_report+0xcc/0x620 [ 35.863670] ? __virt_addr_valid+0x102/0x340 [ 35.864225] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.864854] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.865496] kasan_report+0xbe/0xf0 [ 35.865985] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.866609] vma_interval_tree_remove+0xc75/0xec0 [ 35.867220] vma_prepare+0xc54/0x11a0 [ 35.867699] __split_vma+0x5af/0x950 [ 35.868181] ? __pfx___split_vma+0x10/0x10 [ 35.868717] ? find_held_lock+0x2c/0x110 [ 35.869242] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.869841] ? lock_is_held_type+0x9f/0x120 [ 35.870378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.870991] ? mtree_range_walk+0x632/0x900 [ 35.871552] ? mas_walk+0x5c7/0x7c0 [ 35.872065] do_vmi_munmap+0x1f1/0x2b0 [ 35.872571] mmap_region+0x1f9/0x2660 [ 35.873065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.873588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.874339] ? __pfx_lock_acquire+0x10/0x10 [ 35.874879] ? __pfx_mmap_region+0x10/0x10 [ 35.875410] ? security_mmap_addr+0x7d/0xa0 [ 35.875959] ? get_unmapped_area+0x1f5/0x3f0 [ 35.876522] do_mmap+0x854/0xf00 [ 35.876966] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.877478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.878055] ksys_mmap_pgoff+0x3af/0x500 [ 35.878572] do_syscall_64+0x3f/0x90 [ 35.879053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.879711] RIP: 0033:0x7fab74601d82 [ 35.880171] 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 [ 35.882368] RSP: 002b:00007ffed3495908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.883280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab74601d82 [ 35.884140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab73a3b000 [ 35.884997] RBP: 00007fab73a3b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.885865] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c7c23fd90 [ 35.886723] R13: 00007ffed3495920 R14: 00007ffed3495950 R15: 00007ffed3495cb0 [ 35.887593] [ 35.887890] [ 35.888109] Allocated by task 212: [ 35.888539] kasan_save_stack+0x22/0x50 [ 35.889044] kasan_set_track+0x25/0x30 [ 35.889538] __kasan_slab_alloc+0x59/0x70 [ 35.890083] kmem_cache_alloc+0x16b/0x370 [ 35.890618] vm_area_dup+0x20/0x160 [ 35.891087] __split_vma+0x170/0x950 [ 35.891573] split_vma+0xc6/0x110 [ 35.892028] mprotect_fixup+0x8d2/0xb30 [ 35.892543] do_mprotect_pkey+0x87e/0xd40 [ 35.893065] __x64_sys_mprotect+0x78/0xc0 [ 35.893612] do_syscall_64+0x3f/0x90 [ 35.894109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.894786] [ 35.894999] Freed by task 212: [ 35.895410] kasan_save_stack+0x22/0x50 [ 35.895935] kasan_set_track+0x25/0x30 [ 35.896452] kasan_save_free_info+0x2b/0x50 [ 35.897012] __kasan_slab_free+0x10a/0x190 [ 35.897583] kmem_cache_free+0x10d/0x4d0 [ 35.898118] rcu_core+0x8c8/0x2860 [ 35.898597] __do_softirq+0x1b7/0x7d4 [ 35.899148] [ 35.899367] Last potentially related work creation: [ 35.899982] kasan_save_stack+0x22/0x50 [ 35.900497] __kasan_record_aux_stack+0x8e/0xa0 [ 35.901104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.901799] remove_vma+0x139/0x170 [ 35.902281] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.902864] do_vmi_munmap+0x1f1/0x2b0 [ 35.903369] __vm_munmap+0x138/0x3a0 [ 35.903869] __x64_sys_munmap+0x59/0x80 [ 35.904393] do_syscall_64+0x3f/0x90 [ 35.904904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.905584] [ 35.905821] The buggy address belongs to the object at ffff8880100593a0 [ 35.905821] which belongs to the cache vm_area_struct of size 168 [ 35.907396] The buggy address is located 88 bytes inside of [ 35.907396] freed 168-byte region [ffff8880100593a0, ffff888010059448) [ 35.908896] [ 35.909116] The buggy address belongs to the physical page: [ 35.909794] page:00000000d85a875d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10059 [ 35.910945] memcg:ffff88800dd11301 [ 35.911383] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.912127] page_type: 0xffffffff() [ 35.912590] raw: 0100000000000200 ffff8880087a0c80 ffffea0000500ec0 dead000000000003 [ 35.913553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd11301 [ 35.914518] page dumped because: kasan: bad access detected [ 35.915217] [ 35.915442] Memory state around the buggy address: [ 35.916039] ffff888010059280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.916899] ffff888010059300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.917784] >ffff888010059380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.918674] ^ [ 35.919560] ffff888010059400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.920451] ffff888010059480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.921334] ================================================================== [ 35.922524] Disabling lock debugging due to kernel taint [ 38.701351] BUG: Bad rss-counter state mm:0000000049e6f403 type:MM_FILEPAGES val:33 [ 38.702324] BUG: Bad rss-counter state mm:0000000049e6f403 type:MM_ANONPAGES val:22 [ 39.160176] BUG: Bad rss-counter state mm:0000000079d3a0d7 type:MM_FILEPAGES val:33 [ 39.161227] BUG: Bad rss-counter state mm:0000000079d3a0d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33475' (ECDSA) to the list of known hosts. 2023/06/21 02:23:13 fuzzer started 2023/06/21 02:23:13 dialing manager at localhost:36067 2023/06/21 02:23:13 checking machine... 2023/06/21 02:23:13 checking revisions... [ 39.886018] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:23:13 testing simple program... [ 39.936638] cgroup: Unknown subsys name 'net' [ 39.973264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800885e800 RCX=0000000000000000 RDX=ffff888015a19b40 RSI=ffffffff83c1241a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801435f850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800885e7c0 R13=ffff88800ba0a060 R14=0000000000000000 R15=ffff88800ba0a274 RIP=ffffffff813744b4 RFL=00000293 [--S-A-C] 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 00007f3bca49c700 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=0000557b0fb01000 CR3=000000000c688000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032313a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363532 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138976 RDX=0000000000000008 RSI=ffff888008e37d20 RDI=ffff888008e37930 RBP=ffff888008e37988 RSP=ffff888008e378a0 R8 =0000000000000001 R9 =ffff888008e37970 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008e37990 R13=ffff888008e37978 R14=ffff888008e37d20 R15=ffff888008e37930 RIP=ffffffff81130400 RFL=00000283 [--S---C] 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 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=00007f2463ab3618 CR3=000000000d816000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000