syzkaller login: [ 31.261310] BUG: Bad rss-counter state mm:00000000f90c6634 type:MM_FILEPAGES val:33 [ 31.262509] BUG: Bad rss-counter state mm:00000000f90c6634 type:MM_ANONPAGES val:22 [ 31.411208] ================================================================== [ 31.412169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.413126] Read of size 8 at addr ffff888016a9eb38 by task sshd/220 [ 31.413888] [ 31.414105] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.415138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.416154] Call Trace: [ 31.416488] [ 31.416781] dump_stack_lvl+0x91/0xf0 [ 31.417285] print_report+0xcc/0x620 [ 31.417772] ? __virt_addr_valid+0x102/0x340 [ 31.418327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419580] kasan_report+0xbe/0xf0 [ 31.420058] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420723] vma_interval_tree_remove+0xc75/0xec0 [ 31.421345] vma_prepare+0xc54/0x11a0 [ 31.421834] __split_vma+0x5af/0x950 [ 31.422316] ? __pfx___split_vma+0x10/0x10 [ 31.422855] ? find_held_lock+0x2c/0x110 [ 31.423393] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.423978] ? lock_is_held_type+0x9f/0x120 [ 31.424542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.425178] ? mtree_range_walk+0x632/0x900 [ 31.425748] ? mas_walk+0x5c7/0x7c0 [ 31.426247] do_vmi_munmap+0x1f1/0x2b0 [ 31.426755] mmap_region+0x1f9/0x2660 [ 31.427246] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.427773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.428527] ? __pfx_lock_acquire+0x10/0x10 [ 31.429073] ? __pfx_mmap_region+0x10/0x10 [ 31.429626] ? security_mmap_addr+0x7d/0xa0 [ 31.430180] ? get_unmapped_area+0x1f5/0x3f0 [ 31.430739] do_mmap+0x854/0xf00 [ 31.431188] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.431697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.432276] ksys_mmap_pgoff+0x3af/0x500 [ 31.432798] do_syscall_64+0x3f/0x90 [ 31.433286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433952] RIP: 0033:0x7f7511524d82 [ 31.434426] 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 [ 31.436645] RSP: 002b:00007fff71fb1e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.437558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7511524d82 [ 31.438363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f751095e000 [ 31.439156] RBP: 00007f751095e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.439955] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591cca28ec0 [ 31.440840] R13: 00007fff71fb1e80 R14: 00007fff71fb1eb0 R15: 00007fff71fb2210 [ 31.441738] [ 31.442036] [ 31.442271] Allocated by task 213: [ 31.442730] kasan_save_stack+0x22/0x50 [ 31.443256] kasan_set_track+0x25/0x30 [ 31.443760] __kasan_slab_alloc+0x59/0x70 [ 31.444295] kmem_cache_alloc+0x16b/0x370 [ 31.444818] vm_area_dup+0x20/0x160 [ 31.445271] __split_vma+0x170/0x950 [ 31.445742] split_vma+0xc6/0x110 [ 31.446181] mprotect_fixup+0x8d2/0xb30 [ 31.446690] do_mprotect_pkey+0x87e/0xd40 [ 31.447213] __x64_sys_mprotect+0x78/0xc0 [ 31.447746] do_syscall_64+0x3f/0x90 [ 31.448238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448895] [ 31.449112] Freed by task 213: [ 31.449503] kasan_save_stack+0x22/0x50 [ 31.450009] kasan_set_track+0x25/0x30 [ 31.450507] kasan_save_free_info+0x2b/0x50 [ 31.451042] __kasan_slab_free+0x10a/0x190 [ 31.451587] kmem_cache_free+0x10d/0x4d0 [ 31.452103] rcu_core+0x8c8/0x2860 [ 31.452557] __do_softirq+0x1b7/0x7d4 [ 31.453041] [ 31.453258] Last potentially related work creation: [ 31.453862] kasan_save_stack+0x22/0x50 [ 31.454393] __kasan_record_aux_stack+0x8e/0xa0 [ 31.454993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.455790] remove_vma+0x139/0x170 [ 31.456287] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.456875] do_vmi_munmap+0x1f1/0x2b0 [ 31.457375] __vm_munmap+0x138/0x3a0 [ 31.457844] __x64_sys_munmap+0x59/0x80 [ 31.458362] do_syscall_64+0x3f/0x90 [ 31.458862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459533] [ 31.459761] The buggy address belongs to the object at ffff888016a9eae0 [ 31.459761] which belongs to the cache vm_area_struct of size 168 [ 31.461325] The buggy address is located 88 bytes inside of [ 31.461325] freed 168-byte region [ffff888016a9eae0, ffff888016a9eb88) [ 31.462804] [ 31.463025] The buggy address belongs to the physical page: [ 31.463717] page:00000000e954304a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a9e [ 31.464864] memcg:ffff888016a96b01 [ 31.465304] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.465987] page_type: 0xffffffff() [ 31.466458] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.467420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a96b01 [ 31.468390] page dumped because: kasan: bad access detected [ 31.469086] [ 31.469310] Memory state around the buggy address: [ 31.469924] ffff888016a9ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.470826] ffff888016a9ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.471694] >ffff888016a9eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.472600] ^ [ 31.473240] ffff888016a9eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.474138] ffff888016a9ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.475038] ================================================================== [ 31.476212] Disabling lock debugging due to kernel taint [ 33.680988] BUG: Bad rss-counter state mm:0000000061648ea8 type:MM_FILEPAGES val:33 [ 33.682169] BUG: Bad rss-counter state mm:0000000061648ea8 type:MM_ANONPAGES val:22 [ 34.098145] BUG: Bad rss-counter state mm:00000000c8ab2d72 type:MM_FILEPAGES val:33 [ 34.099416] BUG: Bad rss-counter state mm:00000000c8ab2d72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48069' (ECDSA) to the list of known hosts. 2023/06/20 17:12:25 fuzzer started 2023/06/20 17:12:25 dialing manager at localhost:36067 2023/06/20 17:12:25 checking machine... 2023/06/20 17:12:25 checking revisions... [ 34.790557] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:12:26 testing simple program... [ 34.841571] cgroup: Unknown subsys name 'net' [ 34.882436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:12:25 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000000040 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88801596f230 R8 =ffffffff860d8256 R9 =ffff88801596f328 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd838 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc60 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 00007f4522ec5700 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=00007efd2ad9d618 CR3=0000000016b56000 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=3a5d3932325b646873732035323a3231 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383931 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9303429f80 CR3=0000000016b56000 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=2035323a32313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32313a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000