syzkaller login: [ 30.226847] BUG: Bad rss-counter state mm:0000000078b02db4 type:MM_FILEPAGES val:33 [ 30.227865] BUG: Bad rss-counter state mm:0000000078b02db4 type:MM_ANONPAGES val:22 [ 30.385754] ================================================================== [ 30.386671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.387632] Read of size 8 at addr ffff888015822df0 by task sshd/221 [ 30.388409] [ 30.388623] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.389636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.390625] Call Trace: [ 30.390963] [ 30.391250] dump_stack_lvl+0x91/0xf0 [ 30.391762] print_report+0xcc/0x620 [ 30.392262] ? __virt_addr_valid+0x102/0x340 [ 30.392817] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.393442] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.394056] kasan_report+0xbe/0xf0 [ 30.394543] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.395193] vma_interval_tree_remove+0xc75/0xec0 [ 30.395796] vma_prepare+0xc54/0x11a0 [ 30.396278] __split_vma+0x5af/0x950 [ 30.396750] ? __pfx___split_vma+0x10/0x10 [ 30.397274] ? find_held_lock+0x2c/0x110 [ 30.397794] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.398353] ? lock_is_held_type+0x9f/0x120 [ 30.398893] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.399504] ? mtree_range_walk+0x632/0x900 [ 30.400058] ? mas_walk+0x5c7/0x7c0 [ 30.400535] do_vmi_munmap+0x1f1/0x2b0 [ 30.401028] mmap_region+0x1f9/0x2660 [ 30.401509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.402020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.402725] ? __pfx_lock_acquire+0x10/0x10 [ 30.403259] ? __pfx_mmap_region+0x10/0x10 [ 30.403800] ? security_mmap_addr+0x7d/0xa0 [ 30.404334] ? get_unmapped_area+0x1f5/0x3f0 [ 30.404884] do_mmap+0x854/0xf00 [ 30.405324] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.405819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.406385] ksys_mmap_pgoff+0x3af/0x500 [ 30.406891] do_syscall_64+0x3f/0x90 [ 30.407395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408035] RIP: 0033:0x7f7ae698fd82 [ 30.408492] 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 [ 30.410592] RSP: 002b:00007ffd34f6b768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.411496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ae698fd82 [ 30.412341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ae5dc9000 [ 30.413177] RBP: 00007f7ae5dc9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.414014] R10: 0000000000000812 R11: 0000000000000206 R12: 000056188e356ec0 [ 30.414849] R13: 00007ffd34f6b780 R14: 00007ffd34f6b7b0 R15: 00007ffd34f6bb10 [ 30.415721] [ 30.416013] [ 30.416230] Allocated by task 214: [ 30.416652] kasan_save_stack+0x22/0x50 [ 30.417155] kasan_set_track+0x25/0x30 [ 30.417650] __kasan_slab_alloc+0x59/0x70 [ 30.418175] kmem_cache_alloc+0x16b/0x370 [ 30.418702] vm_area_dup+0x20/0x160 [ 30.419163] __split_vma+0x170/0x950 [ 30.419630] split_vma+0xc6/0x110 [ 30.420069] mprotect_fixup+0x8d2/0xb30 [ 30.420575] do_mprotect_pkey+0x87e/0xd40 [ 30.421097] __x64_sys_mprotect+0x78/0xc0 [ 30.421620] do_syscall_64+0x3f/0x90 [ 30.422095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.422734] [ 30.422957] Freed by task 214: [ 30.423351] kasan_save_stack+0x22/0x50 [ 30.423857] kasan_set_track+0x25/0x30 [ 30.424351] kasan_save_free_info+0x2b/0x50 [ 30.424877] __kasan_slab_free+0x10a/0x190 [ 30.425411] kmem_cache_free+0x10d/0x4d0 [ 30.425919] rcu_core+0x8c8/0x2860 [ 30.426363] __do_softirq+0x1b7/0x7d4 [ 30.426839] [ 30.427071] Last potentially related work creation: [ 30.427660] kasan_save_stack+0x22/0x50 [ 30.428165] __kasan_record_aux_stack+0x8e/0xa0 [ 30.428735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.429369] remove_vma+0x139/0x170 [ 30.429820] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.430371] do_vmi_munmap+0x1f1/0x2b0 [ 30.430912] __vm_munmap+0x138/0x3a0 [ 30.431392] __x64_sys_munmap+0x59/0x80 [ 30.431889] do_syscall_64+0x3f/0x90 [ 30.432368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.433011] [ 30.433227] The buggy address belongs to the object at ffff888015822d98 [ 30.433227] which belongs to the cache vm_area_struct of size 168 [ 30.434684] The buggy address is located 88 bytes inside of [ 30.434684] freed 168-byte region [ffff888015822d98, ffff888015822e40) [ 30.436107] [ 30.436321] The buggy address belongs to the physical page: [ 30.436980] page:00000000a4d4ce40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15822 [ 30.438076] memcg:ffff888015b4aa01 [ 30.438502] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.439153] page_type: 0xffffffff() [ 30.439605] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.440532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b4aa01 [ 30.441432] page dumped because: kasan: bad access detected [ 30.442096] [ 30.442313] Memory state around the buggy address: [ 30.442887] ffff888015822c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.443761] ffff888015822d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.444623] >ffff888015822d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.445480] ^ [ 30.446279] ffff888015822e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.447153] ffff888015822e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.448005] ================================================================== [ 30.448914] Disabling lock debugging due to kernel taint [ 32.438782] BUG: Bad rss-counter state mm:00000000c15c994a type:MM_FILEPAGES val:33 [ 32.439756] BUG: Bad rss-counter state mm:00000000c15c994a type:MM_ANONPAGES val:22 [ 32.870099] BUG: Bad rss-counter state mm:0000000053b92d92 type:MM_FILEPAGES val:33 [ 32.871308] BUG: Bad rss-counter state mm:0000000053b92d92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17648' (ECDSA) to the list of known hosts. 2023/06/20 23:30:39 fuzzer started 2023/06/20 23:30:40 dialing manager at localhost:36067 2023/06/20 23:30:40 checking machine... 2023/06/20 23:30:40 checking revisions... [ 33.510105] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:30:40 testing simple program... [ 33.549254] cgroup: Unknown subsys name 'net' [ 33.589482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000006e RCX=0000000000000006 RDX=ffffed100394cfd4 RSI=00007f72e5fe0908 RDI=ffff88801ca67e98 RBP=00007f72e5fe090e RSP=ffff88801ca67da8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f72e5fe08a0 R13=ffff88801ca67e30 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff845017e3 RFL=00040293 [--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 00007f72e5a2a900 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=00007f72e5fdf650 CR3=0000000016e16000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff856d84a0 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffff8880165f0e88 R14=ffffffff813782f8 R15=ffff8880097ffb80 RIP=ffffffff8180fea8 RFL=00000046 [---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 00007fd0b38ea700 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=00007f2ed6b26dd0 CR3=000000000e37c000 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=2039333a30333a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30333a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000