syzkaller login: [ 31.244980] BUG: Bad rss-counter state mm:00000000cf50580e type:MM_FILEPAGES val:33 [ 31.246349] BUG: Bad rss-counter state mm:00000000cf50580e type:MM_ANONPAGES val:22 [ 31.410609] ================================================================== [ 31.411737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.413004] Read of size 8 at addr ffff8880143d7c20 by task sshd/221 [ 31.413843] [ 31.414067] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.414989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.415986] Call Trace: [ 31.416378] [ 31.416773] dump_stack_lvl+0x91/0xf0 [ 31.417472] print_report+0xcc/0x620 [ 31.418157] ? __virt_addr_valid+0x102/0x340 [ 31.418953] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419814] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420699] kasan_report+0xbe/0xf0 [ 31.421377] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.422131] vma_interval_tree_remove+0xc75/0xec0 [ 31.422770] vma_prepare+0xc54/0x11a0 [ 31.423293] __split_vma+0x5af/0x950 [ 31.423796] ? __pfx___split_vma+0x10/0x10 [ 31.424346] ? find_held_lock+0x2c/0x110 [ 31.424903] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.425509] ? lock_is_held_type+0x9f/0x120 [ 31.426065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.426714] ? mtree_range_walk+0x632/0x900 [ 31.427297] ? mas_walk+0x5c7/0x7c0 [ 31.427804] do_vmi_munmap+0x1f1/0x2b0 [ 31.428318] mmap_region+0x1f9/0x2660 [ 31.428834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.429386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.430146] ? __pfx_lock_acquire+0x10/0x10 [ 31.430719] ? __pfx_mmap_region+0x10/0x10 [ 31.431290] ? security_mmap_addr+0x7d/0xa0 [ 31.431849] ? get_unmapped_area+0x1f5/0x3f0 [ 31.432438] do_mmap+0x854/0xf00 [ 31.432885] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.433434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.434023] ksys_mmap_pgoff+0x3af/0x500 [ 31.434569] do_syscall_64+0x3f/0x90 [ 31.435088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435773] RIP: 0033:0x7f72abaccd82 [ 31.436252] 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 [ 31.438522] RSP: 002b:00007ffc45f747d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.439498] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72abaccd82 [ 31.440393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72aaf06000 [ 31.441277] RBP: 00007f72aaf06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.442176] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607b221fec0 [ 31.443084] R13: 00007ffc45f747f0 R14: 00007ffc45f74820 R15: 00007ffc45f74b80 [ 31.443962] [ 31.444251] [ 31.444481] Allocated by task 214: [ 31.444910] kasan_save_stack+0x22/0x50 [ 31.445441] kasan_set_track+0x25/0x30 [ 31.445935] __kasan_slab_alloc+0x59/0x70 [ 31.446471] kmem_cache_alloc+0x16b/0x370 [ 31.447006] vm_area_dup+0x20/0x160 [ 31.447474] __split_vma+0x170/0x950 [ 31.447938] split_vma+0xc6/0x110 [ 31.448396] mprotect_fixup+0x8d2/0xb30 [ 31.448909] do_mprotect_pkey+0x87e/0xd40 [ 31.449453] __x64_sys_mprotect+0x78/0xc0 [ 31.449983] do_syscall_64+0x3f/0x90 [ 31.450474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.451131] [ 31.451355] Freed by task 214: [ 31.451762] kasan_save_stack+0x22/0x50 [ 31.452271] kasan_set_track+0x25/0x30 [ 31.452794] kasan_save_free_info+0x2b/0x50 [ 31.453336] __kasan_slab_free+0x10a/0x190 [ 31.453912] kmem_cache_free+0x10d/0x4d0 [ 31.454465] rcu_core+0x8c8/0x2860 [ 31.454963] __do_softirq+0x1b7/0x7d4 [ 31.455480] [ 31.455707] Last potentially related work creation: [ 31.456331] kasan_save_stack+0x22/0x50 [ 31.456875] __kasan_record_aux_stack+0x8e/0xa0 [ 31.457506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.458182] remove_vma+0x139/0x170 [ 31.458682] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.459277] do_vmi_munmap+0x1f1/0x2b0 [ 31.459794] __vm_munmap+0x138/0x3a0 [ 31.460281] __x64_sys_munmap+0x59/0x80 [ 31.460817] do_syscall_64+0x3f/0x90 [ 31.461309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.462006] [ 31.462231] The buggy address belongs to the object at ffff8880143d7bc8 [ 31.462231] which belongs to the cache vm_area_struct of size 168 [ 31.463809] The buggy address is located 88 bytes inside of [ 31.463809] freed 168-byte region [ffff8880143d7bc8, ffff8880143d7c70) [ 31.465298] [ 31.465547] The buggy address belongs to the physical page: [ 31.466242] page:000000005a0b684f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x143d7 [ 31.467451] memcg:ffff888018c48001 [ 31.467899] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.468593] page_type: 0xffffffff() [ 31.469063] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.470049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c48001 [ 31.471035] page dumped because: kasan: bad access detected [ 31.471739] [ 31.471966] Memory state around the buggy address: [ 31.472592] ffff8880143d7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.473516] ffff8880143d7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.474425] >ffff8880143d7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.475356] ^ [ 31.475907] ffff8880143d7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.476825] ffff8880143d7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.477755] ================================================================== [ 31.478886] Disabling lock debugging due to kernel taint [ 33.413793] BUG: Bad rss-counter state mm:00000000912eb65e type:MM_FILEPAGES val:33 [ 33.414788] BUG: Bad rss-counter state mm:00000000912eb65e type:MM_ANONPAGES val:22 [ 33.879410] BUG: Bad rss-counter state mm:00000000cc103a8a type:MM_FILEPAGES val:33 [ 33.880466] BUG: Bad rss-counter state mm:00000000cc103a8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11772' (ECDSA) to the list of known hosts. 2023/06/19 16:12:22 fuzzer started 2023/06/19 16:12:22 dialing manager at localhost:44161 2023/06/19 16:12:22 checking machine... 2023/06/19 16:12:22 checking revisions... [ 34.548586] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:12:22 testing simple program... [ 34.593145] cgroup: Unknown subsys name 'net' [ 34.655414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffff8880165d7a48 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff8880165d79a8 RBP=ffff8880165d7a40 RSP=ffff8880165d79a0 R8 =0000000000000001 R9 =ffff8880165d79e8 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880165d7a70 R13=0000000000000000 R14=ffff88800dab51c0 R15=0000000000000cc0 RIP=ffffffff811305d0 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 00007f83a4949900 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=00007f83a4efe650 CR3=000000000efb8000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffef0561958 CR3=000000000911c000 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=2032323a32313a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000