syzkaller login: [ 36.756423] BUG: Bad rss-counter state mm:00000000d465b37e type:MM_FILEPAGES val:33 [ 36.757230] BUG: Bad rss-counter state mm:00000000d465b37e type:MM_ANONPAGES val:22 [ 36.882984] ================================================================== [ 36.883688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.884435] Read of size 8 at addr ffff88801a0816b0 by task sshd/220 [ 36.885033] [ 36.885200] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.885987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.886756] Call Trace: [ 36.887004] <TASK> [ 36.887225] dump_stack_lvl+0x91/0xf0 [ 36.887610] print_report+0xcc/0x620 [ 36.887999] ? __virt_addr_valid+0x102/0x340 [ 36.888434] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.888894] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.889356] kasan_report+0xbe/0xf0 [ 36.889713] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.890199] vma_interval_tree_remove+0xc75/0xec0 [ 36.890673] vma_prepare+0xc54/0x11a0 [ 36.891025] __split_vma+0x5af/0x950 [ 36.891367] ? __pfx___split_vma+0x10/0x10 [ 36.891748] ? find_held_lock+0x2c/0x110 [ 36.892121] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.892531] ? lock_is_held_type+0x9f/0x120 [ 36.892922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.893360] ? mtree_range_walk+0x632/0x900 [ 36.893761] ? mas_walk+0x5c7/0x7c0 [ 36.894109] do_vmi_munmap+0x1f1/0x2b0 [ 36.894466] mmap_region+0x1f9/0x2660 [ 36.894822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.895204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.895731] ? __pfx_lock_acquire+0x10/0x10 [ 36.896115] ? __pfx_mmap_region+0x10/0x10 [ 36.896493] ? security_mmap_addr+0x7d/0xa0 [ 36.896876] ? get_unmapped_area+0x1f5/0x3f0 [ 36.897269] do_mmap+0x854/0xf00 [ 36.897587] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.897952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.898355] ksys_mmap_pgoff+0x3af/0x500 [ 36.898720] do_syscall_64+0x3f/0x90 [ 36.899061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.899525] RIP: 0033:0x7fe156450d82 [ 36.899855] 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 [ 36.901393] RSP: 002b:00007ffeaca83088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.902064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe156450d82 [ 36.902673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe15588a000 [ 36.903278] RBP: 00007fe15588a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.903882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055632addaec0 [ 36.904534] R13: 00007ffeaca830a0 R14: 00007ffeaca830d0 R15: 00007ffeaca83430 [ 36.905322] </TASK> [ 36.905595] [ 36.905794] Allocated by task 213: [ 36.906204] kasan_save_stack+0x22/0x50 [ 36.906657] kasan_set_track+0x25/0x30 [ 36.907100] __kasan_slab_alloc+0x59/0x70 [ 36.907483] kmem_cache_alloc+0x16b/0x370 [ 36.907868] vm_area_dup+0x20/0x160 [ 36.908192] __split_vma+0x170/0x950 [ 36.908540] split_vma+0xc6/0x110 [ 36.908854] mprotect_fixup+0x8d2/0xb30 [ 36.909213] do_mprotect_pkey+0x87e/0xd40 [ 36.909610] __x64_sys_mprotect+0x78/0xc0 [ 36.910008] do_syscall_64+0x3f/0x90 [ 36.910343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.910819] [ 36.910974] Freed by task 213: [ 36.911258] kasan_save_stack+0x22/0x50 [ 36.911666] kasan_set_track+0x25/0x30 [ 36.912056] kasan_save_free_info+0x2b/0x50 [ 36.912450] __kasan_slab_free+0x10a/0x190 [ 36.912838] kmem_cache_free+0x10d/0x4d0 [ 36.913205] rcu_core+0x8c8/0x2860 [ 36.913524] __do_softirq+0x1b7/0x7d4 [ 36.913871] [ 36.914036] Last potentially related work creation: [ 36.914468] kasan_save_stack+0x22/0x50 [ 36.914831] __kasan_record_aux_stack+0x8e/0xa0 [ 36.915244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.915713] remove_vma+0x139/0x170 [ 36.916041] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.916448] do_vmi_munmap+0x1f1/0x2b0 [ 36.916797] __vm_munmap+0x138/0x3a0 [ 36.917133] __x64_sys_munmap+0x59/0x80 [ 36.917494] do_syscall_64+0x3f/0x90 [ 36.917833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.918305] [ 36.918458] The buggy address belongs to the object at ffff88801a081658 [ 36.918458] which belongs to the cache vm_area_struct of size 168 [ 36.919520] The buggy address is located 88 bytes inside of [ 36.919520] freed 168-byte region [ffff88801a081658, ffff88801a081700) [ 36.920539] [ 36.920692] The buggy address belongs to the physical page: [ 36.921175] page:0000000061ea47b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a081 [ 36.921990] memcg:ffff88801440db01 [ 36.922301] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.922766] page_type: 0xffffffff() [ 36.923092] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.923767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801440db01 [ 36.924428] page dumped because: kasan: bad access detected [ 36.924909] [ 36.925065] Memory state around the buggy address: [ 36.925492] ffff88801a081580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.926151] ffff88801a081600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.926788] >ffff88801a081680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.927411] ^ [ 36.927847] ffff88801a081700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.928474] ffff88801a081780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.929101] ================================================================== [ 36.929835] Disabling lock debugging due to kernel taint [ 39.552987] BUG: Bad rss-counter state mm:00000000d53dafa8 type:MM_FILEPAGES val:33 [ 39.554184] BUG: Bad rss-counter state mm:00000000d53dafa8 type:MM_ANONPAGES val:22 [ 39.952750] BUG: Bad rss-counter state mm:000000006e5bc7fe type:MM_FILEPAGES val:33 [ 39.953700] BUG: Bad rss-counter state mm:000000006e5bc7fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35816' (ECDSA) to the list of known hosts. 2023/06/20 07:01:48 fuzzer started 2023/06/20 07:01:48 dialing manager at localhost:44161 2023/06/20 07:01:48 checking machine... 2023/06/20 07:01:48 checking revisions... [ 40.746436] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:01:48 testing simple program... [ 40.801428] cgroup: Unknown subsys name 'net' [ 40.839889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:01:42 Registers: info registers vcpu 0 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800f2e0000 RSP=ffff888009fdf7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001e5c001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--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 0000000000000000 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=00007f0cd0839650 CR3=0000000019c7e000 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=0000000000000000 RBX=0000000000057000 RCX=ffffffff81baddd2 RDX=ffff88800a120000 RSI=0000000000000008 RDI=ffffea0000724340 RBP=0000000000000000 RSP=ffff88800a12faf0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000057000 R11=0000000000000128 R12=ffffea0000724340 R13=ffff88801b1702b8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8180fd28 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 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=00007ffc277abf98 CR3=0000000005482000 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=00007f1590014510000055b600e09790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000