syzkaller login: [ 45.603651] BUG: Bad rss-counter state mm:000000004275d199 type:MM_FILEPAGES val:33 [ 45.605089] BUG: Bad rss-counter state mm:000000004275d199 type:MM_ANONPAGES val:22 [ 45.751390] ================================================================== [ 45.752494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.753601] Read of size 8 at addr ffff88800ea5d6b0 by task sshd/220 [ 45.754668] [ 45.754913] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.755817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.756893] Call Trace: [ 45.757230] [ 45.757531] dump_stack_lvl+0x91/0xf0 [ 45.758040] print_report+0xcc/0x620 [ 45.758510] ? __virt_addr_valid+0x102/0x340 [ 45.759070] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.759723] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.760386] kasan_report+0xbe/0xf0 [ 45.760894] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.761549] vma_interval_tree_remove+0xc75/0xec0 [ 45.762170] vma_prepare+0xc54/0x11a0 [ 45.762638] __split_vma+0x5af/0x950 [ 45.763124] ? __pfx___split_vma+0x10/0x10 [ 45.763685] ? find_held_lock+0x2c/0x110 [ 45.764240] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.764871] ? lock_is_held_type+0x9f/0x120 [ 45.765447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.766093] ? mtree_range_walk+0x632/0x900 [ 45.766683] ? mas_walk+0x5c7/0x7c0 [ 45.767169] do_vmi_munmap+0x1f1/0x2b0 [ 45.767653] mmap_region+0x1f9/0x2660 [ 45.768153] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.768707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.769461] ? __pfx_lock_acquire+0x10/0x10 [ 45.770028] ? __pfx_mmap_region+0x10/0x10 [ 45.770597] ? security_mmap_addr+0x7d/0xa0 [ 45.771146] ? get_unmapped_area+0x1f5/0x3f0 [ 45.771682] do_mmap+0x854/0xf00 [ 45.772140] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.772689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.773296] ksys_mmap_pgoff+0x3af/0x500 [ 45.773840] do_syscall_64+0x3f/0x90 [ 45.774352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.775042] RIP: 0033:0x7f65cbd3bd82 [ 45.775531] 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 [ 45.777846] RSP: 002b:00007ffe006e9458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.778825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65cbd3bd82 [ 45.779676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65cb175000 [ 45.780582] RBP: 00007f65cb175000 R08: 0000000000000009 R09: 0000000000001000 [ 45.781511] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7c87eeec0 [ 45.782382] R13: 00007ffe006e9470 R14: 00007ffe006e94a0 R15: 00007ffe006e9800 [ 45.783225] [ 45.783521] [ 45.783732] Allocated by task 213: [ 45.784162] kasan_save_stack+0x22/0x50 [ 45.784686] kasan_set_track+0x25/0x30 [ 45.785184] __kasan_slab_alloc+0x59/0x70 [ 45.785718] kmem_cache_alloc+0x16b/0x370 [ 45.786237] vm_area_dup+0x20/0x160 [ 45.786694] __split_vma+0x170/0x950 [ 45.787168] split_vma+0xc6/0x110 [ 45.787610] mprotect_fixup+0x8d2/0xb30 [ 45.788119] do_mprotect_pkey+0x87e/0xd40 [ 45.788648] __x64_sys_mprotect+0x78/0xc0 [ 45.789171] do_syscall_64+0x3f/0x90 [ 45.789653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.790296] [ 45.790513] Freed by task 213: [ 45.790909] kasan_save_stack+0x22/0x50 [ 45.791421] kasan_set_track+0x25/0x30 [ 45.791923] kasan_save_free_info+0x2b/0x50 [ 45.792570] __kasan_slab_free+0x10a/0x190 [ 45.793166] kmem_cache_free+0x10d/0x4d0 [ 45.793682] rcu_core+0x8c8/0x2860 [ 45.794133] __do_softirq+0x1b7/0x7d4 [ 45.794615] [ 45.794889] Last potentially related work creation: [ 45.795492] kasan_save_stack+0x22/0x50 [ 45.796001] __kasan_record_aux_stack+0x8e/0xa0 [ 45.796590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.797234] remove_vma+0x139/0x170 [ 45.797698] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.798258] do_vmi_munmap+0x1f1/0x2b0 [ 45.798749] __vm_munmap+0x138/0x3a0 [ 45.799277] __x64_sys_munmap+0x59/0x80 [ 45.799863] do_syscall_64+0x3f/0x90 [ 45.800378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.801027] [ 45.801243] The buggy address belongs to the object at ffff88800ea5d658 [ 45.801243] which belongs to the cache vm_area_struct of size 168 [ 45.802721] The buggy address is located 88 bytes inside of [ 45.802721] freed 168-byte region [ffff88800ea5d658, ffff88800ea5d700) [ 45.804139] [ 45.804363] The buggy address belongs to the physical page: [ 45.805033] page:0000000043df256f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea5d [ 45.806124] memcg:ffff88800c78be01 [ 45.806555] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.807262] page_type: 0xffffffff() [ 45.807731] raw: 0100000000000200 ffff88800879fc80 ffffea0000356dc0 dead000000000007 [ 45.808680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c78be01 [ 45.809592] page dumped because: kasan: bad access detected [ 45.810266] [ 45.810481] Memory state around the buggy address: [ 45.811064] ffff88800ea5d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.811921] ffff88800ea5d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 45.812791] >ffff88800ea5d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.813646] ^ [ 45.814230] ffff88800ea5d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 45.815088] ffff88800ea5d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 45.815941] ================================================================== [ 45.816888] Disabling lock debugging due to kernel taint [ 48.156257] BUG: Bad rss-counter state mm:0000000080a62a06 type:MM_FILEPAGES val:33 [ 48.157225] BUG: Bad rss-counter state mm:0000000080a62a06 type:MM_ANONPAGES val:22 [ 48.695232] BUG: Bad rss-counter state mm:0000000001c0d478 type:MM_FILEPAGES val:33 [ 48.696237] BUG: Bad rss-counter state mm:0000000001c0d478 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7780' (ECDSA) to the list of known hosts. 2023/06/19 21:02:30 fuzzer started 2023/06/19 21:02:30 dialing manager at localhost:44161 2023/06/19 21:02:30 checking machine... 2023/06/19 21:02:30 checking revisions... [ 49.325535] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:02:31 testing simple program... [ 49.374685] cgroup: Unknown subsys name 'net' [ 49.410129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800da1f580 RCX=0000000000000001 RDX=1ffff11001b43ebb RSI=ffff88800da1ff18 RDI=ffffffff84506c7f RBP=ffff88800da1f5d8 RSP=ffff88800da1f568 R8 =0000000000000001 R9 =ffff88800da1f5c0 R10=0000000000038001 R11=000000000008abed R12=ffff88800da1f648 R13=0000000000000000 R14=ffff888015d70000 R15=0000000000000014 RIP=ffffffff811303b2 RFL=00000246 [---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 00007f1931213900 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=00007ffecc528000 CR3=000000001967a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f863738ef50 CR3=000000000e57a000 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=2030333a32303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000