syzkaller login: [ 30.058791] BUG: Bad rss-counter state mm:000000000f2c4980 type:MM_FILEPAGES val:33 [ 30.060018] BUG: Bad rss-counter state mm:000000000f2c4980 type:MM_ANONPAGES val:22 [ 30.207143] ================================================================== [ 30.208245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.209571] Read of size 8 at addr ffff88801a100310 by task sshd/220 [ 30.210210] [ 30.210377] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.211086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.211868] Call Trace: [ 30.212127] [ 30.212350] dump_stack_lvl+0x91/0xf0 [ 30.212743] print_report+0xcc/0x620 [ 30.213146] ? __virt_addr_valid+0x102/0x340 [ 30.213613] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.214122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.214631] kasan_report+0xbe/0xf0 [ 30.215027] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.215535] vma_interval_tree_remove+0xc75/0xec0 [ 30.216034] vma_prepare+0xc54/0x11a0 [ 30.216431] __split_vma+0x5af/0x950 [ 30.216815] ? __pfx___split_vma+0x10/0x10 [ 30.217243] ? find_held_lock+0x2c/0x110 [ 30.217685] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.218135] ? lock_is_held_type+0x9f/0x120 [ 30.218580] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.219058] ? mtree_range_walk+0x632/0x900 [ 30.219506] ? mas_walk+0x5c7/0x7c0 [ 30.219897] do_vmi_munmap+0x1f1/0x2b0 [ 30.220286] mmap_region+0x1f9/0x2660 [ 30.220667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.221089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.221674] ? __pfx_lock_acquire+0x10/0x10 [ 30.222102] ? __pfx_mmap_region+0x10/0x10 [ 30.222537] ? security_mmap_addr+0x7d/0xa0 [ 30.222978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.223437] do_mmap+0x854/0xf00 [ 30.223798] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.224206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.224665] ksys_mmap_pgoff+0x3af/0x500 [ 30.225089] do_syscall_64+0x3f/0x90 [ 30.225500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.226028] RIP: 0033:0x7f26c5a3ad82 [ 30.226398] 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 [ 30.228170] RSP: 002b:00007ffe0d80eef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.228908] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26c5a3ad82 [ 30.229617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26c4e74000 [ 30.230310] RBP: 00007f26c4e74000 R08: 0000000000000009 R09: 0000000000001000 [ 30.231015] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d2536eec0 [ 30.231707] R13: 00007ffe0d80ef10 R14: 00007ffe0d80ef40 R15: 00007ffe0d80f2a0 [ 30.232400] [ 30.232630] [ 30.232808] Allocated by task 213: [ 30.233168] kasan_save_stack+0x22/0x50 [ 30.233803] kasan_set_track+0x25/0x30 [ 30.234471] __kasan_slab_alloc+0x59/0x70 [ 30.235174] kmem_cache_alloc+0x16b/0x370 [ 30.235886] vm_area_dup+0x20/0x160 [ 30.236494] __split_vma+0x170/0x950 [ 30.237106] split_vma+0xc6/0x110 [ 30.237691] mprotect_fixup+0x8d2/0xb30 [ 30.238365] do_mprotect_pkey+0x87e/0xd40 [ 30.239056] __x64_sys_mprotect+0x78/0xc0 [ 30.239745] do_syscall_64+0x3f/0x90 [ 30.240372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.241221] [ 30.241527] Freed by task 213: [ 30.241850] kasan_save_stack+0x22/0x50 [ 30.242266] kasan_set_track+0x25/0x30 [ 30.242681] kasan_save_free_info+0x2b/0x50 [ 30.243106] __kasan_slab_free+0x10a/0x190 [ 30.243540] kmem_cache_free+0x10d/0x4d0 [ 30.243940] rcu_core+0x8c8/0x2860 [ 30.244291] __do_softirq+0x1b7/0x7d4 [ 30.244682] [ 30.244848] Last potentially related work creation: [ 30.245323] kasan_save_stack+0x22/0x50 [ 30.245719] __kasan_record_aux_stack+0x8e/0xa0 [ 30.246194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.246722] remove_vma+0x139/0x170 [ 30.247088] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.247534] do_vmi_munmap+0x1f1/0x2b0 [ 30.247926] __vm_munmap+0x138/0x3a0 [ 30.248299] __x64_sys_munmap+0x59/0x80 [ 30.248711] do_syscall_64+0x3f/0x90 [ 30.249093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.249658] [ 30.249829] The buggy address belongs to the object at ffff88801a1002b8 [ 30.249829] which belongs to the cache vm_area_struct of size 168 [ 30.251099] The buggy address is located 88 bytes inside of [ 30.251099] freed 168-byte region [ffff88801a1002b8, ffff88801a100360) [ 30.252256] [ 30.252431] The buggy address belongs to the physical page: [ 30.252977] page:000000001d4ca8a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a100 [ 30.253906] memcg:ffff8880140b7301 [ 30.254245] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.254750] page_type: 0xffffffff() [ 30.255103] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.255840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140b7301 [ 30.256566] page dumped because: kasan: bad access detected [ 30.257086] [ 30.257255] Memory state around the buggy address: [ 30.257725] ffff88801a100200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.258414] ffff88801a100280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.259106] >ffff88801a100300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.259795] ^ [ 30.260170] ffff88801a100380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.260849] ffff88801a100400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.261545] ================================================================== [ 30.262360] Disabling lock debugging due to kernel taint [ 32.268151] BUG: Bad rss-counter state mm:0000000024ad16eb type:MM_FILEPAGES val:33 [ 32.269175] BUG: Bad rss-counter state mm:0000000024ad16eb type:MM_ANONPAGES val:22 [ 32.691954] BUG: Bad rss-counter state mm:000000007dc70956 type:MM_FILEPAGES val:33 [ 32.692896] BUG: Bad rss-counter state mm:000000007dc70956 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32114' (ECDSA) to the list of known hosts. 2023/06/20 16:31:17 fuzzer started 2023/06/20 16:31:17 dialing manager at localhost:36067 2023/06/20 16:31:17 checking machine... 2023/06/20 16:31:17 checking revisions... [ 33.362483] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:31:17 testing simple program... [ 33.408779] cgroup: Unknown subsys name 'net' [ 33.470515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:31:17 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=00000000000080c6 RDI=ffff888015ad78c8 RBP=ffff888015ad7920 RSP=ffff888015ad7858 R8 =ffffffff860d825a R9 =ffff888015ad7908 R10=0000000000038001 R11=0000000000010b8d R12=ffff888015ad7928 R13=ffff888015ad7910 R14=ffff888015ad7909 R15=ffff888015ad78c8 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f53b33b5900 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=00007f53b396c618 CR3=0000000016646000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f41e73d89d0 CR3=000000000ca34000 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=2037313a31333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000