syzkaller login: [ 30.399005] BUG: Bad rss-counter state mm:0000000022b5a6ab type:MM_FILEPAGES val:33 [ 30.400069] BUG: Bad rss-counter state mm:0000000022b5a6ab type:MM_ANONPAGES val:22 [ 30.446451] ================================================================== [ 30.447441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.448370] Read of size 8 at addr ffff88801654c798 by task sshd/220 [ 30.449164] [ 30.449378] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.450283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.451198] Call Trace: [ 30.451502] [ 30.451772] dump_stack_lvl+0x91/0xf0 [ 30.452239] print_report+0xcc/0x620 [ 30.452700] ? __virt_addr_valid+0x102/0x340 [ 30.453226] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.454438] kasan_report+0xbe/0xf0 [ 30.454910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455535] vma_interval_tree_remove+0xc75/0xec0 [ 30.456117] vma_prepare+0xc54/0x11a0 [ 30.456589] __split_vma+0x5af/0x950 [ 30.457057] ? __pfx___split_vma+0x10/0x10 [ 30.457585] ? find_held_lock+0x2c/0x110 [ 30.458097] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.458667] ? lock_is_held_type+0x9f/0x120 [ 30.459187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.459771] ? mtree_range_walk+0x632/0x900 [ 30.460311] ? mas_walk+0x5c7/0x7c0 [ 30.460783] do_vmi_munmap+0x1f1/0x2b0 [ 30.461282] mmap_region+0x1f9/0x2660 [ 30.461763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.462274] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.462986] ? __pfx_lock_acquire+0x10/0x10 [ 30.463514] ? __pfx_mmap_region+0x10/0x10 [ 30.464041] ? security_mmap_addr+0x7d/0xa0 [ 30.464571] ? get_unmapped_area+0x1f5/0x3f0 [ 30.465138] do_mmap+0x854/0xf00 [ 30.465574] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.466058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.466624] ksys_mmap_pgoff+0x3af/0x500 [ 30.467124] do_syscall_64+0x3f/0x90 [ 30.467613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.468252] RIP: 0033:0x7f1d80a63d82 [ 30.468705] 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 [ 30.470831] RSP: 002b:00007ffe6c8c45d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.471733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d80a63d82 [ 30.472738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d7fe9d000 [ 30.473572] RBP: 00007f1d7fe9d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.474410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556541ed1ec0 [ 30.475264] R13: 00007ffe6c8c45f0 R14: 00007ffe6c8c4620 R15: 00007ffe6c8c4980 [ 30.476119] [ 30.476409] [ 30.476618] Allocated by task 213: [ 30.477048] kasan_save_stack+0x22/0x50 [ 30.477553] kasan_set_track+0x25/0x30 [ 30.478041] __kasan_slab_alloc+0x59/0x70 [ 30.478554] kmem_cache_alloc+0x16b/0x370 [ 30.479071] vm_area_dup+0x20/0x160 [ 30.479528] __split_vma+0x170/0x950 [ 30.479988] split_vma+0xc6/0x110 [ 30.480412] mprotect_fixup+0x8d2/0xb30 [ 30.480907] do_mprotect_pkey+0x87e/0xd40 [ 30.481439] __x64_sys_mprotect+0x78/0xc0 [ 30.481966] do_syscall_64+0x3f/0x90 [ 30.482438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.483086] [ 30.483304] Freed by task 213: [ 30.483697] kasan_save_stack+0x22/0x50 [ 30.484189] kasan_set_track+0x25/0x30 [ 30.484675] kasan_save_free_info+0x2b/0x50 [ 30.485216] __kasan_slab_free+0x10a/0x190 [ 30.485744] kmem_cache_free+0x10d/0x4d0 [ 30.486252] rcu_core+0x8c8/0x2860 [ 30.486689] __do_softirq+0x1b7/0x7d4 [ 30.487163] [ 30.487371] Last potentially related work creation: [ 30.487960] kasan_save_stack+0x22/0x50 [ 30.488460] __kasan_record_aux_stack+0x8e/0xa0 [ 30.489024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.489696] remove_vma+0x139/0x170 [ 30.490144] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.490689] do_vmi_munmap+0x1f1/0x2b0 [ 30.491179] __vm_munmap+0x138/0x3a0 [ 30.491633] __x64_sys_munmap+0x59/0x80 [ 30.492128] do_syscall_64+0x3f/0x90 [ 30.492606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.493246] [ 30.493460] The buggy address belongs to the object at ffff88801654c740 [ 30.493460] which belongs to the cache vm_area_struct of size 168 [ 30.494931] The buggy address is located 88 bytes inside of [ 30.494931] freed 168-byte region [ffff88801654c740, ffff88801654c7e8) [ 30.496350] [ 30.496561] The buggy address belongs to the physical page: [ 30.497219] page:0000000002b8e706 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801654c1d0 pfn:0x1654c [ 30.498448] memcg:ffff88800e859501 [ 30.498870] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.499563] page_type: 0xffffffff() [ 30.500005] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.500921] raw: ffff88801654c1d0 000000008011000e 00000001ffffffff ffff88800e859501 [ 30.501847] page dumped because: kasan: bad access detected [ 30.502493] [ 30.502711] Memory state around the buggy address: [ 30.503291] ffff88801654c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.504136] ffff88801654c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.504974] >ffff88801654c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.505810] ^ [ 30.506301] ffff88801654c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.507142] ffff88801654c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.507985] ================================================================== [ 30.508892] Disabling lock debugging due to kernel taint [ 33.245336] BUG: Bad rss-counter state mm:00000000b6d222ce type:MM_FILEPAGES val:33 [ 33.246506] BUG: Bad rss-counter state mm:00000000b6d222ce type:MM_ANONPAGES val:22 [ 33.734124] BUG: Bad rss-counter state mm:00000000b3560265 type:MM_FILEPAGES val:33 [ 33.735303] BUG: Bad rss-counter state mm:00000000b3560265 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53865' (ECDSA) to the list of known hosts. 2023/06/21 01:14:32 fuzzer started 2023/06/21 01:14:32 dialing manager at localhost:36067 2023/06/21 01:14:32 checking machine... 2023/06/21 01:14:32 checking revisions... [ 34.367812] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:14:33 testing simple program... [ 34.426714] cgroup: Unknown subsys name 'net' [ 34.500355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad470 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3d350 RBP=ffff888016457790 RSP=ffff8880164576f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880164577c0 R13=0000000000000000 R14=ffff888016f51b40 R15=0000000000000dc0 RIP=ffffffff810bd082 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 00007f994078f900 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=00007f9940d470b0 CR3=000000000e6a0000 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=ffffffff8118ddc3 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff8118ddc3 RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800da98000 RIP=ffffffff813ad470 RFL=00000286 [--S--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 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=00007f67ad1df7a0 CR3=000000000d8d4000 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=8c726e7da68680b7e64895fbc706c219 XMM02=000000000011b3d0eff9b2d0a8fce9cb XMM03=000000000011b4a02c67c8bc2e329bc3 XMM04=3b8b17bcb80bd1d700000000000ae988 XMM05=19e9129bd510f2350000000000132048 XMM06=4fda316b135da52b0000000000131ed0 XMM07=e042d86d42eb936e00000000001223e8 XMM08=eed3a9f521f8cf0a000000000011b4a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000