syzkaller login: [ 31.087856] BUG: Bad rss-counter state mm:000000004864b595 type:MM_FILEPAGES val:33 [ 31.088832] BUG: Bad rss-counter state mm:000000004864b595 type:MM_ANONPAGES val:22 [ 31.244713] ================================================================== [ 31.245655] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.246601] Read of size 8 at addr ffff88801a2ee3f8 by task sshd/220 [ 31.247383] [ 31.247602] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.248613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.249621] Call Trace: [ 31.249940] [ 31.250227] dump_stack_lvl+0x91/0xf0 [ 31.250742] print_report+0xcc/0x620 [ 31.251233] ? __virt_addr_valid+0x102/0x340 [ 31.251798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253059] kasan_report+0xbe/0xf0 [ 31.253555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254176] vma_interval_tree_remove+0xc75/0xec0 [ 31.254789] vma_prepare+0xc54/0x11a0 [ 31.255264] __split_vma+0x5af/0x950 [ 31.255730] ? __pfx___split_vma+0x10/0x10 [ 31.256255] ? find_held_lock+0x2c/0x110 [ 31.256779] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.257337] ? lock_is_held_type+0x9f/0x120 [ 31.257875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258472] ? mtree_range_walk+0x632/0x900 [ 31.259019] ? mas_walk+0x5c7/0x7c0 [ 31.259486] do_vmi_munmap+0x1f1/0x2b0 [ 31.259974] mmap_region+0x1f9/0x2660 [ 31.260452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.260964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.261699] ? __pfx_lock_acquire+0x10/0x10 [ 31.262232] ? __pfx_mmap_region+0x10/0x10 [ 31.262754] ? security_mmap_addr+0x7d/0xa0 [ 31.263276] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263824] do_mmap+0x854/0xf00 [ 31.264264] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265347] ksys_mmap_pgoff+0x3af/0x500 [ 31.265868] do_syscall_64+0x3f/0x90 [ 31.266355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267008] RIP: 0033:0x7fb70afaed82 [ 31.267468] 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 [ 31.269596] RSP: 002b:00007fff53303f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb70afaed82 [ 31.271353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb70a3e8000 [ 31.272197] RBP: 00007fb70a3e8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273045] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a562b72d90 [ 31.273902] R13: 00007fff53303f80 R14: 00007fff53303fb0 R15: 00007fff53304310 [ 31.274755] [ 31.275045] [ 31.275263] Allocated by task 213: [ 31.275690] kasan_save_stack+0x22/0x50 [ 31.276194] kasan_set_track+0x25/0x30 [ 31.276691] __kasan_slab_alloc+0x59/0x70 [ 31.277231] kmem_cache_alloc+0x16b/0x370 [ 31.277751] vm_area_dup+0x20/0x160 [ 31.278199] __split_vma+0x170/0x950 [ 31.278659] split_vma+0xc6/0x110 [ 31.279099] mprotect_fixup+0x8d2/0xb30 [ 31.279605] do_mprotect_pkey+0x87e/0xd40 [ 31.280129] __x64_sys_mprotect+0x78/0xc0 [ 31.280658] do_syscall_64+0x3f/0x90 [ 31.281140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281777] [ 31.281994] Freed by task 213: [ 31.282385] kasan_save_stack+0x22/0x50 [ 31.282890] kasan_set_track+0x25/0x30 [ 31.283381] kasan_save_free_info+0x2b/0x50 [ 31.283918] __kasan_slab_free+0x10a/0x190 [ 31.284452] kmem_cache_free+0x10d/0x4d0 [ 31.284960] rcu_core+0x8c8/0x2860 [ 31.285432] __do_softirq+0x1b7/0x7d4 [ 31.285909] [ 31.286127] Last potentially related work creation: [ 31.286703] kasan_save_stack+0x22/0x50 [ 31.287208] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288426] remove_vma+0x139/0x170 [ 31.288881] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289493] do_vmi_munmap+0x1f1/0x2b0 [ 31.289976] __vm_munmap+0x138/0x3a0 [ 31.290441] __x64_sys_munmap+0x59/0x80 [ 31.290934] do_syscall_64+0x3f/0x90 [ 31.291406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292041] [ 31.292256] The buggy address belongs to the object at ffff88801a2ee3a0 [ 31.292256] which belongs to the cache vm_area_struct of size 168 [ 31.293753] The buggy address is located 88 bytes inside of [ 31.293753] freed 168-byte region [ffff88801a2ee3a0, ffff88801a2ee448) [ 31.295154] [ 31.295369] The buggy address belongs to the physical page: [ 31.296030] page:00000000ac26075a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ee [ 31.297133] memcg:ffff888013abe101 [ 31.297558] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298201] page_type: 0xffffffff() [ 31.298647] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.299550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013abe101 [ 31.300452] page dumped because: kasan: bad access detected [ 31.301119] [ 31.301336] Memory state around the buggy address: [ 31.301921] ffff88801a2ee280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.302767] ffff88801a2ee300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.303616] >ffff88801a2ee380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.304464] ^ [ 31.305323] ffff88801a2ee400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.306182] ffff88801a2ee480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.307024] ================================================================== [ 31.307953] Disabling lock debugging due to kernel taint [ 33.268972] BUG: Bad rss-counter state mm:000000004df9ae03 type:MM_FILEPAGES val:33 [ 33.270096] BUG: Bad rss-counter state mm:000000004df9ae03 type:MM_ANONPAGES val:22 [ 33.787272] BUG: Bad rss-counter state mm:000000006ca193f9 type:MM_FILEPAGES val:33 [ 33.788475] BUG: Bad rss-counter state mm:000000006ca193f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4948' (ECDSA) to the list of known hosts. 2023/06/21 01:28:53 fuzzer started 2023/06/21 01:28:53 dialing manager at localhost:36067 2023/06/21 01:28:53 checking machine... 2023/06/21 01:28:53 checking revisions... [ 34.439224] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:28:53 testing simple program... [ 34.490245] cgroup: Unknown subsys name 'net' [ 34.546481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000fe0 RCX=ffffffff8226f502 RDX=ffff88800e7ad1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=00007ffffffff000 RSP=ffff88800d8d7d18 R8 =0000000000000006 R9 =000055dbeba673f0 R10=00007ffffffff000 R11=00000000000b6a61 R12=000055dbeba673f0 R13=ffff8880158c8020 R14=ffff8880158c8020 R15=ffffffff85d3e300 RIP=ffffffff814c0864 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 00007f290da1d900 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=00007f290ce2a240 CR3=000000000ff8e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=11d2891c456c41dd00000000000ae988 XMM05=7d47a8c7d00fc09b0000000000132510 XMM06=19e9129bd510f2350000000000131370 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ddfe780 RCX=0000000000000000 RDX=1ffff11001bbfd26 RSI=ffffffff83633270 RDI=ffff88800ddfe930 RBP=ffff88800ddfe780 RSP=ffff88800f677da8 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800ddfe780 R11=0000000000000000 R12=ffff88800f677e18 R13=ffff88800f677e08 R14=0000000000000000 R15=ffff8880199acac0 RIP=ffffffff814c0860 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 00007fc055b5a900 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=00007fc056111618 CR3=0000000019f7e000 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=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