syzkaller login: [ 40.641241] BUG: Bad rss-counter state mm:00000000c01de6f7 type:MM_FILEPAGES val:33 [ 40.642675] BUG: Bad rss-counter state mm:00000000c01de6f7 type:MM_ANONPAGES val:22 [ 40.782875] ================================================================== [ 40.783802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.784743] Read of size 8 at addr ffff888017ac1880 by task sshd/226 [ 40.785516] [ 40.785742] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.786800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.787783] Call Trace: [ 40.788104] [ 40.788400] dump_stack_lvl+0x91/0xf0 [ 40.788888] print_report+0xcc/0x620 [ 40.789383] ? __virt_addr_valid+0x102/0x340 [ 40.789976] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.790600] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.791214] kasan_report+0xbe/0xf0 [ 40.791689] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.792304] vma_interval_tree_remove+0xc75/0xec0 [ 40.792904] vma_prepare+0xc54/0x11a0 [ 40.793386] __split_vma+0x5af/0x950 [ 40.793864] ? __pfx___split_vma+0x10/0x10 [ 40.794395] ? find_held_lock+0x2c/0x110 [ 40.794911] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.795476] ? lock_is_held_type+0x9f/0x120 [ 40.796013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.796616] ? mtree_range_walk+0x632/0x900 [ 40.797171] ? mas_walk+0x5c7/0x7c0 [ 40.797687] do_vmi_munmap+0x1f1/0x2b0 [ 40.798204] mmap_region+0x1f9/0x2660 [ 40.798695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.799210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.799922] ? __pfx_lock_acquire+0x10/0x10 [ 40.800452] ? __pfx_mmap_region+0x10/0x10 [ 40.800981] ? security_mmap_addr+0x7d/0xa0 [ 40.801508] ? get_unmapped_area+0x1f5/0x3f0 [ 40.802073] do_mmap+0x854/0xf00 [ 40.802510] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.803002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.803555] ksys_mmap_pgoff+0x3af/0x500 [ 40.804056] do_syscall_64+0x3f/0x90 [ 40.804539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.805178] RIP: 0033:0x7f378122cd82 [ 40.805649] 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 [ 40.807797] RSP: 002b:00007ffd75938a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.808697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f378122cd82 [ 40.809550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3780666000 [ 40.810410] RBP: 00007f3780666000 R08: 0000000000000009 R09: 0000000000001000 [ 40.811244] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfcc6d4ec0 [ 40.812083] R13: 00007ffd75938a50 R14: 00007ffd75938a80 R15: 00007ffd75938de0 [ 40.812936] [ 40.813230] [ 40.813443] Allocated by task 219: [ 40.813874] kasan_save_stack+0x22/0x50 [ 40.814375] kasan_set_track+0x25/0x30 [ 40.814867] __kasan_slab_alloc+0x59/0x70 [ 40.815397] kmem_cache_alloc+0x16b/0x370 [ 40.815912] vm_area_dup+0x20/0x160 [ 40.816366] __split_vma+0x170/0x950 [ 40.816833] split_vma+0xc6/0x110 [ 40.817271] mprotect_fixup+0x8d2/0xb30 [ 40.817788] do_mprotect_pkey+0x87e/0xd40 [ 40.818303] __x64_sys_mprotect+0x78/0xc0 [ 40.818820] do_syscall_64+0x3f/0x90 [ 40.819297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.819935] [ 40.820151] Freed by task 219: [ 40.820546] kasan_save_stack+0x22/0x50 [ 40.821043] kasan_set_track+0x25/0x30 [ 40.821534] kasan_save_free_info+0x2b/0x50 [ 40.822072] __kasan_slab_free+0x10a/0x190 [ 40.822601] kmem_cache_free+0x10d/0x4d0 [ 40.823105] rcu_core+0x8c8/0x2860 [ 40.823546] __do_softirq+0x1b7/0x7d4 [ 40.824019] [ 40.824235] Last potentially related work creation: [ 40.824815] kasan_save_stack+0x22/0x50 [ 40.825320] __kasan_record_aux_stack+0x8e/0xa0 [ 40.825910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.826550] remove_vma+0x139/0x170 [ 40.826996] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.827551] do_vmi_munmap+0x1f1/0x2b0 [ 40.828080] __vm_munmap+0x138/0x3a0 [ 40.828544] __x64_sys_munmap+0x59/0x80 [ 40.829036] do_syscall_64+0x3f/0x90 [ 40.829508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.830158] [ 40.830374] The buggy address belongs to the object at ffff888017ac1828 [ 40.830374] which belongs to the cache vm_area_struct of size 168 [ 40.831830] The buggy address is located 88 bytes inside of [ 40.831830] freed 168-byte region [ffff888017ac1828, ffff888017ac18d0) [ 40.833261] [ 40.833485] The buggy address belongs to the physical page: [ 40.834149] page:0000000050fd0894 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ac1 [ 40.835248] memcg:ffff888013229501 [ 40.835680] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.836338] page_type: 0xffffffff() [ 40.836792] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.837741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013229501 [ 40.838665] page dumped because: kasan: bad access detected [ 40.839332] [ 40.839550] Memory state around the buggy address: [ 40.840132] ffff888017ac1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.841003] ffff888017ac1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.841873] >ffff888017ac1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.842723] ^ [ 40.843138] ffff888017ac1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.843998] ffff888017ac1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.844857] ================================================================== [ 40.845824] Disabling lock debugging due to kernel taint [ 43.290908] BUG: Bad rss-counter state mm:00000000b1c31e52 type:MM_FILEPAGES val:33 [ 43.291959] BUG: Bad rss-counter state mm:00000000b1c31e52 type:MM_ANONPAGES val:22 [ 43.768424] BUG: Bad rss-counter state mm:00000000e523d68b type:MM_FILEPAGES val:33 [ 43.769605] BUG: Bad rss-counter state mm:00000000e523d68b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65285' (ECDSA) to the list of known hosts. 2023/06/19 20:47:49 fuzzer started 2023/06/19 20:47:49 dialing manager at localhost:44161 2023/06/19 20:47:49 checking machine... 2023/06/19 20:47:49 checking revisions... [ 44.522355] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:47:50 testing simple program... [ 44.569431] cgroup: Unknown subsys name 'net' [ 44.617013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c138c RSI=ffffffff83682fb9 RDI=ffff88806ce09b6c RBP=ffff88806ce09c60 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b5ce R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880068ad1c0 R15=ffff88800d6127a0 RIP=ffffffff813ad4f7 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 00007f67148b2900 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=00007f6713ccd820 CR3=000000000c6f4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=59c40ec4db19932000000000000ae988 XMM05=d1c8c29b7a6547f80000000000135850 XMM06=16bbfc4fa606b6250000000000134960 XMM07=fb795ef6d65770560000000000124730 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff852c41f8 RBX=ffff888093d9ba00 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff811430fc RDI=0000000000000006 RBP=ffff888013d9ba00 RSP=ffff88800ff1f890 R8 =0000000000000006 R9 =ffff888013d9ba00 R10=ffff888093d9ba00 R11=00000000000b6996 R12=0000000000000000 R13=ffffea000038d000 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff8114310d 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 00007fbae3591900 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=00007fbae3b48618 CR3=000000000f0c0000 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=563412feff00545000000000000080fe 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