syzkaller login: [ 30.574221] BUG: Bad rss-counter state mm:0000000093afb612 type:MM_FILEPAGES val:33 [ 30.575225] BUG: Bad rss-counter state mm:0000000093afb612 type:MM_ANONPAGES val:22 [ 30.739043] ================================================================== [ 30.739959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740912] Read of size 8 at addr ffff88801a30a6b0 by task sshd/220 [ 30.741684] [ 30.741902] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743916] Call Trace: [ 30.744231] [ 30.744518] dump_stack_lvl+0x91/0xf0 [ 30.745016] print_report+0xcc/0x620 [ 30.745533] ? __virt_addr_valid+0x102/0x340 [ 30.746081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746699] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747305] kasan_report+0xbe/0xf0 [ 30.747785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748405] vma_interval_tree_remove+0xc75/0xec0 [ 30.749005] vma_prepare+0xc54/0x11a0 [ 30.749484] __split_vma+0x5af/0x950 [ 30.749959] ? __pfx___split_vma+0x10/0x10 [ 30.750493] ? find_held_lock+0x2c/0x110 [ 30.751023] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751600] ? lock_is_held_type+0x9f/0x120 [ 30.752138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752746] ? mtree_range_walk+0x632/0x900 [ 30.753297] ? mas_walk+0x5c7/0x7c0 [ 30.753777] do_vmi_munmap+0x1f1/0x2b0 [ 30.754263] mmap_region+0x1f9/0x2660 [ 30.754747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.755960] ? __pfx_lock_acquire+0x10/0x10 [ 30.756497] ? __pfx_mmap_region+0x10/0x10 [ 30.757024] ? security_mmap_addr+0x7d/0xa0 [ 30.757565] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758117] do_mmap+0x854/0xf00 [ 30.758554] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759601] ksys_mmap_pgoff+0x3af/0x500 [ 30.760109] do_syscall_64+0x3f/0x90 [ 30.760591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761234] RIP: 0033:0x7f2b6bd82d82 [ 30.761714] 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 [ 30.763824] RSP: 002b:00007ffd128fa5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.764719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b6bd82d82 [ 30.765576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b6b1bc000 [ 30.766408] RBP: 00007f2b6b1bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.767247] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579fdd5fec0 [ 30.768089] R13: 00007ffd128fa600 R14: 00007ffd128fa630 R15: 00007ffd128fa990 [ 30.768943] [ 30.769238] [ 30.769475] Allocated by task 213: [ 30.769904] kasan_save_stack+0x22/0x50 [ 30.770408] kasan_set_track+0x25/0x30 [ 30.770912] __kasan_slab_alloc+0x59/0x70 [ 30.771436] kmem_cache_alloc+0x16b/0x370 [ 30.771956] vm_area_dup+0x20/0x160 [ 30.772405] __split_vma+0x170/0x950 [ 30.772870] split_vma+0xc6/0x110 [ 30.773308] mprotect_fixup+0x8d2/0xb30 [ 30.773813] do_mprotect_pkey+0x87e/0xd40 [ 30.774331] __x64_sys_mprotect+0x78/0xc0 [ 30.774851] do_syscall_64+0x3f/0x90 [ 30.775325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775965] [ 30.776182] Freed by task 210: [ 30.776578] kasan_save_stack+0x22/0x50 [ 30.777079] kasan_set_track+0x25/0x30 [ 30.777582] kasan_save_free_info+0x2b/0x50 [ 30.778117] __kasan_slab_free+0x10a/0x190 [ 30.778645] kmem_cache_free+0x10d/0x4d0 [ 30.779151] rcu_core+0x8c8/0x2860 [ 30.779594] __do_softirq+0x1b7/0x7d4 [ 30.780074] [ 30.780286] Last potentially related work creation: [ 30.780864] kasan_save_stack+0x22/0x50 [ 30.781364] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782601] remove_vma+0x139/0x170 [ 30.783047] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783722] do_vmi_munmap+0x1f1/0x2b0 [ 30.784209] __vm_munmap+0x138/0x3a0 [ 30.784675] __x64_sys_munmap+0x59/0x80 [ 30.785167] do_syscall_64+0x3f/0x90 [ 30.785663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786308] [ 30.786525] The buggy address belongs to the object at ffff88801a30a658 [ 30.786525] which belongs to the cache vm_area_struct of size 168 [ 30.787976] The buggy address is located 88 bytes inside of [ 30.787976] freed 168-byte region [ffff88801a30a658, ffff88801a30a700) [ 30.789396] [ 30.789616] The buggy address belongs to the physical page: [ 30.790269] page:00000000e451e140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a30a [ 30.791344] memcg:ffff88801a27ba01 [ 30.791771] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.792417] page_type: 0xffffffff() [ 30.792873] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.793801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a27ba01 [ 30.794701] page dumped because: kasan: bad access detected [ 30.795354] [ 30.795568] Memory state around the buggy address: [ 30.796148] ffff88801a30a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.796995] ffff88801a30a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.797852] >ffff88801a30a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798690] ^ [ 30.799298] ffff88801a30a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.800175] ffff88801a30a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.801019] ================================================================== [ 30.802114] Disabling lock debugging due to kernel taint [ 32.917071] BUG: Bad rss-counter state mm:00000000706be5d1 type:MM_FILEPAGES val:33 [ 32.918236] BUG: Bad rss-counter state mm:00000000706be5d1 type:MM_ANONPAGES val:22 [ 33.316164] BUG: Bad rss-counter state mm:00000000e37a6c3d type:MM_FILEPAGES val:33 [ 33.317165] BUG: Bad rss-counter state mm:00000000e37a6c3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58218' (ECDSA) to the list of known hosts. 2023/06/21 05:38:18 fuzzer started 2023/06/21 05:38:18 dialing manager at localhost:36067 2023/06/21 05:38:19 checking machine... 2023/06/21 05:38:19 checking revisions... [ 34.061830] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:38:19 testing simple program... [ 34.124113] cgroup: Unknown subsys name 'net' [ 34.179343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:18 Registers: info registers vcpu 0 RAX=1ffff11002b8bec5 RBX=0000000000000006 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000d RDI=ffff888015c5f628 RBP=dffffc0000000000 RSP=ffff888015c5f568 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000000 R14=ffff888015c5f5f8 R15=1ffff11002b8bf1d RIP=ffffffff813ad61a 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 00007f447a959700 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=00007f3d2bd87b80 CR3=000000000c6b8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038313a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383037 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016a4f360 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09ff8 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b2f42 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09ff8 R15=ffff88806cf09a50 RIP=ffffffff81130df7 RFL=00000202 [-------] 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 00007fcc69ccb900 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=00007ffee2823000 CR3=000000000cac4000 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=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