syzkaller login: [ 30.611104] BUG: Bad rss-counter state mm:000000009cff13e3 type:MM_FILEPAGES val:33 [ 30.612103] BUG: Bad rss-counter state mm:000000009cff13e3 type:MM_ANONPAGES val:22 [ 30.778546] ================================================================== [ 30.779452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.780387] Read of size 8 at addr ffff888016d62798 by task sshd/220 [ 30.781278] [ 30.781511] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.782369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.783331] Call Trace: [ 30.783672] [ 30.783957] dump_stack_lvl+0x91/0xf0 [ 30.784451] print_report+0xcc/0x620 [ 30.784935] ? __virt_addr_valid+0x102/0x340 [ 30.785483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786100] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786714] kasan_report+0xbe/0xf0 [ 30.787188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787811] vma_interval_tree_remove+0xc75/0xec0 [ 30.788419] vma_prepare+0xc54/0x11a0 [ 30.788905] __split_vma+0x5af/0x950 [ 30.789380] ? __pfx___split_vma+0x10/0x10 [ 30.789947] ? find_held_lock+0x2c/0x110 [ 30.790477] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.791045] ? lock_is_held_type+0x9f/0x120 [ 30.791583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.792187] ? mtree_range_walk+0x632/0x900 [ 30.792737] ? mas_walk+0x5c7/0x7c0 [ 30.793208] do_vmi_munmap+0x1f1/0x2b0 [ 30.793705] mmap_region+0x1f9/0x2660 [ 30.794209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.794719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.795434] ? __pfx_lock_acquire+0x10/0x10 [ 30.795965] ? __pfx_mmap_region+0x10/0x10 [ 30.796496] ? security_mmap_addr+0x7d/0xa0 [ 30.797027] ? get_unmapped_area+0x1f5/0x3f0 [ 30.797588] do_mmap+0x854/0xf00 [ 30.798043] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.798533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.799096] ksys_mmap_pgoff+0x3af/0x500 [ 30.799608] do_syscall_64+0x3f/0x90 [ 30.800090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800740] RIP: 0033:0x7fc126d8ad82 [ 30.801204] 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 [ 30.803381] RSP: 002b:00007ffdf98d9688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.804304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc126d8ad82 [ 30.805154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1261c4000 [ 30.806018] RBP: 00007fc1261c4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.806877] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a845a0bec0 [ 30.807728] R13: 00007ffdf98d96a0 R14: 00007ffdf98d96d0 R15: 00007ffdf98d9a30 [ 30.808596] [ 30.808885] [ 30.809104] Allocated by task 213: [ 30.809528] kasan_save_stack+0x22/0x50 [ 30.810051] kasan_set_track+0x25/0x30 [ 30.810547] __kasan_slab_alloc+0x59/0x70 [ 30.811082] kmem_cache_alloc+0x16b/0x370 [ 30.811600] vm_area_dup+0x20/0x160 [ 30.812045] __split_vma+0x170/0x950 [ 30.812514] split_vma+0xc6/0x110 [ 30.812958] mprotect_fixup+0x8d2/0xb30 [ 30.813453] do_mprotect_pkey+0x87e/0xd40 [ 30.813956] __x64_sys_mprotect+0x78/0xc0 [ 30.814454] do_syscall_64+0x3f/0x90 [ 30.814908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815517] [ 30.815720] Freed by task 19: [ 30.816104] kasan_save_stack+0x22/0x50 [ 30.816583] kasan_set_track+0x25/0x30 [ 30.817053] kasan_save_free_info+0x2b/0x50 [ 30.817563] __kasan_slab_free+0x10a/0x190 [ 30.818083] kmem_cache_free+0x10d/0x4d0 [ 30.818565] rcu_core+0x8c8/0x2860 [ 30.818988] __do_softirq+0x1b7/0x7d4 [ 30.819438] [ 30.819643] Last potentially related work creation: [ 30.820188] kasan_save_stack+0x22/0x50 [ 30.820662] __kasan_record_aux_stack+0x8e/0xa0 [ 30.821201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.821817] remove_vma+0x139/0x170 [ 30.822303] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.822857] do_vmi_munmap+0x1f1/0x2b0 [ 30.823313] __vm_munmap+0x138/0x3a0 [ 30.823750] __x64_sys_munmap+0x59/0x80 [ 30.824224] do_syscall_64+0x3f/0x90 [ 30.824676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825289] [ 30.825496] The buggy address belongs to the object at ffff888016d62740 [ 30.825496] which belongs to the cache vm_area_struct of size 168 [ 30.826939] The buggy address is located 88 bytes inside of [ 30.826939] freed 168-byte region [ffff888016d62740, ffff888016d627e8) [ 30.828301] [ 30.828513] The buggy address belongs to the physical page: [ 30.829150] page:00000000ba6113bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d62 [ 30.830207] memcg:ffff888009462c01 [ 30.830620] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.831248] page_type: 0xffffffff() [ 30.831686] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.832583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009462c01 [ 30.833454] page dumped because: kasan: bad access detected [ 30.834112] [ 30.834319] Memory state around the buggy address: [ 30.834882] ffff888016d62680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.835708] ffff888016d62700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.836544] >ffff888016d62780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.837366] ^ [ 30.837878] ffff888016d62800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.838708] ffff888016d62880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.839538] ================================================================== [ 30.840430] Disabling lock debugging due to kernel taint [ 33.215880] BUG: Bad rss-counter state mm:00000000cd9732d6 type:MM_FILEPAGES val:33 [ 33.217055] BUG: Bad rss-counter state mm:00000000cd9732d6 type:MM_ANONPAGES val:22 [ 33.778317] BUG: Bad rss-counter state mm:00000000b0e09d1a type:MM_FILEPAGES val:33 [ 33.779493] BUG: Bad rss-counter state mm:00000000b0e09d1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40335' (ECDSA) to the list of known hosts. 2023/06/21 05:17:32 fuzzer started 2023/06/21 05:17:33 dialing manager at localhost:36067 2023/06/21 05:17:33 checking machine... 2023/06/21 05:17:33 checking revisions... [ 34.437930] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:17:33 testing simple program... [ 34.478067] cgroup: Unknown subsys name 'net' [ 34.513506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:17:32 Registers: info registers vcpu 0 RAX=ffffffff8118ddc3 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8118ddc3 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015fdb680 R15=ffff888009712540 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 00007f2556d5f900 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=00007f25573170b0 CR3=000000000c56c000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff888008e379b0 RSP=ffff888008e37898 R8 =0000000000000000 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37999 R15=ffff888008e37958 RIP=ffffffff8113077a RFL=00000212 [----A--] 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=00007fd5d0164470 CR3=000000000d688000 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=2032333a37313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000