syzkaller login: [ 31.509617] BUG: Bad rss-counter state mm:000000006e3cc712 type:MM_FILEPAGES val:33 [ 31.511026] BUG: Bad rss-counter state mm:000000006e3cc712 type:MM_ANONPAGES val:22 [ 31.684645] ================================================================== [ 31.685648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.686640] Read of size 8 at addr ffff888017b05a50 by task sshd/220 [ 31.687589] [ 31.687829] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.688766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.689875] Call Trace: [ 31.690227] [ 31.690541] dump_stack_lvl+0x91/0xf0 [ 31.691074] print_report+0xcc/0x620 [ 31.691611] ? __virt_addr_valid+0x102/0x340 [ 31.692218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.693571] kasan_report+0xbe/0xf0 [ 31.694095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694774] vma_interval_tree_remove+0xc75/0xec0 [ 31.695432] vma_prepare+0xc54/0x11a0 [ 31.695960] __split_vma+0x5af/0x950 [ 31.696482] ? __pfx___split_vma+0x10/0x10 [ 31.697053] ? find_held_lock+0x2c/0x110 [ 31.697650] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.698275] ? lock_is_held_type+0x9f/0x120 [ 31.698863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.699525] ? mtree_range_walk+0x632/0x900 [ 31.700132] ? mas_walk+0x5c7/0x7c0 [ 31.700653] do_vmi_munmap+0x1f1/0x2b0 [ 31.701211] mmap_region+0x1f9/0x2660 [ 31.701786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.702336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.703291] ? __pfx_lock_acquire+0x10/0x10 [ 31.704002] ? __pfx_mmap_region+0x10/0x10 [ 31.704709] ? security_mmap_addr+0x7d/0xa0 [ 31.705441] ? get_unmapped_area+0x1f5/0x3f0 [ 31.706180] do_mmap+0x854/0xf00 [ 31.706773] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.707444] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.708203] ksys_mmap_pgoff+0x3af/0x500 [ 31.708890] do_syscall_64+0x3f/0x90 [ 31.709550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.710422] RIP: 0033:0x7f6622f60d82 [ 31.711025] 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 [ 31.713563] RSP: 002b:00007fffb1f45938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.714659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6622f60d82 [ 31.715672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f662239a000 [ 31.716614] RBP: 00007f662239a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.717444] R10: 0000000000000812 R11: 0000000000000206 R12: 000055573c5bfec0 [ 31.718244] R13: 00007fffb1f45950 R14: 00007fffb1f45980 R15: 00007fffb1f45ce0 [ 31.719069] [ 31.719360] [ 31.719579] Allocated by task 213: [ 31.719987] kasan_save_stack+0x22/0x50 [ 31.720477] kasan_set_track+0x25/0x30 [ 31.720946] __kasan_slab_alloc+0x59/0x70 [ 31.721475] kmem_cache_alloc+0x16b/0x370 [ 31.721960] vm_area_dup+0x20/0x160 [ 31.722403] __split_vma+0x170/0x950 [ 31.722846] split_vma+0xc6/0x110 [ 31.723267] mprotect_fixup+0x8d2/0xb30 [ 31.723754] do_mprotect_pkey+0x87e/0xd40 [ 31.724251] __x64_sys_mprotect+0x78/0xc0 [ 31.724773] do_syscall_64+0x3f/0x90 [ 31.725233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.725857] [ 31.726067] Freed by task 19: [ 31.726445] kasan_save_stack+0x22/0x50 [ 31.726922] kasan_set_track+0x25/0x30 [ 31.727404] kasan_save_free_info+0x2b/0x50 [ 31.727908] __kasan_slab_free+0x10a/0x190 [ 31.728434] kmem_cache_free+0x10d/0x4d0 [ 31.728916] rcu_core+0x8c8/0x2860 [ 31.729373] __do_softirq+0x1b7/0x7d4 [ 31.729830] [ 31.730043] Last potentially related work creation: [ 31.730605] kasan_save_stack+0x22/0x50 [ 31.731166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.731773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.732409] remove_vma+0x139/0x170 [ 31.732841] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.733398] do_vmi_munmap+0x1f1/0x2b0 [ 31.733857] __vm_munmap+0x138/0x3a0 [ 31.734312] __x64_sys_munmap+0x59/0x80 [ 31.734798] do_syscall_64+0x3f/0x90 [ 31.735258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735886] [ 31.736097] The buggy address belongs to the object at ffff888017b059f8 [ 31.736097] which belongs to the cache vm_area_struct of size 168 [ 31.737777] The buggy address is located 88 bytes inside of [ 31.737777] freed 168-byte region [ffff888017b059f8, ffff888017b05aa0) [ 31.739603] [ 31.739925] The buggy address belongs to the physical page: [ 31.740820] page:00000000d3f13dcc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17b05 [ 31.742234] memcg:ffff88800e116001 [ 31.742779] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.743618] page_type: 0xffffffff() [ 31.744192] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.745505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e116001 [ 31.746667] page dumped because: kasan: bad access detected [ 31.747527] [ 31.747797] Memory state around the buggy address: [ 31.748548] ffff888017b05900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.749716] ffff888017b05980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.750831] >ffff888017b05a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.751948] ^ [ 31.752877] ffff888017b05a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.754011] ffff888017b05b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.755134] ================================================================== [ 31.756511] Disabling lock debugging due to kernel taint [ 33.908871] BUG: Bad rss-counter state mm:000000008c621501 type:MM_FILEPAGES val:33 [ 33.910074] BUG: Bad rss-counter state mm:000000008c621501 type:MM_ANONPAGES val:22 [ 34.366701] BUG: Bad rss-counter state mm:00000000a04b87c0 type:MM_FILEPAGES val:33 [ 34.367872] BUG: Bad rss-counter state mm:00000000a04b87c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17001' (ECDSA) to the list of known hosts. 2023/06/20 20:37:53 fuzzer started 2023/06/20 20:37:53 dialing manager at localhost:36067 2023/06/20 20:37:53 checking machine... 2023/06/20 20:37:53 checking revisions... [ 35.018872] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:37:53 testing simple program... [ 35.065891] cgroup: Unknown subsys name 'net' [ 35.129762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=000000000000132f RSI=000000000000132f RDI=ffffffff864ee6ac RBP=ffff88806ce09aa8 RSP=ffff88806ce09990 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff8113077a RFL=00000213 [----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 00007f9120bb7900 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=00007f912116f0b0 CR3=000000000c9fe000 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=0000001764959d44 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000053f1c RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f04ab R11=ffff88806cf09ff8 R12=0000000000053f1c R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----AP-] 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=00007f3a01010cf0 CR3=000000000e5c0000 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=2032353a37333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37333a3032203032 XMM08=732f62696c2f223d6874617020303d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000