syzkaller login: [ 30.164538] BUG: Bad rss-counter state mm:000000003897471e type:MM_FILEPAGES val:33 [ 30.165754] BUG: Bad rss-counter state mm:000000003897471e type:MM_ANONPAGES val:22 [ 30.193811] ================================================================== [ 30.194697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.195524] Read of size 8 at addr ffff8880146f2a50 by task sshd/220 [ 30.196195] [ 30.196396] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.197185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.198007] Call Trace: [ 30.198326] [ 30.198543] dump_stack_lvl+0x91/0xf0 [ 30.199027] print_report+0xcc/0x620 [ 30.199492] ? __virt_addr_valid+0x102/0x340 [ 30.199878] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200711] kasan_report+0xbe/0xf0 [ 30.200991] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.201346] vma_interval_tree_remove+0xc75/0xec0 [ 30.201687] vma_prepare+0xc54/0x11a0 [ 30.201963] __split_vma+0x5af/0x950 [ 30.202239] ? __pfx___split_vma+0x10/0x10 [ 30.202613] ? find_held_lock+0x2c/0x110 [ 30.203051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.203375] ? lock_is_held_type+0x9f/0x120 [ 30.203696] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.204037] ? mtree_range_walk+0x632/0x900 [ 30.204357] ? mas_walk+0x5c7/0x7c0 [ 30.204651] do_vmi_munmap+0x1f1/0x2b0 [ 30.204953] mmap_region+0x1f9/0x2660 [ 30.205216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.205495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.205881] ? __pfx_lock_acquire+0x10/0x10 [ 30.206172] ? __pfx_mmap_region+0x10/0x10 [ 30.206471] ? security_mmap_addr+0x7d/0xa0 [ 30.206794] ? get_unmapped_area+0x1f5/0x3f0 [ 30.207143] do_mmap+0x854/0xf00 [ 30.207392] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.207658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.207988] ksys_mmap_pgoff+0x3af/0x500 [ 30.208292] do_syscall_64+0x3f/0x90 [ 30.208558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.208913] RIP: 0033:0x7fabef070d82 [ 30.209163] 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 [ 30.210318] RSP: 002b:00007fff23ea4e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.210806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabef070d82 [ 30.211280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabee4aa000 [ 30.211742] RBP: 00007fabee4aa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.212203] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563282802ec0 [ 30.212662] R13: 00007fff23ea4e30 R14: 00007fff23ea4e60 R15: 00007fff23ea51c0 [ 30.213136] [ 30.213296] [ 30.213412] Allocated by task 213: [ 30.213645] kasan_save_stack+0x22/0x50 [ 30.213937] kasan_set_track+0x25/0x30 [ 30.214218] __kasan_slab_alloc+0x59/0x70 [ 30.214518] kmem_cache_alloc+0x16b/0x370 [ 30.214815] vm_area_dup+0x20/0x160 [ 30.215082] __split_vma+0x170/0x950 [ 30.215353] split_vma+0xc6/0x110 [ 30.215604] mprotect_fixup+0x8d2/0xb30 [ 30.215897] do_mprotect_pkey+0x87e/0xd40 [ 30.216195] __x64_sys_mprotect+0x78/0xc0 [ 30.216500] do_syscall_64+0x3f/0x90 [ 30.216771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.217142] [ 30.217268] Freed by task 213: [ 30.217489] kasan_save_stack+0x22/0x50 [ 30.217776] kasan_set_track+0x25/0x30 [ 30.218058] kasan_save_free_info+0x2b/0x50 [ 30.218364] __kasan_slab_free+0x10a/0x190 [ 30.218667] kmem_cache_free+0x10d/0x4d0 [ 30.218975] rcu_core+0x8c8/0x2860 [ 30.219230] __do_softirq+0x1b7/0x7d4 [ 30.219511] [ 30.219631] Last potentially related work creation: [ 30.219966] kasan_save_stack+0x22/0x50 [ 30.220252] __kasan_record_aux_stack+0x8e/0xa0 [ 30.220578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.220949] remove_vma+0x139/0x170 [ 30.221205] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.221524] do_vmi_munmap+0x1f1/0x2b0 [ 30.221808] __vm_munmap+0x138/0x3a0 [ 30.222081] __x64_sys_munmap+0x59/0x80 [ 30.222369] do_syscall_64+0x3f/0x90 [ 30.222641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.223009] [ 30.223132] The buggy address belongs to the object at ffff8880146f29f8 [ 30.223132] which belongs to the cache vm_area_struct of size 168 [ 30.224308] The buggy address is located 88 bytes inside of [ 30.224308] freed 168-byte region [ffff8880146f29f8, ffff8880146f2aa0) [ 30.225111] [ 30.225232] The buggy address belongs to the physical page: [ 30.225618] page:000000007737a05a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146f2 [ 30.226294] memcg:ffff88800ef1ac01 [ 30.226544] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.226929] page_type: 0xffffffff() [ 30.227188] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.227724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1ac01 [ 30.228241] page dumped because: kasan: bad access detected [ 30.228628] [ 30.228752] Memory state around the buggy address: [ 30.229083] ffff8880146f2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.229581] ffff8880146f2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.230079] >ffff8880146f2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.230566] ^ [ 30.230966] ffff8880146f2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.231449] ffff8880146f2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.231923] ================================================================== [ 30.232505] Disabling lock debugging due to kernel taint [ 32.167248] BUG: Bad rss-counter state mm:000000006f2ca9ae type:MM_FILEPAGES val:33 [ 32.168282] BUG: Bad rss-counter state mm:000000006f2ca9ae type:MM_ANONPAGES val:22 [ 32.789790] BUG: Bad rss-counter state mm:00000000e5478526 type:MM_FILEPAGES val:33 [ 32.791106] BUG: Bad rss-counter state mm:00000000e5478526 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15422' (ECDSA) to the list of known hosts. 2023/06/20 22:01:08 fuzzer started 2023/06/20 22:01:08 dialing manager at localhost:36067 2023/06/20 22:01:08 checking machine... 2023/06/20 22:01:08 checking revisions... [ 33.492541] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:01:08 testing simple program... [ 33.542982] cgroup: Unknown subsys name 'net' [ 33.599863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09b30 RDI=ffffffff813ad720 RBP=ffff88806ce09af0 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888015f2fec0 RIP=ffffffff811fc8a2 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 0000000000000000 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=00007ffc4432bd08 CR3=0000000005482000 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=00007f954a8fd510000055a7fc7ac790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d1af5b RSI=ffffffff8363b743 RDI=ffff8880168d7b48 RBP=ffff8880168d7b18 RSP=ffff8880168d7a78 R8 =0000000000000001 R9 =ffff8880168d7ac0 R10=0000000000038001 R11=000000000008a95e R12=ffff8880168d7b48 R13=0000000000000000 R14=ffff88800f291b40 R15=ffff8880093d5ab0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f5b5f066900 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=00007f5b5f61e0b0 CR3=000000000eb22000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000