syzkaller login: [ 31.394299] BUG: Bad rss-counter state mm:00000000b3f6932f type:MM_FILEPAGES val:33 [ 31.396366] BUG: Bad rss-counter state mm:00000000b3f6932f type:MM_ANONPAGES val:22 [ 31.565749] ================================================================== [ 31.566677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.567617] Read of size 8 at addr ffff888019cc0c20 by task sshd/220 [ 31.568392] [ 31.568607] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.569598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.570555] Call Trace: [ 31.570875] [ 31.571161] dump_stack_lvl+0x91/0xf0 [ 31.571833] print_report+0xcc/0x620 [ 31.572420] ? __virt_addr_valid+0x102/0x340 [ 31.573069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.573800] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.574538] kasan_report+0xbe/0xf0 [ 31.575111] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.575877] vma_interval_tree_remove+0xc75/0xec0 [ 31.576613] vma_prepare+0xc54/0x11a0 [ 31.577193] __split_vma+0x5af/0x950 [ 31.577788] ? __pfx___split_vma+0x10/0x10 [ 31.578469] ? find_held_lock+0x2c/0x110 [ 31.579085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.579778] ? lock_is_held_type+0x9f/0x120 [ 31.580382] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.580992] ? mtree_range_walk+0x632/0x900 [ 31.581545] ? mas_walk+0x5c7/0x7c0 [ 31.582016] do_vmi_munmap+0x1f1/0x2b0 [ 31.582507] mmap_region+0x1f9/0x2660 [ 31.582987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.583506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.584211] ? __pfx_lock_acquire+0x10/0x10 [ 31.584741] ? __pfx_mmap_region+0x10/0x10 [ 31.585271] ? security_mmap_addr+0x7d/0xa0 [ 31.585801] ? get_unmapped_area+0x1f5/0x3f0 [ 31.586341] do_mmap+0x854/0xf00 [ 31.586775] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.587272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.587831] ksys_mmap_pgoff+0x3af/0x500 [ 31.588334] do_syscall_64+0x3f/0x90 [ 31.588804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589450] RIP: 0033:0x7fd5141add82 [ 31.589898] 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 [ 31.592034] RSP: 002b:00007fff6802ce38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.592927] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5141add82 [ 31.593768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5135e7000 [ 31.594603] RBP: 00007fd5135e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.595449] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e465df0f70 [ 31.596285] R13: 00007fff6802ce50 R14: 00007fff6802ce80 R15: 00007fff6802d1e0 [ 31.597127] [ 31.597414] [ 31.597630] Allocated by task 213: [ 31.598055] kasan_save_stack+0x22/0x50 [ 31.598556] kasan_set_track+0x25/0x30 [ 31.599043] __kasan_slab_alloc+0x59/0x70 [ 31.599583] kmem_cache_alloc+0x16b/0x370 [ 31.600119] vm_area_dup+0x20/0x160 [ 31.600609] __split_vma+0x170/0x950 [ 31.601098] split_vma+0xc6/0x110 [ 31.601560] mprotect_fixup+0x8d2/0xb30 [ 31.602091] do_mprotect_pkey+0x87e/0xd40 [ 31.602635] __x64_sys_mprotect+0x78/0xc0 [ 31.603188] do_syscall_64+0x3f/0x90 [ 31.603721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604390] [ 31.604615] Freed by task 203: [ 31.605021] kasan_save_stack+0x22/0x50 [ 31.605556] kasan_set_track+0x25/0x30 [ 31.606082] kasan_save_free_info+0x2b/0x50 [ 31.606655] __kasan_slab_free+0x10a/0x190 [ 31.607218] kmem_cache_free+0x10d/0x4d0 [ 31.607770] rcu_core+0x8c8/0x2860 [ 31.608242] __do_softirq+0x1b7/0x7d4 [ 31.608758] [ 31.608972] Last potentially related work creation: [ 31.609558] kasan_save_stack+0x22/0x50 [ 31.610078] __kasan_record_aux_stack+0x8e/0xa0 [ 31.610768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.611447] remove_vma+0x139/0x170 [ 31.611917] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.612494] do_vmi_munmap+0x1f1/0x2b0 [ 31.612997] __vm_munmap+0x138/0x3a0 [ 31.613477] __x64_sys_munmap+0x59/0x80 [ 31.613970] do_syscall_64+0x3f/0x90 [ 31.614438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615080] [ 31.615296] The buggy address belongs to the object at ffff888019cc0bc8 [ 31.615296] which belongs to the cache vm_area_struct of size 168 [ 31.616761] The buggy address is located 88 bytes inside of [ 31.616761] freed 168-byte region [ffff888019cc0bc8, ffff888019cc0c70) [ 31.618155] [ 31.618369] The buggy address belongs to the physical page: [ 31.619023] page:0000000037262f3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cc0 [ 31.620106] memcg:ffff88800f06e301 [ 31.620533] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.621170] page_type: 0xffffffff() [ 31.621617] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.622523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f06e301 [ 31.623419] page dumped because: kasan: bad access detected [ 31.624073] [ 31.624288] Memory state around the buggy address: [ 31.624863] ffff888019cc0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.625710] ffff888019cc0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.626556] >ffff888019cc0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.627405] ^ [ 31.627921] ffff888019cc0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.628760] ffff888019cc0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.629597] ================================================================== [ 31.630533] Disabling lock debugging due to kernel taint [ 33.416834] BUG: Bad rss-counter state mm:00000000e4977c4c type:MM_FILEPAGES val:33 [ 33.418039] BUG: Bad rss-counter state mm:00000000e4977c4c type:MM_ANONPAGES val:22 [ 33.972588] BUG: Bad rss-counter state mm:000000001d945c35 type:MM_FILEPAGES val:33 [ 33.973757] BUG: Bad rss-counter state mm:000000001d945c35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23768' (ECDSA) to the list of known hosts. 2023/06/20 15:32:00 fuzzer started 2023/06/20 15:32:00 dialing manager at localhost:36067 2023/06/20 15:32:00 checking machine... 2023/06/20 15:32:00 checking revisions... [ 34.646760] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:32:00 testing simple program... [ 34.697201] cgroup: Unknown subsys name 'net' [ 34.759768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:00 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000008 RSI=ffff888016d47f18 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff863b3570 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a966 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888016d47f20 R15=ffff88806ce09a98 RIP=ffffffff811303f0 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 00007fb738132900 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=00007ffd9a8b5000 CR3=000000000f18c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f3408f7a5a0 CR3=000000000e018000 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=2039353a31333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000