syzkaller login: [ 30.837910] BUG: Bad rss-counter state mm:00000000eeaab860 type:MM_FILEPAGES val:33 [ 30.839358] BUG: Bad rss-counter state mm:00000000eeaab860 type:MM_ANONPAGES val:22 [ 30.971756] ================================================================== [ 30.972685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.973635] Read of size 8 at addr ffff888019c48a50 by task sshd/220 [ 30.974452] [ 30.974683] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.975839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.976948] Call Trace: [ 30.977279] [ 30.977581] dump_stack_lvl+0x91/0xf0 [ 30.978112] print_report+0xcc/0x620 [ 30.978613] ? __virt_addr_valid+0x102/0x340 [ 30.979227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979865] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980497] kasan_report+0xbe/0xf0 [ 30.981005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981628] vma_interval_tree_remove+0xc75/0xec0 [ 30.982270] vma_prepare+0xc54/0x11a0 [ 30.982760] __split_vma+0x5af/0x950 [ 30.983267] ? __pfx___split_vma+0x10/0x10 [ 30.983803] ? find_held_lock+0x2c/0x110 [ 30.984391] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.984981] ? lock_is_held_type+0x9f/0x120 [ 30.985524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986162] ? mtree_range_walk+0x632/0x900 [ 30.986719] ? mas_walk+0x5c7/0x7c0 [ 30.987223] do_vmi_munmap+0x1f1/0x2b0 [ 30.987725] mmap_region+0x1f9/0x2660 [ 30.988228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.988738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.989468] ? __pfx_lock_acquire+0x10/0x10 [ 30.990032] ? __pfx_mmap_region+0x10/0x10 [ 30.990575] ? security_mmap_addr+0x7d/0xa0 [ 30.991131] ? get_unmapped_area+0x1f5/0x3f0 [ 30.991714] do_mmap+0x854/0xf00 [ 30.992163] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.992664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.993241] ksys_mmap_pgoff+0x3af/0x500 [ 30.993749] do_syscall_64+0x3f/0x90 [ 30.994259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994927] RIP: 0033:0x7f2bcb584d82 [ 30.995402] 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 [ 30.997540] RSP: 002b:00007ffde6aba538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.998467] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bcb584d82 [ 30.999341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bca9be000 [ 31.000190] RBP: 00007f2bca9be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.001043] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dfde6dec0 [ 31.001897] R13: 00007ffde6aba550 R14: 00007ffde6aba580 R15: 00007ffde6aba8e0 [ 31.002761] [ 31.003075] [ 31.003316] Allocated by task 213: [ 31.003742] kasan_save_stack+0x22/0x50 [ 31.004261] kasan_set_track+0x25/0x30 [ 31.004751] __kasan_slab_alloc+0x59/0x70 [ 31.005283] kmem_cache_alloc+0x16b/0x370 [ 31.005791] vm_area_dup+0x20/0x160 [ 31.006265] __split_vma+0x170/0x950 [ 31.006732] split_vma+0xc6/0x110 [ 31.007195] mprotect_fixup+0x8d2/0xb30 [ 31.007697] do_mprotect_pkey+0x87e/0xd40 [ 31.008225] __x64_sys_mprotect+0x78/0xc0 [ 31.008745] do_syscall_64+0x3f/0x90 [ 31.009240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009905] [ 31.010123] Freed by task 213: [ 31.010516] kasan_save_stack+0x22/0x50 [ 31.011036] kasan_set_track+0x25/0x30 [ 31.011548] kasan_save_free_info+0x2b/0x50 [ 31.012088] __kasan_slab_free+0x10a/0x190 [ 31.012615] kmem_cache_free+0x10d/0x4d0 [ 31.013131] rcu_core+0x8c8/0x2860 [ 31.013571] __do_softirq+0x1b7/0x7d4 [ 31.014072] [ 31.014289] Last potentially related work creation: [ 31.014883] kasan_save_stack+0x22/0x50 [ 31.015402] __kasan_record_aux_stack+0x8e/0xa0 [ 31.015983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.016617] remove_vma+0x139/0x170 [ 31.017085] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.017642] do_vmi_munmap+0x1f1/0x2b0 [ 31.018150] __vm_munmap+0x138/0x3a0 [ 31.018618] __x64_sys_munmap+0x59/0x80 [ 31.019120] do_syscall_64+0x3f/0x90 [ 31.019621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020271] [ 31.020485] The buggy address belongs to the object at ffff888019c489f8 [ 31.020485] which belongs to the cache vm_area_struct of size 168 [ 31.021973] The buggy address is located 88 bytes inside of [ 31.021973] freed 168-byte region [ffff888019c489f8, ffff888019c48aa0) [ 31.023394] [ 31.023612] The buggy address belongs to the physical page: [ 31.024278] page:000000004e35af12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c48 [ 31.025372] memcg:ffff888019c72401 [ 31.025794] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.026453] page_type: 0xffffffff() [ 31.026916] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.027867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c72401 [ 31.028775] page dumped because: kasan: bad access detected [ 31.029442] [ 31.029657] Memory state around the buggy address: [ 31.030252] ffff888019c48900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.031131] ffff888019c48980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.032000] >ffff888019c48a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.032856] ^ [ 31.033545] ffff888019c48a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.034432] ffff888019c48b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.035317] ================================================================== [ 31.036573] Disabling lock debugging due to kernel taint [ 33.840680] BUG: Bad rss-counter state mm:00000000fec3b6c2 type:MM_FILEPAGES val:33 [ 33.841584] BUG: Bad rss-counter state mm:00000000fec3b6c2 type:MM_ANONPAGES val:22 [ 34.429842] BUG: Bad rss-counter state mm:000000005541a2cb type:MM_FILEPAGES val:33 [ 34.430887] BUG: Bad rss-counter state mm:000000005541a2cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52471' (ECDSA) to the list of known hosts. 2023/06/20 20:57:45 fuzzer started 2023/06/20 20:57:46 dialing manager at localhost:36067 2023/06/20 20:57:46 checking machine... 2023/06/20 20:57:46 checking revisions... [ 35.030772] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:57:46 testing simple program... [ 35.076251] cgroup: Unknown subsys name 'net' [ 35.134390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8363b61c RCX=0000000000000001 RDX=1ffff11002cc8f51 RSI=ffff888016647e58 RDI=ffffffff8363b61c RBP=ffffffff8363b61c RSP=ffff8880166479e0 R8 =0000000000000001 R9 =ffff888016647a70 R10=0000000000038001 R11=000000000008a6b1 R12=0000000000000001 R13=0000000000000000 R14=ffff888014588000 R15=ffff88800d4c3130 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007fef31b30900 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=00007ffeeb533000 CR3=000000001ada4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000098 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e07f01 RSI=ffff888008e07f00 RDI=ffff888008e07f00 RBP=ffff88806cf09aa8 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff888008e07f00 R15=ffff88806cf09a50 RIP=ffffffff8112fbf3 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 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=00007f6995426800 CR3=000000000d62e000 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=00000000000000000000000000000000 XMM01=4841fb820be84f9c8c457e18721e59aa XMM02=ec2efd57dc4c00df000000000011ab70 XMM03=7d0cfd12dbedaa96000000000011ac40 XMM04=45281d605d39749000000000000ae988 XMM05=19e9129bd510f2350000000000131f98 XMM06=de83289fd27183be0000000000130e00 XMM07=e042d86d42eb936e00000000001223a0 XMM08=7d0cfd12dbedaa96000000000011ac40 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000