syzkaller login: [ 30.873374] BUG: Bad rss-counter state mm:00000000c1cc7877 type:MM_FILEPAGES val:33 [ 30.874918] BUG: Bad rss-counter state mm:00000000c1cc7877 type:MM_ANONPAGES val:22 [ 31.001498] ================================================================== [ 31.002174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.002836] Read of size 8 at addr ffff8880168eba50 by task sshd/220 [ 31.003420] [ 31.003578] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.004181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.004862] Call Trace: [ 31.005089] [ 31.005292] dump_stack_lvl+0x91/0xf0 [ 31.005641] print_report+0xcc/0x620 [ 31.006140] ? __virt_addr_valid+0x102/0x340 [ 31.006555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007438] kasan_report+0xbe/0xf0 [ 31.007778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008214] vma_interval_tree_remove+0xc75/0xec0 [ 31.008654] vma_prepare+0xc54/0x11a0 [ 31.008994] __split_vma+0x5af/0x950 [ 31.009335] ? __pfx___split_vma+0x10/0x10 [ 31.009712] ? find_held_lock+0x2c/0x110 [ 31.010230] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.010647] ? lock_is_held_type+0x9f/0x120 [ 31.011052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.011534] ? mtree_range_walk+0x632/0x900 [ 31.011942] ? mas_walk+0x5c7/0x7c0 [ 31.012300] do_vmi_munmap+0x1f1/0x2b0 [ 31.012668] mmap_region+0x1f9/0x2660 [ 31.013021] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.013414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.013952] ? __pfx_lock_acquire+0x10/0x10 [ 31.014348] ? __pfx_mmap_region+0x10/0x10 [ 31.014730] ? security_mmap_addr+0x7d/0xa0 [ 31.015136] ? get_unmapped_area+0x1f5/0x3f0 [ 31.015567] do_mmap+0x854/0xf00 [ 31.015891] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.016265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.016692] ksys_mmap_pgoff+0x3af/0x500 [ 31.017070] do_syscall_64+0x3f/0x90 [ 31.017428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.017911] RIP: 0033:0x7f7379e5dd82 [ 31.018256] 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 [ 31.019887] RSP: 002b:00007fff201886c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.020552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7379e5dd82 [ 31.021186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7379297000 [ 31.021828] RBP: 00007f7379297000 R08: 0000000000000009 R09: 0000000000001000 [ 31.022441] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591ecc26f70 [ 31.023061] R13: 00007fff201886e0 R14: 00007fff20188710 R15: 00007fff20188a70 [ 31.023732] [ 31.023945] [ 31.024102] Allocated by task 213: [ 31.024427] kasan_save_stack+0x22/0x50 [ 31.024808] kasan_set_track+0x25/0x30 [ 31.025176] __kasan_slab_alloc+0x59/0x70 [ 31.025563] kmem_cache_alloc+0x16b/0x370 [ 31.025940] vm_area_dup+0x20/0x160 [ 31.026287] __split_vma+0x170/0x950 [ 31.026622] split_vma+0xc6/0x110 [ 31.026951] mprotect_fixup+0x8d2/0xb30 [ 31.027345] do_mprotect_pkey+0x87e/0xd40 [ 31.027727] __x64_sys_mprotect+0x78/0xc0 [ 31.028122] do_syscall_64+0x3f/0x90 [ 31.028470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.028952] [ 31.029115] Freed by task 202: [ 31.029407] kasan_save_stack+0x22/0x50 [ 31.029779] kasan_set_track+0x25/0x30 [ 31.030163] kasan_save_free_info+0x2b/0x50 [ 31.030568] __kasan_slab_free+0x10a/0x190 [ 31.030960] kmem_cache_free+0x10d/0x4d0 [ 31.031351] rcu_core+0x8c8/0x2860 [ 31.031693] __do_softirq+0x1b7/0x7d4 [ 31.032047] [ 31.032215] Last potentially related work creation: [ 31.032650] kasan_save_stack+0x22/0x50 [ 31.033020] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.033942] remove_vma+0x139/0x170 [ 31.034283] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.034697] do_vmi_munmap+0x1f1/0x2b0 [ 31.035054] __vm_munmap+0x138/0x3a0 [ 31.035407] __x64_sys_munmap+0x59/0x80 [ 31.035782] do_syscall_64+0x3f/0x90 [ 31.036148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036641] [ 31.036805] The buggy address belongs to the object at ffff8880168eb9f8 [ 31.036805] which belongs to the cache vm_area_struct of size 168 [ 31.037914] The buggy address is located 88 bytes inside of [ 31.037914] freed 168-byte region [ffff8880168eb9f8, ffff8880168ebaa0) [ 31.038966] [ 31.039124] The buggy address belongs to the physical page: [ 31.039631] page:00000000674a2f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168eb [ 31.040445] memcg:ffff888019ec7701 [ 31.040775] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.041253] page_type: 0xffffffff() [ 31.041588] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.042303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec7701 [ 31.043014] page dumped because: kasan: bad access detected [ 31.043526] [ 31.043682] Memory state around the buggy address: [ 31.044117] ffff8880168eb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.044756] ffff8880168eb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.045382] >ffff8880168eba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.046030] ^ [ 31.046557] ffff8880168eba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.047203] ffff8880168ebb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.047982] ================================================================== [ 31.048715] Disabling lock debugging due to kernel taint [ 32.564709] BUG: Bad rss-counter state mm:00000000d195196f type:MM_FILEPAGES val:33 [ 32.565455] BUG: Bad rss-counter state mm:00000000d195196f type:MM_ANONPAGES val:22 [ 33.000959] BUG: Bad rss-counter state mm:00000000dbe62a1d type:MM_FILEPAGES val:33 [ 33.001672] BUG: Bad rss-counter state mm:00000000dbe62a1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3033' (ECDSA) to the list of known hosts. 2023/06/21 09:08:45 fuzzer started 2023/06/21 09:08:45 dialing manager at localhost:36067 2023/06/21 09:08:45 checking machine... 2023/06/21 09:08:45 checking revisions... [ 33.498262] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:08:45 testing simple program... [ 33.538790] cgroup: Unknown subsys name 'net' [ 33.578750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81279d58 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=dffffc0000000000 RSP=ffffffff85407df0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-PC] 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=00007ffe407f6468 CR3=0000000009a22000 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=2035343a38303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a38303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888016477d90 RSP=ffff888016477d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=0000000000000000 R11=0000000000000001 R12=ffff888008fae500 R13=ffff888015a9aa80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81808774 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 00007f4633ef7900 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=00007f46344af0b0 CR3=000000000c924000 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