syzkaller login: [ 30.807063] BUG: Bad rss-counter state mm:00000000dd8f6915 type:MM_FILEPAGES val:33 [ 30.808497] BUG: Bad rss-counter state mm:00000000dd8f6915 type:MM_ANONPAGES val:22 [ 30.986761] ================================================================== [ 30.987685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.988634] Read of size 8 at addr ffff8880182676b0 by task sshd/221 [ 30.989598] [ 30.989829] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.990705] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.991760] Call Trace: [ 30.992096] [ 30.992380] dump_stack_lvl+0x91/0xf0 [ 30.992875] print_report+0xcc/0x620 [ 30.993371] ? __virt_addr_valid+0x102/0x340 [ 30.993956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995272] kasan_report+0xbe/0xf0 [ 30.995749] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996387] vma_interval_tree_remove+0xc75/0xec0 [ 30.997010] vma_prepare+0xc54/0x11a0 [ 30.997497] __split_vma+0x5af/0x950 [ 30.998010] ? __pfx___split_vma+0x10/0x10 [ 30.998535] ? find_held_lock+0x2c/0x110 [ 30.999126] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.999692] ? lock_is_held_type+0x9f/0x120 [ 31.000241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.000847] ? mtree_range_walk+0x632/0x900 [ 31.001421] ? mas_walk+0x5c7/0x7c0 [ 31.001913] do_vmi_munmap+0x1f1/0x2b0 [ 31.002412] mmap_region+0x1f9/0x2660 [ 31.002966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.003483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.004203] ? __pfx_lock_acquire+0x10/0x10 [ 31.004735] ? __pfx_mmap_region+0x10/0x10 [ 31.005284] ? security_mmap_addr+0x7d/0xa0 [ 31.005822] ? get_unmapped_area+0x1f5/0x3f0 [ 31.006380] do_mmap+0x854/0xf00 [ 31.006856] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.007388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.007961] ksys_mmap_pgoff+0x3af/0x500 [ 31.008469] do_syscall_64+0x3f/0x90 [ 31.008965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009628] RIP: 0033:0x7fc2dfca5d82 [ 31.010125] 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 [ 31.012313] RSP: 002b:00007ffe1dfdb488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.013224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2dfca5d82 [ 31.014094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2df0df000 [ 31.015017] RBP: 00007fc2df0df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.015846] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5b055e980 [ 31.016695] R13: 00007ffe1dfdb4a0 R14: 00007ffe1dfdb4d0 R15: 00007ffe1dfdb830 [ 31.017555] [ 31.017901] [ 31.018144] Allocated by task 214: [ 31.018570] kasan_save_stack+0x22/0x50 [ 31.019150] kasan_set_track+0x25/0x30 [ 31.019644] __kasan_slab_alloc+0x59/0x70 [ 31.020175] kmem_cache_alloc+0x16b/0x370 [ 31.020687] vm_area_dup+0x20/0x160 [ 31.021167] __split_vma+0x170/0x950 [ 31.021631] split_vma+0xc6/0x110 [ 31.022109] mprotect_fixup+0x8d2/0xb30 [ 31.022606] do_mprotect_pkey+0x87e/0xd40 [ 31.023203] __x64_sys_mprotect+0x78/0xc0 [ 31.023719] do_syscall_64+0x3f/0x90 [ 31.024207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024848] [ 31.025077] Freed by task 214: [ 31.025472] kasan_save_stack+0x22/0x50 [ 31.026020] kasan_set_track+0x25/0x30 [ 31.026512] kasan_save_free_info+0x2b/0x50 [ 31.027134] __kasan_slab_free+0x10a/0x190 [ 31.027665] kmem_cache_free+0x10d/0x4d0 [ 31.028188] rcu_core+0x8c8/0x2860 [ 31.028634] __do_softirq+0x1b7/0x7d4 [ 31.029124] [ 31.029337] Last potentially related work creation: [ 31.029945] kasan_save_stack+0x22/0x50 [ 31.030449] __kasan_record_aux_stack+0x8e/0xa0 [ 31.031096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.031743] remove_vma+0x139/0x170 [ 31.032205] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.032767] do_vmi_munmap+0x1f1/0x2b0 [ 31.033275] __vm_munmap+0x138/0x3a0 [ 31.033771] __x64_sys_munmap+0x59/0x80 [ 31.034286] do_syscall_64+0x3f/0x90 [ 31.034765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035484] [ 31.035702] The buggy address belongs to the object at ffff888018267658 [ 31.035702] which belongs to the cache vm_area_struct of size 168 [ 31.037183] The buggy address is located 88 bytes inside of [ 31.037183] freed 168-byte region [ffff888018267658, ffff888018267700) [ 31.038629] [ 31.038892] The buggy address belongs to the physical page: [ 31.039574] page:00000000e0ba677a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18267 [ 31.040682] memcg:ffff88801839bf01 [ 31.041128] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.041782] page_type: 0xffffffff() [ 31.042253] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.043248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801839bf01 [ 31.044167] page dumped because: kasan: bad access detected [ 31.044822] [ 31.045049] Memory state around the buggy address: [ 31.045622] ffff888018267580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.046503] ffff888018267600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.047430] >ffff888018267680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.048283] ^ [ 31.048861] ffff888018267700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.049750] ffff888018267780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.050613] ================================================================== [ 31.051670] Disabling lock debugging due to kernel taint [ 33.003976] BUG: Bad rss-counter state mm:000000005234331a type:MM_FILEPAGES val:33 [ 33.005147] BUG: Bad rss-counter state mm:000000005234331a type:MM_ANONPAGES val:22 [ 33.458959] BUG: Bad rss-counter state mm:000000009d0b0718 type:MM_FILEPAGES val:33 [ 33.459904] BUG: Bad rss-counter state mm:000000009d0b0718 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65131' (ECDSA) to the list of known hosts. 2023/06/21 06:31:03 fuzzer started 2023/06/21 06:31:04 dialing manager at localhost:36067 2023/06/21 06:31:04 checking machine... 2023/06/21 06:31:04 checking revisions... [ 34.194659] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:31:04 testing simple program... [ 34.243826] cgroup: Unknown subsys name 'net' [ 34.288101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:03 Registers: info registers vcpu 0 RAX=1ffffffff0ff33a6 RBX=000000000000004a RCX=dffffc0000000000 RDX=ffff8880177f1b40 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=000000000000004b RSP=ffff88800d1777c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d30 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c71 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 00007fb13a742900 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=00007fb13acf9618 CR3=0000000010060000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c04400 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=00007ffd2d1d0ea8 CR3=0000000005482000 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=00007f5d5464a51000005573ca8cf790 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