syzkaller login: [ 32.425841] BUG: Bad rss-counter state mm:00000000046b5443 type:MM_FILEPAGES val:33 [ 32.427019] BUG: Bad rss-counter state mm:00000000046b5443 type:MM_ANONPAGES val:22 [ 32.588200] ================================================================== [ 32.589265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.590185] Read of size 8 at addr ffff88800e177880 by task sshd/219 [ 32.591076] [ 32.591289] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.592154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.593122] Call Trace: [ 32.593432] [ 32.593727] dump_stack_lvl+0x91/0xf0 [ 32.594207] print_report+0xcc/0x620 [ 32.594687] ? __virt_addr_valid+0x102/0x340 [ 32.595236] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.595911] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.596743] kasan_report+0xbe/0xf0 [ 32.597394] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.598229] vma_interval_tree_remove+0xc75/0xec0 [ 32.599049] vma_prepare+0xc54/0x11a0 [ 32.599565] __split_vma+0x5af/0x950 [ 32.600049] ? __pfx___split_vma+0x10/0x10 [ 32.600567] ? find_held_lock+0x2c/0x110 [ 32.601083] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.601643] ? lock_is_held_type+0x9f/0x120 [ 32.602177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.602777] ? mtree_range_walk+0x632/0x900 [ 32.603317] ? mas_walk+0x5c7/0x7c0 [ 32.603796] do_vmi_munmap+0x1f1/0x2b0 [ 32.604279] mmap_region+0x1f9/0x2660 [ 32.604757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.605270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.605959] ? __pfx_lock_acquire+0x10/0x10 [ 32.606493] ? __pfx_mmap_region+0x10/0x10 [ 32.607022] ? security_mmap_addr+0x7d/0xa0 [ 32.607544] ? get_unmapped_area+0x1f5/0x3f0 [ 32.608109] do_mmap+0x854/0xf00 [ 32.608544] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.609037] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.609596] ksys_mmap_pgoff+0x3af/0x500 [ 32.610096] do_syscall_64+0x3f/0x90 [ 32.610572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.611203] RIP: 0033:0x7f76d5da2d82 [ 32.611654] 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 [ 32.613738] RSP: 002b:00007ffc32101b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.614645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76d5da2d82 [ 32.615468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76d51dc000 [ 32.616316] RBP: 00007f76d51dc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.617147] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc6c0e7ec0 [ 32.617974] R13: 00007ffc32101b30 R14: 00007ffc32101b60 R15: 00007ffc32101ec0 [ 32.618809] [ 32.619101] [ 32.619307] Allocated by task 212: [ 32.619726] kasan_save_stack+0x22/0x50 [ 32.620240] kasan_set_track+0x25/0x30 [ 32.620723] __kasan_slab_alloc+0x59/0x70 [ 32.621239] kmem_cache_alloc+0x16b/0x370 [ 32.621748] vm_area_dup+0x20/0x160 [ 32.622200] __split_vma+0x170/0x950 [ 32.622646] split_vma+0xc6/0x110 [ 32.623076] mprotect_fixup+0x8d2/0xb30 [ 32.623587] do_mprotect_pkey+0x87e/0xd40 [ 32.624113] __x64_sys_mprotect+0x78/0xc0 [ 32.624626] do_syscall_64+0x3f/0x90 [ 32.625098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.625730] [ 32.625946] Freed by task 203: [ 32.626330] kasan_save_stack+0x22/0x50 [ 32.626835] kasan_set_track+0x25/0x30 [ 32.627324] kasan_save_free_info+0x2b/0x50 [ 32.627865] __kasan_slab_free+0x10a/0x190 [ 32.628402] kmem_cache_free+0x10d/0x4d0 [ 32.628909] rcu_core+0x8c8/0x2860 [ 32.629347] __do_softirq+0x1b7/0x7d4 [ 32.629820] [ 32.630027] Last potentially related work creation: [ 32.630600] kasan_save_stack+0x22/0x50 [ 32.631096] __kasan_record_aux_stack+0x8e/0xa0 [ 32.631662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.632313] remove_vma+0x139/0x170 [ 32.632747] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.633290] do_vmi_munmap+0x1f1/0x2b0 [ 32.633765] __vm_munmap+0x138/0x3a0 [ 32.634236] __x64_sys_munmap+0x59/0x80 [ 32.634722] do_syscall_64+0x3f/0x90 [ 32.635185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.635822] [ 32.636041] Second to last potentially related work creation: [ 32.636713] kasan_save_stack+0x22/0x50 [ 32.637215] __kasan_record_aux_stack+0x8e/0xa0 [ 32.637783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.638420] remove_vma+0x139/0x170 [ 32.638863] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.639416] do_vmi_munmap+0x1f1/0x2b0 [ 32.639909] mmap_region+0x1f9/0x2660 [ 32.640377] do_mmap+0x854/0xf00 [ 32.640802] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.641281] ksys_mmap_pgoff+0x3af/0x500 [ 32.641781] do_syscall_64+0x3f/0x90 [ 32.642243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.642876] [ 32.643083] The buggy address belongs to the object at ffff88800e177828 [ 32.643083] which belongs to the cache vm_area_struct of size 168 [ 32.644540] The buggy address is located 88 bytes inside of [ 32.644540] freed 168-byte region [ffff88800e177828, ffff88800e1778d0) [ 32.645932] [ 32.646140] The buggy address belongs to the physical page: [ 32.646786] page:00000000ebdb7af4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe177 [ 32.647863] memcg:ffff88800e186a01 [ 32.648273] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.648901] page_type: 0xffffffff() [ 32.649337] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b3b40 dead000000000002 [ 32.650252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e186a01 [ 32.651147] page dumped because: kasan: bad access detected [ 32.651799] [ 32.652012] Memory state around the buggy address: [ 32.652589] ffff88800e177780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.653417] ffff88800e177800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.654258] >ffff88800e177880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.655091] ^ [ 32.655499] ffff88800e177900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.656354] ffff88800e177980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.657182] ================================================================== [ 32.658240] Disabling lock debugging due to kernel taint [ 34.919956] BUG: Bad rss-counter state mm:0000000019ad44dc type:MM_FILEPAGES val:33 [ 34.921124] BUG: Bad rss-counter state mm:0000000019ad44dc type:MM_ANONPAGES val:22 [ 35.374082] BUG: Bad rss-counter state mm:000000003d0b4074 type:MM_FILEPAGES val:33 [ 35.375216] BUG: Bad rss-counter state mm:000000003d0b4074 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36592' (ECDSA) to the list of known hosts. 2023/06/21 06:53:20 fuzzer started 2023/06/21 06:53:21 dialing manager at localhost:36067 2023/06/21 06:53:21 checking machine... 2023/06/21 06:53:21 checking revisions... [ 36.017637] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:53:21 testing simple program... [ 36.069638] cgroup: Unknown subsys name 'net' [ 36.122721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:53:20 Registers: info registers vcpu 0 RAX=00007ffcdd2c8ed0 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000002 RSI=0000000000000000 RDI=ffff8880147dff78 RBP=ffff8880147df29a RSP=ffff8880147df1e8 R8 =ffffffff864bbb58 R9 =ffff8880147df298 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880147dff58 R13=ffff8880147df2a0 R14=ffff8880147dff58 R15=ffff8880147df258 RIP=ffffffff81131eec 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 00007f0a2709a900 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=00007f0a27651618 CR3=000000000d69e000 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=00007f1723b57210 CR3=0000000016058000 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=2030323a33353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a33353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000