syzkaller login: [ 37.645529] BUG: Bad rss-counter state mm:000000003920f6c8 type:MM_FILEPAGES val:33 [ 37.646722] BUG: Bad rss-counter state mm:000000003920f6c8 type:MM_ANONPAGES val:22 [ 37.685795] ================================================================== [ 37.686786] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.687824] Read of size 8 at addr ffff88800eb71310 by task sshd/220 [ 37.688628] [ 37.688848] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.689732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.690714] Call Trace: [ 37.691036] <TASK> [ 37.691324] dump_stack_lvl+0x91/0xf0 [ 37.691843] print_report+0xcc/0x620 [ 37.692355] ? __virt_addr_valid+0x102/0x340 [ 37.692925] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.693547] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.694175] kasan_report+0xbe/0xf0 [ 37.694664] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.695283] vma_interval_tree_remove+0xc75/0xec0 [ 37.695913] vma_prepare+0xc54/0x11a0 [ 37.696416] __split_vma+0x5af/0x950 [ 37.696905] ? __pfx___split_vma+0x10/0x10 [ 37.697432] ? find_held_lock+0x2c/0x110 [ 37.697967] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.698543] ? lock_is_held_type+0x9f/0x120 [ 37.699098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.699735] ? mtree_range_walk+0x632/0x900 [ 37.700312] ? mas_walk+0x5c7/0x7c0 [ 37.700808] do_vmi_munmap+0x1f1/0x2b0 [ 37.701304] mmap_region+0x1f9/0x2660 [ 37.701798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.702308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.703043] ? __pfx_lock_acquire+0x10/0x10 [ 37.703602] ? __pfx_mmap_region+0x10/0x10 [ 37.704176] ? security_mmap_addr+0x7d/0xa0 [ 37.704887] ? get_unmapped_area+0x1f5/0x3f0 [ 37.705613] do_mmap+0x854/0xf00 [ 37.706196] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.706853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.707602] ksys_mmap_pgoff+0x3af/0x500 [ 37.708330] do_syscall_64+0x3f/0x90 [ 37.708972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.709829] RIP: 0033:0x7f464b081d82 [ 37.710305] 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 [ 37.712469] RSP: 002b:00007ffd8e13c2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.713393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f464b081d82 [ 37.714259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f464a4bb000 [ 37.715119] RBP: 00007f464a4bb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.716018] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0e2098980 [ 37.716897] R13: 00007ffd8e13c2d0 R14: 00007ffd8e13c300 R15: 00007ffd8e13c660 [ 37.717766] </TASK> [ 37.718058] [ 37.718275] Allocated by task 213: [ 37.718714] kasan_save_stack+0x22/0x50 [ 37.719218] kasan_set_track+0x25/0x30 [ 37.719736] __kasan_slab_alloc+0x59/0x70 [ 37.720290] kmem_cache_alloc+0x16b/0x370 [ 37.720821] vm_area_dup+0x20/0x160 [ 37.721279] __split_vma+0x170/0x950 [ 37.721769] split_vma+0xc6/0x110 [ 37.722206] mprotect_fixup+0x8d2/0xb30 [ 37.722732] do_mprotect_pkey+0x87e/0xd40 [ 37.723261] __x64_sys_mprotect+0x78/0xc0 [ 37.723814] do_syscall_64+0x3f/0x90 [ 37.724311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.724978] [ 37.725197] Freed by task 213: [ 37.725598] kasan_save_stack+0x22/0x50 [ 37.726105] kasan_set_track+0x25/0x30 [ 37.726636] kasan_save_free_info+0x2b/0x50 [ 37.727180] __kasan_slab_free+0x10a/0x190 [ 37.727738] kmem_cache_free+0x10d/0x4d0 [ 37.728273] rcu_core+0x8c8/0x2860 [ 37.728735] __do_softirq+0x1b7/0x7d4 [ 37.729216] [ 37.729429] Last potentially related work creation: [ 37.730033] kasan_save_stack+0x22/0x50 [ 37.730551] __kasan_record_aux_stack+0x8e/0xa0 [ 37.731148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.731826] remove_vma+0x139/0x170 [ 37.732300] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.732875] do_vmi_munmap+0x1f1/0x2b0 [ 37.733368] __vm_munmap+0x138/0x3a0 [ 37.733847] __x64_sys_munmap+0x59/0x80 [ 37.734348] do_syscall_64+0x3f/0x90 [ 37.734837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.735481] [ 37.735727] Second to last potentially related work creation: [ 37.736439] kasan_save_stack+0x22/0x50 [ 37.736964] __kasan_record_aux_stack+0x8e/0xa0 [ 37.737553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.738206] remove_vma+0x139/0x170 [ 37.738678] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.739235] do_vmi_munmap+0x1f1/0x2b0 [ 37.739763] mmap_region+0x1f9/0x2660 [ 37.740262] do_mmap+0x854/0xf00 [ 37.740709] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.741213] ksys_mmap_pgoff+0x3af/0x500 [ 37.741728] do_syscall_64+0x3f/0x90 [ 37.742213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.742881] [ 37.743102] The buggy address belongs to the object at ffff88800eb712b8 [ 37.743102] which belongs to the cache vm_area_struct of size 168 [ 37.744806] The buggy address is located 88 bytes inside of [ 37.744806] freed 168-byte region [ffff88800eb712b8, ffff88800eb71360) [ 37.746501] [ 37.746761] The buggy address belongs to the physical page: [ 37.747544] page:00000000a0ef634c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb71 [ 37.748858] memcg:ffff88800e475e01 [ 37.749370] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.750136] page_type: 0xffffffff() [ 37.750671] raw: 0100000000000200 ffff88800879fc80 ffffea0000386940 dead000000000002 [ 37.751759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e475e01 [ 37.752842] page dumped because: kasan: bad access detected [ 37.753628] [ 37.753883] Memory state around the buggy address: [ 37.754563] ffff88800eb71200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.755576] ffff88800eb71280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.756592] >ffff88800eb71300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.757597] ^ [ 37.758152] ffff88800eb71380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.759169] ffff88800eb71400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.760208] ================================================================== [ 37.761426] Disabling lock debugging due to kernel taint [ 39.766800] BUG: Bad rss-counter state mm:00000000628fe09a type:MM_FILEPAGES val:33 [ 39.767787] BUG: Bad rss-counter state mm:00000000628fe09a type:MM_ANONPAGES val:22 [ 40.244007] BUG: Bad rss-counter state mm:0000000082392bde type:MM_FILEPAGES val:33 [ 40.245199] BUG: Bad rss-counter state mm:0000000082392bde type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37366' (ECDSA) to the list of known hosts. 2023/06/19 17:06:22 fuzzer started 2023/06/19 17:06:22 dialing manager at localhost:44161 2023/06/19 17:06:22 checking machine... 2023/06/19 17:06:22 checking revisions... [ 40.944755] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:06:22 testing simple program... [ 40.995257] cgroup: Unknown subsys name 'net' [ 41.051438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:06:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f4fc1fb1000 CR3=000000000e708000 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=2031323a36303a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=ffff88806cf2c250 RCX=0000000000000000 RDX=ffff8880147d51c0 RSI=ffff88806cf2ba10 RDI=ffff88806cf2c250 RBP=ffff88806cf2ba10 RSP=ffff88806cf09e18 R8 =0000000000000006 R9 =ffff88806cf2c5a0 R10=ffff88806cf2c250 R11=ffff88806cf09ff8 R12=ffff88806cf2ba18 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff844cc1b4 RFL=00000046 [---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 00007fef844ee900 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=00007ffe15037000 CR3=0000000019ab8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000