syzkaller login: [ 38.824099] BUG: Bad rss-counter state mm:000000005aa8808f type:MM_FILEPAGES val:33 [ 38.825096] BUG: Bad rss-counter state mm:000000005aa8808f type:MM_ANONPAGES val:22 [ 38.860566] ================================================================== [ 38.861836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.863081] Read of size 8 at addr ffff8880099aaed8 by task sshd/219 [ 38.864089] [ 38.864357] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.865527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.866716] Call Trace: [ 38.867067] [ 38.867395] dump_stack_lvl+0x91/0xf0 [ 38.867889] print_report+0xcc/0x620 [ 38.868407] ? __virt_addr_valid+0x102/0x340 [ 38.869057] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869680] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870298] kasan_report+0xbe/0xf0 [ 38.870773] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871490] vma_interval_tree_remove+0xc75/0xec0 [ 38.872127] vma_prepare+0xc54/0x11a0 [ 38.872702] __split_vma+0x5af/0x950 [ 38.873276] ? __pfx___split_vma+0x10/0x10 [ 38.873824] ? find_held_lock+0x2c/0x110 [ 38.874434] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.875057] ? lock_is_held_type+0x9f/0x120 [ 38.875664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876386] ? mtree_range_walk+0x632/0x900 [ 38.876940] ? mas_walk+0x5c7/0x7c0 [ 38.877413] do_vmi_munmap+0x1f1/0x2b0 [ 38.877914] mmap_region+0x1f9/0x2660 [ 38.878394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.878906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.879614] ? __pfx_lock_acquire+0x10/0x10 [ 38.880138] ? __pfx_mmap_region+0x10/0x10 [ 38.880668] ? security_mmap_addr+0x7d/0xa0 [ 38.881196] ? get_unmapped_area+0x1f5/0x3f0 [ 38.881757] do_mmap+0x854/0xf00 [ 38.882191] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.882686] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.883255] ksys_mmap_pgoff+0x3af/0x500 [ 38.883763] do_syscall_64+0x3f/0x90 [ 38.884244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884891] RIP: 0033:0x7fc6882a9d82 [ 38.885346] 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 [ 38.887509] RSP: 002b:00007fff69126d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.888417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6882a9d82 [ 38.889265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6876e3000 [ 38.890139] RBP: 00007fc6876e3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.890988] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639e6e46ec0 [ 38.891836] R13: 00007fff69126d30 R14: 00007fff69126d60 R15: 00007fff691270c0 [ 38.892694] [ 38.892983] [ 38.893197] Allocated by task 212: [ 38.893644] kasan_save_stack+0x22/0x50 [ 38.894154] kasan_set_track+0x25/0x30 [ 38.894644] __kasan_slab_alloc+0x59/0x70 [ 38.895170] kmem_cache_alloc+0x16b/0x370 [ 38.895683] vm_area_dup+0x20/0x160 [ 38.896133] __split_vma+0x170/0x950 [ 38.896594] split_vma+0xc6/0x110 [ 38.897035] mprotect_fixup+0x8d2/0xb30 [ 38.897537] do_mprotect_pkey+0x87e/0xd40 [ 38.898078] __x64_sys_mprotect+0x78/0xc0 [ 38.898599] do_syscall_64+0x3f/0x90 [ 38.899078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899728] [ 38.899944] Freed by task 212: [ 38.900338] kasan_save_stack+0x22/0x50 [ 38.900847] kasan_set_track+0x25/0x30 [ 38.901344] kasan_save_free_info+0x2b/0x50 [ 38.901889] __kasan_slab_free+0x10a/0x190 [ 38.902420] kmem_cache_free+0x10d/0x4d0 [ 38.902931] rcu_core+0x8c8/0x2860 [ 38.903372] __do_softirq+0x1b7/0x7d4 [ 38.903854] [ 38.904068] Last potentially related work creation: [ 38.904657] kasan_save_stack+0x22/0x50 [ 38.905217] __kasan_record_aux_stack+0x8e/0xa0 [ 38.905804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.906455] remove_vma+0x139/0x170 [ 38.906911] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.907463] do_vmi_munmap+0x1f1/0x2b0 [ 38.907950] __vm_munmap+0x138/0x3a0 [ 38.908419] __x64_sys_munmap+0x59/0x80 [ 38.908916] do_syscall_64+0x3f/0x90 [ 38.909391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910044] [ 38.910258] The buggy address belongs to the object at ffff8880099aae80 [ 38.910258] which belongs to the cache vm_area_struct of size 168 [ 38.911730] The buggy address is located 88 bytes inside of [ 38.911730] freed 168-byte region [ffff8880099aae80, ffff8880099aaf28) [ 38.913134] [ 38.913349] The buggy address belongs to the physical page: [ 38.914024] page:000000004106722c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99aa [ 38.915099] memcg:ffff88801ab6ad01 [ 38.915531] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.916177] page_type: 0xffffffff() [ 38.916630] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.917551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab6ad01 [ 38.918453] page dumped because: kasan: bad access detected [ 38.919105] [ 38.919322] Memory state around the buggy address: [ 38.919904] ffff8880099aad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.920759] ffff8880099aae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.921622] >ffff8880099aae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.922481] ^ [ 38.923208] ffff8880099aaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.924054] ffff8880099aaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.924912] ================================================================== [ 38.925964] Disabling lock debugging due to kernel taint [ 40.937044] BUG: Bad rss-counter state mm:0000000009e77e9a type:MM_FILEPAGES val:33 [ 40.938053] BUG: Bad rss-counter state mm:0000000009e77e9a type:MM_ANONPAGES val:22 [ 41.334687] BUG: Bad rss-counter state mm:0000000063a1cf68 type:MM_FILEPAGES val:33 [ 41.336006] BUG: Bad rss-counter state mm:0000000063a1cf68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47723' (ECDSA) to the list of known hosts. 2023/06/21 07:35:55 fuzzer started 2023/06/21 07:35:55 dialing manager at localhost:36067 2023/06/21 07:35:55 checking machine... 2023/06/21 07:35:55 checking revisions... [ 42.073619] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:35:55 testing simple program... [ 42.119907] cgroup: Unknown subsys name 'net' [ 42.157897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff9395dbc8 CR3=0000000005482000 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=00007f73ae810510000056121f20f790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e9f7558 RCX=0000000000000001 RDX=1ffff11001d3eeab RSI=ffffffff81976419 RDI=ffff88800e9f7564 RBP=0000000000000008 RSP=ffff88800e9f7470 R8 =0000000000000001 R9 =ffff88800e9f74d0 R10=0000000000038001 R11=0000000000025fc6 R12=ffff88800e9f7558 R13=0000000000000000 R14=ffff88800fdf3680 R15=0000000000000000 RIP=ffffffff813ad51f 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 00007faaa3f49700 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=00007f41f3ebb0d0 CR3=0000000019e7c000 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=2035353a35333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000