syzkaller login: [ 38.697622] BUG: Bad rss-counter state mm:0000000058cab247 type:MM_FILEPAGES val:33 [ 38.698774] BUG: Bad rss-counter state mm:0000000058cab247 type:MM_ANONPAGES val:22 [ 38.861158] ================================================================== [ 38.862092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.863038] Read of size 8 at addr ffff88800e0645c8 by task sshd/218 [ 38.863809] [ 38.864030] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.864978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.865994] Call Trace: [ 38.866313] [ 38.866597] dump_stack_lvl+0x91/0xf0 [ 38.867084] print_report+0xcc/0x620 [ 38.867586] ? __virt_addr_valid+0x102/0x340 [ 38.868141] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.868754] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869361] kasan_report+0xbe/0xf0 [ 38.869854] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870465] vma_interval_tree_remove+0xc75/0xec0 [ 38.871063] vma_prepare+0xc54/0x11a0 [ 38.871536] __split_vma+0x5af/0x950 [ 38.872005] ? __pfx___split_vma+0x10/0x10 [ 38.872528] ? find_held_lock+0x2c/0x110 [ 38.873046] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.873622] ? lock_is_held_type+0x9f/0x120 [ 38.874161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.874763] ? mtree_range_walk+0x632/0x900 [ 38.875315] ? mas_walk+0x5c7/0x7c0 [ 38.875790] do_vmi_munmap+0x1f1/0x2b0 [ 38.876275] mmap_region+0x1f9/0x2660 [ 38.876760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.877267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.877991] ? __pfx_lock_acquire+0x10/0x10 [ 38.878516] ? __pfx_mmap_region+0x10/0x10 [ 38.879037] ? security_mmap_addr+0x7d/0xa0 [ 38.879563] ? get_unmapped_area+0x1f5/0x3f0 [ 38.880104] do_mmap+0x854/0xf00 [ 38.880540] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.881031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.881593] ksys_mmap_pgoff+0x3af/0x500 [ 38.882097] do_syscall_64+0x3f/0x90 [ 38.882574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883222] RIP: 0033:0x7f8d63aefd82 [ 38.883671] 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 [ 38.885779] RSP: 002b:00007ffe8f251128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.886674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d63aefd82 [ 38.887523] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d62f29000 [ 38.888374] RBP: 00007f8d62f29000 R08: 0000000000000009 R09: 0000000000001000 [ 38.889224] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cf64bbf70 [ 38.890080] R13: 00007ffe8f251140 R14: 00007ffe8f251170 R15: 00007ffe8f2514d0 [ 38.890954] [ 38.891252] [ 38.891470] Allocated by task 211: [ 38.891899] kasan_save_stack+0x22/0x50 [ 38.892414] kasan_set_track+0x25/0x30 [ 38.892913] __kasan_slab_alloc+0x59/0x70 [ 38.893439] kmem_cache_alloc+0x16b/0x370 [ 38.893976] vm_area_dup+0x20/0x160 [ 38.894437] __split_vma+0x170/0x950 [ 38.894904] split_vma+0xc6/0x110 [ 38.895347] mprotect_fixup+0x8d2/0xb30 [ 38.895858] do_mprotect_pkey+0x87e/0xd40 [ 38.896385] __x64_sys_mprotect+0x78/0xc0 [ 38.896914] do_syscall_64+0x3f/0x90 [ 38.897398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898064] [ 38.898280] Freed by task 19: [ 38.898674] kasan_save_stack+0x22/0x50 [ 38.899176] kasan_set_track+0x25/0x30 [ 38.899672] kasan_save_free_info+0x2b/0x50 [ 38.900204] __kasan_slab_free+0x10a/0x190 [ 38.900732] kmem_cache_free+0x10d/0x4d0 [ 38.901240] rcu_core+0x8c8/0x2860 [ 38.901701] __do_softirq+0x1b7/0x7d4 [ 38.902181] [ 38.902396] Last potentially related work creation: [ 38.902979] kasan_save_stack+0x22/0x50 [ 38.903482] __kasan_record_aux_stack+0x8e/0xa0 [ 38.904058] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.904700] remove_vma+0x139/0x170 [ 38.905150] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.905725] do_vmi_munmap+0x1f1/0x2b0 [ 38.906208] __vm_munmap+0x138/0x3a0 [ 38.906674] __x64_sys_munmap+0x59/0x80 [ 38.907244] do_syscall_64+0x3f/0x90 [ 38.907717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908355] [ 38.908571] The buggy address belongs to the object at ffff88800e064570 [ 38.908571] which belongs to the cache vm_area_struct of size 168 [ 38.910037] The buggy address is located 88 bytes inside of [ 38.910037] freed 168-byte region [ffff88800e064570, ffff88800e064618) [ 38.911448] [ 38.911667] The buggy address belongs to the physical page: [ 38.912319] page:00000000447b83f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe064 [ 38.913392] memcg:ffff88800d9e1101 [ 38.913840] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.914529] page_type: 0xffffffff() [ 38.914986] raw: 0100000000000200 ffff8880087a0c80 ffffea00003906c0 dead000000000003 [ 38.915894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e1101 [ 38.916799] page dumped because: kasan: bad access detected [ 38.917453] [ 38.917676] Memory state around the buggy address: [ 38.918254] ffff88800e064480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.919106] ffff88800e064500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.919961] >ffff88800e064580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.920808] ^ [ 38.921470] ffff88800e064600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.922320] ffff88800e064680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.923166] ================================================================== [ 38.924121] Disabling lock debugging due to kernel taint [ 41.245557] BUG: Bad rss-counter state mm:00000000796b228f type:MM_FILEPAGES val:33 [ 41.246676] BUG: Bad rss-counter state mm:00000000796b228f type:MM_ANONPAGES val:22 [ 41.706238] BUG: Bad rss-counter state mm:000000001ceadeb7 type:MM_FILEPAGES val:33 [ 41.707387] BUG: Bad rss-counter state mm:000000001ceadeb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38898' (ECDSA) to the list of known hosts. 2023/06/20 17:09:58 fuzzer started 2023/06/20 17:09:59 dialing manager at localhost:36067 2023/06/20 17:09:59 checking machine... 2023/06/20 17:09:59 checking revisions... [ 42.488226] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:59 testing simple program... [ 42.540069] cgroup: Unknown subsys name 'net' [ 42.578637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:58 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=00007f908014fe20 CR3=000000000df14000 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=2038353a39303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff88800e849b40 RSI=ffffffff83c60be5 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888019f4f6a8 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000009 R11=00000a7600000a76 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff83c60bed 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 00007f93f2c31900 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=00007ffed1ff1000 CR3=000000001a110000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000