syzkaller login: [ 30.463627] BUG: Bad rss-counter state mm:0000000005c17a6d type:MM_FILEPAGES val:33 [ 30.464649] BUG: Bad rss-counter state mm:0000000005c17a6d type:MM_ANONPAGES val:22 [ 30.622664] ================================================================== [ 30.623576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.624514] Read of size 8 at addr ffff88800e7dbdf0 by task sshd/220 [ 30.625301] [ 30.625518] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.626516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.627522] Call Trace: [ 30.627848] [ 30.628132] dump_stack_lvl+0x91/0xf0 [ 30.628629] print_report+0xcc/0x620 [ 30.629121] ? __virt_addr_valid+0x102/0x340 [ 30.629667] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630947] kasan_report+0xbe/0xf0 [ 30.631433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632051] vma_interval_tree_remove+0xc75/0xec0 [ 30.632662] vma_prepare+0xc54/0x11a0 [ 30.633138] __split_vma+0x5af/0x950 [ 30.633609] ? __pfx___split_vma+0x10/0x10 [ 30.634134] ? find_held_lock+0x2c/0x110 [ 30.634661] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.635228] ? lock_is_held_type+0x9f/0x120 [ 30.635774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.636381] ? mtree_range_walk+0x632/0x900 [ 30.636933] ? mas_walk+0x5c7/0x7c0 [ 30.637415] do_vmi_munmap+0x1f1/0x2b0 [ 30.637906] mmap_region+0x1f9/0x2660 [ 30.638384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.638916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.639638] ? __pfx_lock_acquire+0x10/0x10 [ 30.640169] ? __pfx_mmap_region+0x10/0x10 [ 30.640712] ? security_mmap_addr+0x7d/0xa0 [ 30.641242] ? get_unmapped_area+0x1f5/0x3f0 [ 30.641787] do_mmap+0x854/0xf00 [ 30.642229] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.642732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.643293] ksys_mmap_pgoff+0x3af/0x500 [ 30.643798] do_syscall_64+0x3f/0x90 [ 30.644275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.644924] RIP: 0033:0x7efde05d0d82 [ 30.645377] 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 [ 30.647518] RSP: 002b:00007ffd8053e5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.648414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efde05d0d82 [ 30.649261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efddfa0a000 [ 30.650098] RBP: 00007efddfa0a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.650972] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560926f5af70 [ 30.651823] R13: 00007ffd8053e600 R14: 00007ffd8053e630 R15: 00007ffd8053e990 [ 30.652681] [ 30.652970] [ 30.653187] Allocated by task 213: [ 30.653622] kasan_save_stack+0x22/0x50 [ 30.654132] kasan_set_track+0x25/0x30 [ 30.654631] __kasan_slab_alloc+0x59/0x70 [ 30.655153] kmem_cache_alloc+0x16b/0x370 [ 30.655666] vm_area_dup+0x20/0x160 [ 30.656131] __split_vma+0x170/0x950 [ 30.656595] split_vma+0xc6/0x110 [ 30.657039] mprotect_fixup+0x8d2/0xb30 [ 30.657544] do_mprotect_pkey+0x87e/0xd40 [ 30.658064] __x64_sys_mprotect+0x78/0xc0 [ 30.658583] do_syscall_64+0x3f/0x90 [ 30.659077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659726] [ 30.659939] Freed by task 213: [ 30.660337] kasan_save_stack+0x22/0x50 [ 30.660846] kasan_set_track+0x25/0x30 [ 30.661339] kasan_save_free_info+0x2b/0x50 [ 30.661869] __kasan_slab_free+0x10a/0x190 [ 30.662403] kmem_cache_free+0x10d/0x4d0 [ 30.662917] rcu_core+0x8c8/0x2860 [ 30.663364] __do_softirq+0x1b7/0x7d4 [ 30.663855] [ 30.664068] Last potentially related work creation: [ 30.664659] kasan_save_stack+0x22/0x50 [ 30.665158] __kasan_record_aux_stack+0x8e/0xa0 [ 30.665736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.666381] remove_vma+0x139/0x170 [ 30.666860] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.667469] do_vmi_munmap+0x1f1/0x2b0 [ 30.667960] __vm_munmap+0x138/0x3a0 [ 30.668432] __x64_sys_munmap+0x59/0x80 [ 30.668929] do_syscall_64+0x3f/0x90 [ 30.669412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670045] [ 30.670257] Second to last potentially related work creation: [ 30.670956] kasan_save_stack+0x22/0x50 [ 30.671457] __kasan_record_aux_stack+0x8e/0xa0 [ 30.672030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.672680] remove_vma+0x139/0x170 [ 30.673141] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.673700] do_vmi_munmap+0x1f1/0x2b0 [ 30.674184] mmap_region+0x1f9/0x2660 [ 30.674666] do_mmap+0x854/0xf00 [ 30.675094] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.675581] ksys_mmap_pgoff+0x7d/0x500 [ 30.676075] do_syscall_64+0x3f/0x90 [ 30.676548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677192] [ 30.677408] The buggy address belongs to the object at ffff88800e7dbd98 [ 30.677408] which belongs to the cache vm_area_struct of size 168 [ 30.678918] The buggy address is located 88 bytes inside of [ 30.678918] freed 168-byte region [ffff88800e7dbd98, ffff88800e7dbe40) [ 30.680369] [ 30.680592] The buggy address belongs to the physical page: [ 30.681280] page:0000000060588875 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7db [ 30.682399] memcg:ffff888009038a01 [ 30.682855] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.683527] page_type: 0xffffffff() [ 30.683990] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.684942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009038a01 [ 30.685886] page dumped because: kasan: bad access detected [ 30.686571] [ 30.686811] Memory state around the buggy address: [ 30.687411] ffff88800e7dbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.688299] ffff88800e7dbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.689187] >ffff88800e7dbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.690075] ^ [ 30.690915] ffff88800e7dbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.691798] ffff88800e7dbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.692675] ================================================================== [ 30.693618] Disabling lock debugging due to kernel taint [ 32.445085] BUG: Bad rss-counter state mm:000000003946b98d type:MM_FILEPAGES val:33 [ 32.445818] BUG: Bad rss-counter state mm:000000003946b98d type:MM_ANONPAGES val:22 [ 32.916996] BUG: Bad rss-counter state mm:00000000b1a6395a type:MM_FILEPAGES val:33 [ 32.918202] BUG: Bad rss-counter state mm:00000000b1a6395a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40377' (ECDSA) to the list of known hosts. 2023/06/20 11:30:48 fuzzer started 2023/06/20 11:30:48 dialing manager at localhost:36067 2023/06/20 11:30:48 checking machine... 2023/06/20 11:30:48 checking revisions... [ 33.638912] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:30:49 testing simple program... [ 33.699292] cgroup: Unknown subsys name 'net' [ 33.755191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:48 Registers: info registers vcpu 0 RAX=ffffffff8186bb7b RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003938f5f RSI=ffff88801c9c7e90 RDI=ffffffff8186bb7b RBP=ffff88801c9c7af8 RSP=ffff88801c9c7a90 R8 =0000000000000001 R9 =ffff88801c9c7ae0 R10=0000000000038001 R11=0000000000009755 R12=ffff88801c9c7b68 R13=0000000000000000 R14=ffff8880165a3680 R15=dffffc0000000000 RIP=ffffffff811303b9 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 00007f0915fbe900 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=00007f0916575618 CR3=0000000018c84000 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=563412feff00545000000000000080fe 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=00007fc78973a700 CR3=000000000e824000 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=2038343a30333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000