syzkaller login: [ 30.579184] BUG: Bad rss-counter state mm:0000000078f6798b type:MM_FILEPAGES val:33 [ 30.581256] BUG: Bad rss-counter state mm:0000000078f6798b type:MM_ANONPAGES val:22 [ 30.746813] ================================================================== [ 30.747968] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.749151] Read of size 8 at addr ffff88801029c228 by task sshd/220 [ 30.750246] [ 30.750520] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.751630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.752858] Call Trace: [ 30.753287] [ 30.753617] dump_stack_lvl+0x91/0xf0 [ 30.754107] print_report+0xcc/0x620 [ 30.754590] ? __virt_addr_valid+0x102/0x340 [ 30.755136] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756359] kasan_report+0xbe/0xf0 [ 30.756835] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757453] vma_interval_tree_remove+0xc75/0xec0 [ 30.758037] vma_prepare+0xc54/0x11a0 [ 30.758516] __split_vma+0x5af/0x950 [ 30.758985] ? __pfx___split_vma+0x10/0x10 [ 30.759498] ? find_held_lock+0x2c/0x110 [ 30.760020] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.760577] ? lock_is_held_type+0x9f/0x120 [ 30.761141] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.761748] ? mtree_range_walk+0x632/0x900 [ 30.762307] ? mas_walk+0x5c7/0x7c0 [ 30.762822] do_vmi_munmap+0x1f1/0x2b0 [ 30.763415] mmap_region+0x1f9/0x2660 [ 30.763970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.764573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.765412] ? __pfx_lock_acquire+0x10/0x10 [ 30.766043] ? __pfx_mmap_region+0x10/0x10 [ 30.766677] ? security_mmap_addr+0x7d/0xa0 [ 30.767299] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767941] do_mmap+0x854/0xf00 [ 30.768454] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.769047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.769693] ksys_mmap_pgoff+0x3af/0x500 [ 30.770282] do_syscall_64+0x3f/0x90 [ 30.770850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771611] RIP: 0033:0x7fee0bac1d82 [ 30.772144] 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 [ 30.774673] RSP: 002b:00007ffc3417ff88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.775744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee0bac1d82 [ 30.776728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee0aefb000 [ 30.777749] RBP: 00007fee0aefb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.778734] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cd77c8ec0 [ 30.779747] R13: 00007ffc3417ffa0 R14: 00007ffc3417ffd0 R15: 00007ffc34180330 [ 30.780769] [ 30.781135] [ 30.781387] Allocated by task 213: [ 30.781898] kasan_save_stack+0x22/0x50 [ 30.782486] kasan_set_track+0x25/0x30 [ 30.783062] __kasan_slab_alloc+0x59/0x70 [ 30.783684] kmem_cache_alloc+0x16b/0x370 [ 30.784295] vm_area_dup+0x20/0x160 [ 30.784834] __split_vma+0x170/0x950 [ 30.785379] split_vma+0xc6/0x110 [ 30.785879] mprotect_fixup+0x8d2/0xb30 [ 30.786466] do_mprotect_pkey+0x87e/0xd40 [ 30.787072] __x64_sys_mprotect+0x78/0xc0 [ 30.787674] do_syscall_64+0x3f/0x90 [ 30.788231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788991] [ 30.789243] Freed by task 213: [ 30.789704] kasan_save_stack+0x22/0x50 [ 30.790300] kasan_set_track+0x25/0x30 [ 30.790881] kasan_save_free_info+0x2b/0x50 [ 30.791507] __kasan_slab_free+0x10a/0x190 [ 30.792137] kmem_cache_free+0x10d/0x4d0 [ 30.792724] rcu_core+0x8c8/0x2860 [ 30.793264] __do_softirq+0x1b7/0x7d4 [ 30.793824] [ 30.794080] Last potentially related work creation: [ 30.794770] kasan_save_stack+0x22/0x50 [ 30.795354] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796785] remove_vma+0x139/0x170 [ 30.797317] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797962] do_vmi_munmap+0x1f1/0x2b0 [ 30.798545] __vm_munmap+0x138/0x3a0 [ 30.799081] __x64_sys_munmap+0x59/0x80 [ 30.799655] do_syscall_64+0x3f/0x90 [ 30.800211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800965] [ 30.801219] The buggy address belongs to the object at ffff88801029c1d0 [ 30.801219] which belongs to the cache vm_area_struct of size 168 [ 30.802931] The buggy address is located 88 bytes inside of [ 30.802931] freed 168-byte region [ffff88801029c1d0, ffff88801029c278) [ 30.804594] [ 30.804848] The buggy address belongs to the physical page: [ 30.805654] page:00000000a77c76f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029c [ 30.806919] memcg:ffff8880097b7101 [ 30.807418] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808187] page_type: 0xffffffff() [ 30.808720] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.809810] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097b7101 [ 30.810854] page dumped because: kasan: bad access detected [ 30.811633] [ 30.811882] Memory state around the buggy address: [ 30.812556] ffff88801029c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.813576] ffff88801029c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.814564] >ffff88801029c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.815571] ^ [ 30.816226] ffff88801029c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.817251] ffff88801029c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.818255] ================================================================== [ 30.819653] Disabling lock debugging due to kernel taint [ 32.950611] BUG: Bad rss-counter state mm:0000000064e97699 type:MM_FILEPAGES val:33 [ 32.952015] BUG: Bad rss-counter state mm:0000000064e97699 type:MM_ANONPAGES val:22 [ 33.532810] BUG: Bad rss-counter state mm:00000000ef91bd7c type:MM_FILEPAGES val:33 [ 33.533980] BUG: Bad rss-counter state mm:00000000ef91bd7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52992' (ECDSA) to the list of known hosts. 2023/06/20 20:00:02 fuzzer started 2023/06/20 20:00:02 dialing manager at localhost:36067 2023/06/20 20:00:02 checking machine... 2023/06/20 20:00:02 checking revisions... [ 34.186382] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:00:02 testing simple program... [ 34.242263] cgroup: Unknown subsys name 'net' [ 34.315403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880163c73c0 RCX=0000000000000001 RDX=1ffff11002c78e7a RSI=ffff8880163c7c20 RDI=ffff8880163c73d0 RBP=ffff8880163c7c20 RSP=ffff8880163c7318 R8 =ffffffff863b30ba R9 =ffff8880163c7400 R10=0000000000038001 R11=000000000008a89d R12=0000000000000008 R13=ffff8880163c0000 R14=ffff8880163c7c28 R15=ffff8880163c73c0 RIP=ffffffff81130468 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 00007fa9f9e71900 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=00007fa9f938f020 CR3=000000000ca54000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=acb9ed176d88847800000000000ae988 XMM05=ef7994ed86ba82ee0000000000132ee0 XMM06=19e9129bd510f2350000000000131d40 XMM07=fb795ef6d65770560000000000121f78 XMM08=4f5453444600273d67736d000d0a0920 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=00007f24e500e0b0 CR3=0000000019dc6000 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=2032303a30303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30303a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000