syzkaller login: [ 30.590289] BUG: Bad rss-counter state mm:000000004b8f6762 type:MM_FILEPAGES val:33 [ 30.591295] BUG: Bad rss-counter state mm:000000004b8f6762 type:MM_ANONPAGES val:22 [ 30.760642] ================================================================== [ 30.761563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762499] Read of size 8 at addr ffff88801a34c4e0 by task sshd/220 [ 30.763276] [ 30.763493] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.764471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.765453] Call Trace: [ 30.765780] [ 30.766076] dump_stack_lvl+0x91/0xf0 [ 30.766582] print_report+0xcc/0x620 [ 30.767073] ? __virt_addr_valid+0x102/0x340 [ 30.767625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768265] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768909] kasan_report+0xbe/0xf0 [ 30.769396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770026] vma_interval_tree_remove+0xc75/0xec0 [ 30.770636] vma_prepare+0xc54/0x11a0 [ 30.771120] __split_vma+0x5af/0x950 [ 30.771588] ? __pfx___split_vma+0x10/0x10 [ 30.772122] ? find_held_lock+0x2c/0x110 [ 30.772642] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773215] ? lock_is_held_type+0x9f/0x120 [ 30.773759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.774368] ? mtree_range_walk+0x632/0x900 [ 30.774923] ? mas_walk+0x5c7/0x7c0 [ 30.775406] do_vmi_munmap+0x1f1/0x2b0 [ 30.775900] mmap_region+0x1f9/0x2660 [ 30.776412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777643] ? __pfx_lock_acquire+0x10/0x10 [ 30.778194] ? __pfx_mmap_region+0x10/0x10 [ 30.778730] ? security_mmap_addr+0x7d/0xa0 [ 30.779279] ? get_unmapped_area+0x1f5/0x3f0 [ 30.779837] do_mmap+0x854/0xf00 [ 30.780295] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.780805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.781380] ksys_mmap_pgoff+0x3af/0x500 [ 30.781888] do_syscall_64+0x3f/0x90 [ 30.782373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783025] RIP: 0033:0x7fc97f33bd82 [ 30.783493] 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 [ 30.785671] RSP: 002b:00007ffe02c0c378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.786595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc97f33bd82 [ 30.787453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc97e775000 [ 30.788338] RBP: 00007fc97e775000 R08: 0000000000000009 R09: 0000000000001000 [ 30.789190] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a641e8bec0 [ 30.790058] R13: 00007ffe02c0c390 R14: 00007ffe02c0c3c0 R15: 00007ffe02c0c720 [ 30.790925] [ 30.791221] [ 30.791440] Allocated by task 213: [ 30.791872] kasan_save_stack+0x22/0x50 [ 30.792398] kasan_set_track+0x25/0x30 [ 30.792891] __kasan_slab_alloc+0x59/0x70 [ 30.793427] kmem_cache_alloc+0x16b/0x370 [ 30.793953] vm_area_dup+0x20/0x160 [ 30.794405] __split_vma+0x170/0x950 [ 30.794879] split_vma+0xc6/0x110 [ 30.795331] mprotect_fixup+0x8d2/0xb30 [ 30.795847] do_mprotect_pkey+0x87e/0xd40 [ 30.796385] __x64_sys_mprotect+0x78/0xc0 [ 30.796912] do_syscall_64+0x3f/0x90 [ 30.797394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798049] [ 30.798280] Freed by task 13: [ 30.798671] kasan_save_stack+0x22/0x50 [ 30.799191] kasan_set_track+0x25/0x30 [ 30.799698] kasan_save_free_info+0x2b/0x50 [ 30.800256] __kasan_slab_free+0x10a/0x190 [ 30.800794] kmem_cache_free+0x10d/0x4d0 [ 30.801315] rcu_core+0x8c8/0x2860 [ 30.801765] __do_softirq+0x1b7/0x7d4 [ 30.802253] [ 30.802482] Last potentially related work creation: [ 30.803081] kasan_save_stack+0x22/0x50 [ 30.803594] __kasan_record_aux_stack+0x8e/0xa0 [ 30.804177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.804818] remove_vma+0x139/0x170 [ 30.805275] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.805835] do_vmi_munmap+0x1f1/0x2b0 [ 30.806325] __vm_munmap+0x138/0x3a0 [ 30.806799] __x64_sys_munmap+0x59/0x80 [ 30.807299] do_syscall_64+0x3f/0x90 [ 30.807792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808468] [ 30.808685] The buggy address belongs to the object at ffff88801a34c488 [ 30.808685] which belongs to the cache vm_area_struct of size 168 [ 30.810172] The buggy address is located 88 bytes inside of [ 30.810172] freed 168-byte region [ffff88801a34c488, ffff88801a34c530) [ 30.811578] [ 30.811798] The buggy address belongs to the physical page: [ 30.812484] page:000000004b69c534 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a34c [ 30.813588] memcg:ffff88801a3f2c01 [ 30.814022] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.814687] page_type: 0xffffffff() [ 30.815142] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.816077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f2c01 [ 30.816999] page dumped because: kasan: bad access detected [ 30.817668] [ 30.817890] Memory state around the buggy address: [ 30.818483] ffff88801a34c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.819354] ffff88801a34c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.820240] >ffff88801a34c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.821112] ^ [ 30.821880] ffff88801a34c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.822753] ffff88801a34c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823622] ================================================================== [ 30.825035] Disabling lock debugging due to kernel taint [ 32.797757] BUG: Bad rss-counter state mm:00000000bbdfe0ab type:MM_FILEPAGES val:33 [ 32.798815] BUG: Bad rss-counter state mm:00000000bbdfe0ab type:MM_ANONPAGES val:22 [ 33.227018] BUG: Bad rss-counter state mm:0000000037cdaab5 type:MM_FILEPAGES val:33 [ 33.228229] BUG: Bad rss-counter state mm:0000000037cdaab5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45078' (ECDSA) to the list of known hosts. 2023/06/20 18:00:24 fuzzer started 2023/06/20 18:00:25 dialing manager at localhost:36067 2023/06/20 18:00:25 checking machine... 2023/06/20 18:00:25 checking revisions... [ 33.947190] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:00:25 testing simple program... [ 33.993177] cgroup: Unknown subsys name 'net' [ 34.046339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:24 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=00007f7cdd064860 CR3=00000000158ee000 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=2034323a30303a3831203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a323030383420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006098 RSI=000000000000132f RDI=ffffffff86098098 RBP=ffff8880142e7a98 RSP=ffff8880142e7980 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880142e7aa0 R13=ffff8880142e7a88 R14=ffff8880142e7a81 R15=ffff8880142e7a40 RIP=ffffffff81130861 RFL=00000293 [--S-A-C] 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 00007f388bdf2900 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=00007f388c3a9618 CR3=000000000ead4000 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=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