syzkaller login: [ 33.250637] BUG: Bad rss-counter state mm:00000000274800ff type:MM_FILEPAGES val:33 [ 33.251907] BUG: Bad rss-counter state mm:00000000274800ff type:MM_ANONPAGES val:22 [ 33.288752] ================================================================== [ 33.289666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.290735] Read of size 8 at addr ffff88800effe310 by task sshd/220 [ 33.291518] [ 33.291742] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.292657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.293649] Call Trace: [ 33.293986] [ 33.294283] dump_stack_lvl+0x91/0xf0 [ 33.295035] print_report+0xcc/0x620 [ 33.295606] ? __virt_addr_valid+0x102/0x340 [ 33.296270] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.297012] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.297731] kasan_report+0xbe/0xf0 [ 33.298348] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.299141] vma_interval_tree_remove+0xc75/0xec0 [ 33.299907] vma_prepare+0xc54/0x11a0 [ 33.300508] __split_vma+0x5af/0x950 [ 33.301093] ? __pfx___split_vma+0x10/0x10 [ 33.301740] ? find_held_lock+0x2c/0x110 [ 33.302383] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.303082] ? lock_is_held_type+0x9f/0x120 [ 33.303745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.304492] ? mtree_range_walk+0x632/0x900 [ 33.305172] ? mas_walk+0x5c7/0x7c0 [ 33.305753] do_vmi_munmap+0x1f1/0x2b0 [ 33.306383] mmap_region+0x1f9/0x2660 [ 33.306978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.307608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.308486] ? __pfx_lock_acquire+0x10/0x10 [ 33.309150] ? __pfx_mmap_region+0x10/0x10 [ 33.309808] ? security_mmap_addr+0x7d/0xa0 [ 33.310492] ? get_unmapped_area+0x1f5/0x3f0 [ 33.311166] do_mmap+0x854/0xf00 [ 33.311601] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.312091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.312643] ksys_mmap_pgoff+0x3af/0x500 [ 33.313148] do_syscall_64+0x3f/0x90 [ 33.313613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.314257] RIP: 0033:0x7faa2603dd82 [ 33.314716] 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 [ 33.316800] RSP: 002b:00007ffcccfe6ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.317693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa2603dd82 [ 33.318556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa25477000 [ 33.319394] RBP: 00007faa25477000 R08: 0000000000000009 R09: 0000000000001000 [ 33.320228] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a88b3ef60 [ 33.321072] R13: 00007ffcccfe6bc0 R14: 00007ffcccfe6bf0 R15: 00007ffcccfe6f50 [ 33.321924] [ 33.322211] [ 33.322433] Allocated by task 213: [ 33.322862] kasan_save_stack+0x22/0x50 [ 33.323368] kasan_set_track+0x25/0x30 [ 33.323858] __kasan_slab_alloc+0x59/0x70 [ 33.324383] kmem_cache_alloc+0x16b/0x370 [ 33.324902] vm_area_dup+0x20/0x160 [ 33.325345] __split_vma+0x170/0x950 [ 33.325800] split_vma+0xc6/0x110 [ 33.326239] mprotect_fixup+0x8d2/0xb30 [ 33.326757] do_mprotect_pkey+0x87e/0xd40 [ 33.327270] __x64_sys_mprotect+0x78/0xc0 [ 33.327792] do_syscall_64+0x3f/0x90 [ 33.328260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.328882] [ 33.329099] Freed by task 213: [ 33.329486] kasan_save_stack+0x22/0x50 [ 33.329982] kasan_set_track+0x25/0x30 [ 33.330471] kasan_save_free_info+0x2b/0x50 [ 33.330997] __kasan_slab_free+0x10a/0x190 [ 33.331520] kmem_cache_free+0x10d/0x4d0 [ 33.332033] rcu_core+0x8c8/0x2860 [ 33.332473] __do_softirq+0x1b7/0x7d4 [ 33.332940] [ 33.333153] Last potentially related work creation: [ 33.333729] kasan_save_stack+0x22/0x50 [ 33.334240] __kasan_record_aux_stack+0x8e/0xa0 [ 33.334826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.335463] remove_vma+0x139/0x170 [ 33.335908] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.336463] do_vmi_munmap+0x1f1/0x2b0 [ 33.336942] __vm_munmap+0x138/0x3a0 [ 33.337403] __x64_sys_munmap+0x59/0x80 [ 33.337892] do_syscall_64+0x3f/0x90 [ 33.338365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.338998] [ 33.339213] The buggy address belongs to the object at ffff88800effe2b8 [ 33.339213] which belongs to the cache vm_area_struct of size 168 [ 33.340652] The buggy address is located 88 bytes inside of [ 33.340652] freed 168-byte region [ffff88800effe2b8, ffff88800effe360) [ 33.342048] [ 33.342272] The buggy address belongs to the physical page: [ 33.342937] page:000000001da37864 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeffe [ 33.344011] memcg:ffff88800dad2701 [ 33.344428] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.345061] page_type: 0xffffffff() [ 33.345507] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9500 000000000000000a [ 33.346443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dad2701 [ 33.347341] page dumped because: kasan: bad access detected [ 33.347986] [ 33.348202] Memory state around the buggy address: [ 33.348771] ffff88800effe200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.349614] ffff88800effe280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.350470] >ffff88800effe300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.351315] ^ [ 33.351773] ffff88800effe380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.352626] ffff88800effe400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.353478] ================================================================== [ 33.354524] Disabling lock debugging due to kernel taint [ 35.475330] BUG: Bad rss-counter state mm:000000000e89e32e type:MM_FILEPAGES val:33 [ 35.476714] BUG: Bad rss-counter state mm:000000000e89e32e type:MM_ANONPAGES val:22 [ 36.017096] BUG: Bad rss-counter state mm:000000002891a97e type:MM_FILEPAGES val:33 [ 36.018144] BUG: Bad rss-counter state mm:000000002891a97e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42034' (ECDSA) to the list of known hosts. 2023/06/19 19:21:24 fuzzer started 2023/06/19 19:21:24 dialing manager at localhost:44161 2023/06/19 19:21:24 checking machine... 2023/06/19 19:21:24 checking revisions... [ 36.647059] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:21:25 testing simple program... [ 36.703764] cgroup: Unknown subsys name 'net' [ 36.741522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:21:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180c584 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff888019fd79b0 RSP=ffff888019fd78e8 R8 =0000000000000000 R9 =ffff888019fd7998 R10=0000000000038001 R11=0000000000020d8a R12=ffff888019fd79b8 R13=ffff888019fd79a0 R14=ffff888019fd7999 R15=ffff888019fd7958 RIP=ffffffff8113077a RFL=00000213 [----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 00007fcdea0cf900 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=00007ffe474b0000 CR3=000000000fc20000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000000 RCX=ffffffff8450c68c RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff8460144a RBP=0000000000000000 RSP=ffff888008e27db0 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450b8ad RFL=00000016 [----AP-] 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 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=00007f51d9639600 CR3=000000000fb40000 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=2034323a31323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000