syzkaller login: [ 120.674695] BUG: Bad rss-counter state mm:00000000a09fd7a2 type:MM_FILEPAGES val:33 [ 120.675992] BUG: Bad rss-counter state mm:00000000a09fd7a2 type:MM_ANONPAGES val:22 [ 120.843080] ================================================================== [ 120.844053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 120.845037] Read of size 8 at addr ffff888019808d08 by task sshd/220 [ 120.845926] [ 120.846162] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 120.847236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 120.848291] Call Trace: [ 120.848625] [ 120.848923] dump_stack_lvl+0x91/0xf0 [ 120.849436] print_report+0xcc/0x620 [ 120.849944] ? __virt_addr_valid+0x102/0x340 [ 120.850525] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.851174] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.851821] kasan_report+0xbe/0xf0 [ 120.852343] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.852997] vma_interval_tree_remove+0xc75/0xec0 [ 120.853639] vma_prepare+0xc54/0x11a0 [ 120.854141] __split_vma+0x5af/0x950 [ 120.854640] ? __pfx___split_vma+0x10/0x10 [ 120.855200] ? find_held_lock+0x2c/0x110 [ 120.855747] do_vmi_align_munmap+0x2ba/0x11f0 [ 120.856360] ? lock_is_held_type+0x9f/0x120 [ 120.856923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 120.857566] ? mtree_range_walk+0x632/0x900 [ 120.858157] ? mas_walk+0x5c7/0x7c0 [ 120.858655] do_vmi_munmap+0x1f1/0x2b0 [ 120.859175] mmap_region+0x1f9/0x2660 [ 120.859688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 120.860242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 120.861032] ? __pfx_lock_acquire+0x10/0x10 [ 120.861612] ? __pfx_mmap_region+0x10/0x10 [ 120.862173] ? security_mmap_addr+0x7d/0xa0 [ 120.862738] ? get_unmapped_area+0x1f5/0x3f0 [ 120.863325] do_mmap+0x854/0xf00 [ 120.863784] vm_mmap_pgoff+0x1a6/0x3a0 [ 120.864316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 120.864921] ksys_mmap_pgoff+0x3af/0x500 [ 120.865477] do_syscall_64+0x3f/0x90 [ 120.866001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.866730] RIP: 0033:0x7f92e4dd3d82 [ 120.867245] 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 [ 120.869527] RSP: 002b:00007ffd069815f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 120.870477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92e4dd3d82 [ 120.871368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92e420d000 [ 120.872268] RBP: 00007f92e420d000 R08: 0000000000000009 R09: 0000000000001000 [ 120.873158] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564c2435d90 [ 120.874064] R13: 00007ffd06981610 R14: 00007ffd06981640 R15: 00007ffd069819a0 [ 120.874976] [ 120.875287] [ 120.875516] Allocated by task 213: [ 120.875989] kasan_save_stack+0x22/0x50 [ 120.876527] kasan_set_track+0x25/0x30 [ 120.877048] __kasan_slab_alloc+0x59/0x70 [ 120.877607] kmem_cache_alloc+0x16b/0x370 [ 120.878150] vm_area_dup+0x20/0x160 [ 120.878625] __split_vma+0x170/0x950 [ 120.879122] split_vma+0xc6/0x110 [ 120.879583] mprotect_fixup+0x8d2/0xb30 [ 120.880122] do_mprotect_pkey+0x87e/0xd40 [ 120.880665] __x64_sys_mprotect+0x78/0xc0 [ 120.881225] do_syscall_64+0x3f/0x90 [ 120.881733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.882412] [ 120.882638] Freed by task 13: [ 120.883040] kasan_save_stack+0x22/0x50 [ 120.883572] kasan_set_track+0x25/0x30 [ 120.884114] kasan_save_free_info+0x2b/0x50 [ 120.884677] __kasan_slab_free+0x10a/0x190 [ 120.885243] kmem_cache_free+0x10d/0x4d0 [ 120.885795] rcu_core+0x8c8/0x2860 [ 120.886302] __do_softirq+0x1b7/0x7d4 [ 120.886820] [ 120.887058] Last potentially related work creation: [ 120.887693] kasan_save_stack+0x22/0x50 [ 120.888233] __kasan_record_aux_stack+0x8e/0xa0 [ 120.888837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 120.889516] remove_vma+0x139/0x170 [ 120.889998] do_vmi_align_munmap+0xd4a/0x11f0 [ 120.890592] do_vmi_munmap+0x1f1/0x2b0 [ 120.891111] __vm_munmap+0x138/0x3a0 [ 120.891607] __x64_sys_munmap+0x59/0x80 [ 120.892150] do_syscall_64+0x3f/0x90 [ 120.892660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.893349] [ 120.893576] The buggy address belongs to the object at ffff888019808cb0 [ 120.893576] which belongs to the cache vm_area_struct of size 168 [ 120.895153] The buggy address is located 88 bytes inside of [ 120.895153] freed 168-byte region [ffff888019808cb0, ffff888019808d58) [ 120.896675] [ 120.896911] The buggy address belongs to the physical page: [ 120.897612] page:000000009eb354cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19808 [ 120.898780] memcg:ffff88800ea65e01 [ 120.899245] flags: 0x100000000000200(slab|node=0|zone=1) [ 120.899951] page_type: 0xffffffff() [ 120.900438] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 120.901423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea65e01 [ 120.902394] page dumped because: kasan: bad access detected [ 120.903101] [ 120.903336] Memory state around the buggy address: [ 120.903965] ffff888019808c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 120.904879] ffff888019808c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 120.905781] >ffff888019808d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 120.906696] ^ [ 120.907173] ffff888019808d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 120.908085] ffff888019808e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 120.908981] ================================================================== [ 120.910496] Disabling lock debugging due to kernel taint [ 122.873074] BUG: Bad rss-counter state mm:00000000ed06a33a type:MM_FILEPAGES val:33 [ 122.874725] BUG: Bad rss-counter state mm:00000000ed06a33a type:MM_ANONPAGES val:22 [ 123.474120] BUG: Bad rss-counter state mm:0000000060bfafe3 type:MM_FILEPAGES val:33 [ 123.475285] BUG: Bad rss-counter state mm:0000000060bfafe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52325' (ECDSA) to the list of known hosts. 2023/06/19 17:29:38 fuzzer started 2023/06/19 17:29:38 dialing manager at localhost:44161 2023/06/19 17:29:38 checking machine... 2023/06/19 17:29:38 checking revisions... [ 124.111059] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:29:38 testing simple program... [ 124.162134] cgroup: Unknown subsys name 'net' [ 124.207780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:28:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff88801796d5b4 RBP=0000000000000000 RSP=ffff88801783f970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800c979d00 RIP=ffffffff814c07e0 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 00007fc031ada900 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=00007ffc5bc93000 CR3=000000000feda000 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=00000000000000000000000000000000 XMM01=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fbbd5cfcbd0 CR3=000000000ef7e000 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=335135a655bb7494bc437f2f95096c7f XMM02=0000000000126060ec2efd57dc4c00df XMM03=000000000012d2d80919ab4c0665a688 XMM04=120e684514646b1f00000000000ae988 XMM05=19e9129bd510f235000000000013cef0 XMM06=118f3ba7ac1f1207000000000013bd58 XMM07=e042d86d42eb936e000000000012d558 XMM08=0919ab4c0665a68800000000001260c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000