syzkaller login: [ 48.420862] BUG: Bad rss-counter state mm:000000000e41a84b type:MM_FILEPAGES val:33 [ 48.422297] BUG: Bad rss-counter state mm:000000000e41a84b type:MM_ANONPAGES val:22 [ 48.548795] ================================================================== [ 48.549424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.550039] Read of size 8 at addr ffff8880160955c8 by task sshd/220 [ 48.550532] [ 48.550675] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.551227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.551864] Call Trace: [ 48.552328] [ 48.552520] dump_stack_lvl+0x91/0xf0 [ 48.552847] print_report+0xcc/0x620 [ 48.553171] ? __virt_addr_valid+0x102/0x340 [ 48.553545] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.553980] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.554402] kasan_report+0xbe/0xf0 [ 48.554725] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.555141] vma_interval_tree_remove+0xc75/0xec0 [ 48.555544] vma_prepare+0xc54/0x11a0 [ 48.555856] __split_vma+0x5af/0x950 [ 48.556166] ? __pfx___split_vma+0x10/0x10 [ 48.556512] ? find_held_lock+0x2c/0x110 [ 48.556856] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.557233] ? lock_is_held_type+0x9f/0x120 [ 48.557598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.558151] ? mtree_range_walk+0x632/0x900 [ 48.558596] ? mas_walk+0x5c7/0x7c0 [ 48.558911] do_vmi_munmap+0x1f1/0x2b0 [ 48.559242] mmap_region+0x1f9/0x2660 [ 48.559566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.559907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.560385] ? __pfx_lock_acquire+0x10/0x10 [ 48.560745] ? __pfx_mmap_region+0x10/0x10 [ 48.561103] ? security_mmap_addr+0x7d/0xa0 [ 48.561462] ? get_unmapped_area+0x1f5/0x3f0 [ 48.561859] do_mmap+0x854/0xf00 [ 48.562152] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.562480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.562854] ksys_mmap_pgoff+0x3af/0x500 [ 48.563195] do_syscall_64+0x3f/0x90 [ 48.563525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.563959] RIP: 0033:0x7fec4a864d82 [ 48.564267] 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 [ 48.565662] RSP: 002b:00007ffc383cd188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.566284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec4a864d82 [ 48.566852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec49c9e000 [ 48.567436] RBP: 00007fec49c9e000 R08: 0000000000000009 R09: 0000000000001000 [ 48.568007] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564417494ec0 [ 48.568568] R13: 00007ffc383cd1a0 R14: 00007ffc383cd1d0 R15: 00007ffc383cd530 [ 48.569133] [ 48.569326] [ 48.569470] Allocated by task 213: [ 48.569762] kasan_save_stack+0x22/0x50 [ 48.570094] kasan_set_track+0x25/0x30 [ 48.570413] __kasan_slab_alloc+0x59/0x70 [ 48.570767] kmem_cache_alloc+0x16b/0x370 [ 48.571113] vm_area_dup+0x20/0x160 [ 48.571419] __split_vma+0x170/0x950 [ 48.571738] split_vma+0xc6/0x110 [ 48.572036] mprotect_fixup+0x8d2/0xb30 [ 48.572381] do_mprotect_pkey+0x87e/0xd40 [ 48.572739] __x64_sys_mprotect+0x78/0xc0 [ 48.573085] do_syscall_64+0x3f/0x90 [ 48.573401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.573852] [ 48.573996] Freed by task 213: [ 48.574253] kasan_save_stack+0x22/0x50 [ 48.574584] kasan_set_track+0x25/0x30 [ 48.574914] kasan_save_free_info+0x2b/0x50 [ 48.575266] __kasan_slab_free+0x10a/0x190 [ 48.575620] kmem_cache_free+0x10d/0x4d0 [ 48.575957] rcu_core+0x8c8/0x2860 [ 48.576252] __do_softirq+0x1b7/0x7d4 [ 48.576560] [ 48.576704] Last potentially related work creation: [ 48.577090] kasan_save_stack+0x22/0x50 [ 48.577421] __kasan_record_aux_stack+0x8e/0xa0 [ 48.577808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.578228] remove_vma+0x139/0x170 [ 48.578522] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.578896] do_vmi_munmap+0x1f1/0x2b0 [ 48.579220] __vm_munmap+0x138/0x3a0 [ 48.579534] __x64_sys_munmap+0x59/0x80 [ 48.579874] do_syscall_64+0x3f/0x90 [ 48.580201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.580635] [ 48.580781] The buggy address belongs to the object at ffff888016095570 [ 48.580781] which belongs to the cache vm_area_struct of size 168 [ 48.581796] The buggy address is located 88 bytes inside of [ 48.581796] freed 168-byte region [ffff888016095570, ffff888016095618) [ 48.582708] [ 48.582855] The buggy address belongs to the physical page: [ 48.583292] page:000000000c22e7eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16095 [ 48.584004] memcg:ffff88800f738a01 [ 48.584293] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.584722] page_type: 0xffffffff() [ 48.585026] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.585622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f738a01 [ 48.586277] page dumped because: kasan: bad access detected [ 48.586709] [ 48.586851] Memory state around the buggy address: [ 48.587228] ffff888016095480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.587805] ffff888016095500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 48.588421] >ffff888016095580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.588973] ^ [ 48.589405] ffff888016095600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 48.589995] ffff888016095680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.590580] ================================================================== [ 48.591215] Disabling lock debugging due to kernel taint [ 50.520639] BUG: Bad rss-counter state mm:000000008258d726 type:MM_FILEPAGES val:33 [ 50.521312] BUG: Bad rss-counter state mm:000000008258d726 type:MM_ANONPAGES val:22 [ 50.866077] BUG: Bad rss-counter state mm:00000000bddd28da type:MM_FILEPAGES val:33 [ 50.867054] BUG: Bad rss-counter state mm:00000000bddd28da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26414' (ECDSA) to the list of known hosts. 2023/06/20 09:37:03 fuzzer started 2023/06/20 09:37:04 dialing manager at localhost:44161 2023/06/20 09:37:04 checking machine... 2023/06/20 09:37:04 checking revisions... [ 51.419181] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:37:04 testing simple program... [ 51.454213] cgroup: Unknown subsys name 'net' [ 51.487351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007fc99d920100 RCX=ffffffff813a0ac9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88800f8a7418 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ed93680 R15=ffff88800d642000 RIP=ffffffff814c01d0 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 00007fc99d42d900 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=00007fc99d9e4618 CR3=0000000010282000 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=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=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=00007ff3d88a7650 CR3=000000000d8ec000 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=781cc234f7e815a75f4df22348114957 XMM02=000000000011cb98ec2efd57dc4c00df XMM03=00000000001240d8b257bb9541a92720 XMM04=cbf9cfb4b2f6952400000000000ae988 XMM05=19e9129bd510f2350000000000133c70 XMM06=519d1c1eced166130000000000132ad8 XMM07=e042d86d42eb936e0000000000124358 XMM08=b257bb9541a92720000000000011cbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000