syzkaller login: [ 45.208690] BUG: Bad rss-counter state mm:0000000007b746df type:MM_FILEPAGES val:33 [ 45.209916] BUG: Bad rss-counter state mm:0000000007b746df type:MM_ANONPAGES val:22 [ 45.306002] ================================================================== [ 45.306923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.307853] Read of size 8 at addr ffff88800e42c3f8 by task sshd/220 [ 45.308611] [ 45.308871] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.310024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.311011] Call Trace: [ 45.311339] [ 45.311622] dump_stack_lvl+0x91/0xf0 [ 45.312125] print_report+0xcc/0x620 [ 45.312604] ? __virt_addr_valid+0x102/0x340 [ 45.313156] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.313797] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.314438] kasan_report+0xbe/0xf0 [ 45.314931] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.315545] vma_interval_tree_remove+0xc75/0xec0 [ 45.316170] vma_prepare+0xc54/0x11a0 [ 45.316665] __split_vma+0x5af/0x950 [ 45.317165] ? __pfx___split_vma+0x10/0x10 [ 45.317733] ? find_held_lock+0x2c/0x110 [ 45.318304] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.318902] ? lock_is_held_type+0x9f/0x120 [ 45.319459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.320096] ? mtree_range_walk+0x632/0x900 [ 45.320661] ? mas_walk+0x5c7/0x7c0 [ 45.321167] do_vmi_munmap+0x1f1/0x2b0 [ 45.321692] mmap_region+0x1f9/0x2660 [ 45.322221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.322751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.323511] ? __pfx_lock_acquire+0x10/0x10 [ 45.324082] ? __pfx_mmap_region+0x10/0x10 [ 45.324630] ? security_mmap_addr+0x7d/0xa0 [ 45.325194] ? get_unmapped_area+0x1f5/0x3f0 [ 45.325772] do_mmap+0x854/0xf00 [ 45.326253] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.326767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.327359] ksys_mmap_pgoff+0x3af/0x500 [ 45.327911] do_syscall_64+0x3f/0x90 [ 45.328405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.329087] RIP: 0033:0x7f07ef2a5d82 [ 45.329554] 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 [ 45.331803] RSP: 002b:00007fff98e7f648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.332747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07ef2a5d82 [ 45.333686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07ee6df000 [ 45.334594] RBP: 00007f07ee6df000 R08: 0000000000000009 R09: 0000000000001000 [ 45.335483] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562384d6cd90 [ 45.336378] R13: 00007fff98e7f660 R14: 00007fff98e7f690 R15: 00007fff98e7f9f0 [ 45.337285] [ 45.337588] [ 45.337830] Allocated by task 213: [ 45.338305] kasan_save_stack+0x22/0x50 [ 45.338836] kasan_set_track+0x25/0x30 [ 45.339357] __kasan_slab_alloc+0x59/0x70 [ 45.339915] kmem_cache_alloc+0x16b/0x370 [ 45.340447] vm_area_dup+0x20/0x160 [ 45.340928] __split_vma+0x170/0x950 [ 45.341410] split_vma+0xc6/0x110 [ 45.341895] mprotect_fixup+0x8d2/0xb30 [ 45.342418] do_mprotect_pkey+0x87e/0xd40 [ 45.342974] __x64_sys_mprotect+0x78/0xc0 [ 45.343516] do_syscall_64+0x3f/0x90 [ 45.344019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.344688] [ 45.344922] Freed by task 213: [ 45.345329] kasan_save_stack+0x22/0x50 [ 45.345877] kasan_set_track+0x25/0x30 [ 45.346407] kasan_save_free_info+0x2b/0x50 [ 45.346971] __kasan_slab_free+0x10a/0x190 [ 45.347524] kmem_cache_free+0x10d/0x4d0 [ 45.348071] rcu_core+0x8c8/0x2860 [ 45.348527] __do_softirq+0x1b7/0x7d4 [ 45.349040] [ 45.349259] Last potentially related work creation: [ 45.349913] kasan_save_stack+0x22/0x50 [ 45.350589] __kasan_record_aux_stack+0x8e/0xa0 [ 45.351202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.351883] remove_vma+0x139/0x170 [ 45.352355] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.352948] do_vmi_munmap+0x1f1/0x2b0 [ 45.353450] __vm_munmap+0x138/0x3a0 [ 45.353991] __x64_sys_munmap+0x59/0x80 [ 45.354514] do_syscall_64+0x3f/0x90 [ 45.355023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.355697] [ 45.355935] The buggy address belongs to the object at ffff88800e42c3a0 [ 45.355935] which belongs to the cache vm_area_struct of size 168 [ 45.357444] The buggy address is located 88 bytes inside of [ 45.357444] freed 168-byte region [ffff88800e42c3a0, ffff88800e42c448) [ 45.358915] [ 45.359136] The buggy address belongs to the physical page: [ 45.359788] page:0000000018071b7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe42c [ 45.360900] memcg:ffff888009429601 [ 45.361335] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.362036] page_type: 0xffffffff() [ 45.362494] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.363427] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009429601 [ 45.364335] page dumped because: kasan: bad access detected [ 45.365005] [ 45.365224] Memory state around the buggy address: [ 45.365843] ffff88800e42c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 45.366765] ffff88800e42c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 45.367678] >ffff88800e42c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.368592] ^ [ 45.369493] ffff88800e42c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.370444] ffff88800e42c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.371357] ================================================================== [ 45.372636] Disabling lock debugging due to kernel taint [ 47.257147] BUG: Bad rss-counter state mm:00000000e9c973b5 type:MM_FILEPAGES val:33 [ 47.258152] BUG: Bad rss-counter state mm:00000000e9c973b5 type:MM_ANONPAGES val:22 [ 47.819744] BUG: Bad rss-counter state mm:000000008b44ca69 type:MM_FILEPAGES val:33 [ 47.820903] BUG: Bad rss-counter state mm:000000008b44ca69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12581' (ECDSA) to the list of known hosts. 2023/06/20 06:56:18 fuzzer started 2023/06/20 06:56:18 dialing manager at localhost:44161 2023/06/20 06:56:18 checking machine... 2023/06/20 06:56:18 checking revisions... [ 48.449990] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:56:18 testing simple program... [ 48.509069] cgroup: Unknown subsys name 'net' [ 48.589272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:56:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd58be9478 CR3=0000000005482000 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=00007ff5d22f35100000564aa74f2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf971 RBX=ffffffff85dfcb88 RCX=ffffffff8180cd08 RDX=0000000000000000 RSI=ffffffff86137736 RDI=ffffffff85dfcb70 RBP=ffffffff85dfcb70 RSP=ffff88806cf099b8 R8 =ffffffff86137736 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020de7 R12=ffffffff85dfcba4 R13=ffffffff85dfcb70 R14=ffffffff85dfcb70 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 00007f0813d43900 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=00007f08142fa618 CR3=000000000c688000 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