syzkaller login: [ 31.241822] BUG: Bad rss-counter state mm:00000000e16dbe48 type:MM_FILEPAGES val:33 [ 31.242481] BUG: Bad rss-counter state mm:00000000e16dbe48 type:MM_ANONPAGES val:22 [ 31.282584] ================================================================== [ 31.284310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.285502] Read of size 8 at addr ffff8880101f8d08 by task sshd/220 [ 31.286321] [ 31.286633] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.287531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.288557] Call Trace: [ 31.288887] [ 31.289188] dump_stack_lvl+0x91/0xf0 [ 31.289694] print_report+0xcc/0x620 [ 31.290193] ? __virt_addr_valid+0x102/0x340 [ 31.290762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291416] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292108] kasan_report+0xbe/0xf0 [ 31.292595] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293235] vma_interval_tree_remove+0xc75/0xec0 [ 31.293879] vma_prepare+0xc54/0x11a0 [ 31.294383] __split_vma+0x5af/0x950 [ 31.294896] ? __pfx___split_vma+0x10/0x10 [ 31.295457] ? find_held_lock+0x2c/0x110 [ 31.296025] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296608] ? lock_is_held_type+0x9f/0x120 [ 31.297168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.297807] ? mtree_range_walk+0x632/0x900 [ 31.298399] ? mas_walk+0x5c7/0x7c0 [ 31.298916] do_vmi_munmap+0x1f1/0x2b0 [ 31.299436] mmap_region+0x1f9/0x2660 [ 31.299941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.300471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.301208] ? __pfx_lock_acquire+0x10/0x10 [ 31.301753] ? __pfx_mmap_region+0x10/0x10 [ 31.302300] ? security_mmap_addr+0x7d/0xa0 [ 31.302845] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303412] do_mmap+0x854/0xf00 [ 31.303863] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.304386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304967] ksys_mmap_pgoff+0x3af/0x500 [ 31.305493] do_syscall_64+0x3f/0x90 [ 31.305987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306654] RIP: 0033:0x7f33b9904d82 [ 31.307160] 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 [ 31.309425] RSP: 002b:00007ffc347ed418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.310399] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33b9904d82 [ 31.311312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33b8d3e000 [ 31.312270] RBP: 00007f33b8d3e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.313299] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bddf584ec0 [ 31.314328] R13: 00007ffc347ed430 R14: 00007ffc347ed460 R15: 00007ffc347ed7c0 [ 31.315367] [ 31.315720] [ 31.315991] Allocated by task 213: [ 31.316513] kasan_save_stack+0x22/0x50 [ 31.317124] kasan_set_track+0x25/0x30 [ 31.317725] __kasan_slab_alloc+0x59/0x70 [ 31.318381] kmem_cache_alloc+0x16b/0x370 [ 31.319016] vm_area_dup+0x20/0x160 [ 31.319487] __split_vma+0x170/0x950 [ 31.319987] split_vma+0xc6/0x110 [ 31.320444] mprotect_fixup+0x8d2/0xb30 [ 31.320962] do_mprotect_pkey+0x87e/0xd40 [ 31.321501] __x64_sys_mprotect+0x78/0xc0 [ 31.322086] do_syscall_64+0x3f/0x90 [ 31.322656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323381] [ 31.323601] Freed by task 13: [ 31.324027] kasan_save_stack+0x22/0x50 [ 31.324549] kasan_set_track+0x25/0x30 [ 31.325101] kasan_save_free_info+0x2b/0x50 [ 31.325831] __kasan_slab_free+0x10a/0x190 [ 31.326474] kmem_cache_free+0x10d/0x4d0 [ 31.327052] rcu_core+0x8c8/0x2860 [ 31.327508] __do_softirq+0x1b7/0x7d4 [ 31.328019] [ 31.328242] Last potentially related work creation: [ 31.328848] kasan_save_stack+0x22/0x50 [ 31.329373] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330770] remove_vma+0x139/0x170 [ 31.331341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.332037] do_vmi_munmap+0x1f1/0x2b0 [ 31.332543] __vm_munmap+0x138/0x3a0 [ 31.333065] __x64_sys_munmap+0x59/0x80 [ 31.333665] do_syscall_64+0x3f/0x90 [ 31.334267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335053] [ 31.335275] The buggy address belongs to the object at ffff8880101f8cb0 [ 31.335275] which belongs to the cache vm_area_struct of size 168 [ 31.336812] The buggy address is located 88 bytes inside of [ 31.336812] freed 168-byte region [ffff8880101f8cb0, ffff8880101f8d58) [ 31.338519] [ 31.338777] The buggy address belongs to the physical page: [ 31.339579] page:00000000034020dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101f8 [ 31.340912] memcg:ffff88800c7e7f01 [ 31.341427] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.342212] page_type: 0xffffffff() [ 31.342758] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.343874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7e7f01 [ 31.344998] page dumped because: kasan: bad access detected [ 31.345798] [ 31.346054] Memory state around the buggy address: [ 31.346758] ffff8880101f8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.347800] ffff8880101f8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.348846] >ffff8880101f8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.349879] ^ [ 31.350422] ffff8880101f8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351407] ffff8880101f8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.352370] ================================================================== [ 31.353433] Disabling lock debugging due to kernel taint [ 33.255334] BUG: Bad rss-counter state mm:00000000e8e55fc5 type:MM_FILEPAGES val:33 [ 33.256231] BUG: Bad rss-counter state mm:00000000e8e55fc5 type:MM_ANONPAGES val:22 [ 33.654615] BUG: Bad rss-counter state mm:00000000bbc29c77 type:MM_FILEPAGES val:33 [ 33.655453] BUG: Bad rss-counter state mm:00000000bbc29c77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26030' (ECDSA) to the list of known hosts. 2023/06/19 14:17:56 fuzzer started 2023/06/19 14:17:56 dialing manager at localhost:44161 2023/06/19 14:17:56 checking machine... 2023/06/19 14:17:56 checking revisions... [ 34.309676] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:17:57 testing simple program... [ 34.342910] cgroup: Unknown subsys name 'net' [ 34.389195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:17:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=ffff88800c44d1c0 RSI=ffffffff8186cb15 RDI=ffff8880087b6780 RBP=0000000000000002 RSP=ffff88801851fd18 R8 =0000000000000006 R9 =0000000000000200 R10=7fffffffffffffff R11=00000000000b6996 R12=7fffffffffffffff R13=ffff88800e6fde00 R14=0000000000000000 R15=ffff888008f92000 RIP=ffffffff8186cb1c 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 00007f2bb8a2c900 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=00007f2bb8fe40b0 CR3=0000000008da4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000010a3b291 RCX=ffff88806c5d9488 RDX=000000000000000f RSI=0000000000000003 RDI=00000000b6dc2563 RBP=ffff88800e5efe20 RSP=ffff888014747530 R8 =00000000d58eb600 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888014747598 R15=000000000000000f RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007fb0f649d900 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=00007ffce03e8328 CR3=000000000ef1a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a7d0a218685ffc6800000000000ae988 XMM05=1319e678c5640f8a0000000000133ee0 XMM06=94aac670ef06ff650000000000133e48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000