syzkaller login: [ 30.733656] BUG: Bad rss-counter state mm:00000000fd55ff2d type:MM_FILEPAGES val:33 [ 30.734844] BUG: Bad rss-counter state mm:00000000fd55ff2d type:MM_ANONPAGES val:22 [ 30.775233] ================================================================== [ 30.776331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.777480] Read of size 8 at addr ffff88800edcf3f8 by task sshd/219 [ 30.778445] [ 30.778677] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.779743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.780890] Call Trace: [ 30.781282] [ 30.781644] dump_stack_lvl+0x91/0xf0 [ 30.782198] print_report+0xcc/0x620 [ 30.782753] ? __virt_addr_valid+0x102/0x340 [ 30.783372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784741] kasan_report+0xbe/0xf0 [ 30.785395] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786055] vma_interval_tree_remove+0xc75/0xec0 [ 30.786691] vma_prepare+0xc54/0x11a0 [ 30.787198] __split_vma+0x5af/0x950 [ 30.787699] ? __pfx___split_vma+0x10/0x10 [ 30.788275] ? find_held_lock+0x2c/0x110 [ 30.788841] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.789486] ? lock_is_held_type+0x9f/0x120 [ 30.790070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.790732] ? mtree_range_walk+0x632/0x900 [ 30.791334] ? mas_walk+0x5c7/0x7c0 [ 30.791854] do_vmi_munmap+0x1f1/0x2b0 [ 30.792392] mmap_region+0x1f9/0x2660 [ 30.792914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.793479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.794260] ? __pfx_lock_acquire+0x10/0x10 [ 30.794838] ? __pfx_mmap_region+0x10/0x10 [ 30.795411] ? security_mmap_addr+0x7d/0xa0 [ 30.795989] ? get_unmapped_area+0x1f5/0x3f0 [ 30.796604] do_mmap+0x854/0xf00 [ 30.797079] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.797634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.798243] ksys_mmap_pgoff+0x3af/0x500 [ 30.798797] do_syscall_64+0x3f/0x90 [ 30.799326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800043] RIP: 0033:0x7f792a620d82 [ 30.800546] 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 [ 30.802888] RSP: 002b:00007ffe0ac35b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.803871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f792a620d82 [ 30.804796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7929a5a000 [ 30.805730] RBP: 00007f7929a5a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.806652] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d0d8b9ec0 [ 30.807579] R13: 00007ffe0ac35bb0 R14: 00007ffe0ac35be0 R15: 00007ffe0ac35f40 [ 30.808527] [ 30.808844] [ 30.809081] Allocated by task 212: [ 30.809571] kasan_save_stack+0x22/0x50 [ 30.810124] kasan_set_track+0x25/0x30 [ 30.810669] __kasan_slab_alloc+0x59/0x70 [ 30.811237] kmem_cache_alloc+0x16b/0x370 [ 30.811796] vm_area_dup+0x20/0x160 [ 30.812290] __split_vma+0x170/0x950 [ 30.812796] split_vma+0xc6/0x110 [ 30.813277] mprotect_fixup+0x8d2/0xb30 [ 30.813846] do_mprotect_pkey+0x87e/0xd40 [ 30.814420] __x64_sys_mprotect+0x78/0xc0 [ 30.814991] do_syscall_64+0x3f/0x90 [ 30.815514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816225] [ 30.816462] Freed by task 212: [ 30.816892] kasan_save_stack+0x22/0x50 [ 30.817464] kasan_set_track+0x25/0x30 [ 30.818002] kasan_save_free_info+0x2b/0x50 [ 30.818592] __kasan_slab_free+0x10a/0x190 [ 30.819175] kmem_cache_free+0x10d/0x4d0 [ 30.819730] rcu_core+0x8c8/0x2860 [ 30.820214] __do_softirq+0x1b7/0x7d4 [ 30.820828] [ 30.821060] Last potentially related work creation: [ 30.821714] kasan_save_stack+0x22/0x50 [ 30.822259] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823594] remove_vma+0x139/0x170 [ 30.824089] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824702] do_vmi_munmap+0x1f1/0x2b0 [ 30.825241] __vm_munmap+0x138/0x3a0 [ 30.825754] __x64_sys_munmap+0x59/0x80 [ 30.826305] do_syscall_64+0x3f/0x90 [ 30.826823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827532] [ 30.827773] The buggy address belongs to the object at ffff88800edcf3a0 [ 30.827773] which belongs to the cache vm_area_struct of size 168 [ 30.829399] The buggy address is located 88 bytes inside of [ 30.829399] freed 168-byte region [ffff88800edcf3a0, ffff88800edcf448) [ 30.830930] [ 30.831167] The buggy address belongs to the physical page: [ 30.831881] page:00000000a4be921e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedcf [ 30.833052] memcg:ffff88800cfa6201 [ 30.833522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.834282] page_type: 0xffffffff() [ 30.834772] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.835776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfa6201 [ 30.836765] page dumped because: kasan: bad access detected [ 30.837497] [ 30.837733] Memory state around the buggy address: [ 30.838372] ffff88800edcf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.839304] ffff88800edcf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.840238] >ffff88800edcf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.841164] ^ [ 30.842100] ffff88800edcf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.843031] ffff88800edcf480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.843969] ================================================================== [ 30.845122] Disabling lock debugging due to kernel taint [ 32.941977] BUG: Bad rss-counter state mm:000000003a544c1c type:MM_FILEPAGES val:33 [ 32.943265] BUG: Bad rss-counter state mm:000000003a544c1c type:MM_ANONPAGES val:22 [ 33.341563] BUG: Bad rss-counter state mm:000000003e7180e6 type:MM_FILEPAGES val:33 [ 33.342553] BUG: Bad rss-counter state mm:000000003e7180e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54461' (ECDSA) to the list of known hosts. 2023/06/21 00:23:02 fuzzer started 2023/06/21 00:23:02 dialing manager at localhost:36067 2023/06/21 00:23:02 checking machine... 2023/06/21 00:23:02 checking revisions... [ 34.068909] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:23:02 testing simple program... [ 34.119241] cgroup: Unknown subsys name 'net' [ 34.176282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd68cfcb98 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=00007fe745ea1510000055adb8785790 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=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015b9b680 RSI=ffffffff81716940 RDI=ffff8880181cfe30 RBP=00007f98a57e950c RSP=ffff8880181cfde0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d2103a0 R13=00007f98a57e950c R14=0000000000000040 R15=ffff888015a92e40 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f98a572c900 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=00007f98a57e950c CR3=000000001a394000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000