syzkaller login: [ 38.953219] BUG: Bad rss-counter state mm:00000000fb6c7dff type:MM_FILEPAGES val:33 [ 38.953972] BUG: Bad rss-counter state mm:00000000fb6c7dff type:MM_ANONPAGES val:22 [ 38.983493] ================================================================== [ 38.984146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.984831] Read of size 8 at addr ffff88800f6434e0 by task sshd/219 [ 38.985415] [ 38.985571] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.986182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.986869] Call Trace: [ 38.987107] [ 38.987314] dump_stack_lvl+0x91/0xf0 [ 38.987666] print_report+0xcc/0x620 [ 38.988159] ? __virt_addr_valid+0x102/0x340 [ 38.988558] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989002] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989453] kasan_report+0xbe/0xf0 [ 38.989789] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.990242] vma_interval_tree_remove+0xc75/0xec0 [ 38.990664] vma_prepare+0xc54/0x11a0 [ 38.991004] __split_vma+0x5af/0x950 [ 38.991337] ? __pfx___split_vma+0x10/0x10 [ 38.991718] ? find_held_lock+0x2c/0x110 [ 38.992109] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.992505] ? lock_is_held_type+0x9f/0x120 [ 38.992889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.993394] ? mtree_range_walk+0x632/0x900 [ 38.993779] ? mas_walk+0x5c7/0x7c0 [ 38.994113] do_vmi_munmap+0x1f1/0x2b0 [ 38.994454] mmap_region+0x1f9/0x2660 [ 38.994786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.995155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.995664] ? __pfx_lock_acquire+0x10/0x10 [ 38.996046] ? __pfx_mmap_region+0x10/0x10 [ 38.996422] ? security_mmap_addr+0x7d/0xa0 [ 38.996796] ? get_unmapped_area+0x1f5/0x3f0 [ 38.997181] do_mmap+0x854/0xf00 [ 38.997503] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.997852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.998246] ksys_mmap_pgoff+0x3af/0x500 [ 38.998611] do_syscall_64+0x3f/0x90 [ 38.998950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.999416] RIP: 0033:0x7fbf8a232d82 [ 38.999741] 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 [ 39.001254] RSP: 002b:00007ffcc4389278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.001915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf8a232d82 [ 39.002516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf8966c000 [ 39.003109] RBP: 00007fbf8966c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.003717] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ef12f4f70 [ 39.004333] R13: 00007ffcc4389290 R14: 00007ffcc43892c0 R15: 00007ffcc4389620 [ 39.004946] [ 39.005155] [ 39.005330] Allocated by task 212: [ 39.005630] kasan_save_stack+0x22/0x50 [ 39.005993] kasan_set_track+0x25/0x30 [ 39.006355] __kasan_slab_alloc+0x59/0x70 [ 39.006733] kmem_cache_alloc+0x16b/0x370 [ 39.007113] vm_area_dup+0x20/0x160 [ 39.007444] __split_vma+0x170/0x950 [ 39.007777] split_vma+0xc6/0x110 [ 39.008088] mprotect_fixup+0x8d2/0xb30 [ 39.008439] do_mprotect_pkey+0x87e/0xd40 [ 39.008811] __x64_sys_mprotect+0x78/0xc0 [ 39.009185] do_syscall_64+0x3f/0x90 [ 39.009544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010003] [ 39.010162] Freed by task 212: [ 39.010446] kasan_save_stack+0x22/0x50 [ 39.010814] kasan_set_track+0x25/0x30 [ 39.011165] kasan_save_free_info+0x2b/0x50 [ 39.011542] __kasan_slab_free+0x10a/0x190 [ 39.011918] kmem_cache_free+0x10d/0x4d0 [ 39.012279] rcu_core+0x8c8/0x2860 [ 39.012608] __do_softirq+0x1b7/0x7d4 [ 39.012951] [ 39.013105] Last potentially related work creation: [ 39.013551] kasan_save_stack+0x22/0x50 [ 39.013902] __kasan_record_aux_stack+0x8e/0xa0 [ 39.014306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.014760] remove_vma+0x139/0x170 [ 39.015107] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.015681] do_vmi_munmap+0x1f1/0x2b0 [ 39.016040] __vm_munmap+0x138/0x3a0 [ 39.016429] __x64_sys_munmap+0x59/0x80 [ 39.016805] do_syscall_64+0x3f/0x90 [ 39.017174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.017661] [ 39.017822] The buggy address belongs to the object at ffff88800f643488 [ 39.017822] which belongs to the cache vm_area_struct of size 168 [ 39.018910] The buggy address is located 88 bytes inside of [ 39.018910] freed 168-byte region [ffff88800f643488, ffff88800f643530) [ 39.019963] [ 39.020129] The buggy address belongs to the physical page: [ 39.020609] page:00000000ffaa7492 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf643 [ 39.021444] memcg:ffff88801a37dd01 [ 39.021755] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.022231] page_type: 0xffffffff() [ 39.022563] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.023249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a37dd01 [ 39.023922] page dumped because: kasan: bad access detected [ 39.024417] [ 39.024571] Memory state around the buggy address: [ 39.024993] ffff88800f643380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.025636] ffff88800f643400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.026265] >ffff88800f643480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.026880] ^ [ 39.027444] ffff88800f643500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.028062] ffff88800f643580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.028688] ================================================================== [ 39.029510] Disabling lock debugging due to kernel taint [ 40.628782] BUG: Bad rss-counter state mm:00000000e1b1f27a type:MM_FILEPAGES val:33 [ 40.629535] BUG: Bad rss-counter state mm:00000000e1b1f27a type:MM_ANONPAGES val:22 [ 41.017431] BUG: Bad rss-counter state mm:00000000e70b4fb7 type:MM_FILEPAGES val:33 [ 41.018117] BUG: Bad rss-counter state mm:00000000e70b4fb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6398' (ECDSA) to the list of known hosts. 2023/06/21 09:07:58 fuzzer started 2023/06/21 09:07:58 dialing manager at localhost:36067 2023/06/21 09:07:58 checking machine... 2023/06/21 09:07:58 checking revisions... [ 41.538839] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:07:58 testing simple program... [ 41.574346] cgroup: Unknown subsys name 'net' [ 41.616902] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:07:58 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=ffff888008c04000 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=00007ffdbf0faba8 CR3=000000000dab4000 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=2037353a37303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88800da77bd0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11001b4ef7b RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007fc47c66a900 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=00007fe2fdf2b650 CR3=000000000ed8c000 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=0eb7eb3e8eb0b1de00000000000ae988 XMM05=ea422addaec7fcd70000000000132bc8 XMM06=806171799158d9670000000000131648 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000