syzkaller login: [ 30.843265] BUG: Bad rss-counter state mm:000000003723c62a type:MM_FILEPAGES val:33 [ 30.844167] BUG: Bad rss-counter state mm:000000003723c62a type:MM_ANONPAGES val:22 [ 30.964823] ================================================================== [ 30.965324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.965826] Read of size 8 at addr ffff888019ea7880 by task sshd/223 [ 30.966242] [ 30.966359] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.966816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.967337] Call Trace: [ 30.967508] [ 30.967661] dump_stack_lvl+0x91/0xf0 [ 30.967929] print_report+0xcc/0x620 [ 30.968191] ? __virt_addr_valid+0x102/0x340 [ 30.968483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968812] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969142] kasan_report+0xbe/0xf0 [ 30.969395] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969723] vma_interval_tree_remove+0xc75/0xec0 [ 30.970176] vma_prepare+0xc54/0x11a0 [ 30.970436] __split_vma+0x5af/0x950 [ 30.970689] ? __pfx___split_vma+0x10/0x10 [ 30.970977] ? find_held_lock+0x2c/0x110 [ 30.971257] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.971558] ? lock_is_held_type+0x9f/0x120 [ 30.971848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.972192] ? mtree_range_walk+0x632/0x900 [ 30.972492] ? mas_walk+0x5c7/0x7c0 [ 30.972746] do_vmi_munmap+0x1f1/0x2b0 [ 30.973010] mmap_region+0x1f9/0x2660 [ 30.973267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.973543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.973928] ? __pfx_lock_acquire+0x10/0x10 [ 30.974220] ? __pfx_mmap_region+0x10/0x10 [ 30.974506] ? security_mmap_addr+0x7d/0xa0 [ 30.974790] ? get_unmapped_area+0x1f5/0x3f0 [ 30.975083] do_mmap+0x854/0xf00 [ 30.975316] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.975577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.975879] ksys_mmap_pgoff+0x3af/0x500 [ 30.976153] do_syscall_64+0x3f/0x90 [ 30.976412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976759] RIP: 0033:0x7f3a4a8c2d82 [ 30.977003] 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 [ 30.978149] RSP: 002b:00007fffe8607c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.978631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a4a8c2d82 [ 30.979087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a49cfc000 [ 30.979537] RBP: 00007f3a49cfc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.980000] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fab365ec0 [ 30.980456] R13: 00007fffe8607c60 R14: 00007fffe8607c90 R15: 00007fffe8607ff0 [ 30.980921] [ 30.981078] [ 30.981195] Allocated by task 214: [ 30.981428] kasan_save_stack+0x22/0x50 [ 30.981709] kasan_set_track+0x25/0x30 [ 30.981975] __kasan_slab_alloc+0x59/0x70 [ 30.982271] kmem_cache_alloc+0x16b/0x370 [ 30.982552] vm_area_dup+0x20/0x160 [ 30.982800] __split_vma+0x170/0x950 [ 30.983053] split_vma+0xc6/0x110 [ 30.983287] mprotect_fixup+0x8d2/0xb30 [ 30.983559] do_mprotect_pkey+0x87e/0xd40 [ 30.983844] __x64_sys_mprotect+0x78/0xc0 [ 30.984122] do_syscall_64+0x3f/0x90 [ 30.984384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.984735] [ 30.984856] Freed by task 214: [ 30.985072] kasan_save_stack+0x22/0x50 [ 30.985352] kasan_set_track+0x25/0x30 [ 30.985626] kasan_save_free_info+0x2b/0x50 [ 30.985926] __kasan_slab_free+0x10a/0x190 [ 30.986220] kmem_cache_free+0x10d/0x4d0 [ 30.986495] rcu_core+0x8c8/0x2860 [ 30.986737] __do_softirq+0x1b7/0x7d4 [ 30.987002] [ 30.987119] Last potentially related work creation: [ 30.987436] kasan_save_stack+0x22/0x50 [ 30.987707] __kasan_record_aux_stack+0x8e/0xa0 [ 30.988019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.988366] remove_vma+0x139/0x170 [ 30.988609] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.988923] do_vmi_munmap+0x1f1/0x2b0 [ 30.989190] __vm_munmap+0x138/0x3a0 [ 30.989447] __x64_sys_munmap+0x59/0x80 [ 30.989722] do_syscall_64+0x3f/0x90 [ 30.989984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990354] [ 30.990471] The buggy address belongs to the object at ffff888019ea7828 [ 30.990471] which belongs to the cache vm_area_struct of size 168 [ 30.991260] The buggy address is located 88 bytes inside of [ 30.991260] freed 168-byte region [ffff888019ea7828, ffff888019ea78d0) [ 30.992027] [ 30.992144] The buggy address belongs to the physical page: [ 30.992508] page:00000000f4ec921f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ea7 [ 30.993105] memcg:ffff888016e64f01 [ 30.993336] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.993685] page_type: 0xffffffff() [ 30.993930] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.994433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e64f01 [ 30.994928] page dumped because: kasan: bad access detected [ 30.995284] [ 30.995398] Memory state around the buggy address: [ 30.995713] ffff888019ea7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.996179] ffff888019ea7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.996648] >ffff888019ea7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.997105] ^ [ 30.997334] ffff888019ea7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.997807] ffff888019ea7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.998275] ================================================================== [ 30.998817] Disabling lock debugging due to kernel taint [ 33.280562] BUG: Bad rss-counter state mm:0000000010cd41b0 type:MM_FILEPAGES val:33 [ 33.281762] BUG: Bad rss-counter state mm:0000000010cd41b0 type:MM_ANONPAGES val:22 [ 33.775368] BUG: Bad rss-counter state mm:0000000051f73e7d type:MM_FILEPAGES val:33 [ 33.776653] BUG: Bad rss-counter state mm:0000000051f73e7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45875' (ECDSA) to the list of known hosts. 2023/06/20 15:07:35 fuzzer started 2023/06/20 15:07:35 dialing manager at localhost:36067 2023/06/20 15:07:35 checking machine... 2023/06/20 15:07:35 checking revisions... [ 34.434427] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:07:36 testing simple program... [ 34.486084] cgroup: Unknown subsys name 'net' [ 34.545861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:35 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff888019d5c410 RIP=ffffffff8180f09a RFL=00000286 [--S--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 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=00007ffcffa86b28 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=00007fb6e290d5100000556917534790 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=0000000000010b8d RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000010b9e RSI=0000000000003ad7 RDI=ffffffff860d82bc RBP=ffff888014757a98 RSP=ffff8880147579d0 R8 =ffffffff860d8256 R9 =ffff888014757a80 R10=0000000000038001 R11=0000000000010b8d R12=ffff888014757aa0 R13=ffff888014757a88 R14=ffff888014757a81 R15=ffff888014757a40 RIP=ffffffff81130868 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 00007fe79e04f900 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=00007fe79e606618 CR3=000000000ea40000 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