syzkaller login: [ 38.659487] BUG: Bad rss-counter state mm:00000000fddab03a type:MM_FILEPAGES val:33 [ 38.660253] BUG: Bad rss-counter state mm:00000000fddab03a type:MM_ANONPAGES val:22 [ 38.793749] ================================================================== [ 38.794299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.794832] Read of size 8 at addr ffff88800d59d140 by task sshd/224 [ 38.795243] [ 38.795359] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.795834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.796359] Call Trace: [ 38.796565] [ 38.796721] dump_stack_lvl+0x91/0xf0 [ 38.796974] print_report+0xcc/0x620 [ 38.797227] ? __virt_addr_valid+0x102/0x340 [ 38.797508] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.797911] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.798434] kasan_report+0xbe/0xf0 [ 38.799565] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.799922] vma_interval_tree_remove+0xc75/0xec0 [ 38.800333] vma_prepare+0xc54/0x11a0 [ 38.800670] __split_vma+0x5af/0x950 [ 38.800998] ? __pfx___split_vma+0x10/0x10 [ 38.801380] ? find_held_lock+0x2c/0x110 [ 38.801739] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.802111] ? lock_is_held_type+0x9f/0x120 [ 38.802465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.802869] ? mtree_range_walk+0x632/0x900 [ 38.803250] ? mas_walk+0x5c7/0x7c0 [ 38.803572] do_vmi_munmap+0x1f1/0x2b0 [ 38.803918] mmap_region+0x1f9/0x2660 [ 38.804257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.804612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.805109] ? __pfx_lock_acquire+0x10/0x10 [ 38.805458] ? __pfx_mmap_region+0x10/0x10 [ 38.805834] ? security_mmap_addr+0x7d/0xa0 [ 38.806210] ? get_unmapped_area+0x1f5/0x3f0 [ 38.806579] do_mmap+0x854/0xf00 [ 38.806879] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.807216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.807599] ksys_mmap_pgoff+0x3af/0x500 [ 38.807940] do_syscall_64+0x3f/0x90 [ 38.808269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.808718] RIP: 0033:0x7f1d7cac7d82 [ 38.809037] 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 [ 38.814455] RSP: 002b:00007ffd86d2de68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.815038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d7cac7d82 [ 38.815706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d7bf01000 [ 38.816353] RBP: 00007f1d7bf01000 R08: 0000000000000009 R09: 0000000000001000 [ 38.816950] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e07ef7ec0 [ 38.817494] R13: 00007ffd86d2de80 R14: 00007ffd86d2deb0 R15: 00007ffd86d2e210 [ 38.818087] [ 38.818296] [ 38.818466] Allocated by task 217: [ 38.818767] kasan_save_stack+0x22/0x50 [ 38.819109] kasan_set_track+0x25/0x30 [ 38.819421] __kasan_slab_alloc+0x59/0x70 [ 38.819730] kmem_cache_alloc+0x16b/0x370 [ 38.820065] vm_area_dup+0x20/0x160 [ 38.820332] __split_vma+0x170/0x950 [ 38.820603] split_vma+0xc6/0x110 [ 38.820885] mprotect_fixup+0x8d2/0xb30 [ 38.821219] do_mprotect_pkey+0x87e/0xd40 [ 38.821521] __x64_sys_mprotect+0x78/0xc0 [ 38.821833] do_syscall_64+0x3f/0x90 [ 38.822109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.822484] [ 38.822613] Freed by task 217: [ 38.822848] kasan_save_stack+0x22/0x50 [ 38.823167] kasan_set_track+0x25/0x30 [ 38.823517] kasan_save_free_info+0x2b/0x50 [ 38.823865] __kasan_slab_free+0x10a/0x190 [ 38.824199] kmem_cache_free+0x10d/0x4d0 [ 38.824522] rcu_core+0x8c8/0x2860 [ 38.824807] __do_softirq+0x1b7/0x7d4 [ 38.825140] [ 38.825278] Last potentially related work creation: [ 38.825673] kasan_save_stack+0x22/0x50 [ 38.826002] __kasan_record_aux_stack+0x8e/0xa0 [ 38.826370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.826732] remove_vma+0x139/0x170 [ 38.826995] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.827351] do_vmi_munmap+0x1f1/0x2b0 [ 38.827632] __vm_munmap+0x138/0x3a0 [ 38.827908] __x64_sys_munmap+0x59/0x80 [ 38.828248] do_syscall_64+0x3f/0x90 [ 38.828546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828920] [ 38.829090] The buggy address belongs to the object at ffff88800d59d0e8 [ 38.829090] which belongs to the cache vm_area_struct of size 168 [ 38.830289] The buggy address is located 88 bytes inside of [ 38.830289] freed 168-byte region [ffff88800d59d0e8, ffff88800d59d190) [ 38.831424] [ 38.831576] The buggy address belongs to the physical page: [ 38.832112] page:000000001073cbff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd59d [ 38.832921] memcg:ffff88800df55101 [ 38.833250] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.834756] page_type: 0xffffffff() [ 38.835124] raw: 0100000000000200 ffff8880087a0c80 ffffea000037a800 dead000000000003 [ 38.835776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df55101 [ 38.836473] page dumped because: kasan: bad access detected [ 38.837279] [ 38.837427] Memory state around the buggy address: [ 38.837830] ffff88800d59d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.839425] ffff88800d59d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.840544] >ffff88800d59d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.841207] ^ [ 38.841821] ffff88800d59d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.842488] ffff88800d59d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.844525] ================================================================== [ 38.846020] Disabling lock debugging due to kernel taint [ 40.694789] BUG: Bad rss-counter state mm:000000008a3e22d3 type:MM_FILEPAGES val:33 [ 40.695548] BUG: Bad rss-counter state mm:000000008a3e22d3 type:MM_ANONPAGES val:22 [ 41.106024] BUG: Bad rss-counter state mm:00000000a72b98ac type:MM_FILEPAGES val:33 [ 41.107571] BUG: Bad rss-counter state mm:00000000a72b98ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49526' (ECDSA) to the list of known hosts. 2023/06/21 00:04:44 fuzzer started 2023/06/21 00:04:44 dialing manager at localhost:36067 2023/06/21 00:04:44 checking machine... 2023/06/21 00:04:44 checking revisions... [ 41.884641] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:04:45 testing simple program... [ 41.928878] cgroup: Unknown subsys name 'net' [ 41.988709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:04:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fcd8 RCX=ffffffff86138eb0 RDX=1ffff110011b3f30 RSI=0000000000000000 RDI=ffff888008d9f980 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138eb4 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fcd8 R15=ffff888008d9f978 RIP=ffffffff81131c83 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 =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=00007f9a06c1c650 CR3=0000000016d46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f89ab14d480 CR3=00000000096b8000 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=8fca92840329acbd6749c78283e3cc7f XMM02=000000000011bec0eff9b2d0a8fce9cb XMM03=000000000011bf902c67c8bc2e329bc3 XMM04=0e96efd089f5700500000000000ae988 XMM05=e0eb64d6042979850000000000132570 XMM06=ae9b264101391a5b0000000000131bf8 XMM07=e042d86d42eb936e0000000000122430 XMM08=8dbd210e34aa9369000000000011bf90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000