syzkaller login: [ 28.782912] BUG: Bad rss-counter state mm:000000000f126d8b type:MM_FILEPAGES val:33 [ 28.784186] BUG: Bad rss-counter state mm:000000000f126d8b type:MM_ANONPAGES val:22 [ 28.965970] ================================================================== [ 28.967096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.968428] Read of size 8 at addr ffff88801a1ff3f8 by task sshd/221 [ 28.969393] [ 28.969663] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.970749] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.971665] Call Trace: [ 28.971967] [ 28.972232] dump_stack_lvl+0x91/0xf0 [ 28.972690] print_report+0xcc/0x620 [ 28.973184] ? __virt_addr_valid+0x102/0x340 [ 28.973779] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974496] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.975217] kasan_report+0xbe/0xf0 [ 28.975774] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.976503] vma_interval_tree_remove+0xc75/0xec0 [ 28.977219] vma_prepare+0xc54/0x11a0 [ 28.977780] __split_vma+0x5af/0x950 [ 28.978334] ? __pfx___split_vma+0x10/0x10 [ 28.978951] ? find_held_lock+0x2c/0x110 [ 28.979553] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.980214] ? lock_is_held_type+0x9f/0x120 [ 28.980850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.981584] ? mtree_range_walk+0x632/0x900 [ 28.982234] ? mas_walk+0x5c7/0x7c0 [ 28.982786] do_vmi_munmap+0x1f1/0x2b0 [ 28.983362] mmap_region+0x1f9/0x2660 [ 28.983923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.984514] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.985351] ? __pfx_lock_acquire+0x10/0x10 [ 28.985967] ? __pfx_mmap_region+0x10/0x10 [ 28.986583] ? security_mmap_addr+0x7d/0xa0 [ 28.987199] ? get_unmapped_area+0x1f5/0x3f0 [ 28.987834] do_mmap+0x854/0xf00 [ 28.988348] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.988926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.989580] ksys_mmap_pgoff+0x3af/0x500 [ 28.990200] do_syscall_64+0x3f/0x90 [ 28.990758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.991520] RIP: 0033:0x7f182f719d82 [ 28.992057] 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 [ 28.994581] RSP: 002b:00007ffcf74a4318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.995639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f182f719d82 [ 28.996633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f182eb53000 [ 28.997654] RBP: 00007f182eb53000 R08: 0000000000000009 R09: 0000000000001000 [ 28.998690] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db30f7fec0 [ 28.999662] R13: 00007ffcf74a4330 R14: 00007ffcf74a4360 R15: 00007ffcf74a46c0 [ 29.000654] [ 29.001139] [ 29.001414] Allocated by task 213: [ 29.001946] kasan_save_stack+0x22/0x50 [ 29.002574] kasan_set_track+0x25/0x30 [ 29.003187] __kasan_slab_alloc+0x59/0x70 [ 29.003831] kmem_cache_alloc+0x16b/0x370 [ 29.004473] vm_area_dup+0x20/0x160 [ 29.005052] __split_vma+0x170/0x950 [ 29.005633] split_vma+0xc6/0x110 [ 29.006179] mprotect_fixup+0x8d2/0xb30 [ 29.006804] do_mprotect_pkey+0x87e/0xd40 [ 29.007450] __x64_sys_mprotect+0x78/0xc0 [ 29.008097] do_syscall_64+0x3f/0x90 [ 29.008681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.009559] [ 29.009826] Freed by task 203: [ 29.010241] kasan_save_stack+0x22/0x50 [ 29.010760] kasan_set_track+0x25/0x30 [ 29.011277] kasan_save_free_info+0x2b/0x50 [ 29.011833] __kasan_slab_free+0x10a/0x190 [ 29.012392] kmem_cache_free+0x10d/0x4d0 [ 29.012930] rcu_core+0x8c8/0x2860 [ 29.013400] __do_softirq+0x1b7/0x7d4 [ 29.013903] [ 29.014129] Last potentially related work creation: [ 29.014733] kasan_save_stack+0x22/0x50 [ 29.015262] __kasan_record_aux_stack+0x8e/0xa0 [ 29.015856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.016542] remove_vma+0x139/0x170 [ 29.017070] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.017674] do_vmi_munmap+0x1f1/0x2b0 [ 29.018181] __vm_munmap+0x138/0x3a0 [ 29.018677] __x64_sys_munmap+0x59/0x80 [ 29.019201] do_syscall_64+0x3f/0x90 [ 29.019697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.020371] [ 29.020597] The buggy address belongs to the object at ffff88801a1ff3a0 [ 29.020597] which belongs to the cache vm_area_struct of size 168 [ 29.022177] The buggy address is located 88 bytes inside of [ 29.022177] freed 168-byte region [ffff88801a1ff3a0, ffff88801a1ff448) [ 29.023654] [ 29.023884] The buggy address belongs to the physical page: [ 29.024583] page:00000000e9b22857 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ff [ 29.025739] memcg:ffff88801811b701 [ 29.026194] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.026873] page_type: 0xffffffff() [ 29.027350] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.028322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801811b701 [ 29.029298] page dumped because: kasan: bad access detected [ 29.029998] [ 29.030227] Memory state around the buggy address: [ 29.030835] ffff88801a1ff280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.031730] ffff88801a1ff300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.032646] >ffff88801a1ff380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.033577] ^ [ 29.034460] ffff88801a1ff400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.035368] ffff88801a1ff480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.036255] ================================================================== [ 29.037423] Disabling lock debugging due to kernel taint [ 31.413879] BUG: Bad rss-counter state mm:0000000065014fd4 type:MM_FILEPAGES val:33 [ 31.415056] BUG: Bad rss-counter state mm:0000000065014fd4 type:MM_ANONPAGES val:22 [ 31.890883] BUG: Bad rss-counter state mm:000000009ce1a61c type:MM_FILEPAGES val:33 [ 31.891922] BUG: Bad rss-counter state mm:000000009ce1a61c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30636' (ECDSA) to the list of known hosts. 2023/06/20 11:04:04 fuzzer started 2023/06/20 11:04:04 dialing manager at localhost:36067 2023/06/20 11:04:04 checking machine... 2023/06/20 11:04:04 checking revisions... [ 32.620710] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:04:04 testing simple program... [ 32.670987] cgroup: Unknown subsys name 'net' [ 32.730210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:04 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=00007ffc7d769688 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=00007f716f69251000005592a6748790 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=0000000080000001 RBX=00007f3176c37f18 RCX=ffffffff813a0add RDX=ffffffffffffffff RSI=00007f3176c37f18 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff888016c3f860 R8 =0000000000000006 R9 =00007f3176c37f18 R10=ffffffffffffffff R11=00000000000b6a61 R12=ffff888016c3f9a0 R13=0000000000000000 R14=ffff88800fde0000 R15=0000000000092cc0 RIP=ffffffff814c0250 RFL=00000283 [--S---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 00007f3176750900 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=00007f3176d080b0 CR3=000000000e5e0000 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=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