syzkaller login: [ 31.651328] BUG: Bad rss-counter state mm:00000000ccd01250 type:MM_FILEPAGES val:33 [ 31.652532] BUG: Bad rss-counter state mm:00000000ccd01250 type:MM_ANONPAGES val:22 [ 31.828852] ================================================================== [ 31.829780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.830718] Read of size 8 at addr ffff88800a11e3f8 by task sshd/224 [ 31.831593] [ 31.831858] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.832766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.833737] Call Trace: [ 31.834077] [ 31.834366] dump_stack_lvl+0x91/0xf0 [ 31.834866] print_report+0xcc/0x620 [ 31.835344] ? __virt_addr_valid+0x102/0x340 [ 31.835907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.836552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.837162] kasan_report+0xbe/0xf0 [ 31.837645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.838256] vma_interval_tree_remove+0xc75/0xec0 [ 31.838876] vma_prepare+0xc54/0x11a0 [ 31.839362] __split_vma+0x5af/0x950 [ 31.839842] ? __pfx___split_vma+0x10/0x10 [ 31.840395] ? find_held_lock+0x2c/0x110 [ 31.840923] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.841519] ? lock_is_held_type+0x9f/0x120 [ 31.842058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.842720] ? mtree_range_walk+0x632/0x900 [ 31.843344] ? mas_walk+0x5c7/0x7c0 [ 31.843837] do_vmi_munmap+0x1f1/0x2b0 [ 31.844338] mmap_region+0x1f9/0x2660 [ 31.844829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.845342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.846074] ? __pfx_lock_acquire+0x10/0x10 [ 31.846632] ? __pfx_mmap_region+0x10/0x10 [ 31.847168] ? security_mmap_addr+0x7d/0xa0 [ 31.847716] ? get_unmapped_area+0x1f5/0x3f0 [ 31.848281] do_mmap+0x854/0xf00 [ 31.848733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.849224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.849799] ksys_mmap_pgoff+0x3af/0x500 [ 31.850313] do_syscall_64+0x3f/0x90 [ 31.850821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.851487] RIP: 0033:0x7f3f0a535d82 [ 31.851940] 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 [ 31.854105] RSP: 002b:00007ffc5001def8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.855036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f0a535d82 [ 31.855907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f0996f000 [ 31.856776] RBP: 00007f3f0996f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.857625] R10: 0000000000000812 R11: 0000000000000206 R12: 000056041ab52f60 [ 31.858475] R13: 00007ffc5001df10 R14: 00007ffc5001df40 R15: 00007ffc5001e2a0 [ 31.859338] [ 31.859657] [ 31.859871] Allocated by task 215: [ 31.860322] kasan_save_stack+0x22/0x50 [ 31.860841] kasan_set_track+0x25/0x30 [ 31.861337] __kasan_slab_alloc+0x59/0x70 [ 31.861871] kmem_cache_alloc+0x16b/0x370 [ 31.862398] vm_area_dup+0x20/0x160 [ 31.862859] __split_vma+0x170/0x950 [ 31.863331] split_vma+0xc6/0x110 [ 31.863799] mprotect_fixup+0x8d2/0xb30 [ 31.864321] do_mprotect_pkey+0x87e/0xd40 [ 31.864853] __x64_sys_mprotect+0x78/0xc0 [ 31.865383] do_syscall_64+0x3f/0x90 [ 31.865867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.866525] [ 31.866739] Freed by task 215: [ 31.867180] kasan_save_stack+0x22/0x50 [ 31.867833] kasan_set_track+0x25/0x30 [ 31.868509] kasan_save_free_info+0x2b/0x50 [ 31.869205] __kasan_slab_free+0x10a/0x190 [ 31.869911] kmem_cache_free+0x10d/0x4d0 [ 31.870572] rcu_core+0x8c8/0x2860 [ 31.871097] __do_softirq+0x1b7/0x7d4 [ 31.871656] [ 31.871936] Last potentially related work creation: [ 31.872679] kasan_save_stack+0x22/0x50 [ 31.873204] __kasan_record_aux_stack+0x8e/0xa0 [ 31.873788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.874447] remove_vma+0x139/0x170 [ 31.874896] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.875478] do_vmi_munmap+0x1f1/0x2b0 [ 31.875959] __vm_munmap+0x138/0x3a0 [ 31.876473] __x64_sys_munmap+0x59/0x80 [ 31.876969] do_syscall_64+0x3f/0x90 [ 31.877455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878098] [ 31.878314] The buggy address belongs to the object at ffff88800a11e3a0 [ 31.878314] which belongs to the cache vm_area_struct of size 168 [ 31.879830] The buggy address is located 88 bytes inside of [ 31.879830] freed 168-byte region [ffff88800a11e3a0, ffff88800a11e448) [ 31.881272] [ 31.881506] The buggy address belongs to the physical page: [ 31.882157] page:00000000ca0eab1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa11e [ 31.883259] memcg:ffff888008ebb801 [ 31.883700] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.884411] page_type: 0xffffffff() [ 31.884856] raw: 0100000000000200 ffff8880087a0c80 ffffea0000284600 dead000000000007 [ 31.885861] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ebb801 [ 31.886803] page dumped because: kasan: bad access detected [ 31.887484] [ 31.887699] Memory state around the buggy address: [ 31.888305] ffff88800a11e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.889191] ffff88800a11e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.890060] >ffff88800a11e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.890934] ^ [ 31.891813] ffff88800a11e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.892695] ffff88800a11e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.893562] ================================================================== [ 31.894572] Disabling lock debugging due to kernel taint [ 34.355776] BUG: Bad rss-counter state mm:000000002075cbda type:MM_FILEPAGES val:33 [ 34.356760] BUG: Bad rss-counter state mm:000000002075cbda type:MM_ANONPAGES val:22 [ 34.852669] BUG: Bad rss-counter state mm:00000000a66ae56c type:MM_FILEPAGES val:33 [ 34.854178] BUG: Bad rss-counter state mm:00000000a66ae56c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47540' (ECDSA) to the list of known hosts. 2023/06/21 07:12:33 fuzzer started 2023/06/21 07:12:34 dialing manager at localhost:36067 2023/06/21 07:12:34 checking machine... 2023/06/21 07:12:34 checking revisions... [ 35.572527] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:12:34 testing simple program... [ 35.619249] cgroup: Unknown subsys name 'net' [ 35.655862] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:33 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=00007fb42eb89330 CR3=000000000d758000 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=35023d58c1ad73ab4d46911b66706a6c XMM02=000000000011b2d0eff9b2d0a8fce9cb XMM03=000000000011b3a02c67c8bc2e329bc3 XMM04=52e1cd08e396714b00000000000ae988 XMM05=59d5b690e0af863b0000000000132348 XMM06=00c3ffa147b8d85700000000001321d0 XMM07=e042d86d42eb936e0000000000122770 XMM08=574362d2d6835888000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801c90f9d8 RCX=ffffffff86139701 RDX=1ffff11003921f46 RSI=0000000000000000 RDI=ffffffff8180ca5a RBP=ffff88801c90fa30 RSP=ffff88801c90f9c0 R8 =ffffffff86139748 R9 =ffff88801c90fa18 R10=0000000000038001 R11=0000000000020f03 R12=ffff88801c90faa0 R13=0000000000000000 R14=ffff888019033680 R15=ffff8880161d6ec0 RIP=ffffffff811303b2 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 00007fc54932a900 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=00007fc5498e1618 CR3=0000000008c72000 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=563412feff00545000000000000080fe 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