syzkaller login: [ 32.404992] BUG: Bad rss-counter state mm:00000000b24dd102 type:MM_FILEPAGES val:33 [ 32.406252] BUG: Bad rss-counter state mm:00000000b24dd102 type:MM_ANONPAGES val:22 [ 32.554807] ================================================================== [ 32.555712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.556649] Read of size 8 at addr ffff88800e9c45c8 by task sshd/220 [ 32.557603] [ 32.557832] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.558728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.559714] Call Trace: [ 32.560034] [ 32.560319] dump_stack_lvl+0x91/0xf0 [ 32.560823] print_report+0xcc/0x620 [ 32.561307] ? __virt_addr_valid+0x102/0x340 [ 32.561856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.562482] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.563098] kasan_report+0xbe/0xf0 [ 32.563572] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.564193] vma_interval_tree_remove+0xc75/0xec0 [ 32.564799] vma_prepare+0xc54/0x11a0 [ 32.565276] __split_vma+0x5af/0x950 [ 32.565748] ? __pfx___split_vma+0x10/0x10 [ 32.566291] ? find_held_lock+0x2c/0x110 [ 32.566810] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.567376] ? lock_is_held_type+0x9f/0x120 [ 32.567913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.568520] ? mtree_range_walk+0x632/0x900 [ 32.569068] ? mas_walk+0x5c7/0x7c0 [ 32.569543] do_vmi_munmap+0x1f1/0x2b0 [ 32.570054] mmap_region+0x1f9/0x2660 [ 32.570539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.571049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.571804] ? __pfx_lock_acquire+0x10/0x10 [ 32.572387] ? __pfx_mmap_region+0x10/0x10 [ 32.572960] ? security_mmap_addr+0x7d/0xa0 [ 32.573543] ? get_unmapped_area+0x1f5/0x3f0 [ 32.574157] do_mmap+0x854/0xf00 [ 32.574624] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.575162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.575773] ksys_mmap_pgoff+0x3af/0x500 [ 32.576317] do_syscall_64+0x3f/0x90 [ 32.576833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.577539] RIP: 0033:0x7f91d39d6d82 [ 32.578044] 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 [ 32.580383] RSP: 002b:00007ffe1f7d8bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.581368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91d39d6d82 [ 32.582313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91d2e10000 [ 32.583220] RBP: 00007f91d2e10000 R08: 0000000000000009 R09: 0000000000001000 [ 32.584125] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c634ccec0 [ 32.585046] R13: 00007ffe1f7d8bf0 R14: 00007ffe1f7d8c20 R15: 00007ffe1f7d8f80 [ 32.585992] [ 32.586310] [ 32.586540] Allocated by task 213: [ 32.587000] kasan_save_stack+0x22/0x50 [ 32.587541] kasan_set_track+0x25/0x30 [ 32.588080] __kasan_slab_alloc+0x59/0x70 [ 32.588646] kmem_cache_alloc+0x16b/0x370 [ 32.589206] vm_area_dup+0x20/0x160 [ 32.589695] __split_vma+0x170/0x950 [ 32.590218] split_vma+0xc6/0x110 [ 32.590702] mprotect_fixup+0x8d2/0xb30 [ 32.591250] do_mprotect_pkey+0x87e/0xd40 [ 32.591814] __x64_sys_mprotect+0x78/0xc0 [ 32.592380] do_syscall_64+0x3f/0x90 [ 32.592888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.593577] [ 32.593807] Freed by task 213: [ 32.594248] kasan_save_stack+0x22/0x50 [ 32.594792] kasan_set_track+0x25/0x30 [ 32.595324] kasan_save_free_info+0x2b/0x50 [ 32.595899] __kasan_slab_free+0x10a/0x190 [ 32.596473] kmem_cache_free+0x10d/0x4d0 [ 32.597031] rcu_core+0x8c8/0x2860 [ 32.597518] __do_softirq+0x1b7/0x7d4 [ 32.598081] [ 32.598335] Last potentially related work creation: [ 32.598978] kasan_save_stack+0x22/0x50 [ 32.599525] __kasan_record_aux_stack+0x8e/0xa0 [ 32.600150] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.600851] remove_vma+0x139/0x170 [ 32.601338] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.601942] do_vmi_munmap+0x1f1/0x2b0 [ 32.602485] __vm_munmap+0x138/0x3a0 [ 32.602992] __x64_sys_munmap+0x59/0x80 [ 32.603527] do_syscall_64+0x3f/0x90 [ 32.604037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.604743] [ 32.604977] The buggy address belongs to the object at ffff88800e9c4570 [ 32.604977] which belongs to the cache vm_area_struct of size 168 [ 32.606595] The buggy address is located 88 bytes inside of [ 32.606595] freed 168-byte region [ffff88800e9c4570, ffff88800e9c4618) [ 32.608081] [ 32.608311] The buggy address belongs to the physical page: [ 32.609007] page:000000001ee4045c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e9c4910 pfn:0xe9c4 [ 32.610330] memcg:ffff88800d401001 [ 32.610790] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.611481] page_type: 0xffffffff() [ 32.611959] raw: 0100000000000200 ffff88800879fc80 ffffea0000401b90 ffffea00005c0c10 [ 32.612947] raw: ffff88800e9c4910 000000000011000a 00000001ffffffff ffff88800d401001 [ 32.613919] page dumped because: kasan: bad access detected [ 32.614632] [ 32.614858] Memory state around the buggy address: [ 32.615478] ffff88800e9c4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.616395] ffff88800e9c4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.617301] >ffff88800e9c4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.618232] ^ [ 32.618939] ffff88800e9c4600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.619851] ffff88800e9c4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.620756] ================================================================== [ 32.621731] Disabling lock debugging due to kernel taint [ 34.768266] BUG: Bad rss-counter state mm:0000000046a4fb44 type:MM_FILEPAGES val:33 [ 34.769227] BUG: Bad rss-counter state mm:0000000046a4fb44 type:MM_ANONPAGES val:22 [ 35.235770] BUG: Bad rss-counter state mm:000000009e261366 type:MM_FILEPAGES val:33 [ 35.236964] BUG: Bad rss-counter state mm:000000009e261366 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44307' (ECDSA) to the list of known hosts. 2023/06/19 14:58:10 fuzzer started 2023/06/19 14:58:10 dialing manager at localhost:44161 2023/06/19 14:58:10 checking machine... 2023/06/19 14:58:10 checking revisions... [ 35.932077] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:58:10 testing simple program... [ 35.977288] cgroup: Unknown subsys name 'net' [ 36.019084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:58:09 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff1100203cf91 RSP=ffff8880101e7c80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=0000000000000287 R13=ffffea000058e700 R14=ffffffff818d9dc6 R15=ffff88800da05c80 RIP=ffffffff812e004a RFL=00000046 [---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 00007fcd2fa20900 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=00007fcd2ee2f100 CR3=000000000f4c4000 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=00000000000000000000000000000000 XMM02=207265737520726f66206465736f6c63 XMM03=00746f6f72207265737520726f662064 XMM04=08540e850c11974500000000000ae988 XMM05=2a97f1ba9a4be9540000000000135328 XMM06=19e9129bd510f23500000000001341c0 XMM07=fb795ef6d65770560000000000124658 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800ebdfd50 RSI=ffff88800ebdfd20 RDI=ffff88800ebdfa50 RBP=ffff88800ebd8000 RSP=ffff88800ebdfa10 R8 =0000000000000001 R9 =ffff88800ebdfa80 R10=0000000000038001 R11=00000000000229c7 R12=ffff88800ebdfaa0 R13=ffff88800ebdfa88 R14=ffff88800ebdfd20 R15=ffff88800ebdfa40 RIP=ffffffff81130930 RFL=00000282 [--S----] 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 00007f1a09eae900 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=00007fff56d30000 CR3=000000000e898000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000