syzkaller login: [ 38.717932] BUG: Bad rss-counter state mm:00000000ca5736bc type:MM_FILEPAGES val:33 [ 38.718471] BUG: Bad rss-counter state mm:00000000ca5736bc type:MM_ANONPAGES val:22 [ 38.875189] ================================================================== [ 38.876103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.877060] Read of size 8 at addr ffff88800d9b3228 by task sshd/220 [ 38.877830] [ 38.878045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.880085] Call Trace: [ 38.880406] [ 38.880779] dump_stack_lvl+0x91/0xf0 [ 38.881391] print_report+0xcc/0x620 [ 38.881968] ? __virt_addr_valid+0x102/0x340 [ 38.882637] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883371] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884117] kasan_report+0xbe/0xf0 [ 38.884679] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885420] vma_interval_tree_remove+0xc75/0xec0 [ 38.886148] vma_prepare+0xc54/0x11a0 [ 38.886692] __split_vma+0x5af/0x950 [ 38.887169] ? __pfx___split_vma+0x10/0x10 [ 38.887704] ? find_held_lock+0x2c/0x110 [ 38.888233] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.888800] ? lock_is_held_type+0x9f/0x120 [ 38.889349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.889959] ? mtree_range_walk+0x632/0x900 [ 38.890541] ? mas_walk+0x5c7/0x7c0 [ 38.891020] do_vmi_munmap+0x1f1/0x2b0 [ 38.891510] mmap_region+0x1f9/0x2660 [ 38.892000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.892520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.893232] ? __pfx_lock_acquire+0x10/0x10 [ 38.893779] ? __pfx_mmap_region+0x10/0x10 [ 38.894324] ? security_mmap_addr+0x7d/0xa0 [ 38.894868] ? get_unmapped_area+0x1f5/0x3f0 [ 38.895438] do_mmap+0x854/0xf00 [ 38.895898] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.896402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.896977] ksys_mmap_pgoff+0x3af/0x500 [ 38.897496] do_syscall_64+0x3f/0x90 [ 38.897986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898671] RIP: 0033:0x7f2169f3ad82 [ 38.899127] 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 [ 38.901301] RSP: 002b:00007ffe844afa58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.902235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2169f3ad82 [ 38.903130] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2169374000 [ 38.903993] RBP: 00007f2169374000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055662f110d90 [ 38.905723] R13: 00007ffe844afa70 R14: 00007ffe844afaa0 R15: 00007ffe844afe00 [ 38.906601] [ 38.906894] [ 38.907109] Allocated by task 213: [ 38.907550] kasan_save_stack+0x22/0x50 [ 38.908058] kasan_set_track+0x25/0x30 [ 38.908558] __kasan_slab_alloc+0x59/0x70 [ 38.909089] kmem_cache_alloc+0x16b/0x370 [ 38.909604] vm_area_dup+0x20/0x160 [ 38.910056] __split_vma+0x170/0x950 [ 38.910542] split_vma+0xc6/0x110 [ 38.910991] mprotect_fixup+0x8d2/0xb30 [ 38.911499] do_mprotect_pkey+0x87e/0xd40 [ 38.912027] __x64_sys_mprotect+0x78/0xc0 [ 38.912556] do_syscall_64+0x3f/0x90 [ 38.913038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913684] [ 38.913902] Freed by task 204: [ 38.914307] kasan_save_stack+0x22/0x50 [ 38.914813] kasan_set_track+0x25/0x30 [ 38.915316] kasan_save_free_info+0x2b/0x50 [ 38.915866] __kasan_slab_free+0x10a/0x190 [ 38.916403] kmem_cache_free+0x10d/0x4d0 [ 38.916916] rcu_core+0x8c8/0x2860 [ 38.917360] __do_softirq+0x1b7/0x7d4 [ 38.917836] [ 38.918051] Last potentially related work creation: [ 38.918646] kasan_save_stack+0x22/0x50 [ 38.919158] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.920441] remove_vma+0x139/0x170 [ 38.920894] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.921463] do_vmi_munmap+0x1f1/0x2b0 [ 38.921958] __vm_munmap+0x138/0x3a0 [ 38.922441] __x64_sys_munmap+0x59/0x80 [ 38.922948] do_syscall_64+0x3f/0x90 [ 38.923425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924072] [ 38.924284] The buggy address belongs to the object at ffff88800d9b31d0 [ 38.924284] which belongs to the cache vm_area_struct of size 168 [ 38.925790] The buggy address is located 88 bytes inside of [ 38.925790] freed 168-byte region [ffff88800d9b31d0, ffff88800d9b3278) [ 38.927211] [ 38.927434] The buggy address belongs to the physical page: [ 38.928104] page:000000003d51c178 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9b3 [ 38.929200] memcg:ffff88800e74d001 [ 38.929633] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930371] page_type: 0xffffffff() [ 38.930830] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.931762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e74d001 [ 38.932688] page dumped because: kasan: bad access detected [ 38.933356] [ 38.933583] Memory state around the buggy address: [ 38.934175] ffff88800d9b3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.935052] ffff88800d9b3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.935911] >ffff88800d9b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.936797] ^ [ 38.937353] ffff88800d9b3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.938222] ffff88800d9b3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.939110] ================================================================== [ 38.940041] Disabling lock debugging due to kernel taint [ 41.433996] BUG: Bad rss-counter state mm:000000002de25946 type:MM_FILEPAGES val:33 [ 41.435107] BUG: Bad rss-counter state mm:000000002de25946 type:MM_ANONPAGES val:22 [ 42.003532] BUG: Bad rss-counter state mm:00000000ba6b2aab type:MM_FILEPAGES val:33 [ 42.004750] BUG: Bad rss-counter state mm:00000000ba6b2aab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45890' (ECDSA) to the list of known hosts. 2023/06/20 13:12:24 fuzzer started 2023/06/20 13:12:24 dialing manager at localhost:36067 2023/06/20 13:12:24 checking machine... 2023/06/20 13:12:24 checking revisions... [ 42.642727] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:12:24 testing simple program... [ 42.677389] cgroup: Unknown subsys name 'net' [ 42.723872] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:24 Registers: info registers vcpu 0 RAX=00000000935d8aed RBX=000000001b769dbe RCX=ffff8880168679ec RDX=000000000000000e RSI=000000000000000d RDI=0000000031a6fbc2 RBP=ffff88800844f780 RSP=ffff888016867948 R8 =0000000097bce305 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880168679b0 R15=000000000000000e RIP=ffffffff82270457 RFL=00000a86 [-OS--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 00007febd751f900 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=00007febd7ad6618 CR3=00000000167ea000 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=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 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=0000000000000001 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=00007f94f4254970 CR3=000000000d56c000 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=a0530ea8113917bae14583283118dc0b XMM02=2c67c8bc2e329bc3000000000011bfe8 XMM03=fb795ef6d65770560000000000122210 XMM04=3dd595917c260d2f00000000000ae988 XMM05=19e9129bd510f2350000000000131db8 XMM06=96ed3272df3f83f70000000000130f90 XMM07=e042d86d42eb936e00000000001224e8 XMM08=5a8846e21fa29645000000000011c048 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000