syzkaller login: [ 31.140570] BUG: Bad rss-counter state mm:00000000e08031e4 type:MM_FILEPAGES val:33 [ 31.141825] BUG: Bad rss-counter state mm:00000000e08031e4 type:MM_ANONPAGES val:22 [ 31.295112] ================================================================== [ 31.296034] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.296969] Read of size 8 at addr ffff88801659cd08 by task sshd/220 [ 31.297902] [ 31.298129] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.298985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.299985] Call Trace: [ 31.300305] [ 31.300598] dump_stack_lvl+0x91/0xf0 [ 31.301086] print_report+0xcc/0x620 [ 31.301569] ? __virt_addr_valid+0x102/0x340 [ 31.302136] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302749] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303358] kasan_report+0xbe/0xf0 [ 31.303836] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304451] vma_interval_tree_remove+0xc75/0xec0 [ 31.305049] vma_prepare+0xc54/0x11a0 [ 31.305526] __split_vma+0x5af/0x950 [ 31.306008] ? __pfx___split_vma+0x10/0x10 [ 31.306552] ? find_held_lock+0x2c/0x110 [ 31.307080] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.307649] ? lock_is_held_type+0x9f/0x120 [ 31.308185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.308795] ? mtree_range_walk+0x632/0x900 [ 31.309359] ? mas_walk+0x5c7/0x7c0 [ 31.309842] do_vmi_munmap+0x1f1/0x2b0 [ 31.310342] mmap_region+0x1f9/0x2660 [ 31.310828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.311343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.312070] ? __pfx_lock_acquire+0x10/0x10 [ 31.312612] ? __pfx_mmap_region+0x10/0x10 [ 31.313142] ? security_mmap_addr+0x7d/0xa0 [ 31.313673] ? get_unmapped_area+0x1f5/0x3f0 [ 31.314250] do_mmap+0x854/0xf00 [ 31.314694] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.315188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.315759] ksys_mmap_pgoff+0x3af/0x500 [ 31.316274] do_syscall_64+0x3f/0x90 [ 31.316763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317419] RIP: 0033:0x7ff93a8d7d82 [ 31.317879] 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 [ 31.320034] RSP: 002b:00007ffe360acd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.320941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff93a8d7d82 [ 31.321788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff939d11000 [ 31.322644] RBP: 00007ff939d11000 R08: 0000000000000009 R09: 0000000000001000 [ 31.323482] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e46bddff60 [ 31.324318] R13: 00007ffe360acd70 R14: 00007ffe360acda0 R15: 00007ffe360ad100 [ 31.325177] [ 31.325471] [ 31.325687] Allocated by task 213: [ 31.326121] kasan_save_stack+0x22/0x50 [ 31.326620] kasan_set_track+0x25/0x30 [ 31.327109] __kasan_slab_alloc+0x59/0x70 [ 31.327644] kmem_cache_alloc+0x16b/0x370 [ 31.328157] vm_area_dup+0x20/0x160 [ 31.328628] __split_vma+0x170/0x950 [ 31.329096] split_vma+0xc6/0x110 [ 31.329543] mprotect_fixup+0x8d2/0xb30 [ 31.330041] do_mprotect_pkey+0x87e/0xd40 [ 31.330590] __x64_sys_mprotect+0x78/0xc0 [ 31.331109] do_syscall_64+0x3f/0x90 [ 31.331583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332220] [ 31.332433] Freed by task 213: [ 31.332824] kasan_save_stack+0x22/0x50 [ 31.333327] kasan_set_track+0x25/0x30 [ 31.333826] kasan_save_free_info+0x2b/0x50 [ 31.334371] __kasan_slab_free+0x10a/0x190 [ 31.334899] kmem_cache_free+0x10d/0x4d0 [ 31.335404] rcu_core+0x8c8/0x2860 [ 31.335847] __do_softirq+0x1b7/0x7d4 [ 31.336325] [ 31.336543] Last potentially related work creation: [ 31.337121] kasan_save_stack+0x22/0x50 [ 31.337624] __kasan_record_aux_stack+0x8e/0xa0 [ 31.338203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.338856] remove_vma+0x139/0x170 [ 31.339423] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.339977] do_vmi_munmap+0x1f1/0x2b0 [ 31.340461] __vm_munmap+0x138/0x3a0 [ 31.340942] __x64_sys_munmap+0x59/0x80 [ 31.341440] do_syscall_64+0x3f/0x90 [ 31.341928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342589] [ 31.342807] The buggy address belongs to the object at ffff88801659ccb0 [ 31.342807] which belongs to the cache vm_area_struct of size 168 [ 31.344296] The buggy address is located 88 bytes inside of [ 31.344296] freed 168-byte region [ffff88801659ccb0, ffff88801659cd58) [ 31.345719] [ 31.345941] The buggy address belongs to the physical page: [ 31.346617] page:00000000a59078cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1659c [ 31.347705] memcg:ffff888014496201 [ 31.348125] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.348769] page_type: 0xffffffff() [ 31.349218] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.350150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014496201 [ 31.351057] page dumped because: kasan: bad access detected [ 31.351721] [ 31.351939] Memory state around the buggy address: [ 31.352516] ffff88801659cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.353363] ffff88801659cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.354220] >ffff88801659cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.355066] ^ [ 31.355508] ffff88801659cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.356356] ffff88801659ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.357209] ================================================================== [ 31.358147] Disabling lock debugging due to kernel taint [ 33.852877] BUG: Bad rss-counter state mm:000000007b6a07d4 type:MM_FILEPAGES val:33 [ 33.854043] BUG: Bad rss-counter state mm:000000007b6a07d4 type:MM_ANONPAGES val:22 [ 34.268505] BUG: Bad rss-counter state mm:0000000095a89189 type:MM_FILEPAGES val:33 [ 34.269498] BUG: Bad rss-counter state mm:0000000095a89189 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50152' (ECDSA) to the list of known hosts. 2023/06/21 07:36:40 fuzzer started 2023/06/21 07:36:40 dialing manager at localhost:36067 2023/06/21 07:36:40 checking machine... 2023/06/21 07:36:40 checking revisions... [ 34.906456] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:36:40 testing simple program... [ 34.951649] cgroup: Unknown subsys name 'net' [ 34.990629] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888014643680 RSI=ffffffff848ab5a0 RDI=0000000000000002 RBP=0000000000000000 RSP=ffff8880146e7ee0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000010 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0464 RFL=00000293 [--S-A-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 00007f7aeb95c900 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=00007f7aeade2950 CR3=000000000d7c0000 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=009a2eee9d580bb6af42f228e6568302 XMM02=000000000011b240d59e07bde36eea69 XMM03=000000000011b368ec2efd57dc4c00df XMM04=67cd9a5b9317e8fd00000000000ae988 XMM05=5cc2e7cbbb7536c50000000000132d18 XMM06=4fda316b135da52b0000000000131db8 XMM07=fb795ef6d65770560000000000122070 XMM08=2c67c8bc2e329bc3000000000011b368 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000051 RCX=ffffffff83723e30 RDX=ffff8880169051c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000052 RSP=ffff88800f9777b8 R8 =0000000000000005 R9 =0000000000000011 R10=0000000000000051 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d68 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c027c 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 00007f50bbdcf900 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=00007f50bc386618 CR3=000000000cb3c000 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=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