syzkaller login: [ 30.607238] BUG: Bad rss-counter state mm:000000009a024717 type:MM_FILEPAGES val:33 [ 30.608925] BUG: Bad rss-counter state mm:000000009a024717 type:MM_ANONPAGES val:22 [ 30.773449] ================================================================== [ 30.774540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.775475] Read of size 8 at addr ffff888019903df0 by task sshd/221 [ 30.776401] [ 30.776624] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.777488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.778505] Call Trace: [ 30.778827] [ 30.779113] dump_stack_lvl+0x91/0xf0 [ 30.779611] print_report+0xcc/0x620 [ 30.780099] ? __virt_addr_valid+0x102/0x340 [ 30.780656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781918] kasan_report+0xbe/0xf0 [ 30.782399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783018] vma_interval_tree_remove+0xc75/0xec0 [ 30.783623] vma_prepare+0xc54/0x11a0 [ 30.784101] __split_vma+0x5af/0x950 [ 30.784574] ? __pfx___split_vma+0x10/0x10 [ 30.785105] ? find_held_lock+0x2c/0x110 [ 30.785627] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.786206] ? lock_is_held_type+0x9f/0x120 [ 30.786748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.787359] ? mtree_range_walk+0x632/0x900 [ 30.787923] ? mas_walk+0x5c7/0x7c0 [ 30.788403] do_vmi_munmap+0x1f1/0x2b0 [ 30.788896] mmap_region+0x1f9/0x2660 [ 30.789381] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.789923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.790638] ? __pfx_lock_acquire+0x10/0x10 [ 30.791183] ? __pfx_mmap_region+0x10/0x10 [ 30.791722] ? security_mmap_addr+0x7d/0xa0 [ 30.792262] ? get_unmapped_area+0x1f5/0x3f0 [ 30.792808] do_mmap+0x854/0xf00 [ 30.793250] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.793769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.794338] ksys_mmap_pgoff+0x3af/0x500 [ 30.794845] do_syscall_64+0x3f/0x90 [ 30.795337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795985] RIP: 0033:0x7f8c155f6d82 [ 30.796444] 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 [ 30.798565] RSP: 002b:00007ffe8c44b708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.799476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c155f6d82 [ 30.800320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c14a30000 [ 30.801185] RBP: 00007f8c14a30000 R08: 0000000000000009 R09: 0000000000001000 [ 30.802055] R10: 0000000000000812 R11: 0000000000000206 R12: 000056067b079ec0 [ 30.802911] R13: 00007ffe8c44b720 R14: 00007ffe8c44b750 R15: 00007ffe8c44bab0 [ 30.803787] [ 30.804082] [ 30.804302] Allocated by task 214: [ 30.804732] kasan_save_stack+0x22/0x50 [ 30.805241] kasan_set_track+0x25/0x30 [ 30.805752] __kasan_slab_alloc+0x59/0x70 [ 30.806292] kmem_cache_alloc+0x16b/0x370 [ 30.806809] vm_area_dup+0x20/0x160 [ 30.807275] __split_vma+0x170/0x950 [ 30.807742] split_vma+0xc6/0x110 [ 30.808184] mprotect_fixup+0x8d2/0xb30 [ 30.808684] do_mprotect_pkey+0x87e/0xd40 [ 30.809213] __x64_sys_mprotect+0x78/0xc0 [ 30.809744] do_syscall_64+0x3f/0x90 [ 30.810224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810869] [ 30.811086] Freed by task 214: [ 30.811488] kasan_save_stack+0x22/0x50 [ 30.811991] kasan_set_track+0x25/0x30 [ 30.812486] kasan_save_free_info+0x2b/0x50 [ 30.813015] __kasan_slab_free+0x10a/0x190 [ 30.813548] kmem_cache_free+0x10d/0x4d0 [ 30.814079] rcu_core+0x8c8/0x2860 [ 30.814524] __do_softirq+0x1b7/0x7d4 [ 30.815011] [ 30.815230] Last potentially related work creation: [ 30.815813] kasan_save_stack+0x22/0x50 [ 30.816315] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.817616] remove_vma+0x139/0x170 [ 30.818081] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.818641] do_vmi_munmap+0x1f1/0x2b0 [ 30.819128] __vm_munmap+0x138/0x3a0 [ 30.819597] __x64_sys_munmap+0x59/0x80 [ 30.820091] do_syscall_64+0x3f/0x90 [ 30.820574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821220] [ 30.821436] The buggy address belongs to the object at ffff888019903d98 [ 30.821436] which belongs to the cache vm_area_struct of size 168 [ 30.822919] The buggy address is located 88 bytes inside of [ 30.822919] freed 168-byte region [ffff888019903d98, ffff888019903e40) [ 30.824362] [ 30.824580] The buggy address belongs to the physical page: [ 30.825243] page:000000005ab53535 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19903 [ 30.826345] memcg:ffff888009496601 [ 30.826774] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827425] page_type: 0xffffffff() [ 30.827879] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.828807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009496601 [ 30.829729] page dumped because: kasan: bad access detected [ 30.830400] [ 30.830617] Memory state around the buggy address: [ 30.831194] ffff888019903c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.832058] ffff888019903d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.832921] >ffff888019903d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833787] ^ [ 30.834609] ffff888019903e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.835470] ffff888019903e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836317] ================================================================== [ 30.837230] Disabling lock debugging due to kernel taint [ 33.122020] BUG: Bad rss-counter state mm:00000000e2ada7c0 type:MM_FILEPAGES val:33 [ 33.123012] BUG: Bad rss-counter state mm:00000000e2ada7c0 type:MM_ANONPAGES val:22 [ 33.575490] BUG: Bad rss-counter state mm:000000007b7cf590 type:MM_FILEPAGES val:33 [ 33.576529] BUG: Bad rss-counter state mm:000000007b7cf590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14609' (ECDSA) to the list of known hosts. 2023/06/21 03:43:56 fuzzer started 2023/06/21 03:43:56 dialing manager at localhost:36067 2023/06/21 03:43:56 checking machine... 2023/06/21 03:43:56 checking revisions... [ 34.278710] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:43:56 testing simple program... [ 34.324368] cgroup: Unknown subsys name 'net' [ 34.372852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:43:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffff888015f33680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800ff3f9b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007fcd16aaa477 R13=0000000000000000 R14=ffff888015f33680 R15=ffff88800cb2c980 RIP=ffffffff814c086b 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 00007fcd165b7900 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=00007fcd16b6c650 CR3=0000000019a44000 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=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 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=00005638de7c7000 CR3=0000000005482000 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=00007fd3423115100000561c929b2790 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