syzkaller login: [ 31.135716] BUG: Bad rss-counter state mm:0000000035de3456 type:MM_FILEPAGES val:33 [ 31.137195] BUG: Bad rss-counter state mm:0000000035de3456 type:MM_ANONPAGES val:22 [ 31.279343] ================================================================== [ 31.280246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.281165] Read of size 8 at addr ffff888016548b38 by task sshd/220 [ 31.281935] [ 31.282147] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.283164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284135] Call Trace: [ 31.284458] [ 31.284745] dump_stack_lvl+0x91/0xf0 [ 31.285251] print_report+0xcc/0x620 [ 31.285743] ? __virt_addr_valid+0x102/0x340 [ 31.286298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286905] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287509] kasan_report+0xbe/0xf0 [ 31.287987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288627] vma_interval_tree_remove+0xc75/0xec0 [ 31.289226] vma_prepare+0xc54/0x11a0 [ 31.289723] __split_vma+0x5af/0x950 [ 31.290187] ? __pfx___split_vma+0x10/0x10 [ 31.290708] ? find_held_lock+0x2c/0x110 [ 31.291232] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.291795] ? lock_is_held_type+0x9f/0x120 [ 31.292325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.292924] ? mtree_range_walk+0x632/0x900 [ 31.293470] ? mas_walk+0x5c7/0x7c0 [ 31.293957] do_vmi_munmap+0x1f1/0x2b0 [ 31.294442] mmap_region+0x1f9/0x2660 [ 31.294919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.295424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.296131] ? __pfx_lock_acquire+0x10/0x10 [ 31.296654] ? __pfx_mmap_region+0x10/0x10 [ 31.297181] ? security_mmap_addr+0x7d/0xa0 [ 31.297732] ? get_unmapped_area+0x1f5/0x3f0 [ 31.298283] do_mmap+0x854/0xf00 [ 31.298720] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.299758] ksys_mmap_pgoff+0x3af/0x500 [ 31.300260] do_syscall_64+0x3f/0x90 [ 31.300733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301366] RIP: 0033:0x7f94e16d7d82 [ 31.301824] 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 [ 31.303933] RSP: 002b:00007ffcf9d31fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.304825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94e16d7d82 [ 31.305682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94e0b11000 [ 31.306525] RBP: 00007f94e0b11000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d417feec0 [ 31.308192] R13: 00007ffcf9d31ff0 R14: 00007ffcf9d32020 R15: 00007ffcf9d32380 [ 31.309042] [ 31.309334] [ 31.309547] Allocated by task 213: [ 31.309988] kasan_save_stack+0x22/0x50 [ 31.310496] kasan_set_track+0x25/0x30 [ 31.310984] __kasan_slab_alloc+0x59/0x70 [ 31.311507] kmem_cache_alloc+0x16b/0x370 [ 31.312022] vm_area_dup+0x20/0x160 [ 31.312474] __split_vma+0x170/0x950 [ 31.312932] split_vma+0xc6/0x110 [ 31.313371] mprotect_fixup+0x8d2/0xb30 [ 31.313881] do_mprotect_pkey+0x87e/0xd40 [ 31.314395] __x64_sys_mprotect+0x78/0xc0 [ 31.314911] do_syscall_64+0x3f/0x90 [ 31.315378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316009] [ 31.316221] Freed by task 213: [ 31.316613] kasan_save_stack+0x22/0x50 [ 31.317109] kasan_set_track+0x25/0x30 [ 31.317598] kasan_save_free_info+0x2b/0x50 [ 31.318154] __kasan_slab_free+0x10a/0x190 [ 31.318677] kmem_cache_free+0x10d/0x4d0 [ 31.319177] rcu_core+0x8c8/0x2860 [ 31.319619] __do_softirq+0x1b7/0x7d4 [ 31.320085] [ 31.320300] Last potentially related work creation: [ 31.320876] kasan_save_stack+0x22/0x50 [ 31.321371] __kasan_record_aux_stack+0x8e/0xa0 [ 31.321945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.322573] remove_vma+0x139/0x170 [ 31.323017] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.323589] do_vmi_munmap+0x1f1/0x2b0 [ 31.324095] __vm_munmap+0x138/0x3a0 [ 31.324557] __x64_sys_munmap+0x59/0x80 [ 31.325054] do_syscall_64+0x3f/0x90 [ 31.325522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326171] [ 31.326385] The buggy address belongs to the object at ffff888016548ae0 [ 31.326385] which belongs to the cache vm_area_struct of size 168 [ 31.327831] The buggy address is located 88 bytes inside of [ 31.327831] freed 168-byte region [ffff888016548ae0, ffff888016548b88) [ 31.329211] [ 31.329425] The buggy address belongs to the physical page: [ 31.330087] page:00000000bb13fa26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16548 [ 31.331156] memcg:ffff88800d506401 [ 31.331582] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.332268] page_type: 0xffffffff() [ 31.332722] raw: 0100000000000200 ffff88800879fc80 ffffea00003bcb00 dead000000000003 [ 31.333629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d506401 [ 31.334532] page dumped because: kasan: bad access detected [ 31.335182] [ 31.335394] Memory state around the buggy address: [ 31.335973] ffff888016548a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.336826] ffff888016548a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.337694] >ffff888016548b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.338540] ^ [ 31.339136] ffff888016548b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.339999] ffff888016548c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.340843] ================================================================== [ 31.341756] Disabling lock debugging due to kernel taint [ 33.296289] BUG: Bad rss-counter state mm:000000004e0738d6 type:MM_FILEPAGES val:33 [ 33.297190] BUG: Bad rss-counter state mm:000000004e0738d6 type:MM_ANONPAGES val:22 [ 33.801281] BUG: Bad rss-counter state mm:000000008d6f24db type:MM_FILEPAGES val:33 [ 33.802305] BUG: Bad rss-counter state mm:000000008d6f24db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50962' (ECDSA) to the list of known hosts. 2023/06/19 17:57:21 fuzzer started 2023/06/19 17:57:21 dialing manager at localhost:44161 2023/06/19 17:57:21 checking machine... 2023/06/19 17:57:21 checking revisions... [ 34.537886] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:57:21 testing simple program... [ 34.599031] cgroup: Unknown subsys name 'net' [ 34.637296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:21 Registers: info registers vcpu 0 RAX=000055b7915df010 RBX=0000000000000000 RCX=0000000000000010 RDX=0000000000000005 RSI=000055b791627280 RDI=000000000000000f RBP=000000000000000f RSP=00007ffff30dfa80 R8 =000055b7916242c0 R9 =000000000000000e R10=000055b791614770 R11=0000000000000000 R12=fffffffffffffe28 R13=000000000000000f R14=000055b791629e20 R15=00007ffff30dfaa0 RIP=00007fb3f557720b RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb3f50f9900 00000000 00000000 GS =0000 0000000000000000 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=00007fb3f56b10b0 CR3=000000000ef9c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fcefe25a390 CR3=000000000ee6a000 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=1a898bda9ce9109e5a4b95b030cc2e18 XMM02=000000000011cf30ec2efd57dc4c00df XMM03=00000000001243f06440786a0743d284 XMM04=56039c6330e6a42900000000000ae988 XMM05=19e9129bd510f2350000000000133f90 XMM06=2aec95646abfc19b0000000000132df8 XMM07=e042d86d42eb936e0000000000124670 XMM08=6440786a0743d284000000000011cf90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000