syzkaller login: [ 30.708836] BUG: Bad rss-counter state mm:00000000ce06b24c type:MM_FILEPAGES val:33 [ 30.710280] BUG: Bad rss-counter state mm:00000000ce06b24c type:MM_ANONPAGES val:22 [ 30.854569] ================================================================== [ 30.855475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856442] Read of size 8 at addr ffff8880182a8b38 by task sshd/221 [ 30.857293] [ 30.857530] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859421] Call Trace: [ 30.859760] [ 30.860051] dump_stack_lvl+0x91/0xf0 [ 30.860537] print_report+0xcc/0x620 [ 30.861020] ? __virt_addr_valid+0x102/0x340 [ 30.861577] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862811] kasan_report+0xbe/0xf0 [ 30.863292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863924] vma_interval_tree_remove+0xc75/0xec0 [ 30.864529] vma_prepare+0xc54/0x11a0 [ 30.865006] __split_vma+0x5af/0x950 [ 30.865478] ? __pfx___split_vma+0x10/0x10 [ 30.866007] ? find_held_lock+0x2c/0x110 [ 30.866531] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867100] ? lock_is_held_type+0x9f/0x120 [ 30.867639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868262] ? mtree_range_walk+0x632/0x900 [ 30.868826] ? mas_walk+0x5c7/0x7c0 [ 30.869313] do_vmi_munmap+0x1f1/0x2b0 [ 30.869809] mmap_region+0x1f9/0x2660 [ 30.870284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.870793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871512] ? __pfx_lock_acquire+0x10/0x10 [ 30.872062] ? __pfx_mmap_region+0x10/0x10 [ 30.872589] ? security_mmap_addr+0x7d/0xa0 [ 30.873119] ? get_unmapped_area+0x1f5/0x3f0 [ 30.873679] do_mmap+0x854/0xf00 [ 30.874117] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.874613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875186] ksys_mmap_pgoff+0x3af/0x500 [ 30.875690] do_syscall_64+0x3f/0x90 [ 30.876180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876835] RIP: 0033:0x7f9d0c080d82 [ 30.877290] 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 [ 30.879413] RSP: 002b:00007ffdc1756ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.880326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d0c080d82 [ 30.881176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d0b4ba000 [ 30.882027] RBP: 00007f9d0b4ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.882867] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e424fd5d90 [ 30.883707] R13: 00007ffdc1756b00 R14: 00007ffdc1756b30 R15: 00007ffdc1756e90 [ 30.884588] [ 30.884880] [ 30.885108] Allocated by task 214: [ 30.885544] kasan_save_stack+0x22/0x50 [ 30.886051] kasan_set_track+0x25/0x30 [ 30.886548] __kasan_slab_alloc+0x59/0x70 [ 30.887073] kmem_cache_alloc+0x16b/0x370 [ 30.887593] vm_area_dup+0x20/0x160 [ 30.888064] __split_vma+0x170/0x950 [ 30.888539] split_vma+0xc6/0x110 [ 30.888982] mprotect_fixup+0x8d2/0xb30 [ 30.889491] do_mprotect_pkey+0x87e/0xd40 [ 30.890009] __x64_sys_mprotect+0x78/0xc0 [ 30.890532] do_syscall_64+0x3f/0x90 [ 30.891013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891655] [ 30.891882] Freed by task 214: [ 30.892275] kasan_save_stack+0x22/0x50 [ 30.892785] kasan_set_track+0x25/0x30 [ 30.893279] kasan_save_free_info+0x2b/0x50 [ 30.893813] __kasan_slab_free+0x10a/0x190 [ 30.894348] kmem_cache_free+0x10d/0x4d0 [ 30.894857] rcu_core+0x8c8/0x2860 [ 30.895301] __do_softirq+0x1b7/0x7d4 [ 30.895799] [ 30.896015] Last potentially related work creation: [ 30.896596] kasan_save_stack+0x22/0x50 [ 30.897102] __kasan_record_aux_stack+0x8e/0xa0 [ 30.897673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.898323] remove_vma+0x139/0x170 [ 30.898825] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.899412] do_vmi_munmap+0x1f1/0x2b0 [ 30.899923] __vm_munmap+0x138/0x3a0 [ 30.900415] __x64_sys_munmap+0x59/0x80 [ 30.900923] do_syscall_64+0x3f/0x90 [ 30.901407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902061] [ 30.902283] The buggy address belongs to the object at ffff8880182a8ae0 [ 30.902283] which belongs to the cache vm_area_struct of size 168 [ 30.903783] The buggy address is located 88 bytes inside of [ 30.903783] freed 168-byte region [ffff8880182a8ae0, ffff8880182a8b88) [ 30.905204] [ 30.905427] The buggy address belongs to the physical page: [ 30.906102] page:0000000008ecaa24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182a8 [ 30.907229] memcg:ffff888010250a01 [ 30.907661] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.908326] page_type: 0xffffffff() [ 30.908776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.909694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010250a01 [ 30.910601] page dumped because: kasan: bad access detected [ 30.911268] [ 30.911491] Memory state around the buggy address: [ 30.912091] ffff8880182a8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.912942] ffff8880182a8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.913797] >ffff8880182a8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.914656] ^ [ 30.915263] ffff8880182a8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.916141] ffff8880182a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.916989] ================================================================== [ 30.917958] Disabling lock debugging due to kernel taint [ 32.731926] BUG: Bad rss-counter state mm:00000000a49c3377 type:MM_FILEPAGES val:33 [ 32.732956] BUG: Bad rss-counter state mm:00000000a49c3377 type:MM_ANONPAGES val:22 [ 33.177808] BUG: Bad rss-counter state mm:000000004c42eeb0 type:MM_FILEPAGES val:33 [ 33.178863] BUG: Bad rss-counter state mm:000000004c42eeb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43366' (ECDSA) to the list of known hosts. 2023/06/21 02:14:17 fuzzer started 2023/06/21 02:14:17 dialing manager at localhost:36067 2023/06/21 02:14:17 checking machine... 2023/06/21 02:14:17 checking revisions... [ 33.886650] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:14:17 testing simple program... [ 33.934607] cgroup: Unknown subsys name 'net' [ 33.985735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028bce6f RSI=ffffffff83c1d5a0 RDI=ffff8880145e73e8 RBP=ffff8880145e73b8 RSP=ffff8880145e7310 R8 =0000000000000001 R9 =ffff8880145e7360 R10=0000000000038001 R11=000000000008affe R12=ffff8880145e73e8 R13=0000000000000000 R14=ffff88800fe73680 R15=0000000000000200 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007f6d9d76a900 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=00007fb939d7a650 CR3=000000000d4b8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=06976474a48380e700000000000ae988 XMM05=14dd5242e8c863d20000000000132ae0 XMM06=c291bd5c70af25b900000000001318d0 XMM07=fb795ef6d65770560000000000121ba8 XMM08=4f5453444600273d67736d000d0a0920 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=ffff888008c04400 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=00007fffbd09e338 CR3=000000000dd78000 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=2036313a34313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a34313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000