syzkaller login: [ 44.415084] BUG: Bad rss-counter state mm:000000009d35d7e5 type:MM_FILEPAGES val:33 [ 44.416098] BUG: Bad rss-counter state mm:000000009d35d7e5 type:MM_ANONPAGES val:22 [ 44.568701] ================================================================== [ 44.569787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.570882] Read of size 8 at addr ffff88800c567228 by task sshd/218 [ 44.571922] [ 44.572169] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.573081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.574079] Call Trace: [ 44.574397] [ 44.574677] dump_stack_lvl+0x91/0xf0 [ 44.575210] print_report+0xcc/0x620 [ 44.575702] ? __virt_addr_valid+0x102/0x340 [ 44.576286] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.576911] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.577559] kasan_report+0xbe/0xf0 [ 44.578055] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.578681] vma_interval_tree_remove+0xc75/0xec0 [ 44.579323] vma_prepare+0xc54/0x11a0 [ 44.579802] __split_vma+0x5af/0x950 [ 44.580306] ? __pfx___split_vma+0x10/0x10 [ 44.580835] ? find_held_lock+0x2c/0x110 [ 44.581380] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.581946] ? lock_is_held_type+0x9f/0x120 [ 44.582494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.583143] ? mtree_range_walk+0x632/0x900 [ 44.583698] ? mas_walk+0x5c7/0x7c0 [ 44.584202] do_vmi_munmap+0x1f1/0x2b0 [ 44.584698] mmap_region+0x1f9/0x2660 [ 44.585206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.585721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.586461] ? __pfx_lock_acquire+0x10/0x10 [ 44.587013] ? __pfx_mmap_region+0x10/0x10 [ 44.587558] ? security_mmap_addr+0x7d/0xa0 [ 44.588089] ? get_unmapped_area+0x1f5/0x3f0 [ 44.588643] do_mmap+0x854/0xf00 [ 44.589081] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.589583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.590146] ksys_mmap_pgoff+0x3af/0x500 [ 44.590649] do_syscall_64+0x3f/0x90 [ 44.591135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.591777] RIP: 0033:0x7f2c2c374d82 [ 44.592231] 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 [ 44.594340] RSP: 002b:00007ffef7a9a658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.595284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c2c374d82 [ 44.596126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c2b7ae000 [ 44.596962] RBP: 00007f2c2b7ae000 R08: 0000000000000009 R09: 0000000000001000 [ 44.597808] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbf2076d90 [ 44.598661] R13: 00007ffef7a9a670 R14: 00007ffef7a9a6a0 R15: 00007ffef7a9aa00 [ 44.599522] [ 44.599815] [ 44.600035] Allocated by task 211: [ 44.600459] kasan_save_stack+0x22/0x50 [ 44.600966] kasan_set_track+0x25/0x30 [ 44.601458] __kasan_slab_alloc+0x59/0x70 [ 44.601981] kmem_cache_alloc+0x16b/0x370 [ 44.602490] vm_area_dup+0x20/0x160 [ 44.602942] __split_vma+0x170/0x950 [ 44.603414] split_vma+0xc6/0x110 [ 44.603860] mprotect_fixup+0x8d2/0xb30 [ 44.604367] do_mprotect_pkey+0x87e/0xd40 [ 44.604891] __x64_sys_mprotect+0x78/0xc0 [ 44.605415] do_syscall_64+0x3f/0x90 [ 44.605887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.606526] [ 44.606739] Freed by task 211: [ 44.607147] kasan_save_stack+0x22/0x50 [ 44.607654] kasan_set_track+0x25/0x30 [ 44.608151] kasan_save_free_info+0x2b/0x50 [ 44.608680] __kasan_slab_free+0x10a/0x190 [ 44.609211] kmem_cache_free+0x10d/0x4d0 [ 44.609718] rcu_core+0x8c8/0x2860 [ 44.610161] __do_softirq+0x1b7/0x7d4 [ 44.610642] [ 44.610856] Last potentially related work creation: [ 44.611446] kasan_save_stack+0x22/0x50 [ 44.611948] __kasan_record_aux_stack+0x8e/0xa0 [ 44.612524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.613162] remove_vma+0x139/0x170 [ 44.613614] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.614170] do_vmi_munmap+0x1f1/0x2b0 [ 44.614655] __vm_munmap+0x138/0x3a0 [ 44.615154] __x64_sys_munmap+0x59/0x80 [ 44.615645] do_syscall_64+0x3f/0x90 [ 44.616113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.616757] [ 44.616973] The buggy address belongs to the object at ffff88800c5671d0 [ 44.616973] which belongs to the cache vm_area_struct of size 168 [ 44.618433] The buggy address is located 88 bytes inside of [ 44.618433] freed 168-byte region [ffff88800c5671d0, ffff88800c567278) [ 44.619851] [ 44.620066] The buggy address belongs to the physical page: [ 44.620730] page:000000000c07b78c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc567 [ 44.621816] memcg:ffff88800ca97601 [ 44.622249] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.622905] page_type: 0xffffffff() [ 44.623365] raw: 0100000000000200 ffff88800879fc80 ffffea00003b57c0 dead000000000006 [ 44.624287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca97601 [ 44.625189] page dumped because: kasan: bad access detected [ 44.625849] [ 44.626062] Memory state around the buggy address: [ 44.626656] ffff88800c567100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.627521] ffff88800c567180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.628378] >ffff88800c567200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.629231] ^ [ 44.629786] ffff88800c567280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 44.630636] ffff88800c567300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 44.631508] ================================================================== [ 44.633161] Disabling lock debugging due to kernel taint [ 46.500617] BUG: Bad rss-counter state mm:000000001cdef3d0 type:MM_FILEPAGES val:33 [ 46.501725] BUG: Bad rss-counter state mm:000000001cdef3d0 type:MM_ANONPAGES val:22 [ 47.039867] BUG: Bad rss-counter state mm:000000009df21e21 type:MM_FILEPAGES val:33 [ 47.041045] BUG: Bad rss-counter state mm:000000009df21e21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48160' (ECDSA) to the list of known hosts. 2023/06/20 05:01:06 fuzzer started 2023/06/20 05:01:06 dialing manager at localhost:44161 2023/06/20 05:01:06 checking machine... 2023/06/20 05:01:06 checking revisions... [ 47.736858] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:01:06 testing simple program... [ 47.782308] cgroup: Unknown subsys name 'net' [ 47.836878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b2962 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015827378 RSP=ffff8880158272b0 R8 =ffffffff863b2966 R9 =ffff888015827360 R10=0000000000038001 R11=000000000008ab99 R12=ffff888015827380 R13=ffff888015827368 R14=ffff888015827f40 R15=ffff888015827320 RIP=ffffffff81131153 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 00007f6cc679c900 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=00007fbcdd148650 CR3=000000000d666000 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=6733a35998f3ffa400000000000ae988 XMM05=0ed8a39c608cddf30000000000134798 XMM06=bdf2e299e47b49d50000000000133218 XMM07=fb795ef6d65770560000000000123790 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800dccedd0 RBX=ffff88800dccedd0 RCX=0000000000000000 RDX=ffff8880196a51c0 RSI=ffffffff81ef7bf2 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff888018217b98 R8 =0000000000000004 R9 =0000000000000059 R10=0000000000000059 R11=0000000000000000 R12=0000000000000010 R13=0000000000000007 R14=0000000000000059 R15=ffff888018217c20 RIP=ffffffff814c07e0 RFL=00000282 [--S----] 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 00007fbcdcb93900 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=00007fbcdd14b0b0 CR3=00000000068bc000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000