syzkaller login: [ 35.546154] BUG: Bad rss-counter state mm:00000000e49acc8b type:MM_FILEPAGES val:33 [ 35.546820] BUG: Bad rss-counter state mm:00000000e49acc8b type:MM_ANONPAGES val:22 [ 35.696148] ================================================================== [ 35.696801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.701847] Read of size 8 at addr ffff88800ecb3df0 by task sshd/221 [ 35.702342] [ 35.702485] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.703026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.703640] Call Trace: [ 35.703843] [ 35.704025] dump_stack_lvl+0x91/0xf0 [ 35.704349] print_report+0xcc/0x620 [ 35.704660] ? __virt_addr_valid+0x102/0x340 [ 35.704978] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.705367] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.705796] kasan_report+0xbe/0xf0 [ 35.706143] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.706594] vma_interval_tree_remove+0xc75/0xec0 [ 35.707036] vma_prepare+0xc54/0x11a0 [ 35.707390] __split_vma+0x5af/0x950 [ 35.707749] ? __pfx___split_vma+0x10/0x10 [ 35.708120] ? find_held_lock+0x2c/0x110 [ 35.708431] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.708778] ? lock_is_held_type+0x9f/0x120 [ 35.709133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.709500] ? mtree_range_walk+0x632/0x900 [ 35.709879] ? mas_walk+0x5c7/0x7c0 [ 35.710234] do_vmi_munmap+0x1f1/0x2b0 [ 35.710589] mmap_region+0x1f9/0x2660 [ 35.710942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.711304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.711835] ? __pfx_lock_acquire+0x10/0x10 [ 35.712223] ? __pfx_mmap_region+0x10/0x10 [ 35.712605] ? security_mmap_addr+0x7d/0xa0 [ 35.713009] ? get_unmapped_area+0x1f5/0x3f0 [ 35.713413] do_mmap+0x854/0xf00 [ 35.713743] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.714110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.714520] ksys_mmap_pgoff+0x3af/0x500 [ 35.714883] do_syscall_64+0x3f/0x90 [ 35.715239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.715699] RIP: 0033:0x7fb54c662d82 [ 35.716022] 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 [ 35.717482] RSP: 002b:00007ffe97ad2c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.718147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb54c662d82 [ 35.718750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb54ba9c000 [ 35.719332] RBP: 00007fb54ba9c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.719918] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560845c1cec0 [ 35.720515] R13: 00007ffe97ad2c30 R14: 00007ffe97ad2c60 R15: 00007ffe97ad2fc0 [ 35.721110] [ 35.721333] [ 35.721491] Allocated by task 214: [ 35.721806] kasan_save_stack+0x22/0x50 [ 35.722180] kasan_set_track+0x25/0x30 [ 35.722548] __kasan_slab_alloc+0x59/0x70 [ 35.722921] kmem_cache_alloc+0x16b/0x370 [ 35.723304] vm_area_dup+0x20/0x160 [ 35.723647] __split_vma+0x170/0x950 [ 35.724000] split_vma+0xc6/0x110 [ 35.724332] mprotect_fixup+0x8d2/0xb30 [ 35.724714] do_mprotect_pkey+0x87e/0xd40 [ 35.725113] __x64_sys_mprotect+0x78/0xc0 [ 35.725495] do_syscall_64+0x3f/0x90 [ 35.725878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.726355] [ 35.726525] Freed by task 214: [ 35.726822] kasan_save_stack+0x22/0x50 [ 35.727206] kasan_set_track+0x25/0x30 [ 35.727579] kasan_save_free_info+0x2b/0x50 [ 35.727970] __kasan_slab_free+0x10a/0x190 [ 35.728372] kmem_cache_free+0x10d/0x4d0 [ 35.728760] rcu_core+0x8c8/0x2860 [ 35.729104] __do_softirq+0x1b7/0x7d4 [ 35.729468] [ 35.729643] Last potentially related work creation: [ 35.730085] kasan_save_stack+0x22/0x50 [ 35.730460] __kasan_record_aux_stack+0x8e/0xa0 [ 35.730890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.731379] remove_vma+0x139/0x170 [ 35.731725] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.732140] do_vmi_munmap+0x1f1/0x2b0 [ 35.732478] __vm_munmap+0x138/0x3a0 [ 35.732821] __x64_sys_munmap+0x59/0x80 [ 35.733181] do_syscall_64+0x3f/0x90 [ 35.733531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.734030] [ 35.734202] Second to last potentially related work creation: [ 35.734708] kasan_save_stack+0x22/0x50 [ 35.735091] __kasan_record_aux_stack+0x8e/0xa0 [ 35.735516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.735993] remove_vma+0x139/0x170 [ 35.736341] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.736763] do_vmi_munmap+0x1f1/0x2b0 [ 35.737119] mmap_region+0x1f9/0x2660 [ 35.737473] do_mmap+0x854/0xf00 [ 35.737811] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.738184] ksys_mmap_pgoff+0x3af/0x500 [ 35.738567] do_syscall_64+0x3f/0x90 [ 35.738920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.739407] [ 35.739572] The buggy address belongs to the object at ffff88800ecb3d98 [ 35.739572] which belongs to the cache vm_area_struct of size 168 [ 35.740665] The buggy address is located 88 bytes inside of [ 35.740665] freed 168-byte region [ffff88800ecb3d98, ffff88800ecb3e40) [ 35.741774] [ 35.741937] The buggy address belongs to the physical page: [ 35.742414] page:00000000ec4e3184 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb3 [ 35.743180] memcg:ffff8880098a3601 [ 35.743500] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.743968] page_type: 0xffffffff() [ 35.744312] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 35.744979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098a3601 [ 35.745612] page dumped because: kasan: bad access detected [ 35.746099] [ 35.746271] Memory state around the buggy address: [ 35.746701] ffff88800ecb3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.747304] ffff88800ecb3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.747910] >ffff88800ecb3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.748504] ^ [ 35.749077] ffff88800ecb3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.749713] ffff88800ecb3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.750319] ================================================================== [ 35.751047] Disabling lock debugging due to kernel taint [ 38.379855] BUG: Bad rss-counter state mm:00000000132b57e0 type:MM_FILEPAGES val:33 [ 38.380520] BUG: Bad rss-counter state mm:00000000132b57e0 type:MM_ANONPAGES val:22 [ 38.945025] BUG: Bad rss-counter state mm:00000000beff39bb type:MM_FILEPAGES val:33 [ 38.945659] BUG: Bad rss-counter state mm:00000000beff39bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13354' (ECDSA) to the list of known hosts. 2023/06/21 10:12:03 fuzzer started 2023/06/21 10:12:04 dialing manager at localhost:36067 2023/06/21 10:12:04 checking machine... 2023/06/21 10:12:04 checking revisions... [ 39.820912] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:12:04 testing simple program... [ 39.867373] cgroup: Unknown subsys name 'net' [ 39.960880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:12:03 Registers: info registers vcpu 0 RAX=ffff888015bcbcc0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018e17e01 RSI=ffff888018e17ed0 RDI=ffff888018e17ed0 RBP=ffff888018e17928 RSP=ffff888018e17860 R8 =0000000000000001 R9 =ffff888018e17910 R10=0000000000038001 R11=0000000000007735 R12=ffff888018e17930 R13=ffff888018e17918 R14=ffff888018e17ed0 R15=ffff888018e178d0 RIP=ffffffff81131236 RFL=00000002 [-------] 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 0000000000000000 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=00007f2b47332328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000607f92e12490 RBX=000000000000000f RCX=0000000000000000 RDX=ffffffff81803d9c RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880087a0c80 RSP=ffff88800f36fa58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800db6d500 R13=0000000000000000 R14=ffff88800f36fab0 R15=ffffea000040b380 RIP=ffffffff81803e14 RFL=00000212 [----A--] 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 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=000055a934e7b650 CR3=0000000008ed2000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=125f5274bb01bcd40000000000000000 XMM05=4a65edbf14e20c023549ab8a789c6ae5 XMM06=d09918322c220e717ac701758bed34ea XMM07=9e35bd0aaf3158a814763eaefeccef6b XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000