syzkaller login: [ 28.768361] sshd (215) used greatest stack depth: 24128 bytes left [ 28.769630] BUG: Bad rss-counter state mm:000000000ec56dff type:MM_FILEPAGES val:33 [ 28.770703] BUG: Bad rss-counter state mm:000000000ec56dff type:MM_ANONPAGES val:22 [ 28.941891] ================================================================== [ 28.942985] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.944103] Read of size 8 at addr ffff88800f0e34e0 by task sshd/222 [ 28.945108] [ 28.945370] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.946256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.947229] Call Trace: [ 28.947551] [ 28.947838] dump_stack_lvl+0x91/0xf0 [ 28.948341] print_report+0xcc/0x620 [ 28.948832] ? __virt_addr_valid+0x102/0x340 [ 28.949387] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.950014] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.950633] kasan_report+0xbe/0xf0 [ 28.951107] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.951727] vma_interval_tree_remove+0xc75/0xec0 [ 28.952332] vma_prepare+0xc54/0x11a0 [ 28.952837] __split_vma+0x5af/0x950 [ 28.953318] ? __pfx___split_vma+0x10/0x10 [ 28.953842] ? find_held_lock+0x2c/0x110 [ 28.954370] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.954943] ? lock_is_held_type+0x9f/0x120 [ 28.955486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.956093] ? mtree_range_walk+0x632/0x900 [ 28.956669] ? mas_walk+0x5c7/0x7c0 [ 28.957140] do_vmi_munmap+0x1f1/0x2b0 [ 28.957634] mmap_region+0x1f9/0x2660 [ 28.958129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.958644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.959370] ? __pfx_lock_acquire+0x10/0x10 [ 28.959904] ? __pfx_mmap_region+0x10/0x10 [ 28.960443] ? security_mmap_addr+0x7d/0xa0 [ 28.960991] ? get_unmapped_area+0x1f5/0x3f0 [ 28.961539] do_mmap+0x854/0xf00 [ 28.961979] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.962484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.963054] ksys_mmap_pgoff+0x3af/0x500 [ 28.963562] do_syscall_64+0x3f/0x90 [ 28.964041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964709] RIP: 0033:0x7f08b13cfd82 [ 28.965165] 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 [ 28.967287] RSP: 002b:00007fffecabdb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.968208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08b13cfd82 [ 28.969062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08b0809000 [ 28.969906] RBP: 00007f08b0809000 R08: 0000000000000009 R09: 0000000000001000 [ 28.970750] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f433aed90 [ 28.971597] R13: 00007fffecabdb60 R14: 00007fffecabdb90 R15: 00007fffecabdef0 [ 28.972446] [ 28.972748] [ 28.972961] Allocated by task 215: [ 28.973391] kasan_save_stack+0x22/0x50 [ 28.973899] kasan_set_track+0x25/0x30 [ 28.974398] __kasan_slab_alloc+0x59/0x70 [ 28.974928] kmem_cache_alloc+0x16b/0x370 [ 28.975445] vm_area_dup+0x20/0x160 [ 28.975894] __split_vma+0x170/0x950 [ 28.976360] split_vma+0xc6/0x110 [ 28.976819] mprotect_fixup+0x8d2/0xb30 [ 28.977323] do_mprotect_pkey+0x87e/0xd40 [ 28.977845] __x64_sys_mprotect+0x78/0xc0 [ 28.978369] do_syscall_64+0x3f/0x90 [ 28.978846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.979494] [ 28.979716] Freed by task 215: [ 28.980111] kasan_save_stack+0x22/0x50 [ 28.980620] kasan_set_track+0x25/0x30 [ 28.981111] kasan_save_free_info+0x2b/0x50 [ 28.981644] __kasan_slab_free+0x10a/0x190 [ 28.982178] kmem_cache_free+0x10d/0x4d0 [ 28.982688] rcu_core+0x8c8/0x2860 [ 28.983133] __do_softirq+0x1b7/0x7d4 [ 28.983623] [ 28.983841] Last potentially related work creation: [ 28.984453] kasan_save_stack+0x22/0x50 [ 28.984976] __kasan_record_aux_stack+0x8e/0xa0 [ 28.985558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.986207] remove_vma+0x139/0x170 [ 28.986674] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.987235] do_vmi_munmap+0x1f1/0x2b0 [ 28.987728] __vm_munmap+0x138/0x3a0 [ 28.988202] __x64_sys_munmap+0x59/0x80 [ 28.988722] do_syscall_64+0x3f/0x90 [ 28.989204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.989859] [ 28.990077] Second to last potentially related work creation: [ 28.990776] kasan_save_stack+0x22/0x50 [ 28.991284] __kasan_record_aux_stack+0x8e/0xa0 [ 28.991862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.992524] remove_vma+0x139/0x170 [ 28.992981] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.993546] do_vmi_munmap+0x1f1/0x2b0 [ 28.994036] mmap_region+0x1f9/0x2660 [ 28.994526] do_mmap+0x854/0xf00 [ 28.994970] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.995467] ksys_mmap_pgoff+0x3af/0x500 [ 28.995968] do_syscall_64+0x3f/0x90 [ 28.996450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.997113] [ 28.997334] The buggy address belongs to the object at ffff88800f0e3488 [ 28.997334] which belongs to the cache vm_area_struct of size 168 [ 28.998838] The buggy address is located 88 bytes inside of [ 28.998838] freed 168-byte region [ffff88800f0e3488, ffff88800f0e3530) [ 29.000269] [ 29.000494] The buggy address belongs to the physical page: [ 29.001168] page:00000000c85154c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0e3 [ 29.002272] memcg:ffff88800d0e4401 [ 29.002702] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.003359] page_type: 0xffffffff() [ 29.003814] raw: 0100000000000200 ffff8880087a0c80 ffffea0000590640 dead000000000004 [ 29.004775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0e4401 [ 29.005702] page dumped because: kasan: bad access detected [ 29.006371] [ 29.006588] Memory state around the buggy address: [ 29.007181] ffff88800f0e3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.008058] ffff88800f0e3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.008946] >ffff88800f0e3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.009805] ^ [ 29.010565] ffff88800f0e3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.011451] ffff88800f0e3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.012320] ================================================================== [ 29.013405] Disabling lock debugging due to kernel taint [ 31.060791] BUG: Bad rss-counter state mm:000000001021924e type:MM_FILEPAGES val:33 [ 31.061807] BUG: Bad rss-counter state mm:000000001021924e type:MM_ANONPAGES val:22 [ 31.566774] BUG: Bad rss-counter state mm:000000001b768234 type:MM_FILEPAGES val:33 [ 31.568030] BUG: Bad rss-counter state mm:000000001b768234 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46744' (ECDSA) to the list of known hosts. 2023/06/20 12:50:54 fuzzer started 2023/06/20 12:50:55 dialing manager at localhost:36067 2023/06/20 12:50:55 checking machine... 2023/06/20 12:50:55 checking revisions... [ 32.178241] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:50:55 testing simple program... [ 32.214692] cgroup: Unknown subsys name 'net' [ 32.261632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:50:54 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888008d9f870 R8 =ffffffff8608a556 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc5d 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 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=00007f11662290b0 CR3=000000001b46c000 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=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=00007fe7dcb9ada0 CR3=000000000c726000 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=7ad012870dee11a2ac442e72a1a033e8 XMM02=2c67c8bc2e329bc30000000000119c50 XMM03=fb795ef6d65770560000000000120da8 XMM04=2bbc4010aac8c59800000000000ae988 XMM05=5a9d233068761c4a0000000000132908 XMM06=accc3fb3cbb6f65c0000000000131770 XMM07=e042d86d42eb936e0000000000121028 XMM08=5f9abfea5f8b80cf0000000000119cb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000