syzkaller login: [ 37.717875] BUG: Bad rss-counter state mm:00000000c25fe6df type:MM_FILEPAGES val:33 [ 37.719085] BUG: Bad rss-counter state mm:00000000c25fe6df type:MM_ANONPAGES val:22 [ 37.869236] ================================================================== [ 37.870141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.871093] Read of size 8 at addr ffff88800f35bd08 by task sshd/220 [ 37.871862] [ 37.872084] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.873038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.873976] Call Trace: [ 37.874287] [ 37.874569] dump_stack_lvl+0x91/0xf0 [ 37.875061] print_report+0xcc/0x620 [ 37.875544] ? __virt_addr_valid+0x102/0x340 [ 37.876089] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.876707] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.877342] kasan_report+0xbe/0xf0 [ 37.877807] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.878417] vma_interval_tree_remove+0xc75/0xec0 [ 37.878999] vma_prepare+0xc54/0x11a0 [ 37.879467] __split_vma+0x5af/0x950 [ 37.879923] ? __pfx___split_vma+0x10/0x10 [ 37.880439] ? find_held_lock+0x2c/0x110 [ 37.880953] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.881500] ? lock_is_held_type+0x9f/0x120 [ 37.882020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.882604] ? mtree_range_walk+0x632/0x900 [ 37.883143] ? mas_walk+0x5c7/0x7c0 [ 37.883602] do_vmi_munmap+0x1f1/0x2b0 [ 37.884094] mmap_region+0x1f9/0x2660 [ 37.884573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.885096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.885798] ? __pfx_lock_acquire+0x10/0x10 [ 37.886313] ? __pfx_mmap_region+0x10/0x10 [ 37.886825] ? security_mmap_addr+0x7d/0xa0 [ 37.887349] ? get_unmapped_area+0x1f5/0x3f0 [ 37.887884] do_mmap+0x854/0xf00 [ 37.888306] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.888802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.889359] ksys_mmap_pgoff+0x3af/0x500 [ 37.889853] do_syscall_64+0x3f/0x90 [ 37.890320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.890944] RIP: 0033:0x7fecad5a1d82 [ 37.891387] 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 [ 37.893448] RSP: 002b:00007ffdf5dbe2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.894320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecad5a1d82 [ 37.895134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecac9db000 [ 37.895994] RBP: 00007fecac9db000 R08: 0000000000000009 R09: 0000000000001000 [ 37.896859] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587e738ff70 [ 37.897696] R13: 00007ffdf5dbe2c0 R14: 00007ffdf5dbe2f0 R15: 00007ffdf5dbe650 [ 37.898550] [ 37.898842] [ 37.899056] Allocated by task 213: [ 37.899486] kasan_save_stack+0x22/0x50 [ 37.899993] kasan_set_track+0x25/0x30 [ 37.900496] __kasan_slab_alloc+0x59/0x70 [ 37.901013] kmem_cache_alloc+0x16b/0x370 [ 37.901522] vm_area_dup+0x20/0x160 [ 37.901978] __split_vma+0x170/0x950 [ 37.902441] split_vma+0xc6/0x110 [ 37.902874] mprotect_fixup+0x8d2/0xb30 [ 37.903374] do_mprotect_pkey+0x87e/0xd40 [ 37.903889] __x64_sys_mprotect+0x78/0xc0 [ 37.904422] do_syscall_64+0x3f/0x90 [ 37.904894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.905530] [ 37.905743] Freed by task 202: [ 37.906172] kasan_save_stack+0x22/0x50 [ 37.906678] kasan_set_track+0x25/0x30 [ 37.907168] kasan_save_free_info+0x2b/0x50 [ 37.907701] __kasan_slab_free+0x10a/0x190 [ 37.908236] kmem_cache_free+0x10d/0x4d0 [ 37.908755] rcu_core+0x8c8/0x2860 [ 37.909200] __do_softirq+0x1b7/0x7d4 [ 37.909675] [ 37.909895] Last potentially related work creation: [ 37.910476] kasan_save_stack+0x22/0x50 [ 37.910980] __kasan_record_aux_stack+0x8e/0xa0 [ 37.911553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.912210] remove_vma+0x139/0x170 [ 37.912697] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.913282] do_vmi_munmap+0x1f1/0x2b0 [ 37.913793] __vm_munmap+0x138/0x3a0 [ 37.914284] __x64_sys_munmap+0x59/0x80 [ 37.914784] do_syscall_64+0x3f/0x90 [ 37.915269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.915918] [ 37.916129] The buggy address belongs to the object at ffff88800f35bcb0 [ 37.916129] which belongs to the cache vm_area_struct of size 168 [ 37.917678] The buggy address is located 88 bytes inside of [ 37.917678] freed 168-byte region [ffff88800f35bcb0, ffff88800f35bd58) [ 37.919098] [ 37.919317] The buggy address belongs to the physical page: [ 37.919986] page:00000000492b5b45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf35b [ 37.921103] memcg:ffff888019cf7001 [ 37.921532] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.922184] page_type: 0xffffffff() [ 37.922634] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.923553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cf7001 [ 37.924487] page dumped because: kasan: bad access detected [ 37.925146] [ 37.925367] Memory state around the buggy address: [ 37.925947] ffff88800f35bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.926804] ffff88800f35bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.927665] >ffff88800f35bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.928530] ^ [ 37.928973] ffff88800f35bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.929823] ffff88800f35be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.930670] ================================================================== [ 37.931669] Disabling lock debugging due to kernel taint [ 39.482498] BUG: Bad rss-counter state mm:0000000068fee39f type:MM_FILEPAGES val:33 [ 39.483587] BUG: Bad rss-counter state mm:0000000068fee39f type:MM_ANONPAGES val:22 [ 39.863011] BUG: Bad rss-counter state mm:000000006cf9f921 type:MM_FILEPAGES val:33 [ 39.864090] BUG: Bad rss-counter state mm:000000006cf9f921 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32251' (ECDSA) to the list of known hosts. 2023/06/20 06:33:31 fuzzer started 2023/06/20 06:33:31 dialing manager at localhost:44161 2023/06/20 06:33:31 checking machine... 2023/06/20 06:33:31 checking revisions... [ 40.631854] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:33:31 testing simple program... [ 40.676528] cgroup: Unknown subsys name 'net' [ 40.727387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800f0f7bf0 RSI=ffff88800f0f7bb8 RDI=ffff88800f0f7828 RBP=ffff88800f0f78c0 RSP=ffff88800f0f7820 R8 =0000000000000001 R9 =ffff88800f0f7868 R10=0000000000038001 R11=000000000000fc0f R12=ffff88800f0f78f0 R13=0000000000000000 R14=ffff888016deb680 R15=0000000000000002 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f9c36c40900 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=00007f9c36c1f020 CR3=000000000c624000 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=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=00007f7811630000 CR3=0000000016b7e000 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=2031333a33333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a33333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000