Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.533573] BUG: Bad rss-counter state mm:0000000017ea5f87 type:MM_FILEPAGES val:33 [ 24.535381] BUG: Bad rss-counter state mm:0000000017ea5f87 type:MM_ANONPAGES val:22 [ 24.684891] ================================================================== [ 24.685990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.687290] Read of size 8 at addr ffff88800e869058 by task sshd/219 [ 24.688155] [ 24.688370] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.689233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.690246] Call Trace: [ 24.690566] [ 24.690858] dump_stack_lvl+0x91/0xf0 [ 24.691344] print_report+0xcc/0x620 [ 24.691823] ? __virt_addr_valid+0x102/0x340 [ 24.692374] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.692994] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.693611] kasan_report+0xbe/0xf0 [ 24.694080] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.694692] vma_interval_tree_remove+0xc75/0xec0 [ 24.695298] vma_prepare+0xc54/0x11a0 [ 24.695778] __split_vma+0x5af/0x950 [ 24.696241] ? __pfx___split_vma+0x10/0x10 [ 24.696768] ? find_held_lock+0x2c/0x110 [ 24.697282] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.697845] ? lock_is_held_type+0x9f/0x120 [ 24.698386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.699035] ? mtree_range_walk+0x632/0x900 [ 24.699626] ? mas_walk+0x5c7/0x7c0 [ 24.700127] do_vmi_munmap+0x1f1/0x2b0 [ 24.700676] mmap_region+0x1f9/0x2660 [ 24.701199] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.701759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.702537] ? __pfx_lock_acquire+0x10/0x10 [ 24.703130] ? __pfx_mmap_region+0x10/0x10 [ 24.703704] ? security_mmap_addr+0x7d/0xa0 [ 24.704261] ? get_unmapped_area+0x1f5/0x3f0 [ 24.704829] do_mmap+0x854/0xf00 [ 24.705282] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.705797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.706384] ksys_mmap_pgoff+0x3af/0x500 [ 24.706923] do_syscall_64+0x3f/0x90 [ 24.707416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.708086] RIP: 0033:0x7fe068ccad82 [ 24.708557] 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 [ 24.710791] RSP: 002b:00007ffffd09d648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.711738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe068ccad82 [ 24.712623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe068104000 [ 24.713497] RBP: 00007fe068104000 R08: 0000000000000009 R09: 0000000000001000 [ 24.714380] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578edeb5f70 [ 24.715274] R13: 00007ffffd09d660 R14: 00007ffffd09d690 R15: 00007ffffd09d9f0 [ 24.716167] [ 24.716469] [ 24.716691] Allocated by task 212: [ 24.717134] kasan_save_stack+0x22/0x50 [ 24.717668] kasan_set_track+0x25/0x30 [ 24.718180] __kasan_slab_alloc+0x59/0x70 [ 24.718722] kmem_cache_alloc+0x16b/0x370 [ 24.719282] vm_area_dup+0x20/0x160 [ 24.719763] __split_vma+0x170/0x950 [ 24.720248] split_vma+0xc6/0x110 [ 24.720700] mprotect_fixup+0x8d2/0xb30 [ 24.721228] do_mprotect_pkey+0x87e/0xd40 [ 24.721769] __x64_sys_mprotect+0x78/0xc0 [ 24.722316] do_syscall_64+0x3f/0x90 [ 24.722812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.723483] [ 24.723698] Freed by task 212: [ 24.724091] kasan_save_stack+0x22/0x50 [ 24.724594] kasan_set_track+0x25/0x30 [ 24.725089] kasan_save_free_info+0x2b/0x50 [ 24.725623] __kasan_slab_free+0x10a/0x190 [ 24.726161] kmem_cache_free+0x10d/0x4d0 [ 24.726664] rcu_core+0x8c8/0x2860 [ 24.727127] __do_softirq+0x1b7/0x7d4 [ 24.727610] [ 24.727825] Last potentially related work creation: [ 24.728494] kasan_save_stack+0x22/0x50 [ 24.728997] __kasan_record_aux_stack+0x8e/0xa0 [ 24.729575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.730222] remove_vma+0x139/0x170 [ 24.730677] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.731250] do_vmi_munmap+0x1f1/0x2b0 [ 24.731733] __vm_munmap+0x138/0x3a0 [ 24.732202] __x64_sys_munmap+0x59/0x80 [ 24.732711] do_syscall_64+0x3f/0x90 [ 24.733188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.733833] [ 24.734048] Second to last potentially related work creation: [ 24.734734] kasan_save_stack+0x22/0x50 [ 24.735257] __kasan_record_aux_stack+0x8e/0xa0 [ 24.735833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.736482] remove_vma+0x139/0x170 [ 24.736937] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.737497] do_vmi_munmap+0x1f1/0x2b0 [ 24.737998] mmap_region+0x1f9/0x2660 [ 24.738480] do_mmap+0x854/0xf00 [ 24.738938] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.739432] ksys_mmap_pgoff+0x3af/0x500 [ 24.739937] do_syscall_64+0x3f/0x90 [ 24.740412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.741051] [ 24.741267] The buggy address belongs to the object at ffff88800e869000 [ 24.741267] which belongs to the cache vm_area_struct of size 168 [ 24.742798] The buggy address is located 88 bytes inside of [ 24.742798] freed 168-byte region [ffff88800e869000, ffff88800e8690a8) [ 24.744213] [ 24.744432] The buggy address belongs to the physical page: [ 24.745091] page:00000000622a4c7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe869 [ 24.746188] memcg:ffff88800fe21a01 [ 24.746621] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.747290] page_type: 0xffffffff() [ 24.747749] raw: 0100000000000200 ffff88800879fc80 ffffea000039fb80 dead000000000006 [ 24.748674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe21a01 [ 24.749574] page dumped because: kasan: bad access detected [ 24.750244] [ 24.750459] Memory state around the buggy address: [ 24.751052] ffff88800e868f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.751938] ffff88800e868f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.752790] >ffff88800e869000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.753658] ^ [ 24.754403] ffff88800e869080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.755278] ffff88800e869100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.756136] ================================================================== [ 24.757065] Disabling lock debugging due to kernel taint [ 26.733724] BUG: Bad rss-counter state mm:00000000a3814433 type:MM_FILEPAGES val:33 [ 26.734729] BUG: Bad rss-counter state mm:00000000a3814433 type:MM_ANONPAGES val:22 [ 27.247245] BUG: Bad rss-counter state mm:000000000e0fdb7b type:MM_FILEPAGES val:33 [ 27.248319] BUG: Bad rss-counter state mm:000000000e0fdb7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23534' (ECDSA) to the list of known hosts. 2023/06/19 20:05:42 fuzzer started 2023/06/19 20:05:42 dialing manager at localhost:44161 2023/06/19 20:05:42 checking machine... 2023/06/19 20:05:42 checking revisions... [ 27.991982] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:05:42 testing simple program... [ 28.036873] cgroup: Unknown subsys name 'net' [ 28.120048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:41 Registers: info registers vcpu 0 RAX=ffffffff81847452 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=1ffff11002bade9f RSI=0000000000000000 RDI=ffffffff81847452 RBP=ffff888015d6f4f8 RSP=ffff888015d6f490 R8 =ffffffff8613daa0 R9 =ffff888015d6f4e0 R10=0000000000038001 R11=0000000000021e78 R12=ffff888015d6f568 R13=0000000000000000 R14=ffff88800f798000 R15=ffff88800dc0f390 RIP=ffffffff811303b9 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 00007fd7b5e05700 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=00007fedd6ca1160 CR3=000000000c616000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373636342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880167d9af8 RCX=1ffff11002d4b6f2 RDX=1ffff11002cfb35f RSI=ffffffff87b86f80 RDI=ffff8880167dc050 RBP=ffff8880167dce40 RSP=ffff88806cf09de8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=0000000000000287 R13=ffff8880167dc048 R14=ffffffff818d9dc6 R15=ffff88800deee680 RIP=ffffffff84513679 RFL=00000046 [---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 00007f4bca2b8900 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=00007f4bca297020 CR3=000000000f264000 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=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