syzkaller login: [ 37.390025] BUG: Bad rss-counter state mm:000000004b44c0ac type:MM_FILEPAGES val:33 [ 37.391263] BUG: Bad rss-counter state mm:000000004b44c0ac type:MM_ANONPAGES val:22 [ 37.437357] ================================================================== [ 37.438281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.439373] Read of size 8 at addr ffff8880197c4968 by task sshd/220 [ 37.440142] [ 37.440364] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.441260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.442249] Call Trace: [ 37.442571] [ 37.442852] dump_stack_lvl+0x91/0xf0 [ 37.443342] print_report+0xcc/0x620 [ 37.443826] ? __virt_addr_valid+0x102/0x340 [ 37.444374] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.445004] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.445627] kasan_report+0xbe/0xf0 [ 37.446102] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.446729] vma_interval_tree_remove+0xc75/0xec0 [ 37.447331] vma_prepare+0xc54/0x11a0 [ 37.447810] __split_vma+0x5af/0x950 [ 37.448279] ? __pfx___split_vma+0x10/0x10 [ 37.448828] ? find_held_lock+0x2c/0x110 [ 37.449360] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.449921] ? lock_is_held_type+0x9f/0x120 [ 37.450459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.451072] ? mtree_range_walk+0x632/0x900 [ 37.451634] ? mas_walk+0x5c7/0x7c0 [ 37.452113] do_vmi_munmap+0x1f1/0x2b0 [ 37.452617] mmap_region+0x1f9/0x2660 [ 37.453101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.453610] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.454323] ? __pfx_lock_acquire+0x10/0x10 [ 37.454861] ? __pfx_mmap_region+0x10/0x10 [ 37.455388] ? security_mmap_addr+0x7d/0xa0 [ 37.455916] ? get_unmapped_area+0x1f5/0x3f0 [ 37.456482] do_mmap+0x854/0xf00 [ 37.456927] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.457418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.457990] ksys_mmap_pgoff+0x3af/0x500 [ 37.458502] do_syscall_64+0x3f/0x90 [ 37.458978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.459626] RIP: 0033:0x7f6a9d5ced82 [ 37.460084] 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 [ 37.462208] RSP: 002b:00007ffef0cad3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.463108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a9d5ced82 [ 37.463973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a9ca08000 [ 37.464828] RBP: 00007f6a9ca08000 R08: 0000000000000009 R09: 0000000000001000 [ 37.465681] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb79ee0ec0 [ 37.466523] R13: 00007ffef0cad3e0 R14: 00007ffef0cad410 R15: 00007ffef0cad770 [ 37.467378] [ 37.467672] [ 37.467888] Allocated by task 213: [ 37.468315] kasan_save_stack+0x22/0x50 [ 37.468844] kasan_set_track+0x25/0x30 [ 37.469336] __kasan_slab_alloc+0x59/0x70 [ 37.469855] kmem_cache_alloc+0x16b/0x370 [ 37.470367] vm_area_dup+0x20/0x160 [ 37.470820] __split_vma+0x170/0x950 [ 37.471283] split_vma+0xc6/0x110 [ 37.471731] mprotect_fixup+0x8d2/0xb30 [ 37.472229] do_mprotect_pkey+0x87e/0xd40 [ 37.472758] __x64_sys_mprotect+0x78/0xc0 [ 37.473280] do_syscall_64+0x3f/0x90 [ 37.473754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.474390] [ 37.474605] Freed by task 203: [ 37.475008] kasan_save_stack+0x22/0x50 [ 37.475508] kasan_set_track+0x25/0x30 [ 37.476002] kasan_save_free_info+0x2b/0x50 [ 37.476556] __kasan_slab_free+0x10a/0x190 [ 37.477089] kmem_cache_free+0x10d/0x4d0 [ 37.477596] rcu_core+0x8c8/0x2860 [ 37.478039] __do_softirq+0x1b7/0x7d4 [ 37.478519] [ 37.478738] Last potentially related work creation: [ 37.479316] kasan_save_stack+0x22/0x50 [ 37.479827] __kasan_record_aux_stack+0x8e/0xa0 [ 37.480410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.481060] remove_vma+0x139/0x170 [ 37.481512] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.482174] do_vmi_munmap+0x1f1/0x2b0 [ 37.482660] __vm_munmap+0x138/0x3a0 [ 37.483130] __x64_sys_munmap+0x59/0x80 [ 37.483623] do_syscall_64+0x3f/0x90 [ 37.484093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.484750] [ 37.484963] The buggy address belongs to the object at ffff8880197c4910 [ 37.484963] which belongs to the cache vm_area_struct of size 168 [ 37.486441] The buggy address is located 88 bytes inside of [ 37.486441] freed 168-byte region [ffff8880197c4910, ffff8880197c49b8) [ 37.487832] [ 37.488051] The buggy address belongs to the physical page: [ 37.488716] page:000000007665d185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197c4 [ 37.489813] memcg:ffff888009966c01 [ 37.490245] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.490888] page_type: 0xffffffff() [ 37.491340] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.492257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009966c01 [ 37.493175] page dumped because: kasan: bad access detected [ 37.493835] [ 37.494049] Memory state around the buggy address: [ 37.494638] ffff8880197c4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.495489] ffff8880197c4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.496351] >ffff8880197c4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.497226] ^ [ 37.498005] ffff8880197c4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.498863] ffff8880197c4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.499720] ================================================================== [ 37.500714] Disabling lock debugging due to kernel taint [ 39.239292] BUG: Bad rss-counter state mm:0000000056e8a7f9 type:MM_FILEPAGES val:33 [ 39.240013] BUG: Bad rss-counter state mm:0000000056e8a7f9 type:MM_ANONPAGES val:22 [ 39.649800] BUG: Bad rss-counter state mm:00000000f02a7252 type:MM_FILEPAGES val:33 [ 39.650891] BUG: Bad rss-counter state mm:00000000f02a7252 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61414' (ECDSA) to the list of known hosts. 2023/06/19 12:11:12 fuzzer started 2023/06/19 12:11:12 dialing manager at localhost:44161 2023/06/19 12:11:12 checking machine... 2023/06/19 12:11:12 checking revisions... [ 40.326451] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:11:12 testing simple program... [ 40.368908] cgroup: Unknown subsys name 'net' [ 40.431759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:11:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f6c5c38 RCX=0000000000000000 RDX=1ffff11003226b9f RSI=ffffffff81f05956 RDI=ffff888019135cf8 RBP=ffff888019135cc0 RSP=ffff8880183efbf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019135cc0 R13=ffff888019135e68 R14=ffff888019135d48 R15=ffff888019135d98 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 00007f8f5009e900 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=00007f8f50655618 CR3=0000000019670000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fb0c0570b50 CR3=0000000008f74000 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=8be5600bc6d14485c04bcba169bf86c6 XMM02=000000000011dec8ec2efd57dc4c00df XMM03=0000000000124ca8583775888e43c74c XMM04=cc5f3759576cf24700000000000ae988 XMM05=59d5b690e0af863b00000000001347b0 XMM06=fb195cb19903e8550000000000133618 XMM07=e042d86d42eb936e0000000000124f28 XMM08=583775888e43c74c000000000011df28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000