syzkaller login: [ 38.838218] BUG: Bad rss-counter state mm:0000000071f2562b type:MM_FILEPAGES val:33 [ 38.839427] BUG: Bad rss-counter state mm:0000000071f2562b type:MM_ANONPAGES val:22 [ 38.876693] ================================================================== [ 38.877755] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.878850] Read of size 8 at addr ffff88800df02798 by task sshd/218 [ 38.879631] [ 38.879853] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.880759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881747] Call Trace: [ 38.882071] [ 38.882379] dump_stack_lvl+0x91/0xf0 [ 38.882875] print_report+0xcc/0x620 [ 38.883368] ? __virt_addr_valid+0x102/0x340 [ 38.883920] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884583] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885203] kasan_report+0xbe/0xf0 [ 38.885674] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886317] vma_interval_tree_remove+0xc75/0xec0 [ 38.886913] vma_prepare+0xc54/0x11a0 [ 38.887408] __split_vma+0x5af/0x950 [ 38.887875] ? __pfx___split_vma+0x10/0x10 [ 38.888427] ? find_held_lock+0x2c/0x110 [ 38.888947] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.889525] ? lock_is_held_type+0x9f/0x120 [ 38.890063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.890673] ? mtree_range_walk+0x632/0x900 [ 38.891247] ? mas_walk+0x5c7/0x7c0 [ 38.891719] do_vmi_munmap+0x1f1/0x2b0 [ 38.892277] mmap_region+0x1f9/0x2660 [ 38.892761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.893288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.893996] ? __pfx_lock_acquire+0x10/0x10 [ 38.894564] ? __pfx_mmap_region+0x10/0x10 [ 38.895127] ? security_mmap_addr+0x7d/0xa0 [ 38.895674] ? get_unmapped_area+0x1f5/0x3f0 [ 38.896285] do_mmap+0x854/0xf00 [ 38.896737] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.897834] ksys_mmap_pgoff+0x3af/0x500 [ 38.898355] do_syscall_64+0x3f/0x90 [ 38.898830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899486] RIP: 0033:0x7f41331b2d82 [ 38.899939] 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 [ 38.902099] RSP: 002b:00007ffde34bbbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.903008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41331b2d82 [ 38.903870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41325ec000 [ 38.904741] RBP: 00007f41325ec000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905588] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633f0208ec0 [ 38.906455] R13: 00007ffde34bbbf0 R14: 00007ffde34bbc20 R15: 00007ffde34bbf80 [ 38.907324] [ 38.907616] [ 38.907830] Allocated by task 211: [ 38.908293] kasan_save_stack+0x22/0x50 [ 38.908791] kasan_set_track+0x25/0x30 [ 38.909298] __kasan_slab_alloc+0x59/0x70 [ 38.909825] kmem_cache_alloc+0x16b/0x370 [ 38.910385] vm_area_dup+0x20/0x160 [ 38.910860] __split_vma+0x170/0x950 [ 38.911369] split_vma+0xc6/0x110 [ 38.911837] mprotect_fixup+0x8d2/0xb30 [ 38.912382] do_mprotect_pkey+0x87e/0xd40 [ 38.912930] __x64_sys_mprotect+0x78/0xc0 [ 38.913480] do_syscall_64+0x3f/0x90 [ 38.913977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914657] [ 38.914875] Freed by task 211: [ 38.915285] kasan_save_stack+0x22/0x50 [ 38.915788] kasan_set_track+0x25/0x30 [ 38.916333] kasan_save_free_info+0x2b/0x50 [ 38.916861] __kasan_slab_free+0x10a/0x190 [ 38.917398] kmem_cache_free+0x10d/0x4d0 [ 38.917909] rcu_core+0x8c8/0x2860 [ 38.918367] __do_softirq+0x1b7/0x7d4 [ 38.918842] [ 38.919061] Last potentially related work creation: [ 38.919651] kasan_save_stack+0x22/0x50 [ 38.920181] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921412] remove_vma+0x139/0x170 [ 38.921860] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922433] do_vmi_munmap+0x1f1/0x2b0 [ 38.922917] __vm_munmap+0x138/0x3a0 [ 38.923400] __x64_sys_munmap+0x59/0x80 [ 38.923895] do_syscall_64+0x3f/0x90 [ 38.924400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925042] [ 38.925271] Second to last potentially related work creation: [ 38.925956] kasan_save_stack+0x22/0x50 [ 38.926487] __kasan_record_aux_stack+0x8e/0xa0 [ 38.927053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927699] remove_vma+0x139/0x170 [ 38.928177] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928726] do_vmi_munmap+0x1f1/0x2b0 [ 38.929220] mmap_region+0x1f9/0x2660 [ 38.929690] do_mmap+0x854/0xf00 [ 38.930124] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.930607] ksys_mmap_pgoff+0x3af/0x500 [ 38.931118] do_syscall_64+0x3f/0x90 [ 38.931616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932287] [ 38.932500] The buggy address belongs to the object at ffff88800df02740 [ 38.932500] which belongs to the cache vm_area_struct of size 168 [ 38.933970] The buggy address is located 88 bytes inside of [ 38.933970] freed 168-byte region [ffff88800df02740, ffff88800df027e8) [ 38.935392] [ 38.935610] The buggy address belongs to the physical page: [ 38.936314] page:000000008ae384fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf02 [ 38.937401] memcg:ffff88800df03d01 [ 38.937826] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.938471] page_type: 0xffffffff() [ 38.938920] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370e40 dead000000000002 [ 38.939848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df03d01 [ 38.940777] page dumped because: kasan: bad access detected [ 38.941452] [ 38.941666] Memory state around the buggy address: [ 38.942260] ffff88800df02680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.943133] ffff88800df02700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.943992] >ffff88800df02780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.944843] ^ [ 38.945344] ffff88800df02800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.946218] ffff88800df02880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.947063] ================================================================== [ 38.948224] Disabling lock debugging due to kernel taint [ 40.851128] BUG: Bad rss-counter state mm:000000003120df71 type:MM_FILEPAGES val:33 [ 40.851958] BUG: Bad rss-counter state mm:000000003120df71 type:MM_ANONPAGES val:22 [ 41.345127] BUG: Bad rss-counter state mm:000000006b69f56f type:MM_FILEPAGES val:33 [ 41.346308] BUG: Bad rss-counter state mm:000000006b69f56f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16107' (ECDSA) to the list of known hosts. 2023/06/21 06:23:51 fuzzer started 2023/06/21 06:23:52 dialing manager at localhost:36067 2023/06/21 06:23:52 checking machine... 2023/06/21 06:23:52 checking revisions... [ 42.071256] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:23:52 testing simple program... [ 42.128495] cgroup: Unknown subsys name 'net' [ 42.219595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:23:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800f131b40 RSI=ffffffff83682741 RDI=0000000000000005 RBP=ffff88800fd10000 RSP=ffff88800eb07998 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00030009ff02000a R12=ffffffff83867afd R13=ffff888019068000 R14=ffff88800eb07a88 R15=00000000000000a4 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007f5f9a229900 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=00007f5f9a7e0618 CR3=000000000eeee000 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=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=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=00007f9fc1b11338 CR3=000000000d662000 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=19eb28d6e66a2da98e4c8591713c02bb XMM02=ec2efd57dc4c00df000000000011ccb0 XMM03=1976a3cd4faf3669000000000011cd80 XMM04=219dd40a59c44da300000000000ae988 XMM05=751b9502027dc0b90000000000133a08 XMM06=c8f8bb98efd173a80000000000132be0 XMM07=e042d86d42eb936e0000000000122df8 XMM08=1976a3cd4faf3669000000000011cd80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000