syzkaller login: [ 62.332822] BUG: Bad rss-counter state mm:00000000cf972d82 type:MM_FILEPAGES val:33 [ 62.334033] BUG: Bad rss-counter state mm:00000000cf972d82 type:MM_ANONPAGES val:22 [ 62.466051] ================================================================== [ 62.466999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.467944] Read of size 8 at addr ffff88800dcbd140 by task sshd/218 [ 62.468804] [ 62.469059] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.469941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.470979] Call Trace: [ 62.471321] [ 62.471605] dump_stack_lvl+0x91/0xf0 [ 62.472098] print_report+0xcc/0x620 [ 62.472602] ? __virt_addr_valid+0x102/0x340 [ 62.473160] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.473781] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.474408] kasan_report+0xbe/0xf0 [ 62.474898] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.475525] vma_interval_tree_remove+0xc75/0xec0 [ 62.476132] vma_prepare+0xc54/0x11a0 [ 62.476611] __split_vma+0x5af/0x950 [ 62.477101] ? __pfx___split_vma+0x10/0x10 [ 62.477628] ? find_held_lock+0x2c/0x110 [ 62.478151] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.478737] ? lock_is_held_type+0x9f/0x120 [ 62.479316] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.479958] ? mtree_range_walk+0x632/0x900 [ 62.480521] ? mas_walk+0x5c7/0x7c0 [ 62.480991] do_vmi_munmap+0x1f1/0x2b0 [ 62.481485] mmap_region+0x1f9/0x2660 [ 62.481976] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.482492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.483213] ? __pfx_lock_acquire+0x10/0x10 [ 62.483737] ? __pfx_mmap_region+0x10/0x10 [ 62.484277] ? security_mmap_addr+0x7d/0xa0 [ 62.484814] ? get_unmapped_area+0x1f5/0x3f0 [ 62.485361] do_mmap+0x854/0xf00 [ 62.485808] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.486297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.486886] ksys_mmap_pgoff+0x3af/0x500 [ 62.487390] do_syscall_64+0x3f/0x90 [ 62.487868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.488515] RIP: 0033:0x7fc7576ddd82 [ 62.488970] 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 [ 62.491103] RSP: 002b:00007ffcc1398948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.492017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7576ddd82 [ 62.492862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc756b17000 [ 62.493705] RBP: 00007fc756b17000 R08: 0000000000000009 R09: 0000000000001000 [ 62.494556] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558171538ec0 [ 62.495417] R13: 00007ffcc1398960 R14: 00007ffcc1398990 R15: 00007ffcc1398cf0 [ 62.496276] [ 62.496569] [ 62.496792] Allocated by task 211: [ 62.497245] kasan_save_stack+0x22/0x50 [ 62.497751] kasan_set_track+0x25/0x30 [ 62.498244] __kasan_slab_alloc+0x59/0x70 [ 62.498776] kmem_cache_alloc+0x16b/0x370 [ 62.499287] vm_area_dup+0x20/0x160 [ 62.499735] __split_vma+0x170/0x950 [ 62.500199] split_vma+0xc6/0x110 [ 62.500632] mprotect_fixup+0x8d2/0xb30 [ 62.501137] do_mprotect_pkey+0x87e/0xd40 [ 62.501656] __x64_sys_mprotect+0x78/0xc0 [ 62.502169] do_syscall_64+0x3f/0x90 [ 62.502633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.503290] [ 62.503506] Freed by task 211: [ 62.503896] kasan_save_stack+0x22/0x50 [ 62.504398] kasan_set_track+0x25/0x30 [ 62.504887] kasan_save_free_info+0x2b/0x50 [ 62.505431] __kasan_slab_free+0x10a/0x190 [ 62.505963] kmem_cache_free+0x10d/0x4d0 [ 62.506479] rcu_core+0x8c8/0x2860 [ 62.506935] __do_softirq+0x1b7/0x7d4 [ 62.507418] [ 62.507634] Last potentially related work creation: [ 62.508230] kasan_save_stack+0x22/0x50 [ 62.508729] __kasan_record_aux_stack+0x8e/0xa0 [ 62.509310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.509947] remove_vma+0x139/0x170 [ 62.510473] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.511049] do_vmi_munmap+0x1f1/0x2b0 [ 62.511526] __vm_munmap+0x138/0x3a0 [ 62.512008] __x64_sys_munmap+0x59/0x80 [ 62.512498] do_syscall_64+0x3f/0x90 [ 62.512964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.513596] [ 62.513810] Second to last potentially related work creation: [ 62.514505] kasan_save_stack+0x22/0x50 [ 62.515037] __kasan_record_aux_stack+0x8e/0xa0 [ 62.515624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.516285] remove_vma+0x139/0x170 [ 62.516759] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.517335] do_vmi_munmap+0x1f1/0x2b0 [ 62.517846] mmap_region+0x1f9/0x2660 [ 62.518344] do_mmap+0x854/0xf00 [ 62.518813] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.519326] ksys_mmap_pgoff+0x3af/0x500 [ 62.519852] do_syscall_64+0x3f/0x90 [ 62.520338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.521007] [ 62.521230] The buggy address belongs to the object at ffff88800dcbd0e8 [ 62.521230] which belongs to the cache vm_area_struct of size 168 [ 62.522782] The buggy address is located 88 bytes inside of [ 62.522782] freed 168-byte region [ffff88800dcbd0e8, ffff88800dcbd190) [ 62.524249] [ 62.524475] The buggy address belongs to the physical page: [ 62.525167] page:000000002d6d04a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcbd [ 62.526302] memcg:ffff88800f6c6601 [ 62.526750] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 62.527481] page_type: 0xffffffff() [ 62.527948] raw: 0100000000000200 ffff88800879fc80 ffffea000037f800 dead000000000005 [ 62.528906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6c6601 [ 62.529850] page dumped because: kasan: bad access detected [ 62.530546] [ 62.530784] Memory state around the buggy address: [ 62.531362] ffff88800dcbd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.532211] ffff88800dcbd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 62.533057] >ffff88800dcbd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.533900] ^ [ 62.534533] ffff88800dcbd180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 62.535387] ffff88800dcbd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 62.536227] ================================================================== [ 62.537167] Disabling lock debugging due to kernel taint [ 65.142117] BUG: Bad rss-counter state mm:000000004422c75c type:MM_FILEPAGES val:33 [ 65.143352] BUG: Bad rss-counter state mm:000000004422c75c type:MM_ANONPAGES val:22 [ 65.613217] BUG: Bad rss-counter state mm:000000006867a5e2 type:MM_FILEPAGES val:33 [ 65.614625] BUG: Bad rss-counter state mm:000000006867a5e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15991' (ECDSA) to the list of known hosts. 2023/06/19 16:21:42 fuzzer started 2023/06/19 16:21:42 dialing manager at localhost:44161 2023/06/19 16:21:42 checking machine... 2023/06/19 16:21:42 checking revisions... [ 66.233696] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:21:42 testing simple program... [ 66.283148] cgroup: Unknown subsys name 'net' [ 66.322717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00005653464d2000 CR3=000000000f79e000 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=2032343a31323a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a31323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000087dff82 RBX=00000000ef1fee11 RCX=ffff88806cf09be8 RDX=0000000000000007 RSI=0000000000000008 RDI=000000004b3fccad RBP=ffffffff813782a8 RSP=ffff88806cf09b68 R8 =00000000d12d3bac R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270ebf RFL=00000286 [--S--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 00007f2e41acc900 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=00007f2e420840b0 CR3=0000000009660000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000