syzkaller login: [ 41.799692] BUG: Bad rss-counter state mm:000000001ffdd310 type:MM_FILEPAGES val:33 [ 41.800904] BUG: Bad rss-counter state mm:000000001ffdd310 type:MM_ANONPAGES val:22 [ 41.942068] ================================================================== [ 41.943142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.944392] Read of size 8 at addr ffff88800ec4b880 by task sshd/218 [ 41.945183] [ 41.945360] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.946055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.946856] Call Trace: [ 41.947113] [ 41.947344] dump_stack_lvl+0x91/0xf0 [ 41.947742] print_report+0xcc/0x620 [ 41.948148] ? __virt_addr_valid+0x102/0x340 [ 41.948597] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.949099] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.949598] kasan_report+0xbe/0xf0 [ 41.949988] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.950498] vma_interval_tree_remove+0xc75/0xec0 [ 41.950984] vma_prepare+0xc54/0x11a0 [ 41.951370] __split_vma+0x5af/0x950 [ 41.951750] ? __pfx___split_vma+0x10/0x10 [ 41.952183] ? find_held_lock+0x2c/0x110 [ 41.952603] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.953063] ? lock_is_held_type+0x9f/0x120 [ 41.953497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.953989] ? mtree_range_walk+0x632/0x900 [ 41.954434] ? mas_walk+0x5c7/0x7c0 [ 41.954816] do_vmi_munmap+0x1f1/0x2b0 [ 41.955213] mmap_region+0x1f9/0x2660 [ 41.955602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.956032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.956611] ? __pfx_lock_acquire+0x10/0x10 [ 41.957040] ? __pfx_mmap_region+0x10/0x10 [ 41.957463] ? security_mmap_addr+0x7d/0xa0 [ 41.957893] ? get_unmapped_area+0x1f5/0x3f0 [ 41.958336] do_mmap+0x854/0xf00 [ 41.958688] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.959087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.959541] ksys_mmap_pgoff+0x3af/0x500 [ 41.959959] do_syscall_64+0x3f/0x90 [ 41.960349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.960875] RIP: 0033:0x7fe139b95d82 [ 41.961241] 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 [ 41.962959] RSP: 002b:00007ffd8220f8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.963691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe139b95d82 [ 41.964392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe138fcf000 [ 41.965075] RBP: 00007fe138fcf000 R08: 0000000000000009 R09: 0000000000001000 [ 41.965760] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d208355ec0 [ 41.966437] R13: 00007ffd8220f900 R14: 00007ffd8220f930 R15: 00007ffd8220fc90 [ 41.967134] [ 41.967368] [ 41.967543] Allocated by task 211: [ 41.967893] kasan_save_stack+0x22/0x50 [ 41.968313] kasan_set_track+0x25/0x30 [ 41.968712] __kasan_slab_alloc+0x59/0x70 [ 41.969138] kmem_cache_alloc+0x16b/0x370 [ 41.969558] vm_area_dup+0x20/0x160 [ 41.969924] __split_vma+0x170/0x950 [ 41.970301] split_vma+0xc6/0x110 [ 41.970653] mprotect_fixup+0x8d2/0xb30 [ 41.971063] do_mprotect_pkey+0x87e/0xd40 [ 41.971483] __x64_sys_mprotect+0x78/0xc0 [ 41.971906] do_syscall_64+0x3f/0x90 [ 41.972298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.972816] [ 41.972993] Freed by task 211: [ 41.973309] kasan_save_stack+0x22/0x50 [ 41.973720] kasan_set_track+0x25/0x30 [ 41.974119] kasan_save_free_info+0x2b/0x50 [ 41.974551] __kasan_slab_free+0x10a/0x190 [ 41.974984] kmem_cache_free+0x10d/0x4d0 [ 41.975392] rcu_core+0x8c8/0x2860 [ 41.975754] __do_softirq+0x1b7/0x7d4 [ 41.976162] [ 41.976335] Last potentially related work creation: [ 41.976807] kasan_save_stack+0x22/0x50 [ 41.977210] __kasan_record_aux_stack+0x8e/0xa0 [ 41.977670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.978195] remove_vma+0x139/0x170 [ 41.978557] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.979003] do_vmi_munmap+0x1f1/0x2b0 [ 41.979392] __vm_munmap+0x138/0x3a0 [ 41.979773] __x64_sys_munmap+0x59/0x80 [ 41.980184] do_syscall_64+0x3f/0x90 [ 41.980565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.981085] [ 41.981259] Second to last potentially related work creation: [ 41.981816] kasan_save_stack+0x22/0x50 [ 41.982227] __kasan_record_aux_stack+0x8e/0xa0 [ 41.982696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.983214] remove_vma+0x139/0x170 [ 41.983583] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.984045] do_vmi_munmap+0x1f1/0x2b0 [ 41.984440] move_vma.constprop.0+0x88a/0x1ba0 [ 41.984909] __do_sys_mremap+0xb78/0x1780 [ 41.985378] do_syscall_64+0x3f/0x90 [ 41.985755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.986271] [ 41.986446] The buggy address belongs to the object at ffff88800ec4b828 [ 41.986446] which belongs to the cache vm_area_struct of size 168 [ 41.987635] The buggy address is located 88 bytes inside of [ 41.987635] freed 168-byte region [ffff88800ec4b828, ffff88800ec4b8d0) [ 41.988784] [ 41.988957] The buggy address belongs to the physical page: [ 41.989486] page:00000000e13b280b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec4b [ 41.990366] memcg:ffff8880095ed101 [ 41.990710] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.991226] page_type: 0xffffffff() [ 41.991589] raw: 0100000000000200 ffff88800879fc80 ffffea00003b1900 dead000000000004 [ 41.992341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095ed101 [ 41.993076] page dumped because: kasan: bad access detected [ 41.993606] [ 41.993780] Memory state around the buggy address: [ 41.994246] ffff88800ec4b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.994944] ffff88800ec4b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.995637] >ffff88800ec4b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.996336] ^ [ 41.996671] ffff88800ec4b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.997366] ffff88800ec4b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 41.998045] ================================================================== [ 41.998838] Disabling lock debugging due to kernel taint [ 43.934795] BUG: Bad rss-counter state mm:000000009e6b64fc type:MM_FILEPAGES val:33 [ 43.935806] BUG: Bad rss-counter state mm:000000009e6b64fc type:MM_ANONPAGES val:22 [ 44.411450] BUG: Bad rss-counter state mm:00000000bbeda599 type:MM_FILEPAGES val:33 [ 44.412456] BUG: Bad rss-counter state mm:00000000bbeda599 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23517' (ECDSA) to the list of known hosts. 2023/06/19 18:35:06 fuzzer started 2023/06/19 18:35:07 dialing manager at localhost:44161 2023/06/19 18:35:07 checking machine... 2023/06/19 18:35:07 checking revisions... [ 45.214733] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:35:07 testing simple program... [ 45.260179] cgroup: Unknown subsys name 'net' [ 45.300772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000000d RCX=ffffffff814067eb RDX=0000000000000001 RSI=000000000000000d RDI=0000000000000005 RBP=ffffffff84899540 RSP=ffff888017ecfd70 R8 =0000000000000005 R9 =000000000000000d R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=000000000000000d R15=0000000000000000 RIP=ffffffff814c01d0 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 00007fb669c52700 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=00007f2ab810eea0 CR3=000000001464e000 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=2036303a35333a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35333a3831203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007fb26fa70618 CR3=000000000cc0a000 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=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