syzkaller login: [ 30.580027] sshd (213) used greatest stack depth: 24128 bytes left [ 30.581563] BUG: Bad rss-counter state mm:000000002edee515 type:MM_FILEPAGES val:33 [ 30.582899] BUG: Bad rss-counter state mm:000000002edee515 type:MM_ANONPAGES val:22 [ 30.741753] ================================================================== [ 30.742644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.743606] Read of size 8 at addr ffff88800d530ed8 by task sshd/220 [ 30.744371] [ 30.744679] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.745537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746505] Call Trace: [ 30.746857] [ 30.747144] dump_stack_lvl+0x91/0xf0 [ 30.747658] print_report+0xcc/0x620 [ 30.748142] ? __virt_addr_valid+0x102/0x340 [ 30.748696] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749933] kasan_report+0xbe/0xf0 [ 30.750405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751024] vma_interval_tree_remove+0xc75/0xec0 [ 30.751636] vma_prepare+0xc54/0x11a0 [ 30.752122] __split_vma+0x5af/0x950 [ 30.752592] ? __pfx___split_vma+0x10/0x10 [ 30.753130] ? find_held_lock+0x2c/0x110 [ 30.753654] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754228] ? lock_is_held_type+0x9f/0x120 [ 30.754763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755414] ? mtree_range_walk+0x632/0x900 [ 30.755987] ? mas_walk+0x5c7/0x7c0 [ 30.756474] do_vmi_munmap+0x1f1/0x2b0 [ 30.756988] mmap_region+0x1f9/0x2660 [ 30.757476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758740] ? __pfx_lock_acquire+0x10/0x10 [ 30.759318] ? __pfx_mmap_region+0x10/0x10 [ 30.759863] ? security_mmap_addr+0x7d/0xa0 [ 30.760416] ? get_unmapped_area+0x1f5/0x3f0 [ 30.760983] do_mmap+0x854/0xf00 [ 30.761428] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.761938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762517] ksys_mmap_pgoff+0x3af/0x500 [ 30.763044] do_syscall_64+0x3f/0x90 [ 30.763553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764224] RIP: 0033:0x7f989d8aed82 [ 30.764695] 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 [ 30.766902] RSP: 002b:00007ffd56ec61d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f989d8aed82 [ 30.768734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f989cce8000 [ 30.769611] RBP: 00007f989cce8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556eb79a6ec0 [ 30.771380] R13: 00007ffd56ec61f0 R14: 00007ffd56ec6220 R15: 00007ffd56ec6580 [ 30.772271] [ 30.772574] [ 30.772789] Allocated by task 213: [ 30.773229] kasan_save_stack+0x22/0x50 [ 30.773756] kasan_set_track+0x25/0x30 [ 30.774261] __kasan_slab_alloc+0x59/0x70 [ 30.774800] kmem_cache_alloc+0x16b/0x370 [ 30.775351] vm_area_dup+0x20/0x160 [ 30.775832] __split_vma+0x170/0x950 [ 30.776313] split_vma+0xc6/0x110 [ 30.776771] mprotect_fixup+0x8d2/0xb30 [ 30.777294] do_mprotect_pkey+0x87e/0xd40 [ 30.777825] __x64_sys_mprotect+0x78/0xc0 [ 30.778355] do_syscall_64+0x3f/0x90 [ 30.778847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779525] [ 30.779739] Freed by task 213: [ 30.780142] kasan_save_stack+0x22/0x50 [ 30.780660] kasan_set_track+0x25/0x30 [ 30.781169] kasan_save_free_info+0x2b/0x50 [ 30.781727] __kasan_slab_free+0x10a/0x190 [ 30.782278] kmem_cache_free+0x10d/0x4d0 [ 30.782806] rcu_core+0x8c8/0x2860 [ 30.783266] __do_softirq+0x1b7/0x7d4 [ 30.783777] [ 30.784000] Last potentially related work creation: [ 30.784616] kasan_save_stack+0x22/0x50 [ 30.785135] __kasan_record_aux_stack+0x8e/0xa0 [ 30.785717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.786387] remove_vma+0x139/0x170 [ 30.786837] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.787402] do_vmi_munmap+0x1f1/0x2b0 [ 30.787889] __vm_munmap+0x138/0x3a0 [ 30.788354] __x64_sys_munmap+0x59/0x80 [ 30.788850] do_syscall_64+0x3f/0x90 [ 30.789317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789950] [ 30.790172] The buggy address belongs to the object at ffff88800d530e80 [ 30.790172] which belongs to the cache vm_area_struct of size 168 [ 30.791642] The buggy address is located 88 bytes inside of [ 30.791642] freed 168-byte region [ffff88800d530e80, ffff88800d530f28) [ 30.793040] [ 30.793255] The buggy address belongs to the physical page: [ 30.793911] page:00000000bc0a3ca7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd530 [ 30.794988] memcg:ffff88800d9b3801 [ 30.795414] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.796113] page_type: 0xffffffff() [ 30.796562] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.797474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9b3801 [ 30.798371] page dumped because: kasan: bad access detected [ 30.799031] [ 30.799246] Memory state around the buggy address: [ 30.799844] ffff88800d530d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.800698] ffff88800d530e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.801546] >ffff88800d530e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802393] ^ [ 30.803112] ffff88800d530f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.803984] ffff88800d530f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.804835] ================================================================== [ 30.805838] Disabling lock debugging due to kernel taint [ 32.876828] BUG: Bad rss-counter state mm:000000008c530f0e type:MM_FILEPAGES val:33 [ 32.878077] BUG: Bad rss-counter state mm:000000008c530f0e type:MM_ANONPAGES val:22 [ 33.328182] BUG: Bad rss-counter state mm:0000000018800aee type:MM_FILEPAGES val:33 [ 33.330629] BUG: Bad rss-counter state mm:0000000018800aee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61939' (ECDSA) to the list of known hosts. 2023/06/19 13:50:56 fuzzer started 2023/06/19 13:50:57 dialing manager at localhost:44161 2023/06/19 13:50:57 checking machine... 2023/06/19 13:50:57 checking revisions... [ 34.065076] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:50:57 testing simple program... [ 34.111732] cgroup: Unknown subsys name 'net' [ 34.164017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:50:56 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=ffff888008c58000 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=00007f73274da650 CR3=000000000caee000 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=2036353a30353a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b32b5 RBX=0000000000000001 RCX=ffffffff863b32b0 RDX=0000000000000000 RSI=1ffffffff0c76656 RDI=ffffffff85fa486c RBP=ffff88800d0279b8 RSP=ffff88800d0278f0 R8 =ffffffff863b32b0 R9 =ffff88800d0279a0 R10=0000000000038001 R11=000000000008ad26 R12=ffff88800d0279c0 R13=ffff88800d0279a8 R14=ffff88800d0279a1 R15=ffff88800d027960 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007f45a6f44900 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=00007f45a74fb618 CR3=0000000016402000 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