syzkaller login: [ 31.656714] BUG: Bad rss-counter state mm:000000007a06ad99 type:MM_FILEPAGES val:33 [ 31.658125] BUG: Bad rss-counter state mm:000000007a06ad99 type:MM_ANONPAGES val:22 [ 31.833878] ================================================================== [ 31.834742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.835636] Read of size 8 at addr ffff888015cb8140 by task sshd/222 [ 31.836426] [ 31.836634] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.837457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.838392] Call Trace: [ 31.838692] [ 31.838965] dump_stack_lvl+0x91/0xf0 [ 31.839428] print_report+0xcc/0x620 [ 31.839884] ? __virt_addr_valid+0x102/0x340 [ 31.840408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.841011] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.841592] kasan_report+0xbe/0xf0 [ 31.842045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.842630] vma_interval_tree_remove+0xc75/0xec0 [ 31.843191] vma_prepare+0xc54/0x11a0 [ 31.843640] __split_vma+0x5af/0x950 [ 31.844088] ? __pfx___split_vma+0x10/0x10 [ 31.844585] ? find_held_lock+0x2c/0x110 [ 31.845100] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.845633] ? lock_is_held_type+0x9f/0x120 [ 31.846147] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.846745] ? mtree_range_walk+0x632/0x900 [ 31.847289] ? mas_walk+0x5c7/0x7c0 [ 31.847753] do_vmi_munmap+0x1f1/0x2b0 [ 31.848229] mmap_region+0x1f9/0x2660 [ 31.848698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.849232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.849943] ? __pfx_lock_acquire+0x10/0x10 [ 31.850463] ? __pfx_mmap_region+0x10/0x10 [ 31.850983] ? security_mmap_addr+0x7d/0xa0 [ 31.851500] ? get_unmapped_area+0x1f5/0x3f0 [ 31.852045] do_mmap+0x854/0xf00 [ 31.852472] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.852961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.853534] ksys_mmap_pgoff+0x3af/0x500 [ 31.854034] do_syscall_64+0x3f/0x90 [ 31.854496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.855135] RIP: 0033:0x7f8252650d82 [ 31.855579] 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 [ 31.857698] RSP: 002b:00007ffca12b8dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.858590] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8252650d82 [ 31.859424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8251a8a000 [ 31.860263] RBP: 00007f8251a8a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.861088] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7dd509ec0 [ 31.861913] R13: 00007ffca12b8df0 R14: 00007ffca12b8e20 R15: 00007ffca12b9180 [ 31.862739] [ 31.863023] [ 31.863237] Allocated by task 215: [ 31.863648] kasan_save_stack+0x22/0x50 [ 31.864131] kasan_set_track+0x25/0x30 [ 31.864605] __kasan_slab_alloc+0x59/0x70 [ 31.865133] kmem_cache_alloc+0x16b/0x370 [ 31.865634] vm_area_dup+0x20/0x160 [ 31.866079] __split_vma+0x170/0x950 [ 31.866535] split_vma+0xc6/0x110 [ 31.866970] mprotect_fixup+0x8d2/0xb30 [ 31.867463] do_mprotect_pkey+0x87e/0xd40 [ 31.867977] __x64_sys_mprotect+0x78/0xc0 [ 31.868494] do_syscall_64+0x3f/0x90 [ 31.868960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869603] [ 31.869818] Freed by task 215: [ 31.870204] kasan_save_stack+0x22/0x50 [ 31.870695] kasan_set_track+0x25/0x30 [ 31.871170] kasan_save_free_info+0x2b/0x50 [ 31.871702] __kasan_slab_free+0x10a/0x190 [ 31.872214] kmem_cache_free+0x10d/0x4d0 [ 31.872697] rcu_core+0x8c8/0x2860 [ 31.873136] __do_softirq+0x1b7/0x7d4 [ 31.873605] [ 31.873820] Last potentially related work creation: [ 31.874394] kasan_save_stack+0x22/0x50 [ 31.874890] __kasan_record_aux_stack+0x8e/0xa0 [ 31.875461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.876089] remove_vma+0x139/0x170 [ 31.876527] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.877092] do_vmi_munmap+0x1f1/0x2b0 [ 31.877567] __vm_munmap+0x138/0x3a0 [ 31.878032] __x64_sys_munmap+0x59/0x80 [ 31.878522] do_syscall_64+0x3f/0x90 [ 31.878990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.879627] [ 31.879834] The buggy address belongs to the object at ffff888015cb80e8 [ 31.879834] which belongs to the cache vm_area_struct of size 168 [ 31.881278] The buggy address is located 88 bytes inside of [ 31.881278] freed 168-byte region [ffff888015cb80e8, ffff888015cb8190) [ 31.882668] [ 31.882884] The buggy address belongs to the physical page: [ 31.883531] page:0000000049b29785 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cb8 [ 31.884618] memcg:ffff88801995db01 [ 31.885040] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.885675] page_type: 0xffffffff() [ 31.886123] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.887033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801995db01 [ 31.887926] page dumped because: kasan: bad access detected [ 31.888580] [ 31.888792] Memory state around the buggy address: [ 31.889380] ffff888015cb8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.890227] ffff888015cb8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.891077] >ffff888015cb8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.891912] ^ [ 31.892542] ffff888015cb8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.893398] ffff888015cb8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.894223] ================================================================== [ 31.895257] Disabling lock debugging due to kernel taint [ 34.305151] BUG: Bad rss-counter state mm:000000000dbeca72 type:MM_FILEPAGES val:33 [ 34.306071] BUG: Bad rss-counter state mm:000000000dbeca72 type:MM_ANONPAGES val:22 [ 34.735212] BUG: Bad rss-counter state mm:00000000c733c634 type:MM_FILEPAGES val:33 [ 34.736453] BUG: Bad rss-counter state mm:00000000c733c634 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17786' (ECDSA) to the list of known hosts. 2023/06/19 13:43:36 fuzzer started 2023/06/19 13:43:36 dialing manager at localhost:44161 2023/06/19 13:43:36 checking machine... 2023/06/19 13:43:36 checking revisions... [ 35.376068] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:43:36 testing simple program... [ 35.412844] cgroup: Unknown subsys name 'net' [ 35.461819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800dfc51c0 RSI=ffffffff8162f7f3 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff8880181afb40 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=4920230a2e445342 R12=ffffea00005d1f00 R13=ffff8880181afc00 R14=ffff8880181afe00 R15=dffffc0000000000 RIP=ffffffff814c081b RFL=00000246 [---Z-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 00007fc2663b7900 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=00007ffc5145a000 CR3=000000000c9e0000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801934e758 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800dbbcab0 RSP=ffff88806cf09df0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000202 R13=ffff88800dbbcaf0 R14=ffffffff813782a8 R15=ffff88800da53c80 RIP=ffffffff8452fd1e RFL=00000082 [--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 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=00007fe655720680 CR3=0000000014674000 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=ef2201b6f1457ea8a84e7769f96e9603 XMM02=2c67c8bc2e329bc3000000000011fc08 XMM03=fb795ef6d65770560000000000124328 XMM04=8f2722f2c90406dd00000000000ae988 XMM05=42b368e30b80547800000000001343b8 XMM06=00c3ffa147b8d8570000000000133db0 XMM07=e042d86d42eb936e00000000001245a8 XMM08=3eaebeeee405d91e000000000011fc68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000