syzkaller login: [ 30.645648] BUG: Bad rss-counter state mm:00000000abce1565 type:MM_FILEPAGES val:33 [ 30.646862] BUG: Bad rss-counter state mm:00000000abce1565 type:MM_ANONPAGES val:22 [ 30.688768] ================================================================== [ 30.689745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.690722] Read of size 8 at addr ffff88800efaac20 by task sshd/220 [ 30.691668] [ 30.691908] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.692752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.694243] Call Trace: [ 30.694710] <TASK> [ 30.695121] dump_stack_lvl+0x91/0xf0 [ 30.695865] print_report+0xcc/0x620 [ 30.696618] ? __virt_addr_valid+0x102/0x340 [ 30.697531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.698510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699468] kasan_report+0xbe/0xf0 [ 30.700057] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.700815] vma_interval_tree_remove+0xc75/0xec0 [ 30.701553] vma_prepare+0xc54/0x11a0 [ 30.702131] __split_vma+0x5af/0x950 [ 30.702692] ? __pfx___split_vma+0x10/0x10 [ 30.703328] ? find_held_lock+0x2c/0x110 [ 30.703974] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.704660] ? lock_is_held_type+0x9f/0x120 [ 30.705323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.706046] ? mtree_range_walk+0x632/0x900 [ 30.706716] ? mas_walk+0x5c7/0x7c0 [ 30.707266] do_vmi_munmap+0x1f1/0x2b0 [ 30.707753] mmap_region+0x1f9/0x2660 [ 30.708231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.708719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.709392] ? __pfx_lock_acquire+0x10/0x10 [ 30.709893] ? __pfx_mmap_region+0x10/0x10 [ 30.710392] ? security_mmap_addr+0x7d/0xa0 [ 30.710902] ? get_unmapped_area+0x1f5/0x3f0 [ 30.711423] do_mmap+0x854/0xf00 [ 30.711869] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.712337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.712877] ksys_mmap_pgoff+0x3af/0x500 [ 30.713377] do_syscall_64+0x3f/0x90 [ 30.713854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714485] RIP: 0033:0x7fce35c9ed82 [ 30.714930] 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 [ 30.717056] RSP: 002b:00007ffe4d0705a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.717961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce35c9ed82 [ 30.718793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce350d8000 [ 30.719635] RBP: 00007fce350d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.720462] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573107a9ec0 [ 30.721305] R13: 00007ffe4d0705c0 R14: 00007ffe4d0705f0 R15: 00007ffe4d070950 [ 30.722160] </TASK> [ 30.722444] [ 30.722656] Allocated by task 213: [ 30.723087] kasan_save_stack+0x22/0x50 [ 30.723596] kasan_set_track+0x25/0x30 [ 30.724078] __kasan_slab_alloc+0x59/0x70 [ 30.724592] kmem_cache_alloc+0x16b/0x370 [ 30.725106] vm_area_dup+0x20/0x160 [ 30.725549] __split_vma+0x170/0x950 [ 30.726003] split_vma+0xc6/0x110 [ 30.726433] mprotect_fixup+0x8d2/0xb30 [ 30.726929] do_mprotect_pkey+0x87e/0xd40 [ 30.727433] __x64_sys_mprotect+0x78/0xc0 [ 30.728040] do_syscall_64+0x3f/0x90 [ 30.728508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729166] [ 30.729379] Freed by task 204: [ 30.729761] kasan_save_stack+0x22/0x50 [ 30.730253] kasan_set_track+0x25/0x30 [ 30.730743] kasan_save_free_info+0x2b/0x50 [ 30.731259] __kasan_slab_free+0x10a/0x190 [ 30.731781] kmem_cache_free+0x10d/0x4d0 [ 30.732315] rcu_core+0x8c8/0x2860 [ 30.732745] __do_softirq+0x1b7/0x7d4 [ 30.733197] [ 30.733405] Last potentially related work creation: [ 30.733953] kasan_save_stack+0x22/0x50 [ 30.734438] __kasan_record_aux_stack+0x8e/0xa0 [ 30.735010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.735638] remove_vma+0x139/0x170 [ 30.736083] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.736620] do_vmi_munmap+0x1f1/0x2b0 [ 30.737103] __vm_munmap+0x138/0x3a0 [ 30.737557] __x64_sys_munmap+0x59/0x80 [ 30.738048] do_syscall_64+0x3f/0x90 [ 30.738513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739144] [ 30.739355] The buggy address belongs to the object at ffff88800efaabc8 [ 30.739355] which belongs to the cache vm_area_struct of size 168 [ 30.740801] The buggy address is located 88 bytes inside of [ 30.740801] freed 168-byte region [ffff88800efaabc8, ffff88800efaac70) [ 30.742189] [ 30.742399] The buggy address belongs to the physical page: [ 30.743050] page:00000000ae0fd55c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefaa [ 30.744108] memcg:ffff88800de69b01 [ 30.744522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.745200] page_type: 0xffffffff() [ 30.745624] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.746484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de69b01 [ 30.747338] page dumped because: kasan: bad access detected [ 30.747970] [ 30.748175] Memory state around the buggy address: [ 30.748719] ffff88800efaab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.749519] ffff88800efaab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.750320] >ffff88800efaac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.751120] ^ [ 30.751634] ffff88800efaac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.752442] ffff88800efaad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.753278] ================================================================== [ 30.754185] Disabling lock debugging due to kernel taint [ 33.004949] BUG: Bad rss-counter state mm:000000002c2dbb76 type:MM_FILEPAGES val:33 [ 33.005962] BUG: Bad rss-counter state mm:000000002c2dbb76 type:MM_ANONPAGES val:22 [ 33.490140] BUG: Bad rss-counter state mm:000000009ab7c966 type:MM_FILEPAGES val:33 [ 33.491131] BUG: Bad rss-counter state mm:000000009ab7c966 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42515' (ECDSA) to the list of known hosts. 2023/06/20 22:59:21 fuzzer started 2023/06/20 22:59:21 dialing manager at localhost:36067 2023/06/20 22:59:21 checking machine... 2023/06/20 22:59:21 checking revisions... [ 34.173801] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:59:21 testing simple program... [ 34.225138] cgroup: Unknown subsys name 'net' [ 34.263121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:59:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdd4e6ace10 CR3=000000000f9a8000 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=2031323a39353a3232203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a343734323520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f1f8540 RCX=0000000000000000 RDX=ffff888019ca1b40 RSI=ffffffff8199c056 RDI=ffff888009a33190 RBP=ffff88800deb12b0 RSP=ffff888018d37938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff888009a33000 R13=0000000000000001 R14=0000000000000000 R15=ffff888009a33140 RIP=ffffffff814c089b RFL=00000046 [---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 00007f6ea574b900 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=00007f6ea5d00650 CR3=000000001691a000 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