syzkaller login: [ 26.445994] BUG: Bad rss-counter state mm:000000006a288492 type:MM_FILEPAGES val:33 [ 26.447440] BUG: Bad rss-counter state mm:000000006a288492 type:MM_ANONPAGES val:22 [ 26.607769] ================================================================== [ 26.608878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.609875] Read of size 8 at addr ffff88800f158d08 by task sshd/219 [ 26.610723] [ 26.610942] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.611788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.612747] Call Trace: [ 26.613074] [ 26.613355] dump_stack_lvl+0x91/0xf0 [ 26.613839] print_report+0xcc/0x620 [ 26.614327] ? __virt_addr_valid+0x102/0x340 [ 26.614886] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.615493] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.616104] kasan_report+0xbe/0xf0 [ 26.616579] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.617201] vma_interval_tree_remove+0xc75/0xec0 [ 26.617796] vma_prepare+0xc54/0x11a0 [ 26.618274] __split_vma+0x5af/0x950 [ 26.618738] ? __pfx___split_vma+0x10/0x10 [ 26.619257] ? find_held_lock+0x2c/0x110 [ 26.619780] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.620334] ? lock_is_held_type+0x9f/0x120 [ 26.620899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.621502] ? mtree_range_walk+0x632/0x900 [ 26.622055] ? mas_walk+0x5c7/0x7c0 [ 26.622556] do_vmi_munmap+0x1f1/0x2b0 [ 26.623048] mmap_region+0x1f9/0x2660 [ 26.623521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.624026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.624723] ? __pfx_lock_acquire+0x10/0x10 [ 26.625255] ? __pfx_mmap_region+0x10/0x10 [ 26.625776] ? security_mmap_addr+0x7d/0xa0 [ 26.626294] ? get_unmapped_area+0x1f5/0x3f0 [ 26.626832] do_mmap+0x854/0xf00 [ 26.627262] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.627746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.628299] ksys_mmap_pgoff+0x3af/0x500 [ 26.628797] do_syscall_64+0x3f/0x90 [ 26.629317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.629957] RIP: 0033:0x7fe29ba63d82 [ 26.630402] 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 [ 26.632489] RSP: 002b:00007fffd90e23e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.633450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe29ba63d82 [ 26.634300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe29ae9d000 [ 26.635137] RBP: 00007fe29ae9d000 R08: 0000000000000009 R09: 0000000000001000 [ 26.635977] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1fd41ad90 [ 26.636825] R13: 00007fffd90e2400 R14: 00007fffd90e2430 R15: 00007fffd90e2790 [ 26.637698] [ 26.637987] [ 26.638196] Allocated by task 212: [ 26.638621] kasan_save_stack+0x22/0x50 [ 26.639117] kasan_set_track+0x25/0x30 [ 26.639610] __kasan_slab_alloc+0x59/0x70 [ 26.640130] kmem_cache_alloc+0x16b/0x370 [ 26.640645] vm_area_dup+0x20/0x160 [ 26.641107] __split_vma+0x170/0x950 [ 26.641574] split_vma+0xc6/0x110 [ 26.642009] mprotect_fixup+0x8d2/0xb30 [ 26.642508] do_mprotect_pkey+0x87e/0xd40 [ 26.643030] __x64_sys_mprotect+0x78/0xc0 [ 26.643544] do_syscall_64+0x3f/0x90 [ 26.644020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.644661] [ 26.644883] Freed by task 19: [ 26.645266] kasan_save_stack+0x22/0x50 [ 26.645769] kasan_set_track+0x25/0x30 [ 26.646258] kasan_save_free_info+0x2b/0x50 [ 26.646788] __kasan_slab_free+0x10a/0x190 [ 26.647313] kmem_cache_free+0x10d/0x4d0 [ 26.647815] rcu_core+0x8c8/0x2860 [ 26.648253] __do_softirq+0x1b7/0x7d4 [ 26.648726] [ 26.648958] Last potentially related work creation: [ 26.649543] kasan_save_stack+0x22/0x50 [ 26.650044] __kasan_record_aux_stack+0x8e/0xa0 [ 26.650607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.651245] remove_vma+0x139/0x170 [ 26.651691] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.652246] do_vmi_munmap+0x1f1/0x2b0 [ 26.652732] __vm_munmap+0x138/0x3a0 [ 26.653210] __x64_sys_munmap+0x59/0x80 [ 26.653704] do_syscall_64+0x3f/0x90 [ 26.654173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.654806] [ 26.655023] Second to last potentially related work creation: [ 26.655703] kasan_save_stack+0x22/0x50 [ 26.656211] __kasan_record_aux_stack+0x8e/0xa0 [ 26.656780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.657436] remove_vma+0x139/0x170 [ 26.657889] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.658444] do_vmi_munmap+0x1f1/0x2b0 [ 26.658925] mmap_region+0x1f9/0x2660 [ 26.659400] do_mmap+0x854/0xf00 [ 26.659824] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.660310] ksys_mmap_pgoff+0x3af/0x500 [ 26.660807] do_syscall_64+0x3f/0x90 [ 26.661289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.661922] [ 26.662138] The buggy address belongs to the object at ffff88800f158cb0 [ 26.662138] which belongs to the cache vm_area_struct of size 168 [ 26.663592] The buggy address is located 88 bytes inside of [ 26.663592] freed 168-byte region [ffff88800f158cb0, ffff88800f158d58) [ 26.664989] [ 26.665203] The buggy address belongs to the physical page: [ 26.665854] page:00000000bf41e141 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf158 [ 26.666927] memcg:ffff88800e82b201 [ 26.667346] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.668040] page_type: 0xffffffff() [ 26.668486] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.669414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e82b201 [ 26.670308] page dumped because: kasan: bad access detected [ 26.670964] [ 26.671177] Memory state around the buggy address: [ 26.671752] ffff88800f158c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.672600] ffff88800f158c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.673450] >ffff88800f158d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.674352] ^ [ 26.674813] ffff88800f158d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.675712] ffff88800f158e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 26.676602] ================================================================== [ 26.677620] Disabling lock debugging due to kernel taint [ 28.519590] BUG: Bad rss-counter state mm:00000000cb16d551 type:MM_FILEPAGES val:33 [ 28.520576] BUG: Bad rss-counter state mm:00000000cb16d551 type:MM_ANONPAGES val:22 [ 28.854389] BUG: Bad rss-counter state mm:0000000009c2c91a type:MM_FILEPAGES val:33 [ 28.855363] BUG: Bad rss-counter state mm:0000000009c2c91a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41734' (ECDSA) to the list of known hosts. 2023/06/19 13:02:47 fuzzer started 2023/06/19 13:02:48 dialing manager at localhost:44161 2023/06/19 13:02:48 checking machine... 2023/06/19 13:02:48 checking revisions... [ 29.552625] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:02:48 testing simple program... [ 29.614152] cgroup: Unknown subsys name 'net' 2023/06/19 13:02:48 Manager.Check call failed: machine check failed: host setup failed: failed to run ["/syz-executor" "setup" "leak" "fault" "binfmt_misc" "usb" "802154"]: signal: broken pipe [ 29.665512] BUG: Bad rss-counter state mm:00000000c90a6ccc type:MM_FILEPAGES val:33 [ 29.666488] BUG: Bad rss-counter state mm:00000000c90a6ccc type:MM_ANONPAGES val:22 VM DIAGNOSIS: 13:02:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=1ffff11002d35f1b RSI=0000000000000001 RDI=ffff8880169af8d8 RBP=ffff8880169af8e0 RSP=ffff8880169af818 R8 =ffffffff86136d80 R9 =ffff8880169af8c8 R10=0000000000038001 R11=0000000000020c48 R12=ffff8880169af8e8 R13=ffff8880169af8d0 R14=0000000000000004 R15=ffff8880169af888 RIP=ffffffff81131720 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 00007ff1673cf900 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=00007ffca95cb000 CR3=000000000e29a000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007ffdf1a61768 CR3=0000000016908000 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=2037343a32303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000