syzkaller login: [ 206.303155] BUG: Bad rss-counter state mm:00000000d51c357e type:MM_FILEPAGES val:33 [ 206.304165] BUG: Bad rss-counter state mm:00000000d51c357e type:MM_ANONPAGES val:22 [ 206.468799] ================================================================== [ 206.469738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 206.470679] Read of size 8 at addr ffff88801452dd08 by task sshd/220 [ 206.471457] [ 206.471740] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 206.472793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 206.473788] Call Trace: [ 206.474130] [ 206.474414] dump_stack_lvl+0x91/0xf0 [ 206.474905] print_report+0xcc/0x620 [ 206.475381] ? __virt_addr_valid+0x102/0x340 [ 206.475929] ? vma_interval_tree_remove+0xc75/0xec0 [ 206.476545] ? vma_interval_tree_remove+0xc75/0xec0 [ 206.477154] kasan_report+0xbe/0xf0 [ 206.477666] ? vma_interval_tree_remove+0xc75/0xec0 [ 206.478295] vma_interval_tree_remove+0xc75/0xec0 [ 206.478891] vma_prepare+0xc54/0x11a0 [ 206.479371] __split_vma+0x5af/0x950 [ 206.479843] ? __pfx___split_vma+0x10/0x10 [ 206.480372] ? find_held_lock+0x2c/0x110 [ 206.480885] do_vmi_align_munmap+0x2ba/0x11f0 [ 206.481449] ? lock_is_held_type+0x9f/0x120 [ 206.481979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 206.482600] ? mtree_range_walk+0x632/0x900 [ 206.483142] ? mas_walk+0x5c7/0x7c0 [ 206.483624] do_vmi_munmap+0x1f1/0x2b0 [ 206.484114] mmap_region+0x1f9/0x2660 [ 206.484602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 206.485114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 206.485830] ? __pfx_lock_acquire+0x10/0x10 [ 206.486367] ? __pfx_mmap_region+0x10/0x10 [ 206.486904] ? security_mmap_addr+0x7d/0xa0 [ 206.487433] ? get_unmapped_area+0x1f5/0x3f0 [ 206.487976] do_mmap+0x854/0xf00 [ 206.488413] vm_mmap_pgoff+0x1a6/0x3a0 [ 206.488912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 206.489494] ksys_mmap_pgoff+0x3af/0x500 [ 206.490000] do_syscall_64+0x3f/0x90 [ 206.490479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 206.491130] RIP: 0033:0x7fa66a0dfd82 [ 206.491594] 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 [ 206.493737] RSP: 002b:00007fff3d6491f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 206.494629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa66a0dfd82 [ 206.495481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa669519000 [ 206.496323] RBP: 00007fa669519000 R08: 0000000000000009 R09: 0000000000001000 [ 206.497177] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e53c30f70 [ 206.498036] R13: 00007fff3d649210 R14: 00007fff3d649240 R15: 00007fff3d6495a0 [ 206.498890] [ 206.499180] [ 206.499397] Allocated by task 213: [ 206.499820] kasan_save_stack+0x22/0x50 [ 206.500332] kasan_set_track+0x25/0x30 [ 206.500827] __kasan_slab_alloc+0x59/0x70 [ 206.501352] kmem_cache_alloc+0x16b/0x370 [ 206.501878] vm_area_dup+0x20/0x160 [ 206.502335] __split_vma+0x170/0x950 [ 206.502814] split_vma+0xc6/0x110 [ 206.503259] mprotect_fixup+0x8d2/0xb30 [ 206.503758] do_mprotect_pkey+0x87e/0xd40 [ 206.504279] __x64_sys_mprotect+0x78/0xc0 [ 206.504805] do_syscall_64+0x3f/0x90 [ 206.505281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 206.505938] [ 206.506154] Freed by task 202: [ 206.506546] kasan_save_stack+0x22/0x50 [ 206.507060] kasan_set_track+0x25/0x30 [ 206.507556] kasan_save_free_info+0x2b/0x50 [ 206.508100] __kasan_slab_free+0x10a/0x190 [ 206.508638] kmem_cache_free+0x10d/0x4d0 [ 206.509153] rcu_core+0x8c8/0x2860 [ 206.509612] __do_softirq+0x1b7/0x7d4 [ 206.510086] [ 206.510305] Last potentially related work creation: [ 206.510889] kasan_save_stack+0x22/0x50 [ 206.511399] __kasan_record_aux_stack+0x8e/0xa0 [ 206.511973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 206.512617] remove_vma+0x139/0x170 [ 206.513074] do_vmi_align_munmap+0xd4a/0x11f0 [ 206.513659] do_vmi_munmap+0x1f1/0x2b0 [ 206.514141] __vm_munmap+0x138/0x3a0 [ 206.514607] __x64_sys_munmap+0x59/0x80 [ 206.515107] do_syscall_64+0x3f/0x90 [ 206.515575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 206.516220] [ 206.516436] The buggy address belongs to the object at ffff88801452dcb0 [ 206.516436] which belongs to the cache vm_area_struct of size 168 [ 206.517914] The buggy address is located 88 bytes inside of [ 206.517914] freed 168-byte region [ffff88801452dcb0, ffff88801452dd58) [ 206.519317] [ 206.519535] The buggy address belongs to the physical page: [ 206.520198] page:00000000ddaf1eb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1452d [ 206.521297] memcg:ffff88801688bf01 [ 206.521739] flags: 0x100000000000200(slab|node=0|zone=1) [ 206.522383] page_type: 0xffffffff() [ 206.522833] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 206.523758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801688bf01 [ 206.524664] page dumped because: kasan: bad access detected [ 206.525322] [ 206.525551] Memory state around the buggy address: [ 206.526130] ffff88801452dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 206.526986] ffff88801452dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 206.527863] >ffff88801452dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 206.528726] ^ [ 206.529172] ffff88801452dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 206.530041] ffff88801452de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 206.530901] ================================================================== [ 206.531895] Disabling lock debugging due to kernel taint [ 208.512664] BUG: Bad rss-counter state mm:0000000030b59b1f type:MM_FILEPAGES val:33 [ 208.513963] BUG: Bad rss-counter state mm:0000000030b59b1f type:MM_ANONPAGES val:22 [ 209.076401] BUG: Bad rss-counter state mm:0000000047d95ba1 type:MM_FILEPAGES val:33 [ 209.077774] BUG: Bad rss-counter state mm:0000000047d95ba1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44132' (ECDSA) to the list of known hosts. 2023/06/20 07:29:28 fuzzer started 2023/06/20 07:29:28 dialing manager at localhost:44161 2023/06/20 07:29:28 checking machine... 2023/06/20 07:29:28 checking revisions... [ 209.732567] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:29:28 testing simple program... [ 209.775686] cgroup: Unknown subsys name 'net' [ 209.812983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:26:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002ca9007 RSI=ffffffff848ff060 RDI=ffff88801654803a RBP=ffff888016548018 RSP=ffff888019607b58 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000000 R14=ffffffff87b67200 R15=ffff888016548000 RIP=ffffffff812db421 RFL=00000212 [----A--] 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 00007f8c44553900 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=00007f8c44b0a618 CR3=000000000c632000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888008e57b50 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000128 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff110011caf6b RIP=ffffffff845308c8 RFL=00000002 [-------] 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=00007f59b62f9270 CR3=000000000c934000 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=2038323a39323a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000