syzkaller login: [ 34.188657] BUG: Bad rss-counter state mm:00000000e485a909 type:MM_FILEPAGES val:33 [ 34.190248] BUG: Bad rss-counter state mm:00000000e485a909 type:MM_ANONPAGES val:22 [ 34.351175] ================================================================== [ 34.352266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.353584] Read of size 8 at addr ffff8880168b3140 by task sshd/221 [ 34.354404] [ 34.354620] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.355478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.356442] Call Trace: [ 34.356759] [ 34.357048] dump_stack_lvl+0x91/0xf0 [ 34.357527] print_report+0xcc/0x620 [ 34.358010] ? __virt_addr_valid+0x102/0x340 [ 34.358552] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.359158] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.359766] kasan_report+0xbe/0xf0 [ 34.360237] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.360855] vma_interval_tree_remove+0xc75/0xec0 [ 34.361468] vma_prepare+0xc54/0x11a0 [ 34.361941] __split_vma+0x5af/0x950 [ 34.362416] ? __pfx___split_vma+0x10/0x10 [ 34.362938] ? find_held_lock+0x2c/0x110 [ 34.363448] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.364008] ? lock_is_held_type+0x9f/0x120 [ 34.364540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.365164] ? mtree_range_walk+0x632/0x900 [ 34.365709] ? mas_walk+0x5c7/0x7c0 [ 34.366188] do_vmi_munmap+0x1f1/0x2b0 [ 34.366675] mmap_region+0x1f9/0x2660 [ 34.367156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.367663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.368377] ? __pfx_lock_acquire+0x10/0x10 [ 34.368907] ? __pfx_mmap_region+0x10/0x10 [ 34.369442] ? security_mmap_addr+0x7d/0xa0 [ 34.369977] ? get_unmapped_area+0x1f5/0x3f0 [ 34.370522] do_mmap+0x854/0xf00 [ 34.370956] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.371446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.372006] ksys_mmap_pgoff+0x3af/0x500 [ 34.372510] do_syscall_64+0x3f/0x90 [ 34.372989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.373631] RIP: 0033:0x7f6796bd5d82 [ 34.374094] 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 [ 34.376207] RSP: 002b:00007ffecf093ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.377124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6796bd5d82 [ 34.377964] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f679600f000 [ 34.378808] RBP: 00007f679600f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.379645] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e15742f70 [ 34.380484] R13: 00007ffecf093b00 R14: 00007ffecf093b30 R15: 00007ffecf093e90 [ 34.381344] [ 34.381636] [ 34.381849] Allocated by task 214: [ 34.382278] kasan_save_stack+0x22/0x50 [ 34.382784] kasan_set_track+0x25/0x30 [ 34.383285] __kasan_slab_alloc+0x59/0x70 [ 34.383805] kmem_cache_alloc+0x16b/0x370 [ 34.384326] vm_area_dup+0x20/0x160 [ 34.384779] __split_vma+0x170/0x950 [ 34.385258] split_vma+0xc6/0x110 [ 34.385693] mprotect_fixup+0x8d2/0xb30 [ 34.386188] do_mprotect_pkey+0x87e/0xd40 [ 34.386707] __x64_sys_mprotect+0x78/0xc0 [ 34.387230] do_syscall_64+0x3f/0x90 [ 34.387695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.388331] [ 34.388543] Freed by task 19: [ 34.388927] kasan_save_stack+0x22/0x50 [ 34.389440] kasan_set_track+0x25/0x30 [ 34.389934] kasan_save_free_info+0x2b/0x50 [ 34.390473] __kasan_slab_free+0x10a/0x190 [ 34.390998] kmem_cache_free+0x10d/0x4d0 [ 34.391504] rcu_core+0x8c8/0x2860 [ 34.391949] __do_softirq+0x1b7/0x7d4 [ 34.392423] [ 34.392636] Last potentially related work creation: [ 34.393270] kasan_save_stack+0x22/0x50 [ 34.393768] __kasan_record_aux_stack+0x8e/0xa0 [ 34.394341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.394976] remove_vma+0x139/0x170 [ 34.395422] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.395985] do_vmi_munmap+0x1f1/0x2b0 [ 34.396468] __vm_munmap+0x138/0x3a0 [ 34.396926] __x64_sys_munmap+0x59/0x80 [ 34.397447] do_syscall_64+0x3f/0x90 [ 34.397918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.398547] [ 34.398760] The buggy address belongs to the object at ffff8880168b30e8 [ 34.398760] which belongs to the cache vm_area_struct of size 168 [ 34.400207] The buggy address is located 88 bytes inside of [ 34.400207] freed 168-byte region [ffff8880168b30e8, ffff8880168b3190) [ 34.401597] [ 34.401810] The buggy address belongs to the physical page: [ 34.402465] page:000000003a84cc86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b3 [ 34.403557] memcg:ffff88801a1c6f01 [ 34.403985] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.404617] page_type: 0xffffffff() [ 34.405074] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.405978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1c6f01 [ 34.406880] page dumped because: kasan: bad access detected [ 34.407537] [ 34.407750] Memory state around the buggy address: [ 34.408321] ffff8880168b3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.409180] ffff8880168b3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.410022] >ffff8880168b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.410872] ^ [ 34.411511] ffff8880168b3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.412373] ffff8880168b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.413221] ================================================================== [ 34.414113] Disabling lock debugging due to kernel taint [ 36.705884] BUG: Bad rss-counter state mm:0000000080daf6ab type:MM_FILEPAGES val:33 [ 36.707126] BUG: Bad rss-counter state mm:0000000080daf6ab type:MM_ANONPAGES val:22 [ 37.235622] BUG: Bad rss-counter state mm:000000000a52d720 type:MM_FILEPAGES val:33 [ 37.236851] BUG: Bad rss-counter state mm:000000000a52d720 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8051' (ECDSA) to the list of known hosts. 2023/06/19 21:30:02 fuzzer started 2023/06/19 21:30:03 dialing manager at localhost:44161 2023/06/19 21:30:03 checking machine... 2023/06/19 21:30:03 checking revisions... [ 37.872383] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:30:03 testing simple program... [ 37.922321] cgroup: Unknown subsys name 'net' [ 37.966392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c13a2 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806ce09d00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff812d923f RFL=00000047 [---Z-PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd936daf900 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=00007fd936245090 CR3=0000000013620000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9c4b32d44306765d00000000000ae988 XMM05=dad48727a1082b7200000000001351a0 XMM06=2d6b60a1743063170000000000133f40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00005612e85eb774 RCX=0000000000000000 RDX=000000000000000a RSI=00007f78b7d20258 RDI=00007ffd9b101c30 RBP=00007ffd9b101c30 RSP=00007ffd9b101b00 R8 =0000000000000002 R9 =0000000000000002 R10=0000000000000000 R11=00007f78b7d013c0 R12=00005612e86003f0 R13=00007ffd9b101d70 R14=00005612e8603480 R15=00007ffd9b101d70 RIP=00007f78b7be5e77 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f78b779b900 00000000 00000000 GS =0000 0000000000000000 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=00007f78b7d52618 CR3=000000000c690000 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=563412feff00545000000000000080fe 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