syzkaller login: [ 30.578470] BUG: Bad rss-counter state mm:0000000000b434ed type:MM_FILEPAGES val:33 [ 30.579894] BUG: Bad rss-counter state mm:0000000000b434ed type:MM_ANONPAGES val:22 [ 30.730190] ================================================================== [ 30.731289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.732489] Read of size 8 at addr ffff88801a9396b0 by task sshd/220 [ 30.733366] [ 30.733602] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.734533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.735590] Call Trace: [ 30.735930] [ 30.736233] dump_stack_lvl+0x91/0xf0 [ 30.736757] print_report+0xcc/0x620 [ 30.737278] ? __virt_addr_valid+0x102/0x340 [ 30.737882] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739213] kasan_report+0xbe/0xf0 [ 30.739733] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740425] vma_interval_tree_remove+0xc75/0xec0 [ 30.741099] vma_prepare+0xc54/0x11a0 [ 30.741630] __split_vma+0x5af/0x950 [ 30.742180] ? __pfx___split_vma+0x10/0x10 [ 30.742767] ? find_held_lock+0x2c/0x110 [ 30.743347] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.743979] ? lock_is_held_type+0x9f/0x120 [ 30.744578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.745256] ? mtree_range_walk+0x632/0x900 [ 30.745872] ? mas_walk+0x5c7/0x7c0 [ 30.746421] do_vmi_munmap+0x1f1/0x2b0 [ 30.746970] mmap_region+0x1f9/0x2660 [ 30.747509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.748870] ? __pfx_lock_acquire+0x10/0x10 [ 30.749463] ? __pfx_mmap_region+0x10/0x10 [ 30.750074] ? security_mmap_addr+0x7d/0xa0 [ 30.750664] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751280] do_mmap+0x854/0xf00 [ 30.751772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752956] ksys_mmap_pgoff+0x3af/0x500 [ 30.753520] do_syscall_64+0x3f/0x90 [ 30.754071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754789] RIP: 0033:0x7f85bd9f0d82 [ 30.755291] 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 [ 30.757674] RSP: 002b:00007ffd0b60bb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85bd9f0d82 [ 30.759652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85bce2a000 [ 30.760595] RBP: 00007f85bce2a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.761540] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e6d738ec0 [ 30.762510] R13: 00007ffd0b60bb20 R14: 00007ffd0b60bb50 R15: 00007ffd0b60beb0 [ 30.763464] [ 30.763790] [ 30.764033] Allocated by task 213: [ 30.764503] kasan_save_stack+0x22/0x50 [ 30.765062] kasan_set_track+0x25/0x30 [ 30.765620] __kasan_slab_alloc+0x59/0x70 [ 30.766216] kmem_cache_alloc+0x16b/0x370 [ 30.766786] vm_area_dup+0x20/0x160 [ 30.767290] __split_vma+0x170/0x950 [ 30.767810] split_vma+0xc6/0x110 [ 30.768301] mprotect_fixup+0x8d2/0xb30 [ 30.768857] do_mprotect_pkey+0x87e/0xd40 [ 30.769440] __x64_sys_mprotect+0x78/0xc0 [ 30.770033] do_syscall_64+0x3f/0x90 [ 30.770564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771278] [ 30.771518] Freed by task 213: [ 30.771959] kasan_save_stack+0x22/0x50 [ 30.772521] kasan_set_track+0x25/0x30 [ 30.773066] kasan_save_free_info+0x2b/0x50 [ 30.773658] __kasan_slab_free+0x10a/0x190 [ 30.774261] kmem_cache_free+0x10d/0x4d0 [ 30.774828] rcu_core+0x8c8/0x2860 [ 30.775320] __do_softirq+0x1b7/0x7d4 [ 30.775853] [ 30.776092] Last potentially related work creation: [ 30.776745] kasan_save_stack+0x22/0x50 [ 30.777307] __kasan_record_aux_stack+0x8e/0xa0 [ 30.777987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.778750] remove_vma+0x139/0x170 [ 30.779258] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779883] do_vmi_munmap+0x1f1/0x2b0 [ 30.780425] __vm_munmap+0x138/0x3a0 [ 30.780944] __x64_sys_munmap+0x59/0x80 [ 30.781494] do_syscall_64+0x3f/0x90 [ 30.782032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782749] [ 30.782989] The buggy address belongs to the object at ffff88801a939658 [ 30.782989] which belongs to the cache vm_area_struct of size 168 [ 30.784626] The buggy address is located 88 bytes inside of [ 30.784626] freed 168-byte region [ffff88801a939658, ffff88801a939700) [ 30.786193] [ 30.786435] The buggy address belongs to the physical page: [ 30.787176] page:000000008cc0a25a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a939 [ 30.788396] memcg:ffff88800ed5eb01 [ 30.788867] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789588] page_type: 0xffffffff() [ 30.790105] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.791127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed5eb01 [ 30.792143] page dumped because: kasan: bad access detected [ 30.792883] [ 30.793123] Memory state around the buggy address: [ 30.793767] ffff88801a939580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.794725] ffff88801a939600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.795682] >ffff88801a939680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.796632] ^ [ 30.797293] ffff88801a939700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.798273] ffff88801a939780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.799220] ================================================================== [ 30.800624] Disabling lock debugging due to kernel taint [ 32.699324] BUG: Bad rss-counter state mm:00000000001a0055 type:MM_FILEPAGES val:33 [ 32.700038] BUG: Bad rss-counter state mm:00000000001a0055 type:MM_ANONPAGES val:22 [ 33.156557] BUG: Bad rss-counter state mm:00000000203724dd type:MM_FILEPAGES val:33 [ 33.157567] BUG: Bad rss-counter state mm:00000000203724dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42709' (ECDSA) to the list of known hosts. 2023/06/20 18:15:44 fuzzer started 2023/06/20 18:15:44 dialing manager at localhost:36067 2023/06/20 18:15:44 checking machine... 2023/06/20 18:15:44 checking revisions... [ 33.876842] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:15:45 testing simple program... [ 33.915817] cgroup: Unknown subsys name 'net' [ 33.960646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801aa09488 RCX=ffff8880087b8a00 RDX=ffffea00006a8240 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff8880103bf808 R8 =ffff88801aa093a0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000110010 R12=dffffc0000000000 R13=ffff8880103bf848 R14=ffff8880087b8a00 R15=ffff88801aa092b8 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f1607f4b900 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=00007f160738c440 CR3=000000000c976000 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=8e97ca3a3c2166ac00000000000ae988 XMM05=99ec85eacb31439000000000001337c0 XMM06=2a75bc6987d8a2d20000000000132560 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=ffff8880180f8000 RCX=ffffed1001d5ef78 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880180f8288 RBP=ffff88800eaf7d90 RSP=ffff88800eaf7c90 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000001 R14=ffff8880180f86b8 R15=ffff8880180f83a0 RIP=ffffffff8367fa54 RFL=00000286 [--S--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 00007ff9ffaab900 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=00007ffa00062618 CR3=00000000095b4000 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