syzkaller login: [ 39.256041] BUG: Bad rss-counter state mm:000000003b82ccce type:MM_FILEPAGES val:33 [ 39.257326] BUG: Bad rss-counter state mm:000000003b82ccce type:MM_ANONPAGES val:22 [ 39.295374] ================================================================== [ 39.296312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.297286] Read of size 8 at addr ffff88801a2003f8 by task sshd/219 [ 39.298051] [ 39.298274] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.299145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.300131] Call Trace: [ 39.300453] [ 39.300740] dump_stack_lvl+0x91/0xf0 [ 39.301235] print_report+0xcc/0x620 [ 39.301726] ? __virt_addr_valid+0x102/0x340 [ 39.302283] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.302914] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.303542] kasan_report+0xbe/0xf0 [ 39.304020] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.304650] vma_interval_tree_remove+0xc75/0xec0 [ 39.305252] vma_prepare+0xc54/0x11a0 [ 39.305728] __split_vma+0x5af/0x950 [ 39.306195] ? __pfx___split_vma+0x10/0x10 [ 39.306730] ? find_held_lock+0x2c/0x110 [ 39.307273] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.307832] ? lock_is_held_type+0x9f/0x120 [ 39.308366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.308970] ? mtree_range_walk+0x632/0x900 [ 39.309524] ? mas_walk+0x5c7/0x7c0 [ 39.309994] do_vmi_munmap+0x1f1/0x2b0 [ 39.310483] mmap_region+0x1f9/0x2660 [ 39.310972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.311483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.312192] ? __pfx_lock_acquire+0x10/0x10 [ 39.312731] ? __pfx_mmap_region+0x10/0x10 [ 39.313268] ? security_mmap_addr+0x7d/0xa0 [ 39.313801] ? get_unmapped_area+0x1f5/0x3f0 [ 39.314349] do_mmap+0x854/0xf00 [ 39.314792] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.315298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.315867] ksys_mmap_pgoff+0x3af/0x500 [ 39.316374] do_syscall_64+0x3f/0x90 [ 39.316854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.317508] RIP: 0033:0x7f19e1cc0d82 [ 39.317966] 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 [ 39.320109] RSP: 002b:00007ffd526f0cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.321021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19e1cc0d82 [ 39.321880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19e10fa000 [ 39.322726] RBP: 00007f19e10fa000 R08: 0000000000000009 R09: 0000000000001000 [ 39.323571] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e707c6980 [ 39.324413] R13: 00007ffd526f0ce0 R14: 00007ffd526f0d10 R15: 00007ffd526f1070 [ 39.325277] [ 39.325573] [ 39.325788] Allocated by task 212: [ 39.326218] kasan_save_stack+0x22/0x50 [ 39.326723] kasan_set_track+0x25/0x30 [ 39.327241] __kasan_slab_alloc+0x59/0x70 [ 39.327773] kmem_cache_alloc+0x16b/0x370 [ 39.328283] vm_area_dup+0x20/0x160 [ 39.328741] __split_vma+0x170/0x950 [ 39.329228] split_vma+0xc6/0x110 [ 39.329668] mprotect_fixup+0x8d2/0xb30 [ 39.330165] do_mprotect_pkey+0x87e/0xd40 [ 39.330683] __x64_sys_mprotect+0x78/0xc0 [ 39.331220] do_syscall_64+0x3f/0x90 [ 39.331691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.332337] [ 39.332554] Freed by task 212: [ 39.332947] kasan_save_stack+0x22/0x50 [ 39.333451] kasan_set_track+0x25/0x30 [ 39.333944] kasan_save_free_info+0x2b/0x50 [ 39.334479] __kasan_slab_free+0x10a/0x190 [ 39.335024] kmem_cache_free+0x10d/0x4d0 [ 39.335541] rcu_core+0x8c8/0x2860 [ 39.336026] __do_softirq+0x1b7/0x7d4 [ 39.336502] [ 39.336716] Last potentially related work creation: [ 39.337301] kasan_save_stack+0x22/0x50 [ 39.337811] __kasan_record_aux_stack+0x8e/0xa0 [ 39.338382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.339036] remove_vma+0x139/0x170 [ 39.339518] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.340079] do_vmi_munmap+0x1f1/0x2b0 [ 39.340568] __vm_munmap+0x138/0x3a0 [ 39.341054] __x64_sys_munmap+0x59/0x80 [ 39.341551] do_syscall_64+0x3f/0x90 [ 39.342027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.342689] [ 39.342910] The buggy address belongs to the object at ffff88801a2003a0 [ 39.342910] which belongs to the cache vm_area_struct of size 168 [ 39.344391] The buggy address is located 88 bytes inside of [ 39.344391] freed 168-byte region [ffff88801a2003a0, ffff88801a200448) [ 39.345801] [ 39.346017] The buggy address belongs to the physical page: [ 39.346672] page:00000000efa50981 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a200 [ 39.347779] memcg:ffff888009650001 [ 39.348213] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.348856] page_type: 0xffffffff() [ 39.349304] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.350235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009650001 [ 39.351151] page dumped because: kasan: bad access detected [ 39.351845] [ 39.352072] Memory state around the buggy address: [ 39.352674] ffff88801a200280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.353546] ffff88801a200300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.354414] >ffff88801a200380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.355279] ^ [ 39.356124] ffff88801a200400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.356983] ffff88801a200480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.357831] ================================================================== [ 39.358996] Disabling lock debugging due to kernel taint [ 41.485448] BUG: Bad rss-counter state mm:0000000044b3e5d4 type:MM_FILEPAGES val:33 [ 41.486453] BUG: Bad rss-counter state mm:0000000044b3e5d4 type:MM_ANONPAGES val:22 [ 41.880474] BUG: Bad rss-counter state mm:00000000dfce98e1 type:MM_FILEPAGES val:33 [ 41.881643] BUG: Bad rss-counter state mm:00000000dfce98e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12216' (ECDSA) to the list of known hosts. 2023/06/21 10:33:35 fuzzer started 2023/06/21 10:33:35 dialing manager at localhost:36067 2023/06/21 10:33:35 checking machine... 2023/06/21 10:33:35 checking revisions... [ 42.450828] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:33:36 testing simple program... [ 42.499963] cgroup: Unknown subsys name 'net' [ 42.552845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:35 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f38 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bf1b8 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f40 R15=ffff88806ce09a98 RIP=ffffffff81131039 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 =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=00007ffe873bbff8 CR3=0000000005482000 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=00007f525f0485100000556a92850790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000a RBX=0000000000000000 RCX=0000000000000000 RDX=00007ffdfb30eb90 RSI=00007ffdfb30e9d8 RDI=0000000000000000 RBP=00007ffdfb30ea10 RSP=00007ffdfb30e4c0 R8 =00000000ffffffff R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffdfb30ea20 R13=00007f4d00988258 R14=00007ffdfb30eb60 R15=0000000000000075 RIP=00007f4d0086186b RFL=00000286 [--S--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 00007f4d00403900 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=00007f4d009ba618 CR3=0000000006b08000 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=25252525252525252525252525252525 XMM01=ffffffffff00ff0000ff0000ff0000ff XMM02=ffffffffff0000000000000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=000000000075252e75252e75252e7525 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000