syzkaller login: [ 32.413524] BUG: Bad rss-counter state mm:00000000919028cf type:MM_FILEPAGES val:33 [ 32.414570] BUG: Bad rss-counter state mm:00000000919028cf type:MM_ANONPAGES val:22 [ 32.457968] ================================================================== [ 32.458955] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.459846] Read of size 8 at addr ffff88800dc16140 by task sshd/220 [ 32.460587] [ 32.460798] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.461622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.462549] Call Trace: [ 32.462851] [ 32.463116] dump_stack_lvl+0x91/0xf0 [ 32.463584] print_report+0xcc/0x620 [ 32.464042] ? __virt_addr_valid+0x102/0x340 [ 32.464578] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.465175] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.465764] kasan_report+0xbe/0xf0 [ 32.466213] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.466808] vma_interval_tree_remove+0xc75/0xec0 [ 32.467380] vma_prepare+0xc54/0x11a0 [ 32.467829] __split_vma+0x5af/0x950 [ 32.468277] ? __pfx___split_vma+0x10/0x10 [ 32.468816] ? find_held_lock+0x2c/0x110 [ 32.469310] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.469847] ? lock_is_held_type+0x9f/0x120 [ 32.470359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.470932] ? mtree_range_walk+0x632/0x900 [ 32.471459] ? mas_walk+0x5c7/0x7c0 [ 32.471910] do_vmi_munmap+0x1f1/0x2b0 [ 32.472394] mmap_region+0x1f9/0x2660 [ 32.472896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.473438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.474235] ? __pfx_lock_acquire+0x10/0x10 [ 32.474814] ? __pfx_mmap_region+0x10/0x10 [ 32.475389] ? security_mmap_addr+0x7d/0xa0 [ 32.475950] ? get_unmapped_area+0x1f5/0x3f0 [ 32.476552] do_mmap+0x854/0xf00 [ 32.477023] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.477545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.478143] ksys_mmap_pgoff+0x3af/0x500 [ 32.478679] do_syscall_64+0x3f/0x90 [ 32.479185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.479876] RIP: 0033:0x7f36d9420d82 [ 32.480375] 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 [ 32.482419] RSP: 002b:00007ffc51c85688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.483273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36d9420d82 [ 32.484077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36d885a000 [ 32.484908] RBP: 00007f36d885a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.485732] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc90543ec0 [ 32.486562] R13: 00007ffc51c856a0 R14: 00007ffc51c856d0 R15: 00007ffc51c85a30 [ 32.487360] [ 32.487639] [ 32.487843] Allocated by task 213: [ 32.488254] kasan_save_stack+0x22/0x50 [ 32.488754] kasan_set_track+0x25/0x30 [ 32.489224] __kasan_slab_alloc+0x59/0x70 [ 32.489719] kmem_cache_alloc+0x16b/0x370 [ 32.490213] vm_area_dup+0x20/0x160 [ 32.490643] __split_vma+0x170/0x950 [ 32.491081] split_vma+0xc6/0x110 [ 32.491494] mprotect_fixup+0x8d2/0xb30 [ 32.491960] do_mprotect_pkey+0x87e/0xd40 [ 32.492469] __x64_sys_mprotect+0x78/0xc0 [ 32.492958] do_syscall_64+0x3f/0x90 [ 32.493398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.493999] [ 32.494198] Freed by task 13: [ 32.494561] kasan_save_stack+0x22/0x50 [ 32.495028] kasan_set_track+0x25/0x30 [ 32.495488] kasan_save_free_info+0x2b/0x50 [ 32.495981] __kasan_slab_free+0x10a/0x190 [ 32.496502] kmem_cache_free+0x10d/0x4d0 [ 32.496977] rcu_core+0x8c8/0x2860 [ 32.497395] __do_softirq+0x1b7/0x7d4 [ 32.497840] [ 32.498043] Last potentially related work creation: [ 32.498599] kasan_save_stack+0x22/0x50 [ 32.499067] __kasan_record_aux_stack+0x8e/0xa0 [ 32.499600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.500202] remove_vma+0x139/0x170 [ 32.500637] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.501155] do_vmi_munmap+0x1f1/0x2b0 [ 32.501605] __vm_munmap+0x138/0x3a0 [ 32.502043] __x64_sys_munmap+0x59/0x80 [ 32.502509] do_syscall_64+0x3f/0x90 [ 32.502961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.503556] [ 32.503762] The buggy address belongs to the object at ffff88800dc160e8 [ 32.503762] which belongs to the cache vm_area_struct of size 168 [ 32.505149] The buggy address is located 88 bytes inside of [ 32.505149] freed 168-byte region [ffff88800dc160e8, ffff88800dc16190) [ 32.506461] [ 32.506665] The buggy address belongs to the physical page: [ 32.507288] page:00000000e1f02187 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc16 [ 32.508316] memcg:ffff88800c7a1301 [ 32.508730] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.509433] page_type: 0xffffffff() [ 32.509860] raw: 0100000000000200 ffff88800879fc80 ffffea000037f080 dead000000000005 [ 32.510782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7a1301 [ 32.511627] page dumped because: kasan: bad access detected [ 32.512238] [ 32.512460] Memory state around the buggy address: [ 32.512997] ffff88800dc16000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.513787] ffff88800dc16080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.514584] >ffff88800dc16100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.515384] ^ [ 32.515979] ffff88800dc16180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.516803] ffff88800dc16200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.517598] ================================================================== [ 32.518813] Disabling lock debugging due to kernel taint [ 34.647597] BUG: Bad rss-counter state mm:000000001265ad69 type:MM_FILEPAGES val:33 [ 34.649507] BUG: Bad rss-counter state mm:000000001265ad69 type:MM_ANONPAGES val:22 [ 35.126340] BUG: Bad rss-counter state mm:00000000aa09b9f1 type:MM_FILEPAGES val:33 [ 35.127507] BUG: Bad rss-counter state mm:00000000aa09b9f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44520' (ECDSA) to the list of known hosts. 2023/06/20 00:07:31 fuzzer started 2023/06/20 00:07:31 dialing manager at localhost:44161 2023/06/20 00:07:31 checking machine... 2023/06/20 00:07:31 checking revisions... [ 35.864826] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:07:31 testing simple program... [ 35.908131] cgroup: Unknown subsys name 'net' [ 35.972150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:07:30 Registers: info registers vcpu 0 RAX=ffff8880094d6400 RBX=ffff8880094d6400 RCX=dffffc0000000000 RDX=ffff888015cc1b40 RSI=ffffffff8449f0ad RDI=ffff8880094d64f0 RBP=ffff8880094d6408 RSP=ffff88801c8afce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff8880094d6400 R13=ffffed1003915fcb R14=ffff8880094d641c R15=ffff88801c8afe59 RIP=ffffffff8449f0db 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd0e266a900 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=00007fd0e320c968 CR3=000000000e6ba000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b5c92 RBX=0000000000000002 RCX=ffffffff84531da6 RDX=00000000000b5c93 RSI=000000000003531d RDI=ffffffff864b4f3e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b4f38 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130861 RFL=00000287 [--S--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 =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=00007f237fc7ade0 CR3=000000000d970000 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=00000000000000000000000000000000 XMM01=5b89374e35930b9d6d4e527c8bc06bb7 XMM02=000000000011cfd8ec2efd57dc4c00df XMM03=0000000000124570c2676ccda23fee16 XMM04=11dc0718d7bb4cad00000000000ae988 XMM05=19e9129bd510f2350000000000134110 XMM06=bb0f2ed577623f880000000000132f78 XMM07=e042d86d42eb936e00000000001247f0 XMM08=c2676ccda23fee16000000000011d038 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000