syzkaller login: [ 31.536046] BUG: Bad rss-counter state mm:0000000009b8bbbe type:MM_FILEPAGES val:33 [ 31.537096] BUG: Bad rss-counter state mm:0000000009b8bbbe type:MM_ANONPAGES val:22 [ 31.711932] ================================================================== [ 31.712865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.713812] Read of size 8 at addr ffff88801470f140 by task sshd/220 [ 31.714587] [ 31.714896] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.715784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.716769] Call Trace: [ 31.717104] [ 31.717392] dump_stack_lvl+0x91/0xf0 [ 31.717886] print_report+0xcc/0x620 [ 31.718379] ? __virt_addr_valid+0x102/0x340 [ 31.718941] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.719587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.720220] kasan_report+0xbe/0xf0 [ 31.720706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721344] vma_interval_tree_remove+0xc75/0xec0 [ 31.721972] vma_prepare+0xc54/0x11a0 [ 31.722468] __split_vma+0x5af/0x950 [ 31.722960] ? __pfx___split_vma+0x10/0x10 [ 31.723516] ? find_held_lock+0x2c/0x110 [ 31.724052] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.724631] ? lock_is_held_type+0x9f/0x120 [ 31.725190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.725820] ? mtree_range_walk+0x632/0x900 [ 31.726382] ? mas_walk+0x5c7/0x7c0 [ 31.726869] do_vmi_munmap+0x1f1/0x2b0 [ 31.727374] mmap_region+0x1f9/0x2660 [ 31.727893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.728424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.729164] ? __pfx_lock_acquire+0x10/0x10 [ 31.729712] ? __pfx_mmap_region+0x10/0x10 [ 31.730266] ? security_mmap_addr+0x7d/0xa0 [ 31.730809] ? get_unmapped_area+0x1f5/0x3f0 [ 31.731375] do_mmap+0x854/0xf00 [ 31.731835] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.732348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.732931] ksys_mmap_pgoff+0x3af/0x500 [ 31.733461] do_syscall_64+0x3f/0x90 [ 31.733958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734630] RIP: 0033:0x7f994f020d82 [ 31.735102] 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 [ 31.737313] RSP: 002b:00007fffb5f24298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.738259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f994f020d82 [ 31.739130] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f994e45a000 [ 31.740022] RBP: 00007f994e45a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.740899] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560041144ec0 [ 31.741776] R13: 00007fffb5f242b0 R14: 00007fffb5f242e0 R15: 00007fffb5f24640 [ 31.742660] [ 31.742959] [ 31.743180] Allocated by task 213: [ 31.743629] kasan_save_stack+0x22/0x50 [ 31.744151] kasan_set_track+0x25/0x30 [ 31.744655] __kasan_slab_alloc+0x59/0x70 [ 31.745191] kmem_cache_alloc+0x16b/0x370 [ 31.745729] vm_area_dup+0x20/0x160 [ 31.746200] __split_vma+0x170/0x950 [ 31.746680] split_vma+0xc6/0x110 [ 31.747135] mprotect_fixup+0x8d2/0xb30 [ 31.747661] do_mprotect_pkey+0x87e/0xd40 [ 31.748202] __x64_sys_mprotect+0x78/0xc0 [ 31.748736] do_syscall_64+0x3f/0x90 [ 31.749223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.749889] [ 31.750113] Freed by task 213: [ 31.750517] kasan_save_stack+0x22/0x50 [ 31.751033] kasan_set_track+0x25/0x30 [ 31.751554] kasan_save_free_info+0x2b/0x50 [ 31.752110] __kasan_slab_free+0x10a/0x190 [ 31.752660] kmem_cache_free+0x10d/0x4d0 [ 31.753185] rcu_core+0x8c8/0x2860 [ 31.753641] __do_softirq+0x1b7/0x7d4 [ 31.754135] [ 31.754355] Last potentially related work creation: [ 31.754967] kasan_save_stack+0x22/0x50 [ 31.755483] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.756756] remove_vma+0x139/0x170 [ 31.757223] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.757794] do_vmi_munmap+0x1f1/0x2b0 [ 31.758292] __vm_munmap+0x138/0x3a0 [ 31.758776] __x64_sys_munmap+0x59/0x80 [ 31.759287] do_syscall_64+0x3f/0x90 [ 31.759790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760456] [ 31.760678] The buggy address belongs to the object at ffff88801470f0e8 [ 31.760678] which belongs to the cache vm_area_struct of size 168 [ 31.762192] The buggy address is located 88 bytes inside of [ 31.762192] freed 168-byte region [ffff88801470f0e8, ffff88801470f190) [ 31.763664] [ 31.763884] The buggy address belongs to the physical page: [ 31.764562] page:0000000096a2b32c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1470f [ 31.765689] memcg:ffff888019229601 [ 31.766130] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.766793] page_type: 0xffffffff() [ 31.767255] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.768227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019229601 [ 31.769167] page dumped because: kasan: bad access detected [ 31.769846] [ 31.770071] Memory state around the buggy address: [ 31.770673] ffff88801470f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.771571] ffff88801470f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.772461] >ffff88801470f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.773351] ^ [ 31.774008] ffff88801470f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.774894] ffff88801470f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.775778] ================================================================== [ 31.776832] Disabling lock debugging due to kernel taint [ 33.739900] BUG: Bad rss-counter state mm:0000000081587320 type:MM_FILEPAGES val:33 [ 33.741107] BUG: Bad rss-counter state mm:0000000081587320 type:MM_ANONPAGES val:22 [ 34.214242] BUG: Bad rss-counter state mm:00000000e21af5f7 type:MM_FILEPAGES val:33 [ 34.215454] BUG: Bad rss-counter state mm:00000000e21af5f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55119' (ECDSA) to the list of known hosts. 2023/06/19 16:48:59 fuzzer started 2023/06/19 16:49:00 dialing manager at localhost:44161 2023/06/19 16:49:00 checking machine... 2023/06/19 16:49:00 checking revisions... [ 34.854410] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:49:00 testing simple program... [ 34.900848] cgroup: Unknown subsys name 'net' [ 34.957429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:58 Registers: info registers vcpu 0 RAX=ffff88806ce2bda8 RBX=176a1d5f454ca366 RCX=0000000000000000 RDX=1ffff1100d9c5775 RSI=ffffffff813cb64a RDI=0000000000000004 RBP=ffff88806ce28140 RSP=ffff88806ce09f40 R8 =0000000000000004 R9 =000000000000e5b6 R10=000000000000e5b6 R11=ffff88806ce09ff8 R12=0000000000000046 R13=ffff88806ce2b98c R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff813c285b RFL=00000046 [---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 =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=00007fc27d5edd40 CR3=000000000d5c6000 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=8de55a97184be2a1954b520a27d5edc8 XMM02=2c67c8bc2e329bc3000000000011b4e8 XMM03=fb795ef6d65770560000000000123010 XMM04=3a57b9fa6f55052300000000000ae988 XMM05=19e9129bd510f2350000000000132c10 XMM06=4fda316b135da52b0000000000132a98 XMM07=e042d86d42eb936e0000000000123290 XMM08=a1e5fa04c8071147000000000011b548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888014627b18 RSI=ffff888014627ae0 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000002377f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880159b8000 R15=ffff88806cf09a98 RIP=ffffffff81130937 RFL=00000296 [--S-AP-] 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 00007fb393e50900 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=00007fff581f7000 CR3=000000001cce6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000