syzkaller login: [ 51.234050] BUG: Bad rss-counter state mm:0000000095592855 type:MM_FILEPAGES val:33 [ 51.235736] BUG: Bad rss-counter state mm:0000000095592855 type:MM_ANONPAGES val:22 [ 51.396809] ================================================================== [ 51.397716] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.398712] Read of size 8 at addr ffff88801602e880 by task sshd/219 [ 51.399635] [ 51.399869] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.400786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.401827] Call Trace: [ 51.402168] [ 51.402466] dump_stack_lvl+0x91/0xf0 [ 51.402986] print_report+0xcc/0x620 [ 51.403487] ? __virt_addr_valid+0x102/0x340 [ 51.404101] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.404739] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.405356] kasan_report+0xbe/0xf0 [ 51.405833] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.406453] vma_interval_tree_remove+0xc75/0xec0 [ 51.407055] vma_prepare+0xc54/0x11a0 [ 51.407540] __split_vma+0x5af/0x950 [ 51.408020] ? __pfx___split_vma+0x10/0x10 [ 51.408550] ? find_held_lock+0x2c/0x110 [ 51.409078] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.409640] ? lock_is_held_type+0x9f/0x120 [ 51.410217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.410822] ? mtree_range_walk+0x632/0x900 [ 51.411373] ? mas_walk+0x5c7/0x7c0 [ 51.411859] do_vmi_munmap+0x1f1/0x2b0 [ 51.412355] mmap_region+0x1f9/0x2660 [ 51.412840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.413373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.414117] ? __pfx_lock_acquire+0x10/0x10 [ 51.414678] ? __pfx_mmap_region+0x10/0x10 [ 51.415230] ? security_mmap_addr+0x7d/0xa0 [ 51.415777] ? get_unmapped_area+0x1f5/0x3f0 [ 51.416378] do_mmap+0x854/0xf00 [ 51.416835] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.417352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.417935] ksys_mmap_pgoff+0x3af/0x500 [ 51.418458] do_syscall_64+0x3f/0x90 [ 51.418952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.419633] RIP: 0033:0x7f12b43ecd82 [ 51.420113] 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 [ 51.422311] RSP: 002b:00007fff203d9848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.423248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12b43ecd82 [ 51.424136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12b3826000 [ 51.425014] RBP: 00007f12b3826000 R08: 0000000000000009 R09: 0000000000001000 [ 51.425884] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcda2b8d90 [ 51.426764] R13: 00007fff203d9860 R14: 00007fff203d9890 R15: 00007fff203d9bf0 [ 51.427659] [ 51.427982] [ 51.428209] Allocated by task 212: [ 51.428647] kasan_save_stack+0x22/0x50 [ 51.429168] kasan_set_track+0x25/0x30 [ 51.429678] __kasan_slab_alloc+0x59/0x70 [ 51.430215] kmem_cache_alloc+0x16b/0x370 [ 51.430760] vm_area_dup+0x20/0x160 [ 51.431235] __split_vma+0x170/0x950 [ 51.431713] split_vma+0xc6/0x110 [ 51.432177] mprotect_fixup+0x8d2/0xb30 [ 51.432699] do_mprotect_pkey+0x87e/0xd40 [ 51.433241] __x64_sys_mprotect+0x78/0xc0 [ 51.433768] do_syscall_64+0x3f/0x90 [ 51.434261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.434935] [ 51.435155] Freed by task 212: [ 51.435559] kasan_save_stack+0x22/0x50 [ 51.436104] kasan_set_track+0x25/0x30 [ 51.436626] kasan_save_free_info+0x2b/0x50 [ 51.437194] __kasan_slab_free+0x10a/0x190 [ 51.437741] kmem_cache_free+0x10d/0x4d0 [ 51.438268] rcu_core+0x8c8/0x2860 [ 51.438729] __do_softirq+0x1b7/0x7d4 [ 51.439223] [ 51.439444] Last potentially related work creation: [ 51.440051] kasan_save_stack+0x22/0x50 [ 51.440571] __kasan_record_aux_stack+0x8e/0xa0 [ 51.441161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.441819] remove_vma+0x139/0x170 [ 51.442299] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.442874] do_vmi_munmap+0x1f1/0x2b0 [ 51.443386] __vm_munmap+0x138/0x3a0 [ 51.443880] __x64_sys_munmap+0x59/0x80 [ 51.444399] do_syscall_64+0x3f/0x90 [ 51.444888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.445558] [ 51.445783] The buggy address belongs to the object at ffff88801602e828 [ 51.445783] which belongs to the cache vm_area_struct of size 168 [ 51.447442] The buggy address is located 88 bytes inside of [ 51.447442] freed 168-byte region [ffff88801602e828, ffff88801602e8d0) [ 51.448946] [ 51.449170] The buggy address belongs to the physical page: [ 51.449870] page:000000008077957d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1602e [ 51.451010] memcg:ffff8880099e9501 [ 51.451451] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.452148] page_type: 0xffffffff() [ 51.452619] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.453569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099e9501 [ 51.454553] page dumped because: kasan: bad access detected [ 51.455258] [ 51.455483] Memory state around the buggy address: [ 51.456110] ffff88801602e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 51.457004] ffff88801602e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.457915] >ffff88801602e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.458824] ^ [ 51.459254] ffff88801602e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.460145] ffff88801602e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 51.461028] ================================================================== [ 51.462054] Disabling lock debugging due to kernel taint [ 53.498112] BUG: Bad rss-counter state mm:00000000e3900427 type:MM_FILEPAGES val:33 [ 53.498857] BUG: Bad rss-counter state mm:00000000e3900427 type:MM_ANONPAGES val:22 [ 53.956211] BUG: Bad rss-counter state mm:0000000033a23704 type:MM_FILEPAGES val:33 [ 53.957626] BUG: Bad rss-counter state mm:0000000033a23704 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57579' (ECDSA) to the list of known hosts. 2023/06/19 11:42:51 fuzzer started 2023/06/19 11:42:52 dialing manager at localhost:44161 2023/06/19 11:42:52 checking machine... 2023/06/19 11:42:52 checking revisions... [ 54.664523] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:42:52 testing simple program... [ 54.711359] cgroup: Unknown subsys name 'net' [ 54.774685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b18 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81370a3a RDI=ffff88806ce09b24 RBP=0000000000000002 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888015bc51c0 R15=ffff88800e775200 RIP=ffffffff813ad4b6 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5a29a0b900 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=00007f5a28f2b000 CR3=000000000f828000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e1f7d0e73eded1e200000000000ae988 XMM05=fdf3ffa695dda1700000000000134e50 XMM06=806171799158d9670000000000133c40 XMM07=fb795ef6d657705600000000001241d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f789b40 RSI=ffffffff8386d57e RDI=0000000000000005 RBP=1ffff110012fcefb RSP=ffff8880097e77d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801635b000 R13=00000000000000e4 R14=ffffffff87f94640 R15=ffff8880097e77f8 RIP=ffffffff814c081b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f59affc5900 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=00007ffdbbeb3000 CR3=00000000159aa000 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