syzkaller login: [ 33.337500] BUG: Bad rss-counter state mm:00000000d752fbe5 type:MM_FILEPAGES val:33 [ 33.339050] BUG: Bad rss-counter state mm:00000000d752fbe5 type:MM_ANONPAGES val:22 [ 33.506462] ================================================================== [ 33.507409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.508398] Read of size 8 at addr ffff88801a258d08 by task sshd/221 [ 33.509283] [ 33.509506] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.510399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.511407] Call Trace: [ 33.511764] [ 33.512048] dump_stack_lvl+0x91/0xf0 [ 33.512561] print_report+0xcc/0x620 [ 33.513050] ? __virt_addr_valid+0x102/0x340 [ 33.513617] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.514270] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.514916] kasan_report+0xbe/0xf0 [ 33.515416] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.516068] vma_interval_tree_remove+0xc75/0xec0 [ 33.516699] vma_prepare+0xc54/0x11a0 [ 33.517190] __split_vma+0x5af/0x950 [ 33.517682] ? __pfx___split_vma+0x10/0x10 [ 33.518225] ? find_held_lock+0x2c/0x110 [ 33.518779] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.519370] ? lock_is_held_type+0x9f/0x120 [ 33.519933] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.520564] ? mtree_range_walk+0x632/0x900 [ 33.521114] ? mas_walk+0x5c7/0x7c0 [ 33.521624] do_vmi_munmap+0x1f1/0x2b0 [ 33.522119] mmap_region+0x1f9/0x2660 [ 33.522630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.523143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.523912] ? __pfx_lock_acquire+0x10/0x10 [ 33.524474] ? __pfx_mmap_region+0x10/0x10 [ 33.525003] ? security_mmap_addr+0x7d/0xa0 [ 33.525556] ? get_unmapped_area+0x1f5/0x3f0 [ 33.526109] do_mmap+0x854/0xf00 [ 33.526592] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.527089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.527692] ksys_mmap_pgoff+0x3af/0x500 [ 33.528203] do_syscall_64+0x3f/0x90 [ 33.528693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.529358] RIP: 0033:0x7f72a17b6d82 [ 33.529820] 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 [ 33.532037] RSP: 002b:00007fff66034888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.532965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72a17b6d82 [ 33.533911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72a0bf0000 [ 33.534946] RBP: 00007f72a0bf0000 R08: 0000000000000009 R09: 0000000000001000 [ 33.536092] R10: 0000000000000812 R11: 0000000000000206 R12: 000056394f231f60 [ 33.537066] R13: 00007fff660348a0 R14: 00007fff660348d0 R15: 00007fff66034c30 [ 33.538027] [ 33.538357] [ 33.538585] Allocated by task 214: [ 33.539020] kasan_save_stack+0x22/0x50 [ 33.539638] kasan_set_track+0x25/0x30 [ 33.540144] __kasan_slab_alloc+0x59/0x70 [ 33.540680] kmem_cache_alloc+0x16b/0x370 [ 33.541195] vm_area_dup+0x20/0x160 [ 33.541669] __split_vma+0x170/0x950 [ 33.542137] split_vma+0xc6/0x110 [ 33.542595] mprotect_fixup+0x8d2/0xb30 [ 33.543101] do_mprotect_pkey+0x87e/0xd40 [ 33.543681] __x64_sys_mprotect+0x78/0xc0 [ 33.544199] do_syscall_64+0x3f/0x90 [ 33.544687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.545340] [ 33.545558] Freed by task 214: [ 33.545951] kasan_save_stack+0x22/0x50 [ 33.546477] kasan_set_track+0x25/0x30 [ 33.546976] kasan_save_free_info+0x2b/0x50 [ 33.547538] __kasan_slab_free+0x10a/0x190 [ 33.548077] kmem_cache_free+0x10d/0x4d0 [ 33.548622] rcu_core+0x8c8/0x2860 [ 33.549080] __do_softirq+0x1b7/0x7d4 [ 33.549567] [ 33.549782] Last potentially related work creation: [ 33.550389] kasan_save_stack+0x22/0x50 [ 33.550900] __kasan_record_aux_stack+0x8e/0xa0 [ 33.551483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.552153] remove_vma+0x139/0x170 [ 33.552623] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.553182] do_vmi_munmap+0x1f1/0x2b0 [ 33.553698] __vm_munmap+0x138/0x3a0 [ 33.554172] __x64_sys_munmap+0x59/0x80 [ 33.554680] do_syscall_64+0x3f/0x90 [ 33.555167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.555839] [ 33.556060] The buggy address belongs to the object at ffff88801a258cb0 [ 33.556060] which belongs to the cache vm_area_struct of size 168 [ 33.557653] The buggy address is located 88 bytes inside of [ 33.557653] freed 168-byte region [ffff88801a258cb0, ffff88801a258d58) [ 33.559173] [ 33.559419] The buggy address belongs to the physical page: [ 33.560133] page:000000000f23ab47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a258 [ 33.561309] memcg:ffff88801a2b2d01 [ 33.561755] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.562465] page_type: 0xffffffff() [ 33.562935] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.563932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2b2d01 [ 33.564889] page dumped because: kasan: bad access detected [ 33.565593] [ 33.565814] Memory state around the buggy address: [ 33.566445] ffff88801a258c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.567357] ffff88801a258c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.568271] >ffff88801a258d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.569180] ^ [ 33.569664] ffff88801a258d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.570577] ffff88801a258e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.571494] ================================================================== [ 33.572627] Disabling lock debugging due to kernel taint [ 36.080223] BUG: Bad rss-counter state mm:000000009bb28868 type:MM_FILEPAGES val:31 [ 36.081381] BUG: Bad rss-counter state mm:000000009bb28868 type:MM_ANONPAGES val:22 [ 36.495695] BUG: Bad rss-counter state mm:000000000297ee79 type:MM_FILEPAGES val:33 [ 36.496894] BUG: Bad rss-counter state mm:000000000297ee79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37308' (ECDSA) to the list of known hosts. 2023/06/19 22:42:44 fuzzer started 2023/06/19 22:42:45 dialing manager at localhost:44161 2023/06/19 22:42:45 checking machine... 2023/06/19 22:42:45 checking revisions... [ 37.193062] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:42:45 testing simple program... [ 37.243077] cgroup: Unknown subsys name 'net' [ 37.304173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f977929c000 RCX=ffffffff81007b82 RDX=ffff888016021b40 RSI=00007f977929c000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff888019cc7368 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff888019cc74b0 R13=0000000000000000 R14=ffff888016021b40 R15=0000000000092cc0 RIP=ffffffff814c03b8 RFL=00000206 [-----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 00007f9778da9900 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=00007ffd1866d000 CR3=000000000e9c0000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fcea75d2000 CR3=0000000016e48000 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=2034343a32343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a32343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000