syzkaller login: [ 30.714903] BUG: Bad rss-counter state mm:00000000fb95b7d3 type:MM_FILEPAGES val:33 [ 30.716091] BUG: Bad rss-counter state mm:00000000fb95b7d3 type:MM_ANONPAGES val:22 [ 30.753712] ================================================================== [ 30.754597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.755584] Read of size 8 at addr ffff88800d5c0140 by task sshd/221 [ 30.756426] [ 30.756672] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.757776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758785] Call Trace: [ 30.759161] <TASK> [ 30.759448] dump_stack_lvl+0x91/0xf0 [ 30.759934] print_report+0xcc/0x620 [ 30.760502] ? __virt_addr_valid+0x102/0x340 [ 30.761148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762499] kasan_report+0xbe/0xf0 [ 30.762971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763592] vma_interval_tree_remove+0xc75/0xec0 [ 30.764195] vma_prepare+0xc54/0x11a0 [ 30.764673] __split_vma+0x5af/0x950 [ 30.765136] ? __pfx___split_vma+0x10/0x10 [ 30.765673] ? find_held_lock+0x2c/0x110 [ 30.766194] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766747] ? lock_is_held_type+0x9f/0x120 [ 30.767284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.767889] ? mtree_range_walk+0x632/0x900 [ 30.768440] ? mas_walk+0x5c7/0x7c0 [ 30.768909] do_vmi_munmap+0x1f1/0x2b0 [ 30.769417] mmap_region+0x1f9/0x2660 [ 30.769896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.770404] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.771115] ? __pfx_lock_acquire+0x10/0x10 [ 30.771644] ? __pfx_mmap_region+0x10/0x10 [ 30.772171] ? security_mmap_addr+0x7d/0xa0 [ 30.772697] ? get_unmapped_area+0x1f5/0x3f0 [ 30.773242] do_mmap+0x854/0xf00 [ 30.773688] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.774182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.774737] ksys_mmap_pgoff+0x3af/0x500 [ 30.775241] do_syscall_64+0x3f/0x90 [ 30.775712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776353] RIP: 0033:0x7f679faa0d82 [ 30.776806] 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 [ 30.778930] RSP: 002b:00007ffd7bd3d4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f679faa0d82 [ 30.780674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f679eeda000 [ 30.781521] RBP: 00007f679eeda000 R08: 0000000000000009 R09: 0000000000001000 [ 30.782362] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e510590ec0 [ 30.783205] R13: 00007ffd7bd3d4c0 R14: 00007ffd7bd3d4f0 R15: 00007ffd7bd3d850 [ 30.784062] </TASK> [ 30.784352] [ 30.784568] Allocated by task 214: [ 30.784990] kasan_save_stack+0x22/0x50 [ 30.785506] kasan_set_track+0x25/0x30 [ 30.785993] __kasan_slab_alloc+0x59/0x70 [ 30.786513] kmem_cache_alloc+0x16b/0x370 [ 30.787026] vm_area_dup+0x20/0x160 [ 30.787482] __split_vma+0x170/0x950 [ 30.787944] split_vma+0xc6/0x110 [ 30.788376] mprotect_fixup+0x8d2/0xb30 [ 30.788876] do_mprotect_pkey+0x87e/0xd40 [ 30.789401] __x64_sys_mprotect+0x78/0xc0 [ 30.789913] do_syscall_64+0x3f/0x90 [ 30.790386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791015] [ 30.791229] Freed by task 13: [ 30.791608] kasan_save_stack+0x22/0x50 [ 30.792106] kasan_set_track+0x25/0x30 [ 30.792595] kasan_save_free_info+0x2b/0x50 [ 30.793119] __kasan_slab_free+0x10a/0x190 [ 30.793655] kmem_cache_free+0x10d/0x4d0 [ 30.794163] rcu_core+0x8c8/0x2860 [ 30.794600] __do_softirq+0x1b7/0x7d4 [ 30.795067] [ 30.795282] Last potentially related work creation: [ 30.795863] kasan_save_stack+0x22/0x50 [ 30.796360] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.797587] remove_vma+0x139/0x170 [ 30.798029] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.798643] do_vmi_munmap+0x1f1/0x2b0 [ 30.799127] __vm_munmap+0x138/0x3a0 [ 30.799586] __x64_sys_munmap+0x59/0x80 [ 30.800078] do_syscall_64+0x3f/0x90 [ 30.800548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801186] [ 30.801408] The buggy address belongs to the object at ffff88800d5c00e8 [ 30.801408] which belongs to the cache vm_area_struct of size 168 [ 30.802860] The buggy address is located 88 bytes inside of [ 30.802860] freed 168-byte region [ffff88800d5c00e8, ffff88800d5c0190) [ 30.804246] [ 30.804460] The buggy address belongs to the physical page: [ 30.805110] page:00000000263e3501 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c0 [ 30.806191] memcg:ffff88800e1cea01 [ 30.806612] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.807249] page_type: 0xffffffff() [ 30.807691] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.808600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1cea01 [ 30.809503] page dumped because: kasan: bad access detected [ 30.810154] [ 30.810370] Memory state around the buggy address: [ 30.810949] ffff88800d5c0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.811803] ffff88800d5c0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.812650] >ffff88800d5c0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.813498] ^ [ 30.814133] ffff88800d5c0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.814981] ffff88800d5c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.815820] ================================================================== [ 30.816782] Disabling lock debugging due to kernel taint [ 33.327828] BUG: Bad rss-counter state mm:00000000f80695fe type:MM_FILEPAGES val:33 [ 33.329060] BUG: Bad rss-counter state mm:00000000f80695fe type:MM_ANONPAGES val:22 [ 33.742915] BUG: Bad rss-counter state mm:000000002987da39 type:MM_FILEPAGES val:33 [ 33.744191] BUG: Bad rss-counter state mm:000000002987da39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38959' (ECDSA) to the list of known hosts. 2023/06/19 18:18:31 fuzzer started 2023/06/19 18:18:31 dialing manager at localhost:44161 2023/06/19 18:18:31 checking machine... 2023/06/19 18:18:31 checking revisions... [ 34.429020] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:18:31 testing simple program... [ 34.471099] cgroup: Unknown subsys name 'net' [ 34.514705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffff3b7fd78 CR3=000000000c538000 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=2030333a38313a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002beb58c RBX=ffffed1002beb58d RCX=ffffffff81851d14 RDX=ffffed1002beb58d RSI=0000000000000004 RDI=ffff888015f5ac64 RBP=ffffed1002beb58c RSP=ffff888018207a70 R8 =0000000000000001 R9 =ffffed1002beb58c R10=ffff888015f5ac67 R11=0000000000000001 R12=0000000000000001 R13=ffff88800d6ef580 R14=0000000000000001 R15=ffff88800d6ef590 RIP=ffffffff8180f009 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 00007fbb5fe78900 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=00007fbb604300b0 CR3=0000000019b38000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000