syzkaller login: [ 31.573713] BUG: Bad rss-counter state mm:00000000fec1e655 type:MM_FILEPAGES val:33 [ 31.575751] BUG: Bad rss-counter state mm:00000000fec1e655 type:MM_ANONPAGES val:22 [ 31.735115] ================================================================== [ 31.736169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.737221] Read of size 8 at addr ffff88800f2ad058 by task sshd/220 [ 31.738199] [ 31.738453] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.739430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.740579] Call Trace: [ 31.740956] [ 31.741289] dump_stack_lvl+0x91/0xf0 [ 31.741860] print_report+0xcc/0x620 [ 31.742418] ? __virt_addr_valid+0x102/0x340 [ 31.743069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.743798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.744522] kasan_report+0xbe/0xf0 [ 31.745075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.745797] vma_interval_tree_remove+0xc75/0xec0 [ 31.746506] vma_prepare+0xc54/0x11a0 [ 31.747061] __split_vma+0x5af/0x950 [ 31.747613] ? __pfx___split_vma+0x10/0x10 [ 31.748247] ? find_held_lock+0x2c/0x110 [ 31.748859] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.749513] ? lock_is_held_type+0x9f/0x120 [ 31.750140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.750849] ? mtree_range_walk+0x632/0x900 [ 31.751486] ? mas_walk+0x5c7/0x7c0 [ 31.752054] do_vmi_munmap+0x1f1/0x2b0 [ 31.752628] mmap_region+0x1f9/0x2660 [ 31.753193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.753797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.754631] ? __pfx_lock_acquire+0x10/0x10 [ 31.755255] ? __pfx_mmap_region+0x10/0x10 [ 31.755888] ? security_mmap_addr+0x7d/0xa0 [ 31.756513] ? get_unmapped_area+0x1f5/0x3f0 [ 31.757159] do_mmap+0x854/0xf00 [ 31.757670] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.758250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.758912] ksys_mmap_pgoff+0x3af/0x500 [ 31.759504] do_syscall_64+0x3f/0x90 [ 31.760090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760847] RIP: 0033:0x7f2b984fcd82 [ 31.761385] 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 [ 31.763876] RSP: 002b:00007ffd57d8a4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.764935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b984fcd82 [ 31.765932] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b97936000 [ 31.766920] RBP: 00007f2b97936000 R08: 0000000000000009 R09: 0000000000001000 [ 31.767930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1a6421f70 [ 31.768929] R13: 00007ffd57d8a4e0 R14: 00007ffd57d8a510 R15: 00007ffd57d8a870 [ 31.769924] [ 31.770269] [ 31.770524] Allocated by task 213: [ 31.771027] kasan_save_stack+0x22/0x50 [ 31.771626] kasan_set_track+0x25/0x30 [ 31.772209] __kasan_slab_alloc+0x59/0x70 [ 31.772829] kmem_cache_alloc+0x16b/0x370 [ 31.773428] vm_area_dup+0x20/0x160 [ 31.773960] __split_vma+0x170/0x950 [ 31.774499] split_vma+0xc6/0x110 [ 31.775022] mprotect_fixup+0x8d2/0xb30 [ 31.775604] do_mprotect_pkey+0x87e/0xd40 [ 31.776238] __x64_sys_mprotect+0x78/0xc0 [ 31.776857] do_syscall_64+0x3f/0x90 [ 31.777414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778178] [ 31.778429] Freed by task 213: [ 31.778892] kasan_save_stack+0x22/0x50 [ 31.779478] kasan_set_track+0x25/0x30 [ 31.780064] kasan_save_free_info+0x2b/0x50 [ 31.780688] __kasan_slab_free+0x10a/0x190 [ 31.781307] kmem_cache_free+0x10d/0x4d0 [ 31.781904] rcu_core+0x8c8/0x2860 [ 31.782430] __do_softirq+0x1b7/0x7d4 [ 31.782986] [ 31.783240] Last potentially related work creation: [ 31.783933] kasan_save_stack+0x22/0x50 [ 31.784523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.785205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.785962] remove_vma+0x139/0x170 [ 31.786492] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.787143] do_vmi_munmap+0x1f1/0x2b0 [ 31.787727] __vm_munmap+0x138/0x3a0 [ 31.788277] __x64_sys_munmap+0x59/0x80 [ 31.788856] do_syscall_64+0x3f/0x90 [ 31.789412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.790162] [ 31.790414] The buggy address belongs to the object at ffff88800f2ad000 [ 31.790414] which belongs to the cache vm_area_struct of size 168 [ 31.792142] The buggy address is located 88 bytes inside of [ 31.792142] freed 168-byte region [ffff88800f2ad000, ffff88800f2ad0a8) [ 31.793782] [ 31.794035] The buggy address belongs to the physical page: [ 31.794807] page:00000000babb311f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ad [ 31.796106] memcg:ffff88800dbe4101 [ 31.796599] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.797348] page_type: 0xffffffff() [ 31.797879] raw: 0100000000000200 ffff88800879fc80 ffffea000036bc80 dead000000000006 [ 31.798963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe4101 [ 31.800027] page dumped because: kasan: bad access detected [ 31.800801] [ 31.801056] Memory state around the buggy address: [ 31.801740] ffff88800f2acf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.802744] ffff88800f2acf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.803758] >ffff88800f2ad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.804758] ^ [ 31.805611] ffff88800f2ad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.806614] ffff88800f2ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.807616] ================================================================== [ 31.808814] Disabling lock debugging due to kernel taint [ 33.747417] BUG: Bad rss-counter state mm:00000000fc6af175 type:MM_FILEPAGES val:33 [ 33.748487] BUG: Bad rss-counter state mm:00000000fc6af175 type:MM_ANONPAGES val:22 [ 34.194607] BUG: Bad rss-counter state mm:00000000a36ea786 type:MM_FILEPAGES val:33 [ 34.195821] BUG: Bad rss-counter state mm:00000000a36ea786 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41368' (ECDSA) to the list of known hosts. 2023/06/19 23:26:11 fuzzer started 2023/06/19 23:26:11 dialing manager at localhost:44161 2023/06/19 23:26:11 checking machine... 2023/06/19 23:26:11 checking revisions... [ 34.933652] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:26:11 testing simple program... [ 34.976530] cgroup: Unknown subsys name 'net' [ 35.017695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:26:11 Registers: info registers vcpu 0 RAX=ffffffff813782a8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffffffff813782a8 RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff8880167a3680 R15=ffff88800c63ba80 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f7dc1ed4900 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=00007f7dc248b618 CR3=00000000094bc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffd6923fe58 CR3=000000000e290000 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=2031313a36323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000