syzkaller login: [ 45.636849] sshd (212) used greatest stack depth: 23992 bytes left [ 45.637621] BUG: Bad rss-counter state mm:00000000e1a7673c type:MM_FILEPAGES val:33 [ 45.638783] BUG: Bad rss-counter state mm:00000000e1a7673c type:MM_ANONPAGES val:22 [ 45.746824] ================================================================== [ 45.747973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.748811] Read of size 8 at addr ffff88800ea51df0 by task sshd/219 [ 45.749423] [ 45.749592] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.750268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.751217] Call Trace: [ 45.751481] [ 45.751701] dump_stack_lvl+0x91/0xf0 [ 45.752079] print_report+0xcc/0x620 [ 45.752465] ? __virt_addr_valid+0x102/0x340 [ 45.752899] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.753395] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.753874] kasan_report+0xbe/0xf0 [ 45.754252] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.754739] vma_interval_tree_remove+0xc75/0xec0 [ 45.755219] vma_prepare+0xc54/0x11a0 [ 45.755605] __split_vma+0x5af/0x950 [ 45.755971] ? __pfx___split_vma+0x10/0x10 [ 45.756391] ? find_held_lock+0x2c/0x110 [ 45.756793] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.757251] ? lock_is_held_type+0x9f/0x120 [ 45.757680] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.758151] ? mtree_range_walk+0x632/0x900 [ 45.758590] ? mas_walk+0x5c7/0x7c0 [ 45.758956] do_vmi_munmap+0x1f1/0x2b0 [ 45.759356] mmap_region+0x1f9/0x2660 [ 45.759696] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.760042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.760547] ? __pfx_lock_acquire+0x10/0x10 [ 45.760917] ? __pfx_mmap_region+0x10/0x10 [ 45.761293] ? security_mmap_addr+0x7d/0xa0 [ 45.761668] ? get_unmapped_area+0x1f5/0x3f0 [ 45.762039] do_mmap+0x854/0xf00 [ 45.762355] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.762704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.763092] ksys_mmap_pgoff+0x3af/0x500 [ 45.763456] do_syscall_64+0x3f/0x90 [ 45.763783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.764236] RIP: 0033:0x7fdcedc81d82 [ 45.764568] 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 [ 45.766062] RSP: 002b:00007ffccca69a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.766695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcedc81d82 [ 45.767301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdced0bb000 [ 45.767887] RBP: 00007fdced0bb000 R08: 0000000000000009 R09: 0000000000001000 [ 45.768477] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3e8f01ec0 [ 45.769049] R13: 00007ffccca69a50 R14: 00007ffccca69a80 R15: 00007ffccca69de0 [ 45.769648] [ 45.769847] [ 45.769992] Allocated by task 212: [ 45.770299] kasan_save_stack+0x22/0x50 [ 45.770650] kasan_set_track+0x25/0x30 [ 45.770991] __kasan_slab_alloc+0x59/0x70 [ 45.771366] kmem_cache_alloc+0x16b/0x370 [ 45.771727] vm_area_dup+0x20/0x160 [ 45.772037] __split_vma+0x170/0x950 [ 45.772377] split_vma+0xc6/0x110 [ 45.772684] mprotect_fixup+0x8d2/0xb30 [ 45.773037] do_mprotect_pkey+0x87e/0xd40 [ 45.773443] __x64_sys_mprotect+0x78/0xc0 [ 45.773795] do_syscall_64+0x3f/0x90 [ 45.774108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.774538] [ 45.774686] Freed by task 212: [ 45.774958] kasan_save_stack+0x22/0x50 [ 45.775328] kasan_set_track+0x25/0x30 [ 45.775661] kasan_save_free_info+0x2b/0x50 [ 45.776023] __kasan_slab_free+0x10a/0x190 [ 45.776408] kmem_cache_free+0x10d/0x4d0 [ 45.776750] rcu_core+0x8c8/0x2860 [ 45.777051] __do_softirq+0x1b7/0x7d4 [ 45.777386] [ 45.777537] Last potentially related work creation: [ 45.777938] kasan_save_stack+0x22/0x50 [ 45.778293] __kasan_record_aux_stack+0x8e/0xa0 [ 45.778691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.779129] remove_vma+0x139/0x170 [ 45.779443] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.779832] do_vmi_munmap+0x1f1/0x2b0 [ 45.780156] __vm_munmap+0x138/0x3a0 [ 45.780487] __x64_sys_munmap+0x59/0x80 [ 45.780829] do_syscall_64+0x3f/0x90 [ 45.781143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.781601] [ 45.781750] Second to last potentially related work creation: [ 45.782227] kasan_save_stack+0x22/0x50 [ 45.782583] __kasan_record_aux_stack+0x8e/0xa0 [ 45.782979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.783446] remove_vma+0x139/0x170 [ 45.783752] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.784125] do_vmi_munmap+0x1f1/0x2b0 [ 45.784474] mmap_region+0x1f9/0x2660 [ 45.784798] do_mmap+0x854/0xf00 [ 45.785093] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.785439] ksys_mmap_pgoff+0x3af/0x500 [ 45.785781] do_syscall_64+0x3f/0x90 [ 45.786098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.786564] [ 45.786712] The buggy address belongs to the object at ffff88800ea51d98 [ 45.786712] which belongs to the cache vm_area_struct of size 168 [ 45.787748] The buggy address is located 88 bytes inside of [ 45.787748] freed 168-byte region [ffff88800ea51d98, ffff88800ea51e40) [ 45.788739] [ 45.788888] The buggy address belongs to the physical page: [ 45.789347] page:000000007dc537ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea51 [ 45.790090] memcg:ffff88800e667501 [ 45.790393] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.790875] page_type: 0xffffffff() [ 45.791197] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 45.791932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e667501 [ 45.792564] page dumped because: kasan: bad access detected [ 45.793012] [ 45.793158] Memory state around the buggy address: [ 45.793569] ffff88800ea51c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 45.794156] ffff88800ea51d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 45.794758] >ffff88800ea51d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 45.795374] ^ [ 45.795923] ffff88800ea51e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.796512] ffff88800ea51e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.797091] ================================================================== [ 45.797777] Disabling lock debugging due to kernel taint [ 47.537410] BUG: Bad rss-counter state mm:00000000bf1ac9d7 type:MM_FILEPAGES val:33 [ 47.538199] BUG: Bad rss-counter state mm:00000000bf1ac9d7 type:MM_ANONPAGES val:22 [ 47.998698] BUG: Bad rss-counter state mm:00000000819a9b55 type:MM_FILEPAGES val:33 [ 48.000198] BUG: Bad rss-counter state mm:00000000819a9b55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62747' (ECDSA) to the list of known hosts. 2023/06/20 00:58:16 fuzzer started 2023/06/20 00:58:17 dialing manager at localhost:44161 2023/06/20 00:58:17 checking machine... 2023/06/20 00:58:17 checking revisions... [ 48.746566] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:58:17 testing simple program... [ 48.792301] cgroup: Unknown subsys name 'net' [ 48.838314] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:09 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=0000000000000001 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=00007ffcd8cc92b8 CR3=0000000005482000 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=00007fa3460a05100000555acc015790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100d9e1357 RBX=ffffffff813ad420 RCX=ffff88806cf09b10 RDX=0000000000000002 RSI=ffff88806cf09b08 RDI=ffff88806cf09a80 RBP=ffff88806cf09b08 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800e179b40 R15=ffff88800dc45c38 RIP=ffffffff810bd039 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 00007f7777fff700 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=00007efd485f1000 CR3=000000000c6d2000 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=2036313a38353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a38353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000