syzkaller login: [ 39.805677] BUG: Bad rss-counter state mm:00000000e31d4da3 type:MM_FILEPAGES val:33 [ 39.807114] BUG: Bad rss-counter state mm:00000000e31d4da3 type:MM_ANONPAGES val:22 [ 39.910449] ================================================================== [ 39.911475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.912609] Read of size 8 at addr ffff88800dfd6310 by task sshd/221 [ 39.913487] [ 39.913731] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.914685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.915767] Call Trace: [ 39.916124] <TASK> [ 39.916442] dump_stack_lvl+0x91/0xf0 [ 39.916997] print_report+0xcc/0x620 [ 39.917552] ? __virt_addr_valid+0x102/0x340 [ 39.918179] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.918875] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.919570] kasan_report+0xbe/0xf0 [ 39.920103] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.920803] vma_interval_tree_remove+0xc75/0xec0 [ 39.921493] vma_prepare+0xc54/0x11a0 [ 39.922025] __split_vma+0x5af/0x950 [ 39.922554] ? __pfx___split_vma+0x10/0x10 [ 39.923142] ? find_held_lock+0x2c/0x110 [ 39.923727] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.924356] ? lock_is_held_type+0x9f/0x120 [ 39.924963] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.925654] ? mtree_range_walk+0x632/0x900 [ 39.926275] ? mas_walk+0x5c7/0x7c0 [ 39.926808] do_vmi_munmap+0x1f1/0x2b0 [ 39.927363] mmap_region+0x1f9/0x2660 [ 39.927912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.928489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.929380] ? __pfx_lock_acquire+0x10/0x10 [ 39.930033] ? __pfx_mmap_region+0x10/0x10 [ 39.930676] ? security_mmap_addr+0x7d/0xa0 [ 39.931322] ? get_unmapped_area+0x1f5/0x3f0 [ 39.931942] do_mmap+0x854/0xf00 [ 39.932394] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.932970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.933663] ksys_mmap_pgoff+0x3af/0x500 [ 39.934290] do_syscall_64+0x3f/0x90 [ 39.934890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.935687] RIP: 0033:0x7fb959a31d82 [ 39.936255] 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 [ 39.938992] RSP: 002b:00007ffc664b85c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.940142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb959a31d82 [ 39.941236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb958e6b000 [ 39.942302] RBP: 00007fb958e6b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.943375] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605141e2ec0 [ 39.944438] R13: 00007ffc664b85e0 R14: 00007ffc664b8610 R15: 00007ffc664b8970 [ 39.945512] </TASK> [ 39.945872] [ 39.946132] Allocated by task 214: [ 39.946683] kasan_save_stack+0x22/0x50 [ 39.947318] kasan_set_track+0x25/0x30 [ 39.947918] __kasan_slab_alloc+0x59/0x70 [ 39.948564] kmem_cache_alloc+0x16b/0x370 [ 39.949200] vm_area_dup+0x20/0x160 [ 39.949785] __split_vma+0x170/0x950 [ 39.950360] split_vma+0xc6/0x110 [ 39.950903] mprotect_fixup+0x8d2/0xb30 [ 39.951522] do_mprotect_pkey+0x87e/0xd40 [ 39.952162] __x64_sys_mprotect+0x78/0xc0 [ 39.952822] do_syscall_64+0x3f/0x90 [ 39.953429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.954235] [ 39.954497] Freed by task 214: [ 39.954979] kasan_save_stack+0x22/0x50 [ 39.955594] kasan_set_track+0x25/0x30 [ 39.956218] kasan_save_free_info+0x2b/0x50 [ 39.956880] __kasan_slab_free+0x10a/0x190 [ 39.957553] kmem_cache_free+0x10d/0x4d0 [ 39.958184] rcu_core+0x8c8/0x2860 [ 39.958745] __do_softirq+0x1b7/0x7d4 [ 39.959333] [ 39.959596] Last potentially related work creation: [ 39.960327] kasan_save_stack+0x22/0x50 [ 39.960961] __kasan_record_aux_stack+0x8e/0xa0 [ 39.961697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.962510] remove_vma+0x139/0x170 [ 39.963073] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.963773] do_vmi_munmap+0x1f1/0x2b0 [ 39.964376] __vm_munmap+0x138/0x3a0 [ 39.964953] __x64_sys_munmap+0x59/0x80 [ 39.965587] do_syscall_64+0x3f/0x90 [ 39.966172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.966965] [ 39.967228] Second to last potentially related work creation: [ 39.968082] kasan_save_stack+0x22/0x50 [ 39.968712] __kasan_record_aux_stack+0x8e/0xa0 [ 39.969456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.970256] remove_vma+0x139/0x170 [ 39.970820] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.971524] do_vmi_munmap+0x1f1/0x2b0 [ 39.972122] mmap_region+0x1f9/0x2660 [ 39.972718] do_mmap+0x854/0xf00 [ 39.973260] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.973867] ksys_mmap_pgoff+0x3af/0x500 [ 39.974486] do_syscall_64+0x3f/0x90 [ 39.975076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.975879] [ 39.976143] The buggy address belongs to the object at ffff88800dfd62b8 [ 39.976143] which belongs to the cache vm_area_struct of size 168 [ 39.978015] The buggy address is located 88 bytes inside of [ 39.978015] freed 168-byte region [ffff88800dfd62b8, ffff88800dfd6360) [ 39.979804] [ 39.980068] The buggy address belongs to the physical page: [ 39.980911] page:00000000798108cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfd6 [ 39.982281] memcg:ffff88800d679001 [ 39.982813] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.983699] page_type: 0xffffffff() [ 39.984253] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.985409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d679001 [ 39.986550] page dumped because: kasan: bad access detected [ 39.987375] [ 39.987634] Memory state around the buggy address: [ 39.988356] ffff88800dfd6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.989444] ffff88800dfd6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.990529] >ffff88800dfd6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.991613] ^ [ 39.992197] ffff88800dfd6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.993281] ffff88800dfd6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.994346] ================================================================== [ 39.995739] Disabling lock debugging due to kernel taint [ 41.913433] BUG: Bad rss-counter state mm:000000004f59293c type:MM_FILEPAGES val:33 [ 41.914362] BUG: Bad rss-counter state mm:000000004f59293c type:MM_ANONPAGES val:22 [ 42.361179] BUG: Bad rss-counter state mm:00000000a9459c35 type:MM_FILEPAGES val:33 [ 42.363503] BUG: Bad rss-counter state mm:00000000a9459c35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4567' (ECDSA) to the list of known hosts. 2023/06/19 18:16:33 fuzzer started 2023/06/19 18:16:33 dialing manager at localhost:44161 2023/06/19 18:16:33 checking machine... 2023/06/19 18:16:33 checking revisions... [ 43.112964] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:16:33 testing simple program... [ 43.169338] cgroup: Unknown subsys name 'net' [ 43.223864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1355 RSI=ffff88806ce09fe0 RDI=ffff88806ce09aa8 RBP=ffff88806ce09fe0 RSP=ffff88806ce099f0 R8 =ffffffff864b4f3c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 00007fa14b52b900 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=00007ffcf09a4000 CR3=0000000018eac000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c58400 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=00007f3fab6dc380 CR3=0000000018c6e000 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=2032333a36313a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a36313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000