syzkaller login: [ 44.511738] BUG: Bad rss-counter state mm:00000000cbb68168 type:MM_FILEPAGES val:33 [ 44.513632] BUG: Bad rss-counter state mm:00000000cbb68168 type:MM_ANONPAGES val:22 [ 44.687251] ================================================================== [ 44.688223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.689235] Read of size 8 at addr ffff88800e54e4e0 by task sshd/221 [ 44.690204] [ 44.690441] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.691402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.692452] Call Trace: [ 44.692797] [ 44.693104] dump_stack_lvl+0x91/0xf0 [ 44.693625] print_report+0xcc/0x620 [ 44.694151] ? __virt_addr_valid+0x102/0x340 [ 44.694751] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.695431] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.696092] kasan_report+0xbe/0xf0 [ 44.696605] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.697271] vma_interval_tree_remove+0xc75/0xec0 [ 44.697923] vma_prepare+0xc54/0x11a0 [ 44.698436] __split_vma+0x5af/0x950 [ 44.698946] ? __pfx___split_vma+0x10/0x10 [ 44.699520] ? find_held_lock+0x2c/0x110 [ 44.700085] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.700693] ? lock_is_held_type+0x9f/0x120 [ 44.701277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.701918] ? mtree_range_walk+0x632/0x900 [ 44.702503] ? mas_walk+0x5c7/0x7c0 [ 44.703002] do_vmi_munmap+0x1f1/0x2b0 [ 44.703544] mmap_region+0x1f9/0x2660 [ 44.704061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.704606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.705369] ? __pfx_lock_acquire+0x10/0x10 [ 44.705947] ? __pfx_mmap_region+0x10/0x10 [ 44.706514] ? security_mmap_addr+0x7d/0xa0 [ 44.707085] ? get_unmapped_area+0x1f5/0x3f0 [ 44.707687] do_mmap+0x854/0xf00 [ 44.708157] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.708692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.709298] ksys_mmap_pgoff+0x3af/0x500 [ 44.709845] do_syscall_64+0x3f/0x90 [ 44.710350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.711041] RIP: 0033:0x7f5f7ef69d82 [ 44.711547] 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 [ 44.713826] RSP: 002b:00007ffc3b635858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.714784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f7ef69d82 [ 44.715697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f7e3a3000 [ 44.716596] RBP: 00007f5f7e3a3000 R08: 0000000000000009 R09: 0000000000001000 [ 44.717501] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ceb75dfec0 [ 44.718400] R13: 00007ffc3b635870 R14: 00007ffc3b6358a0 R15: 00007ffc3b635c00 [ 44.719327] [ 44.719642] [ 44.719871] Allocated by task 214: [ 44.720327] kasan_save_stack+0x22/0x50 [ 44.720873] kasan_set_track+0x25/0x30 [ 44.721405] __kasan_slab_alloc+0x59/0x70 [ 44.721968] kmem_cache_alloc+0x16b/0x370 [ 44.722518] vm_area_dup+0x20/0x160 [ 44.722999] __split_vma+0x170/0x950 [ 44.723497] split_vma+0xc6/0x110 [ 44.723959] mprotect_fixup+0x8d2/0xb30 [ 44.724483] do_mprotect_pkey+0x87e/0xd40 [ 44.725028] __x64_sys_mprotect+0x78/0xc0 [ 44.725573] do_syscall_64+0x3f/0x90 [ 44.726073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.726747] [ 44.726973] Freed by task 214: [ 44.727386] kasan_save_stack+0x22/0x50 [ 44.727923] kasan_set_track+0x25/0x30 [ 44.728441] kasan_save_free_info+0x2b/0x50 [ 44.728997] __kasan_slab_free+0x10a/0x190 [ 44.729578] kmem_cache_free+0x10d/0x4d0 [ 44.730099] rcu_core+0x8c8/0x2860 [ 44.730557] __do_softirq+0x1b7/0x7d4 [ 44.731044] [ 44.731276] Last potentially related work creation: [ 44.731882] kasan_save_stack+0x22/0x50 [ 44.732400] __kasan_record_aux_stack+0x8e/0xa0 [ 44.732987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.733644] remove_vma+0x139/0x170 [ 44.734105] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.734671] do_vmi_munmap+0x1f1/0x2b0 [ 44.735175] __vm_munmap+0x138/0x3a0 [ 44.735652] __x64_sys_munmap+0x59/0x80 [ 44.736156] do_syscall_64+0x3f/0x90 [ 44.736634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.737286] [ 44.737506] The buggy address belongs to the object at ffff88800e54e488 [ 44.737506] which belongs to the cache vm_area_struct of size 168 [ 44.739006] The buggy address is located 88 bytes inside of [ 44.739006] freed 168-byte region [ffff88800e54e488, ffff88800e54e530) [ 44.740472] [ 44.740696] The buggy address belongs to the physical page: [ 44.741375] page:00000000b271e2c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe54e [ 44.742492] memcg:ffff88800c9ec001 [ 44.742934] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.743656] page_type: 0xffffffff() [ 44.744119] raw: 0100000000000200 ffff88800879fc80 ffffea0000259a40 dead000000000005 [ 44.745063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9ec001 [ 44.745995] page dumped because: kasan: bad access detected [ 44.746673] [ 44.746891] Memory state around the buggy address: [ 44.747500] ffff88800e54e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.748377] ffff88800e54e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 44.749265] >ffff88800e54e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.750138] ^ [ 44.750913] ffff88800e54e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 44.751801] ffff88800e54e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.752674] ================================================================== [ 44.753683] Disabling lock debugging due to kernel taint [ 46.599449] BUG: Bad rss-counter state mm:0000000011b8e5c9 type:MM_FILEPAGES val:33 [ 46.600372] BUG: Bad rss-counter state mm:0000000011b8e5c9 type:MM_ANONPAGES val:22 [ 46.982307] BUG: Bad rss-counter state mm:00000000ecab793c type:MM_FILEPAGES val:33 [ 46.983028] BUG: Bad rss-counter state mm:00000000ecab793c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38423' (ECDSA) to the list of known hosts. 2023/06/19 13:05:52 fuzzer started 2023/06/19 13:05:53 dialing manager at localhost:44161 2023/06/19 13:05:53 checking machine... 2023/06/19 13:05:53 checking revisions... [ 47.673467] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:05:53 testing simple program... [ 47.729978] cgroup: Unknown subsys name 'net' [ 47.770350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:05:46 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff8880165f3000 RCX=0000000000000000 RDX=ffff88800ea11b40 RSI=ffffffff83653c11 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888009c0f800 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880165f3248 R13=ffff888019221740 R14=ffff8880165f3579 R15=ffff8880165f3600 RIP=ffffffff8450bdca RFL=00000293 [--S-A-C] 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 00007f070e9b2900 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=00007ffd4c0d9000 CR3=000000001a884000 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=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=00007f446ba49180 CR3=000000000c546000 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=2032353a35303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000