syzkaller login: [ 44.328509] BUG: Bad rss-counter state mm:00000000796074fa type:MM_FILEPAGES val:33 [ 44.329693] BUG: Bad rss-counter state mm:00000000796074fa type:MM_ANONPAGES val:22 [ 44.439263] ================================================================== [ 44.439959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.440694] Read of size 8 at addr ffff88801022c228 by task sshd/226 [ 44.441275] [ 44.441441] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.442098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.442850] Call Trace: [ 44.443091] [ 44.443309] dump_stack_lvl+0x91/0xf0 [ 44.443682] print_report+0xcc/0x620 [ 44.444052] ? __virt_addr_valid+0x102/0x340 [ 44.444501] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.444974] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.445445] kasan_report+0xbe/0xf0 [ 44.445809] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.446285] vma_interval_tree_remove+0xc75/0xec0 [ 44.446742] vma_prepare+0xc54/0x11a0 [ 44.447112] __split_vma+0x5af/0x950 [ 44.447471] ? __pfx___split_vma+0x10/0x10 [ 44.447871] ? find_held_lock+0x2c/0x110 [ 44.448268] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.448719] ? lock_is_held_type+0x9f/0x120 [ 44.449133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.449601] ? mtree_range_walk+0x632/0x900 [ 44.450024] ? mas_walk+0x5c7/0x7c0 [ 44.450386] do_vmi_munmap+0x1f1/0x2b0 [ 44.450761] mmap_region+0x1f9/0x2660 [ 44.451134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.451525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.452073] ? __pfx_lock_acquire+0x10/0x10 [ 44.452506] ? __pfx_mmap_region+0x10/0x10 [ 44.452916] ? security_mmap_addr+0x7d/0xa0 [ 44.453327] ? get_unmapped_area+0x1f5/0x3f0 [ 44.453748] do_mmap+0x854/0xf00 [ 44.454084] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.454464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.454897] ksys_mmap_pgoff+0x3af/0x500 [ 44.455291] do_syscall_64+0x3f/0x90 [ 44.455655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.456153] RIP: 0033:0x7fcfb8b31d82 [ 44.456514] 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 [ 44.458147] RSP: 002b:00007ffc9fa917e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.458861] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcfb8b31d82 [ 44.459516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcfb7f6b000 [ 44.460167] RBP: 00007fcfb7f6b000 R08: 0000000000000009 R09: 0000000000001000 [ 44.460837] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559fcfe2ec0 [ 44.461482] R13: 00007ffc9fa91800 R14: 00007ffc9fa91830 R15: 00007ffc9fa91b90 [ 44.462150] [ 44.462373] [ 44.462538] Allocated by task 219: [ 44.462867] kasan_save_stack+0x22/0x50 [ 44.463251] kasan_set_track+0x25/0x30 [ 44.463631] __kasan_slab_alloc+0x59/0x70 [ 44.464032] kmem_cache_alloc+0x16b/0x370 [ 44.464445] vm_area_dup+0x20/0x160 [ 44.464796] __split_vma+0x170/0x950 [ 44.465156] split_vma+0xc6/0x110 [ 44.465497] mprotect_fixup+0x8d2/0xb30 [ 44.465883] do_mprotect_pkey+0x87e/0xd40 [ 44.466283] __x64_sys_mprotect+0x78/0xc0 [ 44.466680] do_syscall_64+0x3f/0x90 [ 44.467044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.467533] [ 44.467696] Freed by task 219: [ 44.467999] kasan_save_stack+0x22/0x50 [ 44.468385] kasan_set_track+0x25/0x30 [ 44.468783] kasan_save_free_info+0x2b/0x50 [ 44.469194] __kasan_slab_free+0x10a/0x190 [ 44.469603] kmem_cache_free+0x10d/0x4d0 [ 44.469993] rcu_core+0x8c8/0x2860 [ 44.470337] __do_softirq+0x1b7/0x7d4 [ 44.470701] [ 44.470867] Last potentially related work creation: [ 44.471315] kasan_save_stack+0x22/0x50 [ 44.471698] __kasan_record_aux_stack+0x8e/0xa0 [ 44.472135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.472642] remove_vma+0x139/0x170 [ 44.472988] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.473419] do_vmi_munmap+0x1f1/0x2b0 [ 44.473793] __vm_munmap+0x138/0x3a0 [ 44.474151] __x64_sys_munmap+0x59/0x80 [ 44.474531] do_syscall_64+0x3f/0x90 [ 44.474894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.475386] [ 44.475554] The buggy address belongs to the object at ffff88801022c1d0 [ 44.475554] which belongs to the cache vm_area_struct of size 168 [ 44.476790] The buggy address is located 88 bytes inside of [ 44.476790] freed 168-byte region [ffff88801022c1d0, ffff88801022c278) [ 44.477881] [ 44.478047] The buggy address belongs to the physical page: [ 44.478561] page:0000000065794236 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022c [ 44.479400] memcg:ffff8880180bd801 [ 44.479726] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.480219] page_type: 0xffffffff() [ 44.480582] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.481286] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180bd801 [ 44.481980] page dumped because: kasan: bad access detected [ 44.482484] [ 44.482650] Memory state around the buggy address: [ 44.483095] ffff88801022c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.483755] ffff88801022c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.484414] >ffff88801022c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.485084] ^ [ 44.485508] ffff88801022c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.486166] ffff88801022c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.486821] ================================================================== [ 44.487516] Disabling lock debugging due to kernel taint [ 45.981921] BUG: Bad rss-counter state mm:0000000054b29b76 type:MM_FILEPAGES val:33 [ 45.982699] BUG: Bad rss-counter state mm:0000000054b29b76 type:MM_ANONPAGES val:22 [ 46.352438] BUG: Bad rss-counter state mm:0000000085175347 type:MM_FILEPAGES val:33 [ 46.353554] BUG: Bad rss-counter state mm:0000000085175347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61462' (ECDSA) to the list of known hosts. 2023/06/20 02:41:25 fuzzer started 2023/06/20 02:41:25 dialing manager at localhost:44161 2023/06/20 02:41:25 checking machine... 2023/06/20 02:41:25 checking revisions... [ 47.067807] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:41:25 testing simple program... [ 47.122897] cgroup: Unknown subsys name 'net' [ 47.174600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:19 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880191b4500 RCX=0000000000000000 RDX=ffff8880090651c0 RSI=ffffffff8363829d RDI=ffffffff84d65430 RBP=ffff88800fd97e60 RSP=ffff88800fd97b18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff83869cf0 R13=0000000000000000 R14=0000000000001000 R15=ffff88800fd97ea4 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007f95d0b91900 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=000055ba59a2b954 CR3=000000000f4ae000 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=00007feccb08fac0 CR3=000000000ce2a000 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=2034323a31343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000