syzkaller login: [ 68.941197] BUG: Bad rss-counter state mm:0000000007be058a type:MM_FILEPAGES val:33 [ 68.941926] BUG: Bad rss-counter state mm:0000000007be058a type:MM_ANONPAGES val:22 [ 68.972998] ================================================================== [ 68.973727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.974382] Read of size 8 at addr ffff8880101f2d08 by task sshd/227 [ 68.974956] [ 68.975107] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.975780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.976445] Call Trace: [ 68.976658] [ 68.976992] dump_stack_lvl+0x91/0xf0 [ 68.977395] print_report+0xcc/0x620 [ 68.977725] ? __virt_addr_valid+0x102/0x340 [ 68.978101] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.978569] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.979013] kasan_report+0xbe/0xf0 [ 68.979352] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.979801] vma_interval_tree_remove+0xc75/0xec0 [ 68.980268] vma_prepare+0xc54/0x11a0 [ 68.980606] __split_vma+0x5af/0x950 [ 68.980935] ? __pfx___split_vma+0x10/0x10 [ 68.981299] ? find_held_lock+0x2c/0x110 [ 68.981664] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.982060] ? lock_is_held_type+0x9f/0x120 [ 68.982484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.982920] ? mtree_range_walk+0x632/0x900 [ 68.983305] ? mas_walk+0x5c7/0x7c0 [ 68.983629] do_vmi_munmap+0x1f1/0x2b0 [ 68.983982] mmap_region+0x1f9/0x2660 [ 68.984325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.984686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.985176] ? __pfx_lock_acquire+0x10/0x10 [ 68.985546] ? __pfx_mmap_region+0x10/0x10 [ 68.985917] ? security_mmap_addr+0x7d/0xa0 [ 68.986294] ? get_unmapped_area+0x1f5/0x3f0 [ 68.986693] do_mmap+0x854/0xf00 [ 68.987012] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.987357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.987743] ksys_mmap_pgoff+0x3af/0x500 [ 68.988095] do_syscall_64+0x3f/0x90 [ 68.988446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.988924] RIP: 0033:0x7f671de86d82 [ 68.989237] 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 [ 68.990818] RSP: 002b:00007ffe2de9e3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.991454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f671de86d82 [ 68.992042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f671d2c0000 [ 68.992630] RBP: 00007f671d2c0000 R08: 0000000000000009 R09: 0000000000001000 [ 68.993256] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590abd62980 [ 68.993866] R13: 00007ffe2de9e3e0 R14: 00007ffe2de9e410 R15: 00007ffe2de9e770 [ 68.994507] [ 68.994714] [ 68.994880] Allocated by task 220: [ 68.995176] kasan_save_stack+0x22/0x50 [ 68.995547] kasan_set_track+0x25/0x30 [ 68.995898] __kasan_slab_alloc+0x59/0x70 [ 68.996273] kmem_cache_alloc+0x16b/0x370 [ 68.996638] vm_area_dup+0x20/0x160 [ 68.996962] __split_vma+0x170/0x950 [ 68.997285] split_vma+0xc6/0x110 [ 68.997587] mprotect_fixup+0x8d2/0xb30 [ 68.997946] do_mprotect_pkey+0x87e/0xd40 [ 68.998315] __x64_sys_mprotect+0x78/0xc0 [ 68.998697] do_syscall_64+0x3f/0x90 [ 68.999038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.999489] [ 68.999639] Freed by task 220: [ 68.999927] kasan_save_stack+0x22/0x50 [ 69.000280] kasan_set_track+0x25/0x30 [ 69.000617] kasan_save_free_info+0x2b/0x50 [ 69.001005] __kasan_slab_free+0x10a/0x190 [ 69.001369] kmem_cache_free+0x10d/0x4d0 [ 69.001718] rcu_core+0x8c8/0x2860 [ 69.002030] __do_softirq+0x1b7/0x7d4 [ 69.002364] [ 69.002589] Last potentially related work creation: [ 69.002912] kasan_save_stack+0x22/0x50 [ 69.003189] __kasan_record_aux_stack+0x8e/0xa0 [ 69.003499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.003862] remove_vma+0x139/0x170 [ 69.004111] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.004414] do_vmi_munmap+0x1f1/0x2b0 [ 69.004685] __vm_munmap+0x138/0x3a0 [ 69.004938] __x64_sys_munmap+0x59/0x80 [ 69.005212] do_syscall_64+0x3f/0x90 [ 69.005476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.005838] [ 69.005956] The buggy address belongs to the object at ffff8880101f2cb0 [ 69.005956] which belongs to the cache vm_area_struct of size 168 [ 69.006788] The buggy address is located 88 bytes inside of [ 69.006788] freed 168-byte region [ffff8880101f2cb0, ffff8880101f2d58) [ 69.007556] [ 69.007672] The buggy address belongs to the physical page: [ 69.008043] page:000000004c32e141 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101f2 [ 69.008642] memcg:ffff88800f5d8601 [ 69.008880] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.009237] page_type: 0xffffffff() [ 69.009484] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.009993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d8601 [ 69.010504] page dumped because: kasan: bad access detected [ 69.010867] [ 69.011114] Memory state around the buggy address: [ 69.011474] ffff8880101f2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.012002] ffff8880101f2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.012554] >ffff8880101f2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.013096] ^ [ 69.013365] ffff8880101f2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.013884] ffff8880101f2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.014514] ================================================================== [ 69.015402] Disabling lock debugging due to kernel taint [ 70.954120] BUG: Bad rss-counter state mm:00000000187e0c56 type:MM_FILEPAGES val:33 [ 70.954827] BUG: Bad rss-counter state mm:00000000187e0c56 type:MM_ANONPAGES val:22 [ 71.358901] BUG: Bad rss-counter state mm:00000000dea83ea5 type:MM_FILEPAGES val:33 [ 71.359612] BUG: Bad rss-counter state mm:00000000dea83ea5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33693' (ECDSA) to the list of known hosts. 2023/06/21 09:20:12 fuzzer started 2023/06/21 09:20:13 dialing manager at localhost:36067 2023/06/21 09:20:13 checking machine... 2023/06/21 09:20:13 checking revisions... [ 71.907542] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:20:13 testing simple program... [ 71.939819] cgroup: Unknown subsys name 'net' [ 71.985170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:12 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dfdb0c RCX=ffffffff8180803a RDX=0000000000000000 RSI=ffffffff861386ee RDI=ffffffff85dfdb08 RBP=ffffffff85dfdb08 RSP=ffff88800e6d77c0 R8 =ffffffff861386ee R9 =ffff88800e6d78b8 R10=0000000000038001 R11=0000000000020c51 R12=ffffffff85dfdb10 R13=ffffffff85dfdb08 R14=ffffffff85dfdb08 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f472dc0d900 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=00007f472e1c50b0 CR3=000000000b868000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff1100d9e1368 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88806cf09bd0 RBP=ffffffff813782f8 RSP=ffff88806cf09b40 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed1001f34272 R11=0000000000000000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800f9a1410 RIP=ffffffff813ad6c9 RFL=00000212 [----A--] 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 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=00007f472dba2000 CR3=0000000019f3a000 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=2032313a30323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a30323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000