syzkaller login: [ 30.713164] BUG: Bad rss-counter state mm:0000000099caf777 type:MM_FILEPAGES val:33 [ 30.714151] BUG: Bad rss-counter state mm:0000000099caf777 type:MM_ANONPAGES val:22 [ 30.754192] ================================================================== [ 30.755091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.755994] Read of size 8 at addr ffff8880159aea50 by task sshd/220 [ 30.756754] [ 30.756967] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.757824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758773] Call Trace: [ 30.759086] [ 30.759370] dump_stack_lvl+0x91/0xf0 [ 30.759847] print_report+0xcc/0x620 [ 30.760321] ? __virt_addr_valid+0x102/0x340 [ 30.760855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762084] kasan_report+0xbe/0xf0 [ 30.762549] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763148] vma_interval_tree_remove+0xc75/0xec0 [ 30.763736] vma_prepare+0xc54/0x11a0 [ 30.764208] __split_vma+0x5af/0x950 [ 30.764667] ? __pfx___split_vma+0x10/0x10 [ 30.765191] ? find_held_lock+0x2c/0x110 [ 30.765699] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766246] ? lock_is_held_type+0x9f/0x120 [ 30.766766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.767353] ? mtree_range_walk+0x632/0x900 [ 30.767890] ? mas_walk+0x5c7/0x7c0 [ 30.768354] do_vmi_munmap+0x1f1/0x2b0 [ 30.768831] mmap_region+0x1f9/0x2660 [ 30.769316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.769814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.770504] ? __pfx_lock_acquire+0x10/0x10 [ 30.771020] ? __pfx_mmap_region+0x10/0x10 [ 30.771533] ? security_mmap_addr+0x7d/0xa0 [ 30.772049] ? get_unmapped_area+0x1f5/0x3f0 [ 30.772584] do_mmap+0x854/0xf00 [ 30.773013] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.773500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.774070] ksys_mmap_pgoff+0x3af/0x500 [ 30.774566] do_syscall_64+0x3f/0x90 [ 30.775034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775677] RIP: 0033:0x7ffaa2235d82 [ 30.776136] 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 [ 30.778209] RSP: 002b:00007ffc3caff248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779090] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffaa2235d82 [ 30.779914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffaa166f000 [ 30.780734] RBP: 00007ffaa166f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.781674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9ec7a9ec0 [ 30.782498] R13: 00007ffc3caff260 R14: 00007ffc3caff290 R15: 00007ffc3caff5f0 [ 30.783336] [ 30.783623] [ 30.783854] Allocated by task 213: [ 30.784271] kasan_save_stack+0x22/0x50 [ 30.784765] kasan_set_track+0x25/0x30 [ 30.785260] __kasan_slab_alloc+0x59/0x70 [ 30.785771] kmem_cache_alloc+0x16b/0x370 [ 30.786274] vm_area_dup+0x20/0x160 [ 30.786714] __split_vma+0x170/0x950 [ 30.787166] split_vma+0xc6/0x110 [ 30.787595] mprotect_fixup+0x8d2/0xb30 [ 30.788082] do_mprotect_pkey+0x87e/0xd40 [ 30.788593] __x64_sys_mprotect+0x78/0xc0 [ 30.789097] do_syscall_64+0x3f/0x90 [ 30.789572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790196] [ 30.790406] Freed by task 213: [ 30.790788] kasan_save_stack+0x22/0x50 [ 30.791277] kasan_set_track+0x25/0x30 [ 30.791758] kasan_save_free_info+0x2b/0x50 [ 30.792281] __kasan_slab_free+0x10a/0x190 [ 30.792802] kmem_cache_free+0x10d/0x4d0 [ 30.793306] rcu_core+0x8c8/0x2860 [ 30.793739] __do_softirq+0x1b7/0x7d4 [ 30.794204] [ 30.794414] Last potentially related work creation: [ 30.794978] kasan_save_stack+0x22/0x50 [ 30.795467] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796647] remove_vma+0x139/0x170 [ 30.797082] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797640] do_vmi_munmap+0x1f1/0x2b0 [ 30.798115] __vm_munmap+0x138/0x3a0 [ 30.798572] __x64_sys_munmap+0x59/0x80 [ 30.799055] do_syscall_64+0x3f/0x90 [ 30.799515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800142] [ 30.800352] The buggy address belongs to the object at ffff8880159ae9f8 [ 30.800352] which belongs to the cache vm_area_struct of size 168 [ 30.801774] The buggy address is located 88 bytes inside of [ 30.801774] freed 168-byte region [ffff8880159ae9f8, ffff8880159aeaa0) [ 30.803280] [ 30.803494] The buggy address belongs to the physical page: [ 30.804160] page:000000004816cbda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ae [ 30.805279] memcg:ffff88800dc2a101 [ 30.805708] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806360] page_type: 0xffffffff() [ 30.806816] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.807737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc2a101 [ 30.808647] page dumped because: kasan: bad access detected [ 30.809309] [ 30.809512] Memory state around the buggy address: [ 30.810075] ffff8880159ae900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.810903] ffff8880159ae980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.811739] >ffff8880159aea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.812563] ^ [ 30.813246] ffff8880159aea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.814079] ffff8880159aeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.814899] ================================================================== [ 30.815923] Disabling lock debugging due to kernel taint [ 33.254773] BUG: Bad rss-counter state mm:000000004f1b01fb type:MM_FILEPAGES val:33 [ 33.255701] BUG: Bad rss-counter state mm:000000004f1b01fb type:MM_ANONPAGES val:22 [ 33.731715] BUG: Bad rss-counter state mm:00000000ed4c03bf type:MM_FILEPAGES val:33 [ 33.732733] BUG: Bad rss-counter state mm:00000000ed4c03bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58908' (ECDSA) to the list of known hosts. 2023/06/21 07:39:52 fuzzer started 2023/06/21 07:39:52 dialing manager at localhost:36067 2023/06/21 07:39:52 checking machine... 2023/06/21 07:39:52 checking revisions... [ 34.394046] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:39:52 testing simple program... [ 34.436383] cgroup: Unknown subsys name 'net' [ 34.479669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:52 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888016fa4d10 RCX=1ffffffff0ba7c92 RDX=dffffc0000000000 RSI=00000000000000f0 RDI=ffff888016fa4d10 RBP=ffff888008d9fd38 RSP=ffff888008d9fcd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff888016fa4d10 R13=ffff888008d90000 R14=ffffffff813782f8 R15=ffff888016fa4d90 RIP=ffffffff812c9338 RFL=00000206 [-----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 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=00007f2643bfa618 CR3=000000000c9cc000 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=2032353a39333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a39333a3730203132 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863dde7f RBX=0000000000000001 RCX=ffffffff863dde7e RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c7bbcf RBP=ffff8880191cf3c8 RSP=ffff8880191cf300 R8 =ffffffff863dde82 R9 =ffff8880191cf3b0 R10=0000000000038001 R11=0000000000091ae9 R12=ffff8880191cf3d0 R13=ffff8880191cf3b8 R14=ffff8880191cf830 R15=ffff8880191cf370 RIP=ffffffff81130b7e RFL=00000217 [----APC] 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 00007f2643643900 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=00007fd3d460e910 CR3=000000000f26a000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000