syzkaller login: [ 60.526695] BUG: Bad rss-counter state mm:00000000683a64bf type:MM_FILEPAGES val:33 [ 60.529208] BUG: Bad rss-counter state mm:00000000683a64bf type:MM_ANONPAGES val:22 [ 60.700682] ================================================================== [ 60.701596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.702591] Read of size 8 at addr ffff88800ea1e6b0 by task sshd/220 [ 60.703701] [ 60.703920] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.704818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.705816] Call Trace: [ 60.706135] [ 60.706430] dump_stack_lvl+0x91/0xf0 [ 60.706925] print_report+0xcc/0x620 [ 60.707435] ? __virt_addr_valid+0x102/0x340 [ 60.707992] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.708627] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.709260] kasan_report+0xbe/0xf0 [ 60.709748] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.710383] vma_interval_tree_remove+0xc75/0xec0 [ 60.711001] vma_prepare+0xc54/0x11a0 [ 60.711508] __split_vma+0x5af/0x950 [ 60.711982] ? __pfx___split_vma+0x10/0x10 [ 60.712535] ? find_held_lock+0x2c/0x110 [ 60.713069] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.713649] ? lock_is_held_type+0x9f/0x120 [ 60.714198] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.714827] ? mtree_range_walk+0x632/0x900 [ 60.715411] ? mas_walk+0x5c7/0x7c0 [ 60.715904] do_vmi_munmap+0x1f1/0x2b0 [ 60.716413] mmap_region+0x1f9/0x2660 [ 60.716924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.717449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.718175] ? __pfx_lock_acquire+0x10/0x10 [ 60.718719] ? __pfx_mmap_region+0x10/0x10 [ 60.719252] ? security_mmap_addr+0x7d/0xa0 [ 60.719810] ? get_unmapped_area+0x1f5/0x3f0 [ 60.720380] do_mmap+0x854/0xf00 [ 60.720842] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.721344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.721921] ksys_mmap_pgoff+0x3af/0x500 [ 60.722456] do_syscall_64+0x3f/0x90 [ 60.722943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.723618] RIP: 0033:0x7eff319d7d82 [ 60.724076] 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 [ 60.726288] RSP: 002b:00007ffde93459f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.727210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff319d7d82 [ 60.728089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff30e11000 [ 60.728968] RBP: 00007eff30e11000 R08: 0000000000000009 R09: 0000000000001000 [ 60.729826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b29d964d90 [ 60.730681] R13: 00007ffde9345a10 R14: 00007ffde9345a40 R15: 00007ffde9345da0 [ 60.731566] [ 60.731857] [ 60.732077] Allocated by task 213: [ 60.732527] kasan_save_stack+0x22/0x50 [ 60.733049] kasan_set_track+0x25/0x30 [ 60.733555] __kasan_slab_alloc+0x59/0x70 [ 60.734075] kmem_cache_alloc+0x16b/0x370 [ 60.734604] vm_area_dup+0x20/0x160 [ 60.735059] __split_vma+0x170/0x950 [ 60.735554] split_vma+0xc6/0x110 [ 60.735995] mprotect_fixup+0x8d2/0xb30 [ 60.736523] do_mprotect_pkey+0x87e/0xd40 [ 60.737069] __x64_sys_mprotect+0x78/0xc0 [ 60.737610] do_syscall_64+0x3f/0x90 [ 60.738102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.738764] [ 60.738983] Freed by task 13: [ 60.739383] kasan_save_stack+0x22/0x50 [ 60.739905] kasan_set_track+0x25/0x30 [ 60.740424] kasan_save_free_info+0x2b/0x50 [ 60.740967] __kasan_slab_free+0x10a/0x190 [ 60.741515] kmem_cache_free+0x10d/0x4d0 [ 60.742023] rcu_core+0x8c8/0x2860 [ 60.742476] __do_softirq+0x1b7/0x7d4 [ 60.742954] [ 60.743169] Last potentially related work creation: [ 60.743944] kasan_save_stack+0x22/0x50 [ 60.744467] __kasan_record_aux_stack+0x8e/0xa0 [ 60.745059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.745718] remove_vma+0x139/0x170 [ 60.746168] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.746744] do_vmi_munmap+0x1f1/0x2b0 [ 60.747227] __vm_munmap+0x138/0x3a0 [ 60.747717] __x64_sys_munmap+0x59/0x80 [ 60.748217] do_syscall_64+0x3f/0x90 [ 60.748704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.749373] [ 60.749596] The buggy address belongs to the object at ffff88800ea1e658 [ 60.749596] which belongs to the cache vm_area_struct of size 168 [ 60.751116] The buggy address is located 88 bytes inside of [ 60.751116] freed 168-byte region [ffff88800ea1e658, ffff88800ea1e700) [ 60.752570] [ 60.752805] The buggy address belongs to the physical page: [ 60.753486] page:00000000a75d1406 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea1e [ 60.754604] memcg:ffff88800c642d01 [ 60.755035] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.755719] page_type: 0xffffffff() [ 60.756177] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.757128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c642d01 [ 60.758052] page dumped because: kasan: bad access detected [ 60.758732] [ 60.758953] Memory state around the buggy address: [ 60.759568] ffff88800ea1e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.760452] ffff88800ea1e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.761336] >ffff88800ea1e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.762206] ^ [ 60.762820] ffff88800ea1e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.763707] ffff88800ea1e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.764570] ================================================================== [ 60.765521] Disabling lock debugging due to kernel taint [ 63.011687] BUG: Bad rss-counter state mm:00000000e28357cf type:MM_FILEPAGES val:33 [ 63.012753] BUG: Bad rss-counter state mm:00000000e28357cf type:MM_ANONPAGES val:22 [ 63.551859] BUG: Bad rss-counter state mm:0000000031a98a1d type:MM_FILEPAGES val:33 [ 63.553054] BUG: Bad rss-counter state mm:0000000031a98a1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16849' (ECDSA) to the list of known hosts. 2023/06/20 12:50:19 fuzzer started 2023/06/20 12:50:20 dialing manager at localhost:36067 2023/06/20 12:50:20 checking machine... 2023/06/20 12:50:20 checking revisions... [ 64.232976] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:50:20 testing simple program... [ 64.286712] cgroup: Unknown subsys name 'net' [ 64.324200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:50:19 Registers: info registers vcpu 0 RAX=1ffff110025e42a6 RBX=ffff888012f759e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888012f21530 RBP=ffff888012f1bb18 RSP=ffff888019a6fb08 R8 =0000000000000001 R9 =ffffed100334df55 R10=0000000000000003 R11=00000000002a0000 R12=dffffc0000000000 R13=ffff888012f5d400 R14=ffffffff81803033 R15=ffff888019b72d20 RIP=ffffffff8184652d RFL=00000046 [---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 00007fb6843dc900 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=00007ffd15049000 CR3=000000000ecc6000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fcbfbf1f000 CR3=000000001984e000 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=30353a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323636 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000