syzkaller login: [ 31.083669] BUG: Bad rss-counter state mm:00000000b3185889 type:MM_FILEPAGES val:33 [ 31.084915] BUG: Bad rss-counter state mm:00000000b3185889 type:MM_ANONPAGES val:22 [ 31.235187] ================================================================== [ 31.236104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237150] Read of size 8 at addr ffff88800dfcdc20 by task sshd/220 [ 31.237913] [ 31.238133] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.239975] Call Trace: [ 31.240297] [ 31.240576] dump_stack_lvl+0x91/0xf0 [ 31.241101] print_report+0xcc/0x620 [ 31.241583] ? __virt_addr_valid+0x102/0x340 [ 31.242133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242744] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243359] kasan_report+0xbe/0xf0 [ 31.243832] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244458] vma_interval_tree_remove+0xc75/0xec0 [ 31.245082] vma_prepare+0xc54/0x11a0 [ 31.245557] __split_vma+0x5af/0x950 [ 31.246033] ? __pfx___split_vma+0x10/0x10 [ 31.246561] ? find_held_lock+0x2c/0x110 [ 31.247082] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247648] ? lock_is_held_type+0x9f/0x120 [ 31.248183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248792] ? mtree_range_walk+0x632/0x900 [ 31.249339] ? mas_walk+0x5c7/0x7c0 [ 31.249817] do_vmi_munmap+0x1f1/0x2b0 [ 31.250309] mmap_region+0x1f9/0x2660 [ 31.250793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252042] ? __pfx_lock_acquire+0x10/0x10 [ 31.252571] ? __pfx_mmap_region+0x10/0x10 [ 31.253122] ? security_mmap_addr+0x7d/0xa0 [ 31.253653] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254202] do_mmap+0x854/0xf00 [ 31.254639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255134] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255699] ksys_mmap_pgoff+0x3af/0x500 [ 31.256207] do_syscall_64+0x3f/0x90 [ 31.256693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257338] RIP: 0033:0x7f0a55e11d82 [ 31.257796] 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 [ 31.259914] RSP: 002b:00007ffdab094098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.260833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a55e11d82 [ 31.261690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a5524b000 [ 31.262540] RBP: 00007f0a5524b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263379] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561877374b20 [ 31.264226] R13: 00007ffdab0940b0 R14: 00007ffdab0940e0 R15: 00007ffdab094440 [ 31.265106] [ 31.265401] [ 31.265617] Allocated by task 213: [ 31.266047] kasan_save_stack+0x22/0x50 [ 31.266554] kasan_set_track+0x25/0x30 [ 31.267048] __kasan_slab_alloc+0x59/0x70 [ 31.267569] kmem_cache_alloc+0x16b/0x370 [ 31.268087] vm_area_dup+0x20/0x160 [ 31.268539] __split_vma+0x170/0x950 [ 31.269012] split_vma+0xc6/0x110 [ 31.269448] mprotect_fixup+0x8d2/0xb30 [ 31.269951] do_mprotect_pkey+0x87e/0xd40 [ 31.270471] __x64_sys_mprotect+0x78/0xc0 [ 31.270993] do_syscall_64+0x3f/0x90 [ 31.271465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272103] [ 31.272321] Freed by task 213: [ 31.272724] kasan_save_stack+0x22/0x50 [ 31.273225] kasan_set_track+0x25/0x30 [ 31.273713] kasan_save_free_info+0x2b/0x50 [ 31.274239] __kasan_slab_free+0x10a/0x190 [ 31.274769] kmem_cache_free+0x10d/0x4d0 [ 31.275271] rcu_core+0x8c8/0x2860 [ 31.275713] __do_softirq+0x1b7/0x7d4 [ 31.276199] [ 31.276413] Last potentially related work creation: [ 31.277007] kasan_save_stack+0x22/0x50 [ 31.277505] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.278713] remove_vma+0x139/0x170 [ 31.279164] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.279718] do_vmi_munmap+0x1f1/0x2b0 [ 31.280199] __vm_munmap+0x138/0x3a0 [ 31.280673] __x64_sys_munmap+0x59/0x80 [ 31.281173] do_syscall_64+0x3f/0x90 [ 31.281650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282291] [ 31.282508] The buggy address belongs to the object at ffff88800dfcdbc8 [ 31.282508] which belongs to the cache vm_area_struct of size 168 [ 31.283964] The buggy address is located 88 bytes inside of [ 31.283964] freed 168-byte region [ffff88800dfcdbc8, ffff88800dfcdc70) [ 31.285383] [ 31.285605] The buggy address belongs to the physical page: [ 31.286265] page:000000002766536e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcd [ 31.287334] memcg:ffff88800ed42001 [ 31.287763] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288414] page_type: 0xffffffff() [ 31.288870] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.289780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed42001 [ 31.290682] page dumped because: kasan: bad access detected [ 31.291349] [ 31.291565] Memory state around the buggy address: [ 31.292138] ffff88800dfcdb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.292993] ffff88800dfcdb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.293842] >ffff88800dfcdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.294687] ^ [ 31.295219] ffff88800dfcdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.296069] ffff88800dfcdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.296928] ================================================================== [ 31.297988] Disabling lock debugging due to kernel taint [ 33.511936] BUG: Bad rss-counter state mm:000000000d30c77c type:MM_FILEPAGES val:33 [ 33.512935] BUG: Bad rss-counter state mm:000000000d30c77c type:MM_ANONPAGES val:22 [ 33.890583] BUG: Bad rss-counter state mm:0000000033961cb2 type:MM_FILEPAGES val:33 [ 33.892108] BUG: Bad rss-counter state mm:0000000033961cb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53657' (ECDSA) to the list of known hosts. 2023/06/20 15:54:09 fuzzer started 2023/06/20 15:54:10 dialing manager at localhost:36067 2023/06/20 15:54:10 checking machine... 2023/06/20 15:54:10 checking revisions... [ 34.642600] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:54:10 testing simple program... [ 34.692506] cgroup: Unknown subsys name 'net' [ 34.745296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff11001d60f46 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800eb07a40 RSP=ffff88800eb07978 R8 =ffffffff860d825a R9 =ffff88800eb07a28 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800eb07a48 R13=ffff88800eb07a30 R14=ffff88800eb07b20 R15=ffff88800eb079e8 RIP=ffffffff81131c60 RFL=00000246 [---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 00007f1e9e25a900 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=00007f1e9e811618 CR3=000000000ec54000 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=563412feff00545000000000000080fe 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 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=ffff888008c04400 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=00007f178c3e84e0 CR3=000000000e84a000 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=2039303a34353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a34353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000