syzkaller login: [ 30.712769] BUG: Bad rss-counter state mm:00000000153107c7 type:MM_FILEPAGES val:33 [ 30.713823] BUG: Bad rss-counter state mm:00000000153107c7 type:MM_ANONPAGES val:22 [ 30.881227] ================================================================== [ 30.882142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.883084] Read of size 8 at addr ffff88800eb524e0 by task sshd/220 [ 30.883854] [ 30.884075] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.885189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.886187] Call Trace: [ 30.886518] [ 30.886818] dump_stack_lvl+0x91/0xf0 [ 30.887315] print_report+0xcc/0x620 [ 30.887826] ? __virt_addr_valid+0x102/0x340 [ 30.888386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889040] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889676] kasan_report+0xbe/0xf0 [ 30.890157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890801] vma_interval_tree_remove+0xc75/0xec0 [ 30.891417] vma_prepare+0xc54/0x11a0 [ 30.891923] __split_vma+0x5af/0x950 [ 30.892405] ? __pfx___split_vma+0x10/0x10 [ 30.892961] ? find_held_lock+0x2c/0x110 [ 30.893509] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.894089] ? lock_is_held_type+0x9f/0x120 [ 30.894642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.895261] ? mtree_range_walk+0x632/0x900 [ 30.895841] ? mas_walk+0x5c7/0x7c0 [ 30.896319] do_vmi_munmap+0x1f1/0x2b0 [ 30.896838] mmap_region+0x1f9/0x2660 [ 30.897331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.897872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.898610] ? __pfx_lock_acquire+0x10/0x10 [ 30.899149] ? __pfx_mmap_region+0x10/0x10 [ 30.899712] ? security_mmap_addr+0x7d/0xa0 [ 30.900252] ? get_unmapped_area+0x1f5/0x3f0 [ 30.900862] do_mmap+0x854/0xf00 [ 30.901313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.901846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.902413] ksys_mmap_pgoff+0x3af/0x500 [ 30.902941] do_syscall_64+0x3f/0x90 [ 30.903431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904270] RIP: 0033:0x7fe090df0d82 [ 30.904766] 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 [ 30.906950] RSP: 002b:00007fff651cb748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.907873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe090df0d82 [ 30.908743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe09022a000 [ 30.909606] RBP: 00007fe09022a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.910468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d0914ec0 [ 30.911339] R13: 00007fff651cb760 R14: 00007fff651cb790 R15: 00007fff651cbaf0 [ 30.912206] [ 30.912511] [ 30.912757] Allocated by task 213: [ 30.913184] kasan_save_stack+0x22/0x50 [ 30.913698] kasan_set_track+0x25/0x30 [ 30.914194] __kasan_slab_alloc+0x59/0x70 [ 30.914751] kmem_cache_alloc+0x16b/0x370 [ 30.915277] vm_area_dup+0x20/0x160 [ 30.915751] __split_vma+0x170/0x950 [ 30.916218] split_vma+0xc6/0x110 [ 30.916670] mprotect_fixup+0x8d2/0xb30 [ 30.917187] do_mprotect_pkey+0x87e/0xd40 [ 30.917730] __x64_sys_mprotect+0x78/0xc0 [ 30.918256] do_syscall_64+0x3f/0x90 [ 30.918765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919434] [ 30.919666] Freed by task 213: [ 30.920064] kasan_save_stack+0x22/0x50 [ 30.920586] kasan_set_track+0x25/0x30 [ 30.921105] kasan_save_free_info+0x2b/0x50 [ 30.921663] __kasan_slab_free+0x10a/0x190 [ 30.922191] kmem_cache_free+0x10d/0x4d0 [ 30.922732] rcu_core+0x8c8/0x2860 [ 30.923188] __do_softirq+0x1b7/0x7d4 [ 30.923686] [ 30.923902] Last potentially related work creation: [ 30.924505] kasan_save_stack+0x22/0x50 [ 30.925028] __kasan_record_aux_stack+0x8e/0xa0 [ 30.925618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.926342] remove_vma+0x139/0x170 [ 30.926820] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.927385] do_vmi_munmap+0x1f1/0x2b0 [ 30.927905] __vm_munmap+0x138/0x3a0 [ 30.928375] __x64_sys_munmap+0x59/0x80 [ 30.928915] do_syscall_64+0x3f/0x90 [ 30.929393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.930054] [ 30.930269] The buggy address belongs to the object at ffff88800eb52488 [ 30.930269] which belongs to the cache vm_area_struct of size 168 [ 30.931791] The buggy address is located 88 bytes inside of [ 30.931791] freed 168-byte region [ffff88800eb52488, ffff88800eb52530) [ 30.933249] [ 30.933476] The buggy address belongs to the physical page: [ 30.934152] page:00000000c4ef706e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb52 [ 30.935275] memcg:ffff88800d832501 [ 30.935724] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.936379] page_type: 0xffffffff() [ 30.936858] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.937803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d832501 [ 30.938751] page dumped because: kasan: bad access detected [ 30.939420] [ 30.939652] Memory state around the buggy address: [ 30.940233] ffff88800eb52380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.941147] ffff88800eb52400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.942049] >ffff88800eb52480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.942942] ^ [ 30.943727] ffff88800eb52500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.944601] ffff88800eb52580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.945482] ================================================================== [ 30.946645] Disabling lock debugging due to kernel taint [ 33.694806] BUG: Bad rss-counter state mm:00000000f0a0496b type:MM_FILEPAGES val:33 [ 33.696194] BUG: Bad rss-counter state mm:00000000f0a0496b type:MM_ANONPAGES val:22 [ 34.164546] BUG: Bad rss-counter state mm:000000005ab66f87 type:MM_FILEPAGES val:33 [ 34.165565] BUG: Bad rss-counter state mm:000000005ab66f87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19984' (ECDSA) to the list of known hosts. 2023/06/20 18:22:03 fuzzer started 2023/06/20 18:22:03 dialing manager at localhost:36067 2023/06/20 18:22:03 checking machine... 2023/06/20 18:22:03 checking revisions... [ 34.888895] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:22:03 testing simple program... [ 34.937786] cgroup: Unknown subsys name 'net' [ 34.982204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:22:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002b6ff16 RCX=0000000000000000 RDX=ffff888015af51c0 RSI=ffffffff83741ff8 RDI=0000000000000005 RBP=ffff888018ee3c00 RSP=ffff888015b7f880 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801bcbf500 R15=0000000000000000 RIP=ffffffff813744b6 RFL=00000293 [--S-A-C] 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 00007f8cb2045900 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=00007f8cb25fc618 CR3=0000000019c28000 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=2033303a32323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32323a3831203032 XMM08=3d656e696c646d632022656369767265 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=00007fdd9cbd9a50 CR3=000000000c9ea000 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=3e8d8f9008b08cbfeb4bfd7091ceaadd XMM02=ec2efd57dc4c00df000000000011da30 XMM03=c8e2500db7e85bc5000000000011db00 XMM04=61a5ac91e849a06d00000000000ae988 XMM05=989bc2e2f727a3450000000000132f08 XMM06=4fda316b135da52b0000000000131fa8 XMM07=e042d86d42eb936e00000000001224c0 XMM08=c8e2500db7e85bc5000000000011db00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000