syzkaller login: [ 30.630833] BUG: Bad rss-counter state mm:0000000018ba821b type:MM_FILEPAGES val:33 [ 30.631779] BUG: Bad rss-counter state mm:0000000018ba821b type:MM_ANONPAGES val:22 [ 30.733671] ================================================================== [ 30.734200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.734739] Read of size 8 at addr ffff88800fdd66b0 by task sshd/220 [ 30.735161] [ 30.735282] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.735767] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.736309] Call Trace: [ 30.736490] [ 30.736656] dump_stack_lvl+0x91/0xf0 [ 30.736933] print_report+0xcc/0x620 [ 30.737205] ? __virt_addr_valid+0x102/0x340 [ 30.737512] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738211] kasan_report+0xbe/0xf0 [ 30.738476] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738824] vma_interval_tree_remove+0xc75/0xec0 [ 30.739295] vma_prepare+0xc54/0x11a0 [ 30.739570] __split_vma+0x5af/0x950 [ 30.739837] ? __pfx___split_vma+0x10/0x10 [ 30.740133] ? find_held_lock+0x2c/0x110 [ 30.740424] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.740739] ? lock_is_held_type+0x9f/0x120 [ 30.741036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.741374] ? mtree_range_walk+0x632/0x900 [ 30.741681] ? mas_walk+0x5c7/0x7c0 [ 30.741941] do_vmi_munmap+0x1f1/0x2b0 [ 30.742244] mmap_region+0x1f9/0x2660 [ 30.742514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.742819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.743255] ? __pfx_lock_acquire+0x10/0x10 [ 30.743571] ? __pfx_mmap_region+0x10/0x10 [ 30.743890] ? security_mmap_addr+0x7d/0xa0 [ 30.744205] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744542] do_mmap+0x854/0xf00 [ 30.744793] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.745421] ksys_mmap_pgoff+0x3af/0x500 [ 30.745713] do_syscall_64+0x3f/0x90 [ 30.745997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746399] RIP: 0033:0x7f2c4b183d82 [ 30.746672] 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 [ 30.747941] RSP: 002b:00007ffe73831308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.748493] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c4b183d82 [ 30.749002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c4a5bd000 [ 30.749516] RBP: 00007f2c4a5bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.750022] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a6b0b3d90 [ 30.750537] R13: 00007ffe73831320 R14: 00007ffe73831350 R15: 00007ffe738316b0 [ 30.751043] [ 30.751215] [ 30.751340] Allocated by task 213: [ 30.751596] kasan_save_stack+0x22/0x50 [ 30.751892] kasan_set_track+0x25/0x30 [ 30.752182] __kasan_slab_alloc+0x59/0x70 [ 30.752490] kmem_cache_alloc+0x16b/0x370 [ 30.752799] vm_area_dup+0x20/0x160 [ 30.753063] __split_vma+0x170/0x950 [ 30.753341] split_vma+0xc6/0x110 [ 30.753604] mprotect_fixup+0x8d2/0xb30 [ 30.753898] do_mprotect_pkey+0x87e/0xd40 [ 30.754210] __x64_sys_mprotect+0x78/0xc0 [ 30.754514] do_syscall_64+0x3f/0x90 [ 30.754794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755173] [ 30.755301] Freed by task 13: [ 30.755529] kasan_save_stack+0x22/0x50 [ 30.755828] kasan_set_track+0x25/0x30 [ 30.756117] kasan_save_free_info+0x2b/0x50 [ 30.756434] __kasan_slab_free+0x10a/0x190 [ 30.756750] kmem_cache_free+0x10d/0x4d0 [ 30.757045] rcu_core+0x8c8/0x2860 [ 30.757309] __do_softirq+0x1b7/0x7d4 [ 30.757594] [ 30.757721] Last potentially related work creation: [ 30.758079] kasan_save_stack+0x22/0x50 [ 30.758373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.758718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.759094] remove_vma+0x139/0x170 [ 30.759366] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.759690] do_vmi_munmap+0x1f1/0x2b0 [ 30.759975] __vm_munmap+0x138/0x3a0 [ 30.760254] __x64_sys_munmap+0x59/0x80 [ 30.760553] do_syscall_64+0x3f/0x90 [ 30.760832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761212] [ 30.761335] The buggy address belongs to the object at ffff88800fdd6658 [ 30.761335] which belongs to the cache vm_area_struct of size 168 [ 30.762218] The buggy address is located 88 bytes inside of [ 30.762218] freed 168-byte region [ffff88800fdd6658, ffff88800fdd6700) [ 30.763067] [ 30.763197] The buggy address belongs to the physical page: [ 30.763586] page:00000000d52ce924 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd6 [ 30.764230] memcg:ffff888017eaeb01 [ 30.764480] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764861] page_type: 0xffffffff() [ 30.765127] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.765686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017eaeb01 [ 30.766235] page dumped because: kasan: bad access detected [ 30.766631] [ 30.766756] Memory state around the buggy address: [ 30.767101] ffff88800fdd6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.767608] ffff88800fdd6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.768124] >ffff88800fdd6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.768639] ^ [ 30.768988] ffff88800fdd6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.769497] ffff88800fdd6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.770004] ================================================================== [ 30.770579] Disabling lock debugging due to kernel taint [ 32.960387] BUG: Bad rss-counter state mm:0000000094902f46 type:MM_FILEPAGES val:33 [ 32.961379] BUG: Bad rss-counter state mm:0000000094902f46 type:MM_ANONPAGES val:22 [ 33.439644] BUG: Bad rss-counter state mm:00000000d2aa957a type:MM_FILEPAGES val:33 [ 33.440687] BUG: Bad rss-counter state mm:00000000d2aa957a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61890' (ECDSA) to the list of known hosts. 2023/06/20 16:08:52 fuzzer started 2023/06/20 16:08:52 dialing manager at localhost:36067 2023/06/20 16:08:52 checking machine... 2023/06/20 16:08:52 checking revisions... [ 34.144823] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:08:53 testing simple program... [ 34.192926] cgroup: Unknown subsys name 'net' [ 34.244857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:52 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009a3f120 RCX=0000000080000000 RDX=ffff8880193ab680 RSI=ffffffff83ab1921 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800c50f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000099b0000099b R12=0000000000000000 R13=0000000000000024 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007f53cf5c2900 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=00007f53cfb79618 CR3=0000000019486000 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=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=00007fafbd0b0140 CR3=00000000097ce000 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=7536f2b0a8aa13857e441928486a3739 XMM02=000000000011ac88ec2efd57dc4c00df XMM03=00000000001221289f3441f396341152 XMM04=5a0d333888cf2dfa00000000000ae988 XMM05=19e9129bd510f2350000000000131f58 XMM06=4fda316b135da52b0000000000131de0 XMM07=e042d86d42eb936e00000000001223a8 XMM08=9f3441f396341152000000000011ace8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000