syzkaller login: [ 31.297974] BUG: Bad rss-counter state mm:00000000c563e22c type:MM_FILEPAGES val:33 [ 31.299237] BUG: Bad rss-counter state mm:00000000c563e22c type:MM_ANONPAGES val:22 [ 31.345415] ================================================================== [ 31.346379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.347359] Read of size 8 at addr ffff88800ed6f6b0 by task sshd/220 [ 31.348127] [ 31.348345] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.349242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350239] Call Trace: [ 31.350556] [ 31.350845] dump_stack_lvl+0x91/0xf0 [ 31.351341] print_report+0xcc/0x620 [ 31.351834] ? __virt_addr_valid+0x102/0x340 [ 31.352390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353050] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353677] kasan_report+0xbe/0xf0 [ 31.354160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354794] vma_interval_tree_remove+0xc75/0xec0 [ 31.355408] vma_prepare+0xc54/0x11a0 [ 31.355894] __split_vma+0x5af/0x950 [ 31.356383] ? __pfx___split_vma+0x10/0x10 [ 31.356927] ? find_held_lock+0x2c/0x110 [ 31.357461] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.358027] ? lock_is_held_type+0x9f/0x120 [ 31.358576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359190] ? mtree_range_walk+0x632/0x900 [ 31.359762] ? mas_walk+0x5c7/0x7c0 [ 31.360245] do_vmi_munmap+0x1f1/0x2b0 [ 31.360768] mmap_region+0x1f9/0x2660 [ 31.361266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362518] ? __pfx_lock_acquire+0x10/0x10 [ 31.363053] ? __pfx_mmap_region+0x10/0x10 [ 31.363588] ? security_mmap_addr+0x7d/0xa0 [ 31.364127] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364707] do_mmap+0x854/0xf00 [ 31.365174] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.365682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366250] ksys_mmap_pgoff+0x3af/0x500 [ 31.366771] do_syscall_64+0x3f/0x90 [ 31.367257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367924] RIP: 0033:0x7fadfccddd82 [ 31.368390] 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 [ 31.370546] RSP: 002b:00007ffd47994bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.371464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadfccddd82 [ 31.372320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadfc117000 [ 31.373193] RBP: 00007fadfc117000 R08: 0000000000000009 R09: 0000000000001000 [ 31.374050] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ccffff2ec0 [ 31.374908] R13: 00007ffd47994c10 R14: 00007ffd47994c40 R15: 00007ffd47994fa0 [ 31.375784] [ 31.376076] [ 31.376292] Allocated by task 213: [ 31.376753] kasan_save_stack+0x22/0x50 [ 31.377265] kasan_set_track+0x25/0x30 [ 31.377767] __kasan_slab_alloc+0x59/0x70 [ 31.378300] kmem_cache_alloc+0x16b/0x370 [ 31.378824] vm_area_dup+0x20/0x160 [ 31.379290] __split_vma+0x170/0x950 [ 31.379767] split_vma+0xc6/0x110 [ 31.380211] mprotect_fixup+0x8d2/0xb30 [ 31.380742] do_mprotect_pkey+0x87e/0xd40 [ 31.381290] __x64_sys_mprotect+0x78/0xc0 [ 31.381819] do_syscall_64+0x3f/0x90 [ 31.382303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382959] [ 31.383179] Freed by task 213: [ 31.383573] kasan_save_stack+0x22/0x50 [ 31.384080] kasan_set_track+0x25/0x30 [ 31.384587] kasan_save_free_info+0x2b/0x50 [ 31.385139] __kasan_slab_free+0x10a/0x190 [ 31.385676] kmem_cache_free+0x10d/0x4d0 [ 31.386192] rcu_core+0x8c8/0x2860 [ 31.386639] __do_softirq+0x1b7/0x7d4 [ 31.387131] [ 31.387346] Last potentially related work creation: [ 31.387935] kasan_save_stack+0x22/0x50 [ 31.388459] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389712] remove_vma+0x139/0x170 [ 31.390162] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390734] do_vmi_munmap+0x1f1/0x2b0 [ 31.391225] __vm_munmap+0x138/0x3a0 [ 31.391699] __x64_sys_munmap+0x59/0x80 [ 31.392201] do_syscall_64+0x3f/0x90 [ 31.392691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393346] [ 31.393564] Second to last potentially related work creation: [ 31.394264] kasan_save_stack+0x22/0x50 [ 31.394792] __kasan_record_aux_stack+0x8e/0xa0 [ 31.395380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.396038] remove_vma+0x139/0x170 [ 31.396523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.397096] do_vmi_munmap+0x1f1/0x2b0 [ 31.397594] move_vma.constprop.0+0x88a/0x1ba0 [ 31.398179] __do_sys_mremap+0xb78/0x1780 [ 31.398702] do_syscall_64+0x3f/0x90 [ 31.399189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399849] [ 31.400064] The buggy address belongs to the object at ffff88800ed6f658 [ 31.400064] which belongs to the cache vm_area_struct of size 168 [ 31.401570] The buggy address is located 88 bytes inside of [ 31.401570] freed 168-byte region [ffff88800ed6f658, ffff88800ed6f700) [ 31.402999] [ 31.403214] The buggy address belongs to the physical page: [ 31.403878] page:00000000c4340c9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed6f [ 31.404984] memcg:ffff88800c891d01 [ 31.405418] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406132] page_type: 0xffffffff() [ 31.406601] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b2c0 dead000000000007 [ 31.407533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c891d01 [ 31.408477] page dumped because: kasan: bad access detected [ 31.409151] [ 31.409378] Memory state around the buggy address: [ 31.409973] ffff88800ed6f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410842] ffff88800ed6f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.411728] >ffff88800ed6f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.412598] ^ [ 31.413204] ffff88800ed6f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.414094] ffff88800ed6f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.414969] ================================================================== [ 31.416164] Disabling lock debugging due to kernel taint [ 33.381968] BUG: Bad rss-counter state mm:0000000026af6930 type:MM_FILEPAGES val:33 [ 33.383501] BUG: Bad rss-counter state mm:0000000026af6930 type:MM_ANONPAGES val:22 [ 33.875424] BUG: Bad rss-counter state mm:00000000daca193e type:MM_FILEPAGES val:33 [ 33.876523] BUG: Bad rss-counter state mm:00000000daca193e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65362' (ECDSA) to the list of known hosts. 2023/06/21 05:40:57 fuzzer started 2023/06/21 05:40:57 dialing manager at localhost:36067 2023/06/21 05:40:58 checking machine... 2023/06/21 05:40:58 checking revisions... [ 34.617425] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:40:58 testing simple program... [ 34.666953] cgroup: Unknown subsys name 'net' [ 34.714866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:40:57 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888015dd9068 RCX=0000000000000000 RDX=ffff888014621b40 RSI=ffffffff818d5095 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff8880147af928 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888015dd9068 R11=0000000000000001 R12=ffff88806cc90a30 R13=ffff888014396468 R14=dffffc0000000000 R15=ffff8880147afc58 RIP=ffffffff814c0860 RFL=00000216 [----AP-] 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 00007f746c2d8900 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=00007f746b74bd10 CR3=000000000dad0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=48d00f41da8c7e0e00000000000ae988 XMM05=d513cdfefebeda4b0000000000133a58 XMM06=4d5c5ee5b6aee07a00000000001327f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002b606d0 RBX=0000000000000009 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=000000000000000a RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888019082fd8 RIP=ffffffff813781fd 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 00007fb392225900 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=00007fb3927dc618 CR3=000000000c548000 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