syzkaller login: [ 31.519060] BUG: Bad rss-counter state mm:0000000028f8d859 type:MM_FILEPAGES val:33 [ 31.520842] BUG: Bad rss-counter state mm:0000000028f8d859 type:MM_ANONPAGES val:22 [ 31.696678] ================================================================== [ 31.697649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.698641] Read of size 8 at addr ffff888018c8d6b0 by task sshd/220 [ 31.699487] [ 31.699723] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.700598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.701607] Call Trace: [ 31.701933] [ 31.702222] dump_stack_lvl+0x91/0xf0 [ 31.702785] print_report+0xcc/0x620 [ 31.703279] ? __virt_addr_valid+0x102/0x340 [ 31.703849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.704485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705141] kasan_report+0xbe/0xf0 [ 31.705633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706267] vma_interval_tree_remove+0xc75/0xec0 [ 31.706908] vma_prepare+0xc54/0x11a0 [ 31.707399] __split_vma+0x5af/0x950 [ 31.707896] ? __pfx___split_vma+0x10/0x10 [ 31.708438] ? find_held_lock+0x2c/0x110 [ 31.708984] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.709570] ? lock_is_held_type+0x9f/0x120 [ 31.710122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.710780] ? mtree_range_walk+0x632/0x900 [ 31.711352] ? mas_walk+0x5c7/0x7c0 [ 31.711870] do_vmi_munmap+0x1f1/0x2b0 [ 31.712369] mmap_region+0x1f9/0x2660 [ 31.712905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.713424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.714180] ? __pfx_lock_acquire+0x10/0x10 [ 31.714762] ? __pfx_mmap_region+0x10/0x10 [ 31.715299] ? security_mmap_addr+0x7d/0xa0 [ 31.715856] ? get_unmapped_area+0x1f5/0x3f0 [ 31.716416] do_mmap+0x854/0xf00 [ 31.716886] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.717402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.717994] ksys_mmap_pgoff+0x3af/0x500 [ 31.718521] do_syscall_64+0x3f/0x90 [ 31.719024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.719703] RIP: 0033:0x7f62fbc2fd82 [ 31.720177] 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 [ 31.722379] RSP: 002b:00007ffd05c842b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.723342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62fbc2fd82 [ 31.724231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62fb069000 [ 31.725111] RBP: 00007f62fb069000 R08: 0000000000000009 R09: 0000000000001000 [ 31.725982] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a355d4ef70 [ 31.726869] R13: 00007ffd05c842d0 R14: 00007ffd05c84300 R15: 00007ffd05c84660 [ 31.727764] [ 31.728068] [ 31.728292] Allocated by task 213: [ 31.728760] kasan_save_stack+0x22/0x50 [ 31.729277] kasan_set_track+0x25/0x30 [ 31.729796] __kasan_slab_alloc+0x59/0x70 [ 31.730342] kmem_cache_alloc+0x16b/0x370 [ 31.730887] vm_area_dup+0x20/0x160 [ 31.731348] __split_vma+0x170/0x950 [ 31.731835] split_vma+0xc6/0x110 [ 31.732287] mprotect_fixup+0x8d2/0xb30 [ 31.732824] do_mprotect_pkey+0x87e/0xd40 [ 31.733358] __x64_sys_mprotect+0x78/0xc0 [ 31.733905] do_syscall_64+0x3f/0x90 [ 31.734386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735086] [ 31.735309] Freed by task 210: [ 31.735719] kasan_save_stack+0x22/0x50 [ 31.736242] kasan_set_track+0x25/0x30 [ 31.736772] kasan_save_free_info+0x2b/0x50 [ 31.737323] __kasan_slab_free+0x10a/0x190 [ 31.737888] kmem_cache_free+0x10d/0x4d0 [ 31.738415] rcu_core+0x8c8/0x2860 [ 31.738901] __do_softirq+0x1b7/0x7d4 [ 31.739392] [ 31.739629] Last potentially related work creation: [ 31.740229] kasan_save_stack+0x22/0x50 [ 31.740765] __kasan_record_aux_stack+0x8e/0xa0 [ 31.741353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.742023] remove_vma+0x139/0x170 [ 31.742496] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.743074] do_vmi_munmap+0x1f1/0x2b0 [ 31.743589] __vm_munmap+0x138/0x3a0 [ 31.744063] __x64_sys_munmap+0x59/0x80 [ 31.744581] do_syscall_64+0x3f/0x90 [ 31.745090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745764] [ 31.745987] The buggy address belongs to the object at ffff888018c8d658 [ 31.745987] which belongs to the cache vm_area_struct of size 168 [ 31.747557] The buggy address is located 88 bytes inside of [ 31.747557] freed 168-byte region [ffff888018c8d658, ffff888018c8d700) [ 31.749027] [ 31.749255] The buggy address belongs to the physical page: [ 31.749947] page:000000004820f313 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c8d [ 31.751366] memcg:ffff88800dfc0101 [ 31.751924] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.752743] page_type: 0xffffffff() [ 31.753317] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.754485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc0101 [ 31.755617] page dumped because: kasan: bad access detected [ 31.756324] [ 31.756550] Memory state around the buggy address: [ 31.757163] ffff888018c8d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.758065] ffff888018c8d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.758960] >ffff888018c8d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.759845] ^ [ 31.760443] ffff888018c8d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.761322] ffff888018c8d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.762193] ================================================================== [ 31.763322] Disabling lock debugging due to kernel taint [ 33.624009] BUG: Bad rss-counter state mm:0000000033adefa0 type:MM_FILEPAGES val:33 [ 33.625259] BUG: Bad rss-counter state mm:0000000033adefa0 type:MM_ANONPAGES val:22 [ 34.108255] BUG: Bad rss-counter state mm:000000002bc1a791 type:MM_FILEPAGES val:33 [ 34.109258] BUG: Bad rss-counter state mm:000000002bc1a791 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21770' (ECDSA) to the list of known hosts. 2023/06/19 15:20:26 fuzzer started 2023/06/19 15:20:26 dialing manager at localhost:44161 2023/06/19 15:20:26 checking machine... 2023/06/19 15:20:26 checking revisions... [ 34.852954] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:20:26 testing simple program... [ 34.898864] cgroup: Unknown subsys name 'net' [ 34.967015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:20:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800d9afa20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fbf32645d77 R13=0000000000000000 R14=ffff888016bf3680 R15=dffffc0000000000 RIP=ffffffff814c0388 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 00007fbf3215e900 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=00007fbf32715618 CR3=0000000019908000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fad5f7f2970 CR3=000000000d048000 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=2035323a30323a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30323a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000