syzkaller login: [ 31.099956] BUG: Bad rss-counter state mm:00000000a2d9508f type:MM_FILEPAGES val:33 [ 31.101116] BUG: Bad rss-counter state mm:00000000a2d9508f type:MM_ANONPAGES val:22 [ 31.262198] ================================================================== [ 31.263325] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264292] Read of size 8 at addr ffff88800f144058 by task sshd/221 [ 31.265184] [ 31.265402] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.266261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.267258] Call Trace: [ 31.267579] [ 31.267860] dump_stack_lvl+0x91/0xf0 [ 31.268357] print_report+0xcc/0x620 [ 31.268846] ? __virt_addr_valid+0x102/0x340 [ 31.269400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270094] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270756] kasan_report+0xbe/0xf0 [ 31.271251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271906] vma_interval_tree_remove+0xc75/0xec0 [ 31.272514] vma_prepare+0xc54/0x11a0 [ 31.272992] __split_vma+0x5af/0x950 [ 31.273463] ? __pfx___split_vma+0x10/0x10 [ 31.273994] ? find_held_lock+0x2c/0x110 [ 31.274526] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.275105] ? lock_is_held_type+0x9f/0x120 [ 31.275643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.276243] ? mtree_range_walk+0x632/0x900 [ 31.276798] ? mas_walk+0x5c7/0x7c0 [ 31.277277] do_vmi_munmap+0x1f1/0x2b0 [ 31.277769] mmap_region+0x1f9/0x2660 [ 31.278256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.278771] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279485] ? __pfx_lock_acquire+0x10/0x10 [ 31.280018] ? __pfx_mmap_region+0x10/0x10 [ 31.280551] ? security_mmap_addr+0x7d/0xa0 [ 31.281078] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281623] do_mmap+0x854/0xf00 [ 31.282060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.283136] ksys_mmap_pgoff+0x3af/0x500 [ 31.283641] do_syscall_64+0x3f/0x90 [ 31.284117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284766] RIP: 0033:0x7fa5f871cd82 [ 31.285220] 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 [ 31.287339] RSP: 002b:00007ffeb22086d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.288251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5f871cd82 [ 31.289096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5f7b56000 [ 31.289939] RBP: 00007fa5f7b56000 R08: 0000000000000009 R09: 0000000000001000 [ 31.290802] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b17809eec0 [ 31.291649] R13: 00007ffeb22086f0 R14: 00007ffeb2208720 R15: 00007ffeb2208a80 [ 31.292511] [ 31.292802] [ 31.293015] Allocated by task 214: [ 31.293440] kasan_save_stack+0x22/0x50 [ 31.293947] kasan_set_track+0x25/0x30 [ 31.294447] __kasan_slab_alloc+0x59/0x70 [ 31.294972] kmem_cache_alloc+0x16b/0x370 [ 31.295488] vm_area_dup+0x20/0x160 [ 31.295941] __split_vma+0x170/0x950 [ 31.296406] split_vma+0xc6/0x110 [ 31.296842] mprotect_fixup+0x8d2/0xb30 [ 31.297345] do_mprotect_pkey+0x87e/0xd40 [ 31.297862] __x64_sys_mprotect+0x78/0xc0 [ 31.298382] do_syscall_64+0x3f/0x90 [ 31.298878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299524] [ 31.299739] Freed by task 214: [ 31.300133] kasan_save_stack+0x22/0x50 [ 31.300638] kasan_set_track+0x25/0x30 [ 31.301129] kasan_save_free_info+0x2b/0x50 [ 31.301658] __kasan_slab_free+0x10a/0x190 [ 31.302188] kmem_cache_free+0x10d/0x4d0 [ 31.302700] rcu_core+0x8c8/0x2860 [ 31.303142] __do_softirq+0x1b7/0x7d4 [ 31.303616] [ 31.303832] Last potentially related work creation: [ 31.304418] kasan_save_stack+0x22/0x50 [ 31.304920] __kasan_record_aux_stack+0x8e/0xa0 [ 31.305569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306217] remove_vma+0x139/0x170 [ 31.306712] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307271] do_vmi_munmap+0x1f1/0x2b0 [ 31.307756] __vm_munmap+0x138/0x3a0 [ 31.308223] __x64_sys_munmap+0x59/0x80 [ 31.308723] do_syscall_64+0x3f/0x90 [ 31.309198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309846] [ 31.310061] The buggy address belongs to the object at ffff88800f144000 [ 31.310061] which belongs to the cache vm_area_struct of size 168 [ 31.311521] The buggy address is located 88 bytes inside of [ 31.311521] freed 168-byte region [ffff88800f144000, ffff88800f1440a8) [ 31.312914] [ 31.313133] The buggy address belongs to the physical page: [ 31.313782] page:000000003664bfeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf144 [ 31.314880] memcg:ffff88800d6d2001 [ 31.315303] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.315943] page_type: 0xffffffff() [ 31.316391] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.317307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6d2001 [ 31.318212] page dumped because: kasan: bad access detected [ 31.318887] [ 31.319105] Memory state around the buggy address: [ 31.319676] ffff88800f143f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.320528] ffff88800f143f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.321388] >ffff88800f144000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.322233] ^ [ 31.322963] ffff88800f144080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.323810] ffff88800f144100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324655] ================================================================== [ 31.325582] Disabling lock debugging due to kernel taint [ 33.204916] BUG: Bad rss-counter state mm:000000003dd3e4e6 type:MM_FILEPAGES val:33 [ 33.206031] BUG: Bad rss-counter state mm:000000003dd3e4e6 type:MM_ANONPAGES val:22 [ 33.695654] BUG: Bad rss-counter state mm:00000000d522aa6e type:MM_FILEPAGES val:33 [ 33.696857] BUG: Bad rss-counter state mm:00000000d522aa6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52538' (ECDSA) to the list of known hosts. 2023/06/20 22:22:16 fuzzer started 2023/06/20 22:22:17 dialing manager at localhost:36067 2023/06/20 22:22:17 checking machine... 2023/06/20 22:22:17 checking revisions... [ 34.261082] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:22:17 testing simple program... [ 34.309391] cgroup: Unknown subsys name 'net' [ 34.347507] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcef2d5938 CR3=000000000e36c000 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=2036313a32323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a32323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c272c4 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86139620 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86139622 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888013e57c38 R15=ffff88806cf09a78 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007ff2c9161900 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=00007ff2c9718618 CR3=0000000015e9c000 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=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