syzkaller login: [ 38.230849] BUG: Bad rss-counter state mm:0000000000cba105 type:MM_FILEPAGES val:33 [ 38.231857] BUG: Bad rss-counter state mm:0000000000cba105 type:MM_ANONPAGES val:22 [ 38.394876] ================================================================== [ 38.395784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.396722] Read of size 8 at addr ffff888018f60798 by task sshd/220 [ 38.397604] [ 38.397827] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.398689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.399702] Call Trace: [ 38.400033] [ 38.400349] dump_stack_lvl+0x91/0xf0 [ 38.400845] print_report+0xcc/0x620 [ 38.401327] ? __virt_addr_valid+0x102/0x340 [ 38.401911] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.402535] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.403152] kasan_report+0xbe/0xf0 [ 38.403630] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.404248] vma_interval_tree_remove+0xc75/0xec0 [ 38.404857] vma_prepare+0xc54/0x11a0 [ 38.405334] __split_vma+0x5af/0x950 [ 38.405824] ? __pfx___split_vma+0x10/0x10 [ 38.406358] ? find_held_lock+0x2c/0x110 [ 38.406883] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.407448] ? lock_is_held_type+0x9f/0x120 [ 38.407985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.408596] ? mtree_range_walk+0x632/0x900 [ 38.409144] ? mas_walk+0x5c7/0x7c0 [ 38.409639] do_vmi_munmap+0x1f1/0x2b0 [ 38.410148] mmap_region+0x1f9/0x2660 [ 38.410641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.411156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.411867] ? __pfx_lock_acquire+0x10/0x10 [ 38.412402] ? __pfx_mmap_region+0x10/0x10 [ 38.412934] ? security_mmap_addr+0x7d/0xa0 [ 38.413464] ? get_unmapped_area+0x1f5/0x3f0 [ 38.414029] do_mmap+0x854/0xf00 [ 38.414471] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.414963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.415527] ksys_mmap_pgoff+0x3af/0x500 [ 38.416035] do_syscall_64+0x3f/0x90 [ 38.416512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.417159] RIP: 0033:0x7f62f1a0cd82 [ 38.417625] 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 [ 38.419732] RSP: 002b:00007ffff52d5498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.420632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62f1a0cd82 [ 38.421480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62f0e46000 [ 38.422325] RBP: 00007f62f0e46000 R08: 0000000000000009 R09: 0000000000001000 [ 38.423167] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a70e390ec0 [ 38.424008] R13: 00007ffff52d54b0 R14: 00007ffff52d54e0 R15: 00007ffff52d5840 [ 38.424862] [ 38.425154] [ 38.425370] Allocated by task 213: [ 38.425812] kasan_save_stack+0x22/0x50 [ 38.426316] kasan_set_track+0x25/0x30 [ 38.426812] __kasan_slab_alloc+0x59/0x70 [ 38.427336] kmem_cache_alloc+0x16b/0x370 [ 38.427848] vm_area_dup+0x20/0x160 [ 38.428301] __split_vma+0x170/0x950 [ 38.428764] split_vma+0xc6/0x110 [ 38.429204] mprotect_fixup+0x8d2/0xb30 [ 38.429714] do_mprotect_pkey+0x87e/0xd40 [ 38.430236] __x64_sys_mprotect+0x78/0xc0 [ 38.430755] do_syscall_64+0x3f/0x90 [ 38.431230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.431870] [ 38.432086] Freed by task 213: [ 38.432479] kasan_save_stack+0x22/0x50 [ 38.432981] kasan_set_track+0x25/0x30 [ 38.433477] kasan_save_free_info+0x2b/0x50 [ 38.434023] __kasan_slab_free+0x10a/0x190 [ 38.434554] kmem_cache_free+0x10d/0x4d0 [ 38.435061] rcu_core+0x8c8/0x2860 [ 38.435503] __do_softirq+0x1b7/0x7d4 [ 38.435977] [ 38.436195] Last potentially related work creation: [ 38.436782] kasan_save_stack+0x22/0x50 [ 38.437291] __kasan_record_aux_stack+0x8e/0xa0 [ 38.437873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.438542] remove_vma+0x139/0x170 [ 38.438994] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.439555] do_vmi_munmap+0x1f1/0x2b0 [ 38.440042] __vm_munmap+0x138/0x3a0 [ 38.440514] __x64_sys_munmap+0x59/0x80 [ 38.441017] do_syscall_64+0x3f/0x90 [ 38.441490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.442142] [ 38.442367] The buggy address belongs to the object at ffff888018f60740 [ 38.442367] which belongs to the cache vm_area_struct of size 168 [ 38.443866] The buggy address is located 88 bytes inside of [ 38.443866] freed 168-byte region [ffff888018f60740, ffff888018f607e8) [ 38.445302] [ 38.445518] The buggy address belongs to the physical page: [ 38.446203] page:00000000bb9580ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f60 [ 38.447310] memcg:ffff888009a8ea01 [ 38.447746] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.448399] page_type: 0xffffffff() [ 38.448852] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.449799] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a8ea01 [ 38.450730] page dumped because: kasan: bad access detected [ 38.451400] [ 38.451620] Memory state around the buggy address: [ 38.452211] ffff888018f60680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.453072] ffff888018f60700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.453968] >ffff888018f60780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.454876] ^ [ 38.455385] ffff888018f60800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.456250] ffff888018f60880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.457119] ================================================================== [ 38.458102] Disabling lock debugging due to kernel taint [ 40.395747] BUG: Bad rss-counter state mm:0000000066ce8ef3 type:MM_FILEPAGES val:33 [ 40.397511] BUG: Bad rss-counter state mm:0000000066ce8ef3 type:MM_ANONPAGES val:22 [ 40.858012] BUG: Bad rss-counter state mm:000000001558950f type:MM_FILEPAGES val:33 [ 40.859752] BUG: Bad rss-counter state mm:000000001558950f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62951' (ECDSA) to the list of known hosts. 2023/06/19 17:45:08 fuzzer started 2023/06/19 17:45:09 dialing manager at localhost:44161 2023/06/19 17:45:09 checking machine... 2023/06/19 17:45:09 checking revisions... [ 41.578367] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:45:09 testing simple program... [ 41.626840] cgroup: Unknown subsys name 'net' [ 41.677749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:45:01 Registers: info registers vcpu 0 RAX=1ffffffff0bbf9fb RBX=ffffffff85dfcfd8 RCX=ffffffff8180f43a RDX=0000000000000000 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff88806ce099e0 R8 =ffffffff86137dcc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfcfdc R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f6423faf900 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=00007f86a1b78360 CR3=0000000016b16000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f6424566618 CR3=000000000c6ae000 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=2038303a35343a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a35343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000