syzkaller login: [ 30.619969] BUG: Bad rss-counter state mm:000000000ac8ab8d type:MM_FILEPAGES val:33 [ 30.620977] BUG: Bad rss-counter state mm:000000000ac8ab8d type:MM_ANONPAGES val:22 [ 30.798901] ================================================================== [ 30.799813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.800744] Read of size 8 at addr ffff888019410968 by task sshd/221 [ 30.801509] [ 30.801728] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.802770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.803738] Call Trace: [ 30.804055] [ 30.804339] dump_stack_lvl+0x91/0xf0 [ 30.804853] print_report+0xcc/0x620 [ 30.805336] ? __virt_addr_valid+0x102/0x340 [ 30.805890] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.806508] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.807133] kasan_report+0xbe/0xf0 [ 30.807607] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808250] vma_interval_tree_remove+0xc75/0xec0 [ 30.808857] vma_prepare+0xc54/0x11a0 [ 30.809343] __split_vma+0x5af/0x950 [ 30.809819] ? __pfx___split_vma+0x10/0x10 [ 30.810351] ? find_held_lock+0x2c/0x110 [ 30.810891] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.811468] ? lock_is_held_type+0x9f/0x120 [ 30.812014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.812630] ? mtree_range_walk+0x632/0x900 [ 30.813194] ? mas_walk+0x5c7/0x7c0 [ 30.813681] do_vmi_munmap+0x1f1/0x2b0 [ 30.814177] mmap_region+0x1f9/0x2660 [ 30.814665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.815186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.815893] ? __pfx_lock_acquire+0x10/0x10 [ 30.816424] ? __pfx_mmap_region+0x10/0x10 [ 30.816953] ? security_mmap_addr+0x7d/0xa0 [ 30.817487] ? get_unmapped_area+0x1f5/0x3f0 [ 30.818037] do_mmap+0x854/0xf00 [ 30.818484] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.818995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.819559] ksys_mmap_pgoff+0x3af/0x500 [ 30.820063] do_syscall_64+0x3f/0x90 [ 30.820541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821187] RIP: 0033:0x7f8f99487d82 [ 30.821640] 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 [ 30.823758] RSP: 002b:00007fffef303028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.824654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f99487d82 [ 30.825495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f988c1000 [ 30.826336] RBP: 00007f8f988c1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.827183] R10: 0000000000000812 R11: 0000000000000206 R12: 000055561dbc8f70 [ 30.828020] R13: 00007fffef303040 R14: 00007fffef303070 R15: 00007fffef3033d0 [ 30.828878] [ 30.829170] [ 30.829387] Allocated by task 214: [ 30.829813] kasan_save_stack+0x22/0x50 [ 30.830314] kasan_set_track+0x25/0x30 [ 30.830826] __kasan_slab_alloc+0x59/0x70 [ 30.831353] kmem_cache_alloc+0x16b/0x370 [ 30.831866] vm_area_dup+0x20/0x160 [ 30.832323] __split_vma+0x170/0x950 [ 30.832788] split_vma+0xc6/0x110 [ 30.833235] mprotect_fixup+0x8d2/0xb30 [ 30.833739] do_mprotect_pkey+0x87e/0xd40 [ 30.834263] __x64_sys_mprotect+0x78/0xc0 [ 30.834794] do_syscall_64+0x3f/0x90 [ 30.835273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835912] [ 30.836129] Freed by task 214: [ 30.836520] kasan_save_stack+0x22/0x50 [ 30.837021] kasan_set_track+0x25/0x30 [ 30.837514] kasan_save_free_info+0x2b/0x50 [ 30.838046] __kasan_slab_free+0x10a/0x190 [ 30.838578] kmem_cache_free+0x10d/0x4d0 [ 30.839100] rcu_core+0x8c8/0x2860 [ 30.839548] __do_softirq+0x1b7/0x7d4 [ 30.840025] [ 30.840243] Last potentially related work creation: [ 30.840825] kasan_save_stack+0x22/0x50 [ 30.841331] __kasan_record_aux_stack+0x8e/0xa0 [ 30.841901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842538] remove_vma+0x139/0x170 [ 30.843000] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.843602] do_vmi_munmap+0x1f1/0x2b0 [ 30.844090] __vm_munmap+0x138/0x3a0 [ 30.844559] __x64_sys_munmap+0x59/0x80 [ 30.845068] do_syscall_64+0x3f/0x90 [ 30.845549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846194] [ 30.846411] The buggy address belongs to the object at ffff888019410910 [ 30.846411] which belongs to the cache vm_area_struct of size 168 [ 30.847888] The buggy address is located 88 bytes inside of [ 30.847888] freed 168-byte region [ffff888019410910, ffff8880194109b8) [ 30.849288] [ 30.849504] The buggy address belongs to the physical page: [ 30.850156] page:000000003e4c8605 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19410 [ 30.851248] memcg:ffff88800ef3c301 [ 30.851677] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.852315] page_type: 0xffffffff() [ 30.852763] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.853674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef3c301 [ 30.854575] page dumped because: kasan: bad access detected [ 30.855248] [ 30.855465] Memory state around the buggy address: [ 30.856040] ffff888019410800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.856885] ffff888019410880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.857755] >ffff888019410900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.858609] ^ [ 30.859404] ffff888019410980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.860255] ffff888019410a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861101] ================================================================== [ 30.862018] Disabling lock debugging due to kernel taint [ 32.892111] BUG: Bad rss-counter state mm:00000000c2e0d605 type:MM_FILEPAGES val:33 [ 32.892877] BUG: Bad rss-counter state mm:00000000c2e0d605 type:MM_ANONPAGES val:22 [ 33.296298] BUG: Bad rss-counter state mm:000000005c78c808 type:MM_FILEPAGES val:33 [ 33.296933] BUG: Bad rss-counter state mm:000000005c78c808 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62859' (ECDSA) to the list of known hosts. 2023/06/20 21:36:03 fuzzer started 2023/06/20 21:36:03 dialing manager at localhost:36067 2023/06/20 21:36:03 checking machine... 2023/06/20 21:36:03 checking revisions... [ 34.025504] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:36:03 testing simple program... [ 34.081231] cgroup: Unknown subsys name 'net' [ 34.137875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:03 Registers: info registers vcpu 0 RAX=ffffffff861436df RBX=0000000000000001 RCX=ffffffff861436da RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880183dfa18 RSP=ffff8880183df950 R8 =ffffffff861436de R9 =ffff8880183dfa00 R10=0000000000038001 R11=00000000000229a3 R12=ffff8880183dfa20 R13=ffff8880183dfa08 R14=ffff8880183dfa01 R15=ffff8880183df9c0 RIP=ffffffff81130abf 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 00007f1ad6620900 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=00007f1ad6bd7618 CR3=000000000ed34000 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=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000035000 RSP=ffff888008e07e58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff845123eb RFL=00000046 [---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 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=00007ff4b8972a90 CR3=000000000c978000 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=e1181a239bb69586454c7b9cf4822bd6 XMM02=2c67c8bc2e329bc3000000000011c7b8 XMM03=fb795ef6d65770560000000000123488 XMM04=6cadc6ed2fdfd0f300000000000ae988 XMM05=859fc098af6337d500000000001340b8 XMM06=c291bd5c70af25b90000000000133158 XMM07=e042d86d42eb936e0000000000123e70 XMM08=22332ca9e071f0b3000000000011c818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000