syzkaller login: [ 30.256147] BUG: Bad rss-counter state mm:000000006daf9fc1 type:MM_FILEPAGES val:33 [ 30.257163] BUG: Bad rss-counter state mm:000000006daf9fc1 type:MM_ANONPAGES val:22 [ 30.422454] ================================================================== [ 30.423381] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.424335] Read of size 8 at addr ffff88801832ba50 by task sshd/219 [ 30.425105] [ 30.425346] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.426339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.427340] Call Trace: [ 30.427664] [ 30.427956] dump_stack_lvl+0x91/0xf0 [ 30.428482] print_report+0xcc/0x620 [ 30.429024] ? __virt_addr_valid+0x102/0x340 [ 30.429654] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.430383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.431067] kasan_report+0xbe/0xf0 [ 30.431638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.432375] vma_interval_tree_remove+0xc75/0xec0 [ 30.433080] vma_prepare+0xc54/0x11a0 [ 30.433651] __split_vma+0x5af/0x950 [ 30.434221] ? __pfx___split_vma+0x10/0x10 [ 30.434857] ? find_held_lock+0x2c/0x110 [ 30.435498] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.436124] ? lock_is_held_type+0x9f/0x120 [ 30.436687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.437320] ? mtree_range_walk+0x632/0x900 [ 30.437891] ? mas_walk+0x5c7/0x7c0 [ 30.438418] do_vmi_munmap+0x1f1/0x2b0 [ 30.438918] mmap_region+0x1f9/0x2660 [ 30.439439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.439953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.440699] ? __pfx_lock_acquire+0x10/0x10 [ 30.441247] ? __pfx_mmap_region+0x10/0x10 [ 30.441797] ? security_mmap_addr+0x7d/0xa0 [ 30.442370] ? get_unmapped_area+0x1f5/0x3f0 [ 30.442934] do_mmap+0x854/0xf00 [ 30.443415] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.443925] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.444518] ksys_mmap_pgoff+0x3af/0x500 [ 30.445039] do_syscall_64+0x3f/0x90 [ 30.445544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.446217] RIP: 0033:0x7fc46219fd82 [ 30.446696] 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 [ 30.448914] RSP: 002b:00007ffe295ce6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.449859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc46219fd82 [ 30.450760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4615d9000 [ 30.451653] RBP: 00007fc4615d9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.452550] R10: 0000000000000812 R11: 0000000000000206 R12: 000055996929db20 [ 30.453422] R13: 00007ffe295ce6c0 R14: 00007ffe295ce6f0 R15: 00007ffe295cea50 [ 30.454325] [ 30.454632] [ 30.454851] Allocated by task 212: [ 30.455306] kasan_save_stack+0x22/0x50 [ 30.455829] kasan_set_track+0x25/0x30 [ 30.456366] __kasan_slab_alloc+0x59/0x70 [ 30.456906] kmem_cache_alloc+0x16b/0x370 [ 30.457459] vm_area_dup+0x20/0x160 [ 30.457922] __split_vma+0x170/0x950 [ 30.458428] split_vma+0xc6/0x110 [ 30.458878] mprotect_fixup+0x8d2/0xb30 [ 30.459408] do_mprotect_pkey+0x87e/0xd40 [ 30.459945] __x64_sys_mprotect+0x78/0xc0 [ 30.460505] do_syscall_64+0x3f/0x90 [ 30.460998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.461673] [ 30.461898] Freed by task 212: [ 30.462333] kasan_save_stack+0x22/0x50 [ 30.462855] kasan_set_track+0x25/0x30 [ 30.463374] kasan_save_free_info+0x2b/0x50 [ 30.463926] __kasan_slab_free+0x10a/0x190 [ 30.464500] kmem_cache_free+0x10d/0x4d0 [ 30.465030] rcu_core+0x8c8/0x2860 [ 30.465500] __do_softirq+0x1b7/0x7d4 [ 30.465990] [ 30.466225] Last potentially related work creation: [ 30.466841] kasan_save_stack+0x22/0x50 [ 30.467366] __kasan_record_aux_stack+0x8e/0xa0 [ 30.467947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.468629] remove_vma+0x139/0x170 [ 30.469097] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.469690] do_vmi_munmap+0x1f1/0x2b0 [ 30.470205] __vm_munmap+0x138/0x3a0 [ 30.470690] __x64_sys_munmap+0x59/0x80 [ 30.471198] do_syscall_64+0x3f/0x90 [ 30.471697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.472380] [ 30.472602] Second to last potentially related work creation: [ 30.473314] kasan_save_stack+0x22/0x50 [ 30.473831] __kasan_record_aux_stack+0x8e/0xa0 [ 30.474456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.475109] remove_vma+0x139/0x170 [ 30.475587] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.476157] do_vmi_munmap+0x1f1/0x2b0 [ 30.476676] mmap_region+0x1f9/0x2660 [ 30.477163] do_mmap+0x854/0xf00 [ 30.477619] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.478124] ksys_mmap_pgoff+0x3af/0x500 [ 30.478653] do_syscall_64+0x3f/0x90 [ 30.479142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.479810] [ 30.480030] The buggy address belongs to the object at ffff88801832b9f8 [ 30.480030] which belongs to the cache vm_area_struct of size 168 [ 30.481570] The buggy address is located 88 bytes inside of [ 30.481570] freed 168-byte region [ffff88801832b9f8, ffff88801832baa0) [ 30.483052] [ 30.483288] The buggy address belongs to the physical page: [ 30.483959] page:000000004d3d2c98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1832b [ 30.485087] memcg:ffff88800fbf2301 [ 30.485538] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.486218] page_type: 0xffffffff() [ 30.486705] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7dc0 dead000000000002 [ 30.487682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbf2301 [ 30.488641] page dumped because: kasan: bad access detected [ 30.489330] [ 30.489554] Memory state around the buggy address: [ 30.490168] ffff88801832b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.491053] ffff88801832b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.491946] >ffff88801832ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.492844] ^ [ 30.493574] ffff88801832ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.494487] ffff88801832bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.495372] ================================================================== [ 30.496401] Disabling lock debugging due to kernel taint [ 32.560863] BUG: Bad rss-counter state mm:000000004fe9bb6d type:MM_FILEPAGES val:33 [ 32.562593] BUG: Bad rss-counter state mm:000000004fe9bb6d type:MM_ANONPAGES val:22 [ 32.968414] BUG: Bad rss-counter state mm:00000000bae72841 type:MM_FILEPAGES val:33 [ 32.969127] BUG: Bad rss-counter state mm:00000000bae72841 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30171' (ECDSA) to the list of known hosts. 2023/06/20 10:52:29 fuzzer started 2023/06/20 10:52:29 dialing manager at localhost:36067 2023/06/20 10:52:29 checking machine... 2023/06/20 10:52:29 checking revisions... [ 33.645213] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:52:29 testing simple program... [ 33.675031] cgroup: Unknown subsys name 'net' [ 33.718863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:52:28 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=00007ffef96e5878 CR3=0000000019d0a000 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=2038323a32353a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001b55edb RSP=ffff88800daaf6c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88801a2024c0 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f0dcf23d900 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=00007fd92d446650 CR3=000000000c500000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=acdcd44402db69c100000000000ae988 XMM05=e25418e0962afa1e0000000000133c00 XMM06=806171799158d9670000000000132a00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000