syzkaller login: [ 47.022003] BUG: Bad rss-counter state mm:00000000a6810649 type:MM_FILEPAGES val:33 [ 47.024363] BUG: Bad rss-counter state mm:00000000a6810649 type:MM_ANONPAGES val:22 [ 47.267246] ================================================================== [ 47.267852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.268459] Read of size 8 at addr ffff888016c61058 by task sshd/220 [ 47.268983] [ 47.269142] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.269711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.270393] Call Trace: [ 47.270624] <TASK> [ 47.270808] dump_stack_lvl+0x91/0xf0 [ 47.271113] print_report+0xcc/0x620 [ 47.271623] ? __virt_addr_valid+0x102/0x340 [ 47.271971] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.272403] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.272806] kasan_report+0xbe/0xf0 [ 47.273107] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.273503] vma_interval_tree_remove+0xc75/0xec0 [ 47.273921] vma_prepare+0xc54/0x11a0 [ 47.274267] __split_vma+0x5af/0x950 [ 47.274606] ? __pfx___split_vma+0x10/0x10 [ 47.274967] ? find_held_lock+0x2c/0x110 [ 47.275318] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.275694] ? lock_is_held_type+0x9f/0x120 [ 47.276052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.276466] ? mtree_range_walk+0x632/0x900 [ 47.276849] ? mas_walk+0x5c7/0x7c0 [ 47.277157] do_vmi_munmap+0x1f1/0x2b0 [ 47.277478] mmap_region+0x1f9/0x2660 [ 47.277797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.278155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.278652] ? __pfx_lock_acquire+0x10/0x10 [ 47.279021] ? __pfx_mmap_region+0x10/0x10 [ 47.279384] ? security_mmap_addr+0x7d/0xa0 [ 47.279745] ? get_unmapped_area+0x1f5/0x3f0 [ 47.280120] do_mmap+0x854/0xf00 [ 47.280430] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.280754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.281120] ksys_mmap_pgoff+0x3af/0x500 [ 47.281456] do_syscall_64+0x3f/0x90 [ 47.281793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.282271] RIP: 0033:0x7f38511efd82 [ 47.282570] 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 [ 47.283934] RSP: 002b:00007ffc09e7a348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.284514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38511efd82 [ 47.285057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3850629000 [ 47.285601] RBP: 00007f3850629000 R08: 0000000000000009 R09: 0000000000001000 [ 47.286169] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558846183ec0 [ 47.286711] R13: 00007ffc09e7a360 R14: 00007ffc09e7a390 R15: 00007ffc09e7a6f0 [ 47.287253] </TASK> [ 47.287437] [ 47.287573] Allocated by task 213: [ 47.287843] kasan_save_stack+0x22/0x50 [ 47.288170] kasan_set_track+0x25/0x30 [ 47.288500] __kasan_slab_alloc+0x59/0x70 [ 47.288869] kmem_cache_alloc+0x16b/0x370 [ 47.289234] vm_area_dup+0x20/0x160 [ 47.289540] __split_vma+0x170/0x950 [ 47.289854] split_vma+0xc6/0x110 [ 47.290198] mprotect_fixup+0x8d2/0xb30 [ 47.290552] do_mprotect_pkey+0x87e/0xd40 [ 47.290923] __x64_sys_mprotect+0x78/0xc0 [ 47.291266] do_syscall_64+0x3f/0x90 [ 47.291580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.292015] [ 47.292171] Freed by task 213: [ 47.292438] kasan_save_stack+0x22/0x50 [ 47.292763] kasan_set_track+0x25/0x30 [ 47.293083] kasan_save_free_info+0x2b/0x50 [ 47.293424] __kasan_slab_free+0x10a/0x190 [ 47.293769] kmem_cache_free+0x10d/0x4d0 [ 47.294117] rcu_core+0x8c8/0x2860 [ 47.294403] __do_softirq+0x1b7/0x7d4 [ 47.294712] [ 47.294853] Last potentially related work creation: [ 47.295228] kasan_save_stack+0x22/0x50 [ 47.295586] __kasan_record_aux_stack+0x8e/0xa0 [ 47.295966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.296376] remove_vma+0x139/0x170 [ 47.296672] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.297073] do_vmi_munmap+0x1f1/0x2b0 [ 47.297411] __vm_munmap+0x138/0x3a0 [ 47.297713] __x64_sys_munmap+0x59/0x80 [ 47.298036] do_syscall_64+0x3f/0x90 [ 47.298359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.298774] [ 47.298915] The buggy address belongs to the object at ffff888016c61000 [ 47.298915] which belongs to the cache vm_area_struct of size 168 [ 47.299824] The buggy address is located 88 bytes inside of [ 47.299824] freed 168-byte region [ffff888016c61000, ffff888016c610a8) [ 47.300705] [ 47.300849] The buggy address belongs to the physical page: [ 47.301286] page:0000000011e94497 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c61 [ 47.301986] memcg:ffff88801664cb01 [ 47.302320] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.302767] page_type: 0xffffffff() [ 47.303068] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.303677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801664cb01 [ 47.304274] page dumped because: kasan: bad access detected [ 47.304723] [ 47.304869] Memory state around the buggy address: [ 47.305258] ffff888016c60f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 47.305837] ffff888016c60f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.306447] >ffff888016c61000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.307017] ^ [ 47.307501] ffff888016c61080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 47.308052] ffff888016c61100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.308604] ================================================================== [ 47.309263] Disabling lock debugging due to kernel taint [ 49.261691] BUG: Bad rss-counter state mm:00000000468b536a type:MM_FILEPAGES val:33 [ 49.262333] BUG: Bad rss-counter state mm:00000000468b536a type:MM_ANONPAGES val:22 [ 49.571328] BUG: Bad rss-counter state mm:000000000fbf5053 type:MM_FILEPAGES val:33 [ 49.572661] BUG: Bad rss-counter state mm:000000000fbf5053 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57171' (ECDSA) to the list of known hosts. 2023/06/20 09:30:38 fuzzer started 2023/06/20 09:30:38 dialing manager at localhost:44161 2023/06/20 09:30:38 checking machine... 2023/06/20 09:30:38 checking revisions... [ 50.116498] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:30:39 testing simple program... [ 50.175414] cgroup: Unknown subsys name 'net' [ 50.240209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:30:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed1002db9f00 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888016dcf7f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce3de20 R15=0000000000000000 RIP=ffffffff812d8fe1 RFL=00000086 [--S--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 00007f8aa3c28700 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=00007f8bd834b0b0 CR3=0000000016a6e000 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=2038333a30333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a30333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e032640 RCX=ffffffff83676da8 RDX=ffff8880169b8000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff8880180af7e0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800e032698 R13=0000000000000000 R14=ffff88800f1f1579 R15=ffff88800f1f1600 RIP=ffffffff814c01fc 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 00007f8bd7d93900 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=00007f8bd834a618 CR3=000000001a35c000 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=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