syzkaller login: [ 31.455487] BUG: Bad rss-counter state mm:0000000075d6beba type:MM_FILEPAGES val:33 [ 31.457231] BUG: Bad rss-counter state mm:0000000075d6beba type:MM_ANONPAGES val:22 [ 31.626224] ================================================================== [ 31.627147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.628279] Read of size 8 at addr ffff888010318880 by task sshd/221 [ 31.629113] [ 31.629331] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.630208] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.631224] Call Trace: [ 31.631552] <TASK> [ 31.631838] dump_stack_lvl+0x91/0xf0 [ 31.632331] print_report+0xcc/0x620 [ 31.632848] ? __virt_addr_valid+0x102/0x340 [ 31.633406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.634031] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.634656] kasan_report+0xbe/0xf0 [ 31.635136] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.635766] vma_interval_tree_remove+0xc75/0xec0 [ 31.636377] vma_prepare+0xc54/0x11a0 [ 31.636870] __split_vma+0x5af/0x950 [ 31.637344] ? __pfx___split_vma+0x10/0x10 [ 31.637876] ? find_held_lock+0x2c/0x110 [ 31.638398] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.638973] ? lock_is_held_type+0x9f/0x120 [ 31.639516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.640131] ? mtree_range_walk+0x632/0x900 [ 31.640699] ? mas_walk+0x5c7/0x7c0 [ 31.641180] do_vmi_munmap+0x1f1/0x2b0 [ 31.641686] mmap_region+0x1f9/0x2660 [ 31.642167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.642692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.643416] ? __pfx_lock_acquire+0x10/0x10 [ 31.643952] ? __pfx_mmap_region+0x10/0x10 [ 31.644487] ? security_mmap_addr+0x7d/0xa0 [ 31.645049] ? get_unmapped_area+0x1f5/0x3f0 [ 31.645602] do_mmap+0x854/0xf00 [ 31.646049] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.646547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.647121] ksys_mmap_pgoff+0x3af/0x500 [ 31.647635] do_syscall_64+0x3f/0x90 [ 31.648118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.648808] RIP: 0033:0x7f9f79390d82 [ 31.649288] 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 [ 31.651505] RSP: 002b:00007fff439e8ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.652439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f79390d82 [ 31.653310] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f787ca000 [ 31.654176] RBP: 00007f9f787ca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.655084] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a13cd40ec0 [ 31.656001] R13: 00007fff439e8ae0 R14: 00007fff439e8b10 R15: 00007fff439e8e70 [ 31.656910] </TASK> [ 31.657216] [ 31.657441] Allocated by task 214: [ 31.657894] kasan_save_stack+0x22/0x50 [ 31.658406] kasan_set_track+0x25/0x30 [ 31.658913] __kasan_slab_alloc+0x59/0x70 [ 31.659447] kmem_cache_alloc+0x16b/0x370 [ 31.659978] vm_area_dup+0x20/0x160 [ 31.660454] __split_vma+0x170/0x950 [ 31.660962] split_vma+0xc6/0x110 [ 31.661415] mprotect_fixup+0x8d2/0xb30 [ 31.661924] do_mprotect_pkey+0x87e/0xd40 [ 31.662457] __x64_sys_mprotect+0x78/0xc0 [ 31.663015] do_syscall_64+0x3f/0x90 [ 31.663528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.664192] [ 31.664411] Freed by task 214: [ 31.664825] kasan_save_stack+0x22/0x50 [ 31.665336] kasan_set_track+0x25/0x30 [ 31.665840] kasan_save_free_info+0x2b/0x50 [ 31.666372] __kasan_slab_free+0x10a/0x190 [ 31.666913] kmem_cache_free+0x10d/0x4d0 [ 31.667432] rcu_core+0x8c8/0x2860 [ 31.667880] __do_softirq+0x1b7/0x7d4 [ 31.668360] [ 31.668574] Last potentially related work creation: [ 31.669264] kasan_save_stack+0x22/0x50 [ 31.669774] __kasan_record_aux_stack+0x8e/0xa0 [ 31.670353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.671005] remove_vma+0x139/0x170 [ 31.671462] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.672053] do_vmi_munmap+0x1f1/0x2b0 [ 31.672566] __vm_munmap+0x138/0x3a0 [ 31.673068] __x64_sys_munmap+0x59/0x80 [ 31.673577] do_syscall_64+0x3f/0x90 [ 31.674069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.674745] [ 31.674966] The buggy address belongs to the object at ffff888010318828 [ 31.674966] which belongs to the cache vm_area_struct of size 168 [ 31.676525] The buggy address is located 88 bytes inside of [ 31.676525] freed 168-byte region [ffff888010318828, ffff8880103188d0) [ 31.677996] [ 31.678219] The buggy address belongs to the physical page: [ 31.678908] page:00000000dce895ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10318 [ 31.680050] memcg:ffff8880146ac701 [ 31.680507] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.681212] page_type: 0xffffffff() [ 31.681692] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.682635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146ac701 [ 31.683582] page dumped because: kasan: bad access detected [ 31.684267] [ 31.684484] Memory state around the buggy address: [ 31.685111] ffff888010318780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.686005] ffff888010318800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.686880] >ffff888010318880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.687785] ^ [ 31.688202] ffff888010318900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.689069] ffff888010318980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.689928] ================================================================== [ 31.690846] Disabling lock debugging due to kernel taint [ 33.663341] BUG: Bad rss-counter state mm:00000000338cd7e1 type:MM_FILEPAGES val:33 [ 33.665477] BUG: Bad rss-counter state mm:00000000338cd7e1 type:MM_ANONPAGES val:22 [ 34.213987] BUG: Bad rss-counter state mm:00000000171f9178 type:MM_FILEPAGES val:33 [ 34.214970] BUG: Bad rss-counter state mm:00000000171f9178 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54800' (ECDSA) to the list of known hosts. 2023/06/20 22:31:56 fuzzer started 2023/06/20 22:31:56 dialing manager at localhost:36067 2023/06/20 22:31:56 checking machine... 2023/06/20 22:31:56 checking revisions... [ 34.838102] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:31:56 testing simple program... [ 34.888145] cgroup: Unknown subsys name 'net' [ 34.947891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:31:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180effd RDX=00000000000080ef RSI=00000000000080ef RDI=ffffffff86509dac RBP=ffff88801465f930 RSP=ffff88801465f868 R8 =0000000000000000 R9 =ffff88801465f918 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801465f938 R13=ffff88801465f920 R14=ffff88801465f919 R15=ffff88801465f8d8 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f4ac2608900 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=00007f4ac2bbf618 CR3=0000000015f88000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f299453aed0 CR3=000000000d802000 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=fff8d853c17b49a317472e078bc8abb3 XMM02=000000000011a9b0eff9b2d0a8fce9cb XMM03=000000000011aa802c67c8bc2e329bc3 XMM04=13407c28b9b64a0500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131d80 XMM06=d1d882f6e3fef7350000000000130be8 XMM07=e042d86d42eb936e00000000001221e0 XMM08=9784c680ecfcd490000000000011aa80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000