syzkaller login: [ 31.671896] BUG: Bad rss-counter state mm:00000000a446c06d type:MM_FILEPAGES val:33 [ 31.672725] BUG: Bad rss-counter state mm:00000000a446c06d type:MM_ANONPAGES val:22 [ 31.799128] ================================================================== [ 31.799759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.800395] Read of size 8 at addr ffff88800d691d08 by task sshd/220 [ 31.800971] [ 31.801119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.801687] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.802317] Call Trace: [ 31.802532] <TASK> [ 31.802729] dump_stack_lvl+0x91/0xf0 [ 31.803063] print_report+0xcc/0x620 [ 31.803587] ? __virt_addr_valid+0x102/0x340 [ 31.803974] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.804437] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.804888] kasan_report+0xbe/0xf0 [ 31.805229] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.805700] vma_interval_tree_remove+0xc75/0xec0 [ 31.806105] vma_prepare+0xc54/0x11a0 [ 31.806420] __split_vma+0x5af/0x950 [ 31.806746] ? __pfx___split_vma+0x10/0x10 [ 31.807101] ? find_held_lock+0x2c/0x110 [ 31.807458] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.807896] ? lock_is_held_type+0x9f/0x120 [ 31.808262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.808736] ? mtree_range_walk+0x632/0x900 [ 31.809108] ? mas_walk+0x5c7/0x7c0 [ 31.809435] do_vmi_munmap+0x1f1/0x2b0 [ 31.809794] mmap_region+0x1f9/0x2660 [ 31.810160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.810523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.811009] ? __pfx_lock_acquire+0x10/0x10 [ 31.811375] ? __pfx_mmap_region+0x10/0x10 [ 31.811747] ? security_mmap_addr+0x7d/0xa0 [ 31.812116] ? get_unmapped_area+0x1f5/0x3f0 [ 31.812589] do_mmap+0x854/0xf00 [ 31.812894] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.813220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.813590] ksys_mmap_pgoff+0x3af/0x500 [ 31.813937] do_syscall_64+0x3f/0x90 [ 31.814284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.814735] RIP: 0033:0x7f6f2d6c8d82 [ 31.815051] 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 [ 31.816565] RSP: 002b:00007ffd5e62bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.817199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f2d6c8d82 [ 31.817810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f2cb02000 [ 31.818406] RBP: 00007f6f2cb02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.818999] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b913e8ec0 [ 31.819600] R13: 00007ffd5e62bb80 R14: 00007ffd5e62bbb0 R15: 00007ffd5e62bf10 [ 31.820216] </TASK> [ 31.820421] [ 31.820620] Allocated by task 213: [ 31.820921] kasan_save_stack+0x22/0x50 [ 31.821278] kasan_set_track+0x25/0x30 [ 31.821640] __kasan_slab_alloc+0x59/0x70 [ 31.822002] kmem_cache_alloc+0x16b/0x370 [ 31.822361] vm_area_dup+0x20/0x160 [ 31.822692] __split_vma+0x170/0x950 [ 31.823021] split_vma+0xc6/0x110 [ 31.823317] mprotect_fixup+0x8d2/0xb30 [ 31.823680] do_mprotect_pkey+0x87e/0xd40 [ 31.824045] __x64_sys_mprotect+0x78/0xc0 [ 31.824415] do_syscall_64+0x3f/0x90 [ 31.824754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825199] [ 31.825347] Freed by task 213: [ 31.825640] kasan_save_stack+0x22/0x50 [ 31.825991] kasan_set_track+0x25/0x30 [ 31.826338] kasan_save_free_info+0x2b/0x50 [ 31.826712] __kasan_slab_free+0x10a/0x190 [ 31.827090] kmem_cache_free+0x10d/0x4d0 [ 31.827439] rcu_core+0x8c8/0x2860 [ 31.827744] __do_softirq+0x1b7/0x7d4 [ 31.828080] [ 31.828231] Last potentially related work creation: [ 31.828683] kasan_save_stack+0x22/0x50 [ 31.829011] __kasan_record_aux_stack+0x8e/0xa0 [ 31.829401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.829850] remove_vma+0x139/0x170 [ 31.830160] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.830560] do_vmi_munmap+0x1f1/0x2b0 [ 31.830880] __vm_munmap+0x138/0x3a0 [ 31.831204] __x64_sys_munmap+0x59/0x80 [ 31.831551] do_syscall_64+0x3f/0x90 [ 31.831871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.832316] [ 31.832482] The buggy address belongs to the object at ffff88800d691cb0 [ 31.832482] which belongs to the cache vm_area_struct of size 168 [ 31.833564] The buggy address is located 88 bytes inside of [ 31.833564] freed 168-byte region [ffff88800d691cb0, ffff88800d691d58) [ 31.834528] [ 31.834683] The buggy address belongs to the physical page: [ 31.835117] page:0000000080d9dc74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd691 [ 31.835866] memcg:ffff88800d0cf701 [ 31.836162] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.836671] page_type: 0xffffffff() [ 31.836988] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.837615] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0cf701 [ 31.838222] page dumped because: kasan: bad access detected [ 31.838663] [ 31.838803] Memory state around the buggy address: [ 31.839178] ffff88800d691c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.839760] ffff88800d691c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.840328] >ffff88800d691d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.840917] ^ [ 31.841201] ffff88800d691d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.841775] ffff88800d691e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.842332] ================================================================== [ 31.843071] Disabling lock debugging due to kernel taint [ 33.849515] BUG: Bad rss-counter state mm:00000000f2cd77e3 type:MM_FILEPAGES val:33 [ 33.850260] BUG: Bad rss-counter state mm:00000000f2cd77e3 type:MM_ANONPAGES val:22 [ 34.224257] BUG: Bad rss-counter state mm:000000009da26ced type:MM_FILEPAGES val:33 [ 34.224991] BUG: Bad rss-counter state mm:000000009da26ced type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62148' (ECDSA) to the list of known hosts. 2023/06/20 09:03:45 fuzzer started 2023/06/20 09:03:45 dialing manager at localhost:44161 2023/06/20 09:03:45 checking machine... 2023/06/20 09:03:45 checking revisions... [ 34.830391] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:03:46 testing simple program... [ 34.868659] cgroup: Unknown subsys name 'net' [ 34.916367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fffcbd07d38 CR3=0000000005482000 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=00007f1c0a34d510000055b19aefb790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c76d10 RBX=0000000000000001 RCX=ffffffff863b6880 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b6882 RBP=ffff888009b275d8 RSP=ffff888009b27510 R8 =ffffffff863b6884 R9 =ffff888009b275c0 R10=0000000000038001 R11=000000000008b61a R12=ffff888009b275e0 R13=ffff888009b275c8 R14=ffff888009b279a0 R15=ffff888009b27580 RIP=ffffffff811311c7 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 00007f398f865900 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=00007f398fe1c618 CR3=000000000fd00000 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