syzkaller login: [ 30.565817] BUG: Bad rss-counter state mm:00000000095c123d type:MM_FILEPAGES val:33 [ 30.566996] BUG: Bad rss-counter state mm:00000000095c123d type:MM_ANONPAGES val:22 [ 30.721720] ================================================================== [ 30.722625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.723580] Read of size 8 at addr ffff888015e5c968 by task sshd/220 [ 30.724454] [ 30.724677] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.725555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.726552] Call Trace: [ 30.726895] [ 30.727194] dump_stack_lvl+0x91/0xf0 [ 30.727690] print_report+0xcc/0x620 [ 30.728176] ? __virt_addr_valid+0x102/0x340 [ 30.728745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729391] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730014] kasan_report+0xbe/0xf0 [ 30.730503] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731129] vma_interval_tree_remove+0xc75/0xec0 [ 30.731733] vma_prepare+0xc54/0x11a0 [ 30.732208] __split_vma+0x5af/0x950 [ 30.732675] ? __pfx___split_vma+0x10/0x10 [ 30.733230] ? find_held_lock+0x2c/0x110 [ 30.733751] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.734315] ? lock_is_held_type+0x9f/0x120 [ 30.734853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.735461] ? mtree_range_walk+0x632/0x900 [ 30.736015] ? mas_walk+0x5c7/0x7c0 [ 30.736487] do_vmi_munmap+0x1f1/0x2b0 [ 30.736980] mmap_region+0x1f9/0x2660 [ 30.737484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.738713] ? __pfx_lock_acquire+0x10/0x10 [ 30.739265] ? __pfx_mmap_region+0x10/0x10 [ 30.739807] ? security_mmap_addr+0x7d/0xa0 [ 30.740340] ? get_unmapped_area+0x1f5/0x3f0 [ 30.740883] do_mmap+0x854/0xf00 [ 30.741338] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.742408] ksys_mmap_pgoff+0x3af/0x500 [ 30.742912] do_syscall_64+0x3f/0x90 [ 30.743391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.744053] RIP: 0033:0x7feeb2916d82 [ 30.744506] 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 [ 30.746672] RSP: 002b:00007ffd621ef6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.747562] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feeb2916d82 [ 30.748412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feeb1d50000 [ 30.749264] RBP: 00007feeb1d50000 R08: 0000000000000009 R09: 0000000000001000 [ 30.750164] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5be8f7ec0 [ 30.751014] R13: 00007ffd621ef6f0 R14: 00007ffd621ef720 R15: 00007ffd621efa80 [ 30.751875] [ 30.752171] [ 30.752393] Allocated by task 213: [ 30.752815] kasan_save_stack+0x22/0x50 [ 30.753334] kasan_set_track+0x25/0x30 [ 30.753828] __kasan_slab_alloc+0x59/0x70 [ 30.754352] kmem_cache_alloc+0x16b/0x370 [ 30.754880] vm_area_dup+0x20/0x160 [ 30.755333] __split_vma+0x170/0x950 [ 30.755794] split_vma+0xc6/0x110 [ 30.756230] mprotect_fixup+0x8d2/0xb30 [ 30.756730] do_mprotect_pkey+0x87e/0xd40 [ 30.757275] __x64_sys_mprotect+0x78/0xc0 [ 30.757790] do_syscall_64+0x3f/0x90 [ 30.758261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758901] [ 30.759117] Freed by task 213: [ 30.759507] kasan_save_stack+0x22/0x50 [ 30.760011] kasan_set_track+0x25/0x30 [ 30.760504] kasan_save_free_info+0x2b/0x50 [ 30.761031] __kasan_slab_free+0x10a/0x190 [ 30.761579] kmem_cache_free+0x10d/0x4d0 [ 30.762087] rcu_core+0x8c8/0x2860 [ 30.762535] __do_softirq+0x1b7/0x7d4 [ 30.763016] [ 30.763237] Last potentially related work creation: [ 30.763819] kasan_save_stack+0x22/0x50 [ 30.764323] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765561] remove_vma+0x139/0x170 [ 30.766012] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766565] do_vmi_munmap+0x1f1/0x2b0 [ 30.767051] __vm_munmap+0x138/0x3a0 [ 30.767514] __x64_sys_munmap+0x59/0x80 [ 30.768012] do_syscall_64+0x3f/0x90 [ 30.768488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769134] [ 30.769356] The buggy address belongs to the object at ffff888015e5c910 [ 30.769356] which belongs to the cache vm_area_struct of size 168 [ 30.770830] The buggy address is located 88 bytes inside of [ 30.770830] freed 168-byte region [ffff888015e5c910, ffff888015e5c9b8) [ 30.772227] [ 30.772444] The buggy address belongs to the physical page: [ 30.773124] page:000000003d89fc55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e5c [ 30.774211] memcg:ffff88800de8f501 [ 30.774634] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.775274] page_type: 0xffffffff() [ 30.775729] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.776641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de8f501 [ 30.777541] page dumped because: kasan: bad access detected [ 30.778245] [ 30.778461] Memory state around the buggy address: [ 30.779042] ffff888015e5c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.779894] ffff888015e5c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.780746] >ffff888015e5c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.781636] ^ [ 30.782460] ffff888015e5c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.783309] ffff888015e5ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.784156] ================================================================== [ 30.785460] Disabling lock debugging due to kernel taint [ 32.779100] BUG: Bad rss-counter state mm:000000006faea83b type:MM_FILEPAGES val:33 [ 32.780263] BUG: Bad rss-counter state mm:000000006faea83b type:MM_ANONPAGES val:22 [ 33.177014] BUG: Bad rss-counter state mm:00000000adaf8fce type:MM_FILEPAGES val:33 [ 33.178202] BUG: Bad rss-counter state mm:00000000adaf8fce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43741' (ECDSA) to the list of known hosts. 2023/06/21 00:36:12 fuzzer started 2023/06/21 00:36:13 dialing manager at localhost:36067 2023/06/21 00:36:13 checking machine... 2023/06/21 00:36:13 checking revisions... [ 33.921595] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:36:13 testing simple program... [ 33.974458] cgroup: Unknown subsys name 'net' [ 34.015172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:36:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002caffbd RCX=0000000000000000 RDX=000000000000000c RSI=ffffffff836339fb RDI=ffffffff85d3d350 RBP=00007ffebe73bc24 RSP=ffff88801657fda8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=000000000000000c R13=000000000000000c R14=ffff88801657fe28 R15=00007ffebe73bc28 RIP=ffffffff84501f48 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 00007fa621d3e900 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=00007fa6222f5618 CR3=000000000c9de000 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=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=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fba378174b0 CR3=000000000c628000 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=2caf98abe1ca67910e4e7431735689fe XMM02=ec2efd57dc4c00df000000000011d5f8 XMM03=8f9c6b82200e7199000000000011d6c8 XMM04=0e58adfabb72134900000000000ae988 XMM05=19e9129bd510f2350000000000131b78 XMM06=790fd4163c76951700000000001309e0 XMM07=e042d86d42eb936e0000000000121f78 XMM08=8f9c6b82200e7199000000000011d6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000