syzkaller login: [ 30.604012] BUG: Bad rss-counter state mm:000000005259ada4 type:MM_FILEPAGES val:33 [ 30.605432] BUG: Bad rss-counter state mm:000000005259ada4 type:MM_ANONPAGES val:22 [ 30.753596] ================================================================== [ 30.754554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.755498] Read of size 8 at addr ffff888016c8dd08 by task sshd/221 [ 30.756288] [ 30.756570] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.757473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758479] Call Trace: [ 30.758830] [ 30.759123] dump_stack_lvl+0x91/0xf0 [ 30.759625] print_report+0xcc/0x620 [ 30.760109] ? __virt_addr_valid+0x102/0x340 [ 30.760671] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761918] kasan_report+0xbe/0xf0 [ 30.762403] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763031] vma_interval_tree_remove+0xc75/0xec0 [ 30.763637] vma_prepare+0xc54/0x11a0 [ 30.764126] __split_vma+0x5af/0x950 [ 30.764607] ? __pfx___split_vma+0x10/0x10 [ 30.765136] ? find_held_lock+0x2c/0x110 [ 30.765667] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766234] ? lock_is_held_type+0x9f/0x120 [ 30.766782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.767392] ? mtree_range_walk+0x632/0x900 [ 30.767951] ? mas_walk+0x5c7/0x7c0 [ 30.768441] do_vmi_munmap+0x1f1/0x2b0 [ 30.768931] mmap_region+0x1f9/0x2660 [ 30.769427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.769953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.770671] ? __pfx_lock_acquire+0x10/0x10 [ 30.771208] ? __pfx_mmap_region+0x10/0x10 [ 30.771742] ? security_mmap_addr+0x7d/0xa0 [ 30.772284] ? get_unmapped_area+0x1f5/0x3f0 [ 30.772837] do_mmap+0x854/0xf00 [ 30.773287] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.773800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.774372] ksys_mmap_pgoff+0x3af/0x500 [ 30.774877] do_syscall_64+0x3f/0x90 [ 30.775359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776010] RIP: 0033:0x7f7ed0f67d82 [ 30.776472] 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 [ 30.778680] RSP: 002b:00007ffed601bbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ed0f67d82 [ 30.780472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ed03a1000 [ 30.781337] RBP: 00007f7ed03a1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.782207] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4f24d0f70 [ 30.783065] R13: 00007ffed601bbf0 R14: 00007ffed601bc20 R15: 00007ffed601bf80 [ 30.783932] [ 30.784222] [ 30.784439] Allocated by task 214: [ 30.784877] kasan_save_stack+0x22/0x50 [ 30.785387] kasan_set_track+0x25/0x30 [ 30.785905] __kasan_slab_alloc+0x59/0x70 [ 30.786442] kmem_cache_alloc+0x16b/0x370 [ 30.786968] vm_area_dup+0x20/0x160 [ 30.787419] __split_vma+0x170/0x950 [ 30.787884] split_vma+0xc6/0x110 [ 30.788337] mprotect_fixup+0x8d2/0xb30 [ 30.788858] do_mprotect_pkey+0x87e/0xd40 [ 30.789373] __x64_sys_mprotect+0x78/0xc0 [ 30.789913] do_syscall_64+0x3f/0x90 [ 30.790392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791037] [ 30.791255] Freed by task 214: [ 30.791657] kasan_save_stack+0x22/0x50 [ 30.792160] kasan_set_track+0x25/0x30 [ 30.792657] kasan_save_free_info+0x2b/0x50 [ 30.793196] __kasan_slab_free+0x10a/0x190 [ 30.793752] kmem_cache_free+0x10d/0x4d0 [ 30.794292] rcu_core+0x8c8/0x2860 [ 30.794754] __do_softirq+0x1b7/0x7d4 [ 30.795236] [ 30.795453] Last potentially related work creation: [ 30.796041] kasan_save_stack+0x22/0x50 [ 30.796543] __kasan_record_aux_stack+0x8e/0xa0 [ 30.797120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.797793] remove_vma+0x139/0x170 [ 30.798257] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.798822] do_vmi_munmap+0x1f1/0x2b0 [ 30.799312] __vm_munmap+0x138/0x3a0 [ 30.799787] __x64_sys_munmap+0x59/0x80 [ 30.800287] do_syscall_64+0x3f/0x90 [ 30.800763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801405] [ 30.801620] The buggy address belongs to the object at ffff888016c8dcb0 [ 30.801620] which belongs to the cache vm_area_struct of size 168 [ 30.803099] The buggy address is located 88 bytes inside of [ 30.803099] freed 168-byte region [ffff888016c8dcb0, ffff888016c8dd58) [ 30.804510] [ 30.804730] The buggy address belongs to the physical page: [ 30.805395] page:0000000056c3b677 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c8d [ 30.806499] memcg:ffff8880146f0501 [ 30.806922] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.807566] page_type: 0xffffffff() [ 30.808019] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.808943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146f0501 [ 30.809857] page dumped because: kasan: bad access detected [ 30.810534] [ 30.810757] Memory state around the buggy address: [ 30.811340] ffff888016c8dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.812208] ffff888016c8dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.813068] >ffff888016c8dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.813929] ^ [ 30.814373] ffff888016c8dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.815239] ffff888016c8de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.816094] ================================================================== [ 30.817062] Disabling lock debugging due to kernel taint [ 32.851175] BUG: Bad rss-counter state mm:000000001f3d59b4 type:MM_FILEPAGES val:33 [ 32.852306] BUG: Bad rss-counter state mm:000000001f3d59b4 type:MM_ANONPAGES val:22 [ 33.300491] BUG: Bad rss-counter state mm:00000000155efe79 type:MM_FILEPAGES val:33 [ 33.301897] BUG: Bad rss-counter state mm:00000000155efe79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16814' (ECDSA) to the list of known hosts. 2023/06/21 01:57:50 fuzzer started 2023/06/21 01:57:51 dialing manager at localhost:36067 2023/06/21 01:57:51 checking machine... 2023/06/21 01:57:51 checking revisions... [ 33.945652] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:57:51 testing simple program... [ 33.997312] cgroup: Unknown subsys name 'net' [ 34.039208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:57:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801660f5a8 RCX=0000000000000001 RDX=1ffff11002cc1eb6 RSI=ffff88801660ff38 RDI=ffff88801660f5b0 RBP=ffff88801660ff38 RSP=ffff88801660f500 R8 =ffffffff863b444c R9 =ffff88801660f5e8 R10=0000000000038001 R11=000000000008abe0 R12=0000000000000008 R13=ffff88801660f5f0 R14=ffff88801660ff40 R15=ffff88801660f5a8 RIP=ffffffff81130445 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 00007f7dae3ae900 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=00007f7dae965618 CR3=000000000d586000 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=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=00007f41af2387a0 CR3=000000000c6ee000 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=89c55c66642f2092254791a03e393264 XMM02=2c67c8bc2e329bc3000000000011b3e8 XMM03=fb795ef6d657705600000000001220f0 XMM04=3c6839334fb4442300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f48 XMM06=1dca1036562d64fe0000000000130db0 XMM07=e042d86d42eb936e0000000000122370 XMM08=b728c1a14225dd6d000000000011b448 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000