syzkaller login: [ 31.754870] BUG: Bad rss-counter state mm:00000000fac4f46a type:MM_FILEPAGES val:33 [ 31.756729] BUG: Bad rss-counter state mm:00000000fac4f46a type:MM_ANONPAGES val:22 [ 31.921280] ================================================================== [ 31.922362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.923479] Read of size 8 at addr ffff8880166b0d08 by task sshd/220 [ 31.924629] [ 31.924898] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.925847] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.926899] Call Trace: [ 31.927242] [ 31.927548] dump_stack_lvl+0x91/0xf0 [ 31.928089] print_report+0xcc/0x620 [ 31.928621] ? __virt_addr_valid+0x102/0x340 [ 31.929218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.929902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.930571] kasan_report+0xbe/0xf0 [ 31.931089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.931748] vma_interval_tree_remove+0xc75/0xec0 [ 31.932405] vma_prepare+0xc54/0x11a0 [ 31.932918] __split_vma+0x5af/0x950 [ 31.933441] ? __pfx___split_vma+0x10/0x10 [ 31.934025] ? find_held_lock+0x2c/0x110 [ 31.934577] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.935179] ? lock_is_held_type+0x9f/0x120 [ 31.935747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.936402] ? mtree_range_walk+0x632/0x900 [ 31.936990] ? mas_walk+0x5c7/0x7c0 [ 31.937496] do_vmi_munmap+0x1f1/0x2b0 [ 31.938017] mmap_region+0x1f9/0x2660 [ 31.938531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.939077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.939825] ? __pfx_lock_acquire+0x10/0x10 [ 31.940391] ? __pfx_mmap_region+0x10/0x10 [ 31.940955] ? security_mmap_addr+0x7d/0xa0 [ 31.941515] ? get_unmapped_area+0x1f5/0x3f0 [ 31.942099] do_mmap+0x854/0xf00 [ 31.942561] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.943087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.943678] ksys_mmap_pgoff+0x3af/0x500 [ 31.944215] do_syscall_64+0x3f/0x90 [ 31.944733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.945413] RIP: 0033:0x7f26c8c22d82 [ 31.945897] 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 [ 31.948144] RSP: 002b:00007fff095dd148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.949116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26c8c22d82 [ 31.950013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26c805c000 [ 31.950913] RBP: 00007f26c805c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.951808] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599cbe7eec0 [ 31.952709] R13: 00007fff095dd160 R14: 00007fff095dd190 R15: 00007fff095dd4f0 [ 31.953618] [ 31.953932] [ 31.954163] Allocated by task 213: [ 31.954615] kasan_save_stack+0x22/0x50 [ 31.955153] kasan_set_track+0x25/0x30 [ 31.955679] __kasan_slab_alloc+0x59/0x70 [ 31.956235] kmem_cache_alloc+0x16b/0x370 [ 31.956801] vm_area_dup+0x20/0x160 [ 31.957285] __split_vma+0x170/0x950 [ 31.957776] split_vma+0xc6/0x110 [ 31.958241] mprotect_fixup+0x8d2/0xb30 [ 31.958770] do_mprotect_pkey+0x87e/0xd40 [ 31.959320] __x64_sys_mprotect+0x78/0xc0 [ 31.959877] do_syscall_64+0x3f/0x90 [ 31.960383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.961063] [ 31.961292] Freed by task 213: [ 31.961704] kasan_save_stack+0x22/0x50 [ 31.962238] kasan_set_track+0x25/0x30 [ 31.962765] kasan_save_free_info+0x2b/0x50 [ 31.963330] __kasan_slab_free+0x10a/0x190 [ 31.963896] kmem_cache_free+0x10d/0x4d0 [ 31.964442] rcu_core+0x8c8/0x2860 [ 31.964913] __do_softirq+0x1b7/0x7d4 [ 31.965417] [ 31.965645] Last potentially related work creation: [ 31.966266] kasan_save_stack+0x22/0x50 [ 31.966804] __kasan_record_aux_stack+0x8e/0xa0 [ 31.967411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.968087] remove_vma+0x139/0x170 [ 31.968584] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.969176] do_vmi_munmap+0x1f1/0x2b0 [ 31.969688] __vm_munmap+0x138/0x3a0 [ 31.970187] __x64_sys_munmap+0x59/0x80 [ 31.970715] do_syscall_64+0x3f/0x90 [ 31.971220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.971897] [ 31.972129] The buggy address belongs to the object at ffff8880166b0cb0 [ 31.972129] which belongs to the cache vm_area_struct of size 168 [ 31.973687] The buggy address is located 88 bytes inside of [ 31.973687] freed 168-byte region [ffff8880166b0cb0, ffff8880166b0d58) [ 31.975179] [ 31.975411] The buggy address belongs to the physical page: [ 31.976115] page:00000000b4faf405 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166b0 [ 31.977296] memcg:ffff888015b5b501 [ 31.977751] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.978496] page_type: 0xffffffff() [ 31.978978] raw: 0100000000000200 ffff88800879fc80 ffffea000038f200 dead000000000003 [ 31.979959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b5b501 [ 31.980935] page dumped because: kasan: bad access detected [ 31.981643] [ 31.981874] Memory state around the buggy address: [ 31.982494] ffff8880166b0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.983410] ffff8880166b0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.984323] >ffff8880166b0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.985249] ^ [ 31.985714] ffff8880166b0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.986623] ffff8880166b0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.987527] ================================================================== [ 31.989040] Disabling lock debugging due to kernel taint [ 33.851049] BUG: Bad rss-counter state mm:0000000030233c33 type:MM_FILEPAGES val:33 [ 33.851977] BUG: Bad rss-counter state mm:0000000030233c33 type:MM_ANONPAGES val:22 [ 34.316090] BUG: Bad rss-counter state mm:0000000007be160d type:MM_FILEPAGES val:33 [ 34.317037] BUG: Bad rss-counter state mm:0000000007be160d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6507' (ECDSA) to the list of known hosts. 2023/06/19 13:10:20 fuzzer started 2023/06/19 13:10:20 dialing manager at localhost:44161 2023/06/19 13:10:20 checking machine... 2023/06/19 13:10:20 checking revisions... [ 35.050389] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:10:20 testing simple program... [ 35.104307] cgroup: Unknown subsys name 'net' [ 35.154917] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:18 Registers: info registers vcpu 0 RAX=ffffffff84531da7 RBX=0000000000000006 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000001d RDI=ffff88806ce09c00 RBP=dffffc0000000000 RSP=ffff88806ce09b40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000001d R13=0000000000000000 R14=ffff88806ce09bd0 R15=ffff88801a3f7540 RIP=ffffffff813ad601 RFL=00000283 [--S---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 00007fc639d0c900 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=00007fc63a2c3618 CR3=000000000edae000 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=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84530713 RBP=ffffffff85ba4c00 RSP=ffff88800fdefc78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000004 R13=0000000000000001 R14=ffff88800f9176b8 R15=ffff88800f917000 RIP=ffffffff8450b935 RFL=00000046 [---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 00007fc639d0c900 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=00007ff817ffbb60 CR3=000000000edae000 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=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