syzkaller login: [ 42.123254] BUG: Bad rss-counter state mm:0000000057034c4a type:MM_FILEPAGES val:33 [ 42.124495] BUG: Bad rss-counter state mm:0000000057034c4a type:MM_ANONPAGES val:22 [ 42.221706] ================================================================== [ 42.222620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.223556] Read of size 8 at addr ffff88800dfed6b0 by task sshd/221 [ 42.224414] [ 42.224650] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.225524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.226498] Call Trace: [ 42.226824] [ 42.227110] dump_stack_lvl+0x91/0xf0 [ 42.227613] print_report+0xcc/0x620 [ 42.228103] ? __virt_addr_valid+0x102/0x340 [ 42.228655] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.229268] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.229905] kasan_report+0xbe/0xf0 [ 42.230380] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.230999] vma_interval_tree_remove+0xc75/0xec0 [ 42.231595] vma_prepare+0xc54/0x11a0 [ 42.232071] __split_vma+0x5af/0x950 [ 42.232540] ? __pfx___split_vma+0x10/0x10 [ 42.233071] ? find_held_lock+0x2c/0x110 [ 42.233608] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.234169] ? lock_is_held_type+0x9f/0x120 [ 42.234707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.235311] ? mtree_range_walk+0x632/0x900 [ 42.235869] ? mas_walk+0x5c7/0x7c0 [ 42.236341] do_vmi_munmap+0x1f1/0x2b0 [ 42.236843] mmap_region+0x1f9/0x2660 [ 42.237322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.237844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.238550] ? __pfx_lock_acquire+0x10/0x10 [ 42.239080] ? __pfx_mmap_region+0x10/0x10 [ 42.239610] ? security_mmap_addr+0x7d/0xa0 [ 42.240138] ? get_unmapped_area+0x1f5/0x3f0 [ 42.240682] do_mmap+0x854/0xf00 [ 42.241123] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.241641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.242211] ksys_mmap_pgoff+0x3af/0x500 [ 42.242714] do_syscall_64+0x3f/0x90 [ 42.243189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.243838] RIP: 0033:0x7f3d01f4ad82 [ 42.244291] 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 [ 42.246403] RSP: 002b:00007fffe5fc4bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.247296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d01f4ad82 [ 42.248131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d01384000 [ 42.248968] RBP: 00007f3d01384000 R08: 0000000000000009 R09: 0000000000001000 [ 42.249831] R10: 0000000000000812 R11: 0000000000000206 R12: 000055627238fec0 [ 42.250672] R13: 00007fffe5fc4bd0 R14: 00007fffe5fc4c00 R15: 00007fffe5fc4f60 [ 42.251525] [ 42.251819] [ 42.252039] Allocated by task 214: [ 42.252460] kasan_save_stack+0x22/0x50 [ 42.252963] kasan_set_track+0x25/0x30 [ 42.253472] __kasan_slab_alloc+0x59/0x70 [ 42.253995] kmem_cache_alloc+0x16b/0x370 [ 42.254516] vm_area_dup+0x20/0x160 [ 42.254977] __split_vma+0x170/0x950 [ 42.255437] split_vma+0xc6/0x110 [ 42.255878] mprotect_fixup+0x8d2/0xb30 [ 42.256374] do_mprotect_pkey+0x87e/0xd40 [ 42.256891] __x64_sys_mprotect+0x78/0xc0 [ 42.257409] do_syscall_64+0x3f/0x90 [ 42.257888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.258527] [ 42.258741] Freed by task 214: [ 42.259132] kasan_save_stack+0x22/0x50 [ 42.259627] kasan_set_track+0x25/0x30 [ 42.260130] kasan_save_free_info+0x2b/0x50 [ 42.260657] __kasan_slab_free+0x10a/0x190 [ 42.261191] kmem_cache_free+0x10d/0x4d0 [ 42.261713] rcu_core+0x8c8/0x2860 [ 42.262162] __do_softirq+0x1b7/0x7d4 [ 42.262634] [ 42.262854] Last potentially related work creation: [ 42.263452] kasan_save_stack+0x22/0x50 [ 42.263956] __kasan_record_aux_stack+0x8e/0xa0 [ 42.264533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.265183] remove_vma+0x139/0x170 [ 42.265645] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.266200] do_vmi_munmap+0x1f1/0x2b0 [ 42.266682] __vm_munmap+0x138/0x3a0 [ 42.267145] __x64_sys_munmap+0x59/0x80 [ 42.267637] do_syscall_64+0x3f/0x90 [ 42.268106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.268749] [ 42.268969] The buggy address belongs to the object at ffff88800dfed658 [ 42.268969] which belongs to the cache vm_area_struct of size 168 [ 42.270443] The buggy address is located 88 bytes inside of [ 42.270443] freed 168-byte region [ffff88800dfed658, ffff88800dfed700) [ 42.271831] [ 42.272046] The buggy address belongs to the physical page: [ 42.272704] page:00000000200e5c1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfed [ 42.273805] memcg:ffff888013123d01 [ 42.274237] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.274881] page_type: 0xffffffff() [ 42.275337] raw: 0100000000000200 ffff88800879fc80 ffffea0000386a80 dead000000000008 [ 42.276257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013123d01 [ 42.277165] page dumped because: kasan: bad access detected [ 42.277840] [ 42.278055] Memory state around the buggy address: [ 42.278644] ffff88800dfed580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.279504] ffff88800dfed600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.280347] >ffff88800dfed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.281197] ^ [ 42.281785] ffff88800dfed700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.282625] ffff88800dfed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.283474] ================================================================== [ 42.284467] Disabling lock debugging due to kernel taint [ 44.558962] BUG: Bad rss-counter state mm:000000005ea4f43d type:MM_FILEPAGES val:33 [ 44.560292] BUG: Bad rss-counter state mm:000000005ea4f43d type:MM_ANONPAGES val:22 [ 45.021205] BUG: Bad rss-counter state mm:0000000088d8d32d type:MM_FILEPAGES val:33 [ 45.022230] BUG: Bad rss-counter state mm:0000000088d8d32d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40589' (ECDSA) to the list of known hosts. 2023/06/20 07:35:38 fuzzer started 2023/06/20 07:35:39 dialing manager at localhost:44161 2023/06/20 07:35:39 checking machine... 2023/06/20 07:35:39 checking revisions... [ 45.744210] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:35:39 testing simple program... [ 45.790112] cgroup: Unknown subsys name 'net' [ 45.870410] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed10032fff34 RSP=ffff8880197ff990 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806ce39518 R13=ffffffff8451751c R14=ffff88800efd1fe8 R15=ffff88800efd1b40 RIP=ffffffff812d89e5 RFL=00000082 [--S----] 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 00007fc08741c700 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=00007fa850aec010 CR3=00000000164e6000 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=2038333a35333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35333a3730203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffc00ae1f28 CR3=0000000005482000 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=00007f65aea4a5100000556764c69790 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