syzkaller login: [ 36.738271] BUG: Bad rss-counter state mm:00000000ac3db760 type:MM_FILEPAGES val:33 [ 36.739233] BUG: Bad rss-counter state mm:00000000ac3db760 type:MM_ANONPAGES val:22 [ 36.905206] ================================================================== [ 36.906068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.906944] Read of size 8 at addr ffff88801583ad08 by task sshd/220 [ 36.907667] [ 36.907886] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.908810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.909739] Call Trace: [ 36.910046] [ 36.910318] dump_stack_lvl+0x91/0xf0 [ 36.910779] print_report+0xcc/0x620 [ 36.911251] ? __virt_addr_valid+0x102/0x340 [ 36.911775] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.912392] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.912989] kasan_report+0xbe/0xf0 [ 36.913459] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.914064] vma_interval_tree_remove+0xc75/0xec0 [ 36.914640] vma_prepare+0xc54/0x11a0 [ 36.915106] __split_vma+0x5af/0x950 [ 36.915560] ? __pfx___split_vma+0x10/0x10 [ 36.916079] ? find_held_lock+0x2c/0x110 [ 36.916586] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.917138] ? lock_is_held_type+0x9f/0x120 [ 36.917661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.918248] ? mtree_range_walk+0x632/0x900 [ 36.918780] ? mas_walk+0x5c7/0x7c0 [ 36.919248] do_vmi_munmap+0x1f1/0x2b0 [ 36.919724] mmap_region+0x1f9/0x2660 [ 36.920197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.920696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.921388] ? __pfx_lock_acquire+0x10/0x10 [ 36.921906] ? __pfx_mmap_region+0x10/0x10 [ 36.922427] ? security_mmap_addr+0x7d/0xa0 [ 36.922941] ? get_unmapped_area+0x1f5/0x3f0 [ 36.923470] do_mmap+0x854/0xf00 [ 36.923922] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.924406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.924950] ksys_mmap_pgoff+0x3af/0x500 [ 36.925445] do_syscall_64+0x3f/0x90 [ 36.925912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.926539] RIP: 0033:0x7ff808c76d82 [ 36.926985] 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 [ 36.929045] RSP: 002b:00007ffd02c77ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.929927] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff808c76d82 [ 36.930746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8080b0000 [ 36.931570] RBP: 00007ff8080b0000 R08: 0000000000000009 R09: 0000000000001000 [ 36.932410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556228149d90 [ 36.933220] R13: 00007ffd02c77d00 R14: 00007ffd02c77d30 R15: 00007ffd02c78090 [ 36.934061] [ 36.934347] [ 36.934561] Allocated by task 213: [ 36.934983] kasan_save_stack+0x22/0x50 [ 36.935473] kasan_set_track+0x25/0x30 [ 36.935957] __kasan_slab_alloc+0x59/0x70 [ 36.936479] kmem_cache_alloc+0x16b/0x370 [ 36.936985] vm_area_dup+0x20/0x160 [ 36.937433] __split_vma+0x170/0x950 [ 36.937887] split_vma+0xc6/0x110 [ 36.938318] mprotect_fixup+0x8d2/0xb30 [ 36.938817] do_mprotect_pkey+0x87e/0xd40 [ 36.939328] __x64_sys_mprotect+0x78/0xc0 [ 36.939843] do_syscall_64+0x3f/0x90 [ 36.940315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.940934] [ 36.941149] Freed by task 213: [ 36.941535] kasan_save_stack+0x22/0x50 [ 36.942031] kasan_set_track+0x25/0x30 [ 36.942523] kasan_save_free_info+0x2b/0x50 [ 36.943046] __kasan_slab_free+0x10a/0x190 [ 36.943579] kmem_cache_free+0x10d/0x4d0 [ 36.944086] rcu_core+0x8c8/0x2860 [ 36.944521] __do_softirq+0x1b7/0x7d4 [ 36.944990] [ 36.945197] Last potentially related work creation: [ 36.945775] kasan_save_stack+0x22/0x50 [ 36.946265] __kasan_record_aux_stack+0x8e/0xa0 [ 36.946828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.947463] remove_vma+0x139/0x170 [ 36.947921] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.948475] do_vmi_munmap+0x1f1/0x2b0 [ 36.948952] __vm_munmap+0x138/0x3a0 [ 36.949416] __x64_sys_munmap+0x59/0x80 [ 36.949900] do_syscall_64+0x3f/0x90 [ 36.950357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.950985] [ 36.951192] The buggy address belongs to the object at ffff88801583acb0 [ 36.951192] which belongs to the cache vm_area_struct of size 168 [ 36.952660] The buggy address is located 88 bytes inside of [ 36.952660] freed 168-byte region [ffff88801583acb0, ffff88801583ad58) [ 36.954036] [ 36.954248] The buggy address belongs to the physical page: [ 36.954898] page:000000001a918206 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1583a [ 36.955960] memcg:ffff888015a20d01 [ 36.956374] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.957008] page_type: 0xffffffff() [ 36.957450] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.958353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a20d01 [ 36.959246] page dumped because: kasan: bad access detected [ 36.959901] [ 36.960110] Memory state around the buggy address: [ 36.960683] ffff88801583ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.961522] ffff88801583ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.962365] >ffff88801583ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.963198] ^ [ 36.963630] ffff88801583ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.964480] ffff88801583ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.965311] ================================================================== [ 36.966272] Disabling lock debugging due to kernel taint [ 38.858947] BUG: Bad rss-counter state mm:0000000013d58f37 type:MM_FILEPAGES val:33 [ 38.860375] BUG: Bad rss-counter state mm:0000000013d58f37 type:MM_ANONPAGES val:22 [ 39.340382] BUG: Bad rss-counter state mm:000000009dce57ae type:MM_FILEPAGES val:33 [ 39.341355] BUG: Bad rss-counter state mm:000000009dce57ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42540' (ECDSA) to the list of known hosts. 2023/06/20 00:32:26 fuzzer started 2023/06/20 00:32:27 dialing manager at localhost:44161 2023/06/20 00:32:27 checking machine... 2023/06/20 00:32:27 checking revisions... [ 39.970238] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:32:27 testing simple program... [ 40.008117] cgroup: Unknown subsys name 'net' [ 40.044906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:32:20 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=00007ffd5af852f8 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=00007f92ac0d2510000055d277400790 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=0000000000000000 RBX=00000000000005c8 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff888016df4000 RBP=0000000000000001 RSP=ffff88800ec37cd8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=ffff88800dc6e000 R14=0000000000000cc0 R15=ffff888016df4000 RIP=ffffffff8182da61 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 00007f8168ac7900 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=00007f816907e618 CR3=000000000f04c000 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