syzkaller login: [ 65.594031] BUG: Bad rss-counter state mm:00000000972242de type:MM_FILEPAGES val:33 [ 65.595195] BUG: Bad rss-counter state mm:00000000972242de type:MM_ANONPAGES val:22 [ 65.634095] ================================================================== [ 65.635271] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.636512] Read of size 8 at addr ffff88800d5b4df0 by task sshd/220 [ 65.637440] [ 65.637698] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 65.638738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.639711] Call Trace: [ 65.640036] [ 65.640323] dump_stack_lvl+0x91/0xf0 [ 65.640813] print_report+0xcc/0x620 [ 65.641325] ? __virt_addr_valid+0x102/0x340 [ 65.641881] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.642500] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.643115] kasan_report+0xbe/0xf0 [ 65.643594] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.644227] vma_interval_tree_remove+0xc75/0xec0 [ 65.644823] vma_prepare+0xc54/0x11a0 [ 65.645323] __split_vma+0x5af/0x950 [ 65.645798] ? __pfx___split_vma+0x10/0x10 [ 65.646336] ? find_held_lock+0x2c/0x110 [ 65.646857] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.647421] ? lock_is_held_type+0x9f/0x120 [ 65.647962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.648563] ? mtree_range_walk+0x632/0x900 [ 65.649138] ? mas_walk+0x5c7/0x7c0 [ 65.649619] do_vmi_munmap+0x1f1/0x2b0 [ 65.650112] mmap_region+0x1f9/0x2660 [ 65.650593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.651105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.651819] ? __pfx_lock_acquire+0x10/0x10 [ 65.652356] ? __pfx_mmap_region+0x10/0x10 [ 65.652901] ? security_mmap_addr+0x7d/0xa0 [ 65.653434] ? get_unmapped_area+0x1f5/0x3f0 [ 65.653980] do_mmap+0x854/0xf00 [ 65.654417] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.654919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.655481] ksys_mmap_pgoff+0x3af/0x500 [ 65.655996] do_syscall_64+0x3f/0x90 [ 65.656468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.657143] RIP: 0033:0x7f660a298d82 [ 65.657598] 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 [ 65.659731] RSP: 002b:00007fff7f8e8748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.660639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f660a298d82 [ 65.661512] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66096d2000 [ 65.662373] RBP: 00007f66096d2000 R08: 0000000000000009 R09: 0000000000001000 [ 65.663224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff5e72bec0 [ 65.664072] R13: 00007fff7f8e8760 R14: 00007fff7f8e8790 R15: 00007fff7f8e8af0 [ 65.664989] [ 65.665285] [ 65.665497] Allocated by task 213: [ 65.665924] kasan_save_stack+0x22/0x50 [ 65.666434] kasan_set_track+0x25/0x30 [ 65.666928] __kasan_slab_alloc+0x59/0x70 [ 65.667451] kmem_cache_alloc+0x16b/0x370 [ 65.667971] vm_area_dup+0x20/0x160 [ 65.668427] __split_vma+0x170/0x950 [ 65.668901] split_vma+0xc6/0x110 [ 65.669346] mprotect_fixup+0x8d2/0xb30 [ 65.669860] do_mprotect_pkey+0x87e/0xd40 [ 65.670383] __x64_sys_mprotect+0x78/0xc0 [ 65.670911] do_syscall_64+0x3f/0x90 [ 65.671385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.672020] [ 65.672236] Freed by task 213: [ 65.672630] kasan_save_stack+0x22/0x50 [ 65.673153] kasan_set_track+0x25/0x30 [ 65.673655] kasan_save_free_info+0x2b/0x50 [ 65.674204] __kasan_slab_free+0x10a/0x190 [ 65.674733] kmem_cache_free+0x10d/0x4d0 [ 65.675247] rcu_core+0x8c8/0x2860 [ 65.675695] __do_softirq+0x1b7/0x7d4 [ 65.676173] [ 65.676393] Last potentially related work creation: [ 65.676994] kasan_save_stack+0x22/0x50 [ 65.677491] __kasan_record_aux_stack+0x8e/0xa0 [ 65.678063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.678701] remove_vma+0x139/0x170 [ 65.679150] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.679704] do_vmi_munmap+0x1f1/0x2b0 [ 65.680191] __vm_munmap+0x138/0x3a0 [ 65.680654] __x64_sys_munmap+0x59/0x80 [ 65.681160] do_syscall_64+0x3f/0x90 [ 65.681633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.682271] [ 65.682488] The buggy address belongs to the object at ffff88800d5b4d98 [ 65.682488] which belongs to the cache vm_area_struct of size 168 [ 65.683941] The buggy address is located 88 bytes inside of [ 65.683941] freed 168-byte region [ffff88800d5b4d98, ffff88800d5b4e40) [ 65.685357] [ 65.685571] The buggy address belongs to the physical page: [ 65.686219] page:00000000d62a593a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b4 [ 65.687294] memcg:ffff88800e66f001 [ 65.687718] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.688361] page_type: 0xffffffff() [ 65.688810] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 65.689764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e66f001 [ 65.690659] page dumped because: kasan: bad access detected [ 65.691315] [ 65.691530] Memory state around the buggy address: [ 65.692116] ffff88800d5b4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 65.692989] ffff88800d5b4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 65.693844] >ffff88800d5b4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 65.694689] ^ [ 65.695487] ffff88800d5b4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 65.696332] ffff88800d5b4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.697190] ================================================================== [ 65.698455] Disabling lock debugging due to kernel taint [ 67.598934] BUG: Bad rss-counter state mm:0000000015a93a3e type:MM_FILEPAGES val:33 [ 67.599621] BUG: Bad rss-counter state mm:0000000015a93a3e type:MM_ANONPAGES val:22 [ 67.996324] BUG: Bad rss-counter state mm:00000000a16e6374 type:MM_FILEPAGES val:33 [ 67.996997] BUG: Bad rss-counter state mm:00000000a16e6374 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6968' (ECDSA) to the list of known hosts. 2023/06/20 04:30:47 fuzzer started 2023/06/20 04:30:48 dialing manager at localhost:44161 2023/06/20 04:30:48 checking machine... 2023/06/20 04:30:48 checking revisions... [ 68.607738] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:30:48 testing simple program... [ 68.657096] cgroup: Unknown subsys name 'net' [ 68.708319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:30:41 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=ffff888008c58000 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=00007ffe2d803958 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=00007fdcda042510000055f0a1337790 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002e66f93 RSP=ffff888017337c88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff8145222f R14=0000000000000010 R15=0000000000000001 RIP=ffffffff812d8ad3 RFL=00000247 [---Z-PC] 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 00007f52d2faa900 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=00007f52d35620b0 CR3=000000001a1e0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000