syzkaller login: [ 30.234529] BUG: Bad rss-counter state mm:000000007656627f type:MM_FILEPAGES val:33 [ 30.235710] BUG: Bad rss-counter state mm:000000007656627f type:MM_ANONPAGES val:22 [ 30.274838] ================================================================== [ 30.275737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.276999] Read of size 8 at addr ffff8880165e06b0 by task sshd/220 [ 30.277777] [ 30.278007] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.278903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.279893] Call Trace: [ 30.280233] [ 30.280525] dump_stack_lvl+0x91/0xf0 [ 30.281022] print_report+0xcc/0x620 [ 30.281524] ? __virt_addr_valid+0x102/0x340 [ 30.282067] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.283296] kasan_report+0xbe/0xf0 [ 30.283775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.284424] vma_interval_tree_remove+0xc75/0xec0 [ 30.285022] vma_prepare+0xc54/0x11a0 [ 30.285495] __split_vma+0x5af/0x950 [ 30.285965] ? __pfx___split_vma+0x10/0x10 [ 30.286498] ? find_held_lock+0x2c/0x110 [ 30.287016] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.287584] ? lock_is_held_type+0x9f/0x120 [ 30.288120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.288769] ? mtree_range_walk+0x632/0x900 [ 30.289326] ? mas_walk+0x5c7/0x7c0 [ 30.289812] do_vmi_munmap+0x1f1/0x2b0 [ 30.290307] mmap_region+0x1f9/0x2660 [ 30.290788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.291299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.292004] ? __pfx_lock_acquire+0x10/0x10 [ 30.292545] ? __pfx_mmap_region+0x10/0x10 [ 30.293077] ? security_mmap_addr+0x7d/0xa0 [ 30.293630] ? get_unmapped_area+0x1f5/0x3f0 [ 30.294188] do_mmap+0x854/0xf00 [ 30.294627] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.295124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.295732] ksys_mmap_pgoff+0x3af/0x500 [ 30.296250] do_syscall_64+0x3f/0x90 [ 30.296750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297409] RIP: 0033:0x7f15e251bd82 [ 30.297879] 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 [ 30.300060] RSP: 002b:00007ffef1ec26a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.301006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15e251bd82 [ 30.301879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15e1955000 [ 30.302738] RBP: 00007f15e1955000 R08: 0000000000000009 R09: 0000000000001000 [ 30.303609] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d12e46dd90 [ 30.304496] R13: 00007ffef1ec26c0 R14: 00007ffef1ec26f0 R15: 00007ffef1ec2a50 [ 30.305370] [ 30.305673] [ 30.305894] Allocated by task 213: [ 30.306332] kasan_save_stack+0x22/0x50 [ 30.306847] kasan_set_track+0x25/0x30 [ 30.307348] __kasan_slab_alloc+0x59/0x70 [ 30.307882] kmem_cache_alloc+0x16b/0x370 [ 30.308419] vm_area_dup+0x20/0x160 [ 30.308885] __split_vma+0x170/0x950 [ 30.309367] split_vma+0xc6/0x110 [ 30.309817] mprotect_fixup+0x8d2/0xb30 [ 30.310332] do_mprotect_pkey+0x87e/0xd40 [ 30.310866] __x64_sys_mprotect+0x78/0xc0 [ 30.311401] do_syscall_64+0x3f/0x90 [ 30.311890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.312567] [ 30.312790] Freed by task 19: [ 30.313184] kasan_save_stack+0x22/0x50 [ 30.313703] kasan_set_track+0x25/0x30 [ 30.314206] kasan_save_free_info+0x2b/0x50 [ 30.314759] __kasan_slab_free+0x10a/0x190 [ 30.315303] kmem_cache_free+0x10d/0x4d0 [ 30.315824] rcu_core+0x8c8/0x2860 [ 30.316300] __do_softirq+0x1b7/0x7d4 [ 30.316789] [ 30.317008] Last potentially related work creation: [ 30.317626] kasan_save_stack+0x22/0x50 [ 30.318139] __kasan_record_aux_stack+0x8e/0xa0 [ 30.318737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.319398] remove_vma+0x139/0x170 [ 30.319865] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.320454] do_vmi_munmap+0x1f1/0x2b0 [ 30.320948] __vm_munmap+0x138/0x3a0 [ 30.321434] __x64_sys_munmap+0x59/0x80 [ 30.321973] do_syscall_64+0x3f/0x90 [ 30.322445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323092] [ 30.323308] The buggy address belongs to the object at ffff8880165e0658 [ 30.323308] which belongs to the cache vm_area_struct of size 168 [ 30.324787] The buggy address is located 88 bytes inside of [ 30.324787] freed 168-byte region [ffff8880165e0658, ffff8880165e0700) [ 30.326194] [ 30.326409] The buggy address belongs to the physical page: [ 30.327062] page:000000007a09c56c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165e0 [ 30.328145] memcg:ffff88800d6e5b01 [ 30.328586] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.329230] page_type: 0xffffffff() [ 30.329677] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.330586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e5b01 [ 30.331479] page dumped because: kasan: bad access detected [ 30.332146] [ 30.332372] Memory state around the buggy address: [ 30.332957] ffff8880165e0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.333803] ffff8880165e0600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.334667] >ffff8880165e0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.335508] ^ [ 30.336089] ffff8880165e0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.336952] ffff8880165e0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.337800] ================================================================== [ 30.338925] Disabling lock debugging due to kernel taint [ 32.417655] BUG: Bad rss-counter state mm:000000002aade7bf type:MM_FILEPAGES val:33 [ 32.418852] BUG: Bad rss-counter state mm:000000002aade7bf type:MM_ANONPAGES val:22 [ 32.949199] BUG: Bad rss-counter state mm:00000000a9f9632e type:MM_FILEPAGES val:33 [ 32.950368] BUG: Bad rss-counter state mm:00000000a9f9632e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51823' (ECDSA) to the list of known hosts. 2023/06/20 17:04:09 fuzzer started 2023/06/20 17:04:09 dialing manager at localhost:36067 2023/06/20 17:04:09 checking machine... 2023/06/20 17:04:09 checking revisions... [ 33.624054] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:04:09 testing simple program... [ 33.682720] cgroup: Unknown subsys name 'net' [ 33.728962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:09 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff888009a28000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff88800f4477d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffffed1001345001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-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 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=0000559d04e33d44 CR3=0000000019de6000 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=00000000000000687361622f6e69622f XMM02=ffffffffffffff000000000000000000 XMM03=0000000000000000000000ff000000ff XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=000000000000000000007ff66ec2b1a0 XMM06=00005572fbc304c00000000000000000 XMM07=ffffffffffffffff000000000000000e XMM08=73252f7325007325203a647763746567 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000a18e31c RBX=00000000ec227782 RCX=ffff8880146875e8 RDX=0000000000000012 RSI=0000000000000018 RDI=000000002d68f158 RBP=0000000000000000 RSP=ffff888014687550 R8 =000000002d68f158 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=ffff8880146875b8 R15=0000000000000012 RIP=ffffffff82270492 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9a54cd9900 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=00007f9a540dc870 CR3=000000000965c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b3100fbbfaea747f00000000000ae988 XMM05=1f35a77582e57b0300000000001328d8 XMM06=4fda316b135da52b00000000001316c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000