syzkaller login: [ 30.575685] BUG: Bad rss-counter state mm:000000003ca22ed1 type:MM_FILEPAGES val:33 [ 30.577527] BUG: Bad rss-counter state mm:000000003ca22ed1 type:MM_ANONPAGES val:22 [ 30.756370] ================================================================== [ 30.757453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.758761] Read of size 8 at addr ffff8880094ecc20 by task sshd/220 [ 30.759669] [ 30.759927] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.760986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.762011] Call Trace: [ 30.762327] [ 30.762613] dump_stack_lvl+0x91/0xf0 [ 30.763114] print_report+0xcc/0x620 [ 30.763597] ? __virt_addr_valid+0x102/0x340 [ 30.764148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764772] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765404] kasan_report+0xbe/0xf0 [ 30.765878] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.766490] vma_interval_tree_remove+0xc75/0xec0 [ 30.767096] vma_prepare+0xc54/0x11a0 [ 30.767570] __split_vma+0x5af/0x950 [ 30.768048] ? __pfx___split_vma+0x10/0x10 [ 30.768581] ? find_held_lock+0x2c/0x110 [ 30.769106] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.769674] ? lock_is_held_type+0x9f/0x120 [ 30.770211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.770816] ? mtree_range_walk+0x632/0x900 [ 30.771362] ? mas_walk+0x5c7/0x7c0 [ 30.771835] do_vmi_munmap+0x1f1/0x2b0 [ 30.772323] mmap_region+0x1f9/0x2660 [ 30.772822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.773333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.774043] ? __pfx_lock_acquire+0x10/0x10 [ 30.774584] ? __pfx_mmap_region+0x10/0x10 [ 30.775112] ? security_mmap_addr+0x7d/0xa0 [ 30.775646] ? get_unmapped_area+0x1f5/0x3f0 [ 30.776207] do_mmap+0x854/0xf00 [ 30.776655] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.777155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.777713] ksys_mmap_pgoff+0x3af/0x500 [ 30.778222] do_syscall_64+0x3f/0x90 [ 30.778709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779363] RIP: 0033:0x7fccc03bed82 [ 30.779829] 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 [ 30.781979] RSP: 002b:00007fff275f0c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.782896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccc03bed82 [ 30.783747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccbf7f8000 [ 30.784612] RBP: 00007fccbf7f8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.785478] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d812acec0 [ 30.786324] R13: 00007fff275f0c20 R14: 00007fff275f0c50 R15: 00007fff275f0fb0 [ 30.787174] [ 30.787465] [ 30.787683] Allocated by task 213: [ 30.788107] kasan_save_stack+0x22/0x50 [ 30.788637] kasan_set_track+0x25/0x30 [ 30.789134] __kasan_slab_alloc+0x59/0x70 [ 30.789655] kmem_cache_alloc+0x16b/0x370 [ 30.790164] vm_area_dup+0x20/0x160 [ 30.790623] __split_vma+0x170/0x950 [ 30.791164] split_vma+0xc6/0x110 [ 30.791602] mprotect_fixup+0x8d2/0xb30 [ 30.792110] do_mprotect_pkey+0x87e/0xd40 [ 30.792655] __x64_sys_mprotect+0x78/0xc0 [ 30.793177] do_syscall_64+0x3f/0x90 [ 30.793659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794306] [ 30.794520] Freed by task 213: [ 30.794914] kasan_save_stack+0x22/0x50 [ 30.795419] kasan_set_track+0x25/0x30 [ 30.795909] kasan_save_free_info+0x2b/0x50 [ 30.796452] __kasan_slab_free+0x10a/0x190 [ 30.796983] kmem_cache_free+0x10d/0x4d0 [ 30.797485] rcu_core+0x8c8/0x2860 [ 30.797933] __do_softirq+0x1b7/0x7d4 [ 30.798412] [ 30.798627] Last potentially related work creation: [ 30.799221] kasan_save_stack+0x22/0x50 [ 30.799728] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.801072] remove_vma+0x139/0x170 [ 30.801522] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802082] do_vmi_munmap+0x1f1/0x2b0 [ 30.802582] __vm_munmap+0x138/0x3a0 [ 30.803050] __x64_sys_munmap+0x59/0x80 [ 30.803543] do_syscall_64+0x3f/0x90 [ 30.804025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804692] [ 30.804908] The buggy address belongs to the object at ffff8880094ecbc8 [ 30.804908] which belongs to the cache vm_area_struct of size 168 [ 30.806408] The buggy address is located 88 bytes inside of [ 30.806408] freed 168-byte region [ffff8880094ecbc8, ffff8880094ecc70) [ 30.807825] [ 30.808039] The buggy address belongs to the physical page: [ 30.808723] page:0000000000dff507 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94ec [ 30.809814] memcg:ffff888009686301 [ 30.810238] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.810891] page_type: 0xffffffff() [ 30.811350] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.812269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009686301 [ 30.813211] page dumped because: kasan: bad access detected [ 30.813879] [ 30.814108] Memory state around the buggy address: [ 30.814716] ffff8880094ecb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.815619] ffff8880094ecb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.816529] >ffff8880094ecc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.817431] ^ [ 30.818012] ffff8880094ecc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.818916] ffff8880094ecd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.819816] ================================================================== [ 30.820854] Disabling lock debugging due to kernel taint [ 32.863839] BUG: Bad rss-counter state mm:00000000758c1e83 type:MM_FILEPAGES val:33 [ 32.864863] BUG: Bad rss-counter state mm:00000000758c1e83 type:MM_ANONPAGES val:22 [ 33.348626] BUG: Bad rss-counter state mm:00000000b8d5a007 type:MM_FILEPAGES val:33 [ 33.349659] BUG: Bad rss-counter state mm:00000000b8d5a007 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47194' (ECDSA) to the list of known hosts. 2023/06/20 21:31:21 fuzzer started 2023/06/20 21:31:22 dialing manager at localhost:36067 2023/06/20 21:31:22 checking machine... 2023/06/20 21:31:22 checking revisions... [ 34.091595] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:31:22 testing simple program... [ 34.158182] cgroup: Unknown subsys name 'net' [ 34.217186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:31:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffadbcd728 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=00007fc2a8c455100000556b5e240790 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=1ffffffff0bc158a RBX=ffffffff85e0ac54 RCX=ffffffff818c8500 RDX=0000000000000000 RSI=ffffffff8614c0e0 RDI=ffffffff85e0ac54 RBP=ffffffff85e0ac54 RSP=ffff8880147a7210 R8 =ffffffff8614c0e0 R9 =ffff8880147a7308 R10=0000000000038001 R11=00000000000240a4 R12=ffffffff85e0ac54 R13=ffffffff85e0ac54 R14=ffffffff85e0ac54 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007fdcb9443900 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=00007f27b236d650 CR3=000000000c7b2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0bc2f95c46f9fe5d00000000000ae988 XMM05=c0aa008a208ee4480000000000133618 XMM06=b4bda1b0c2fe7a2c00000000001323b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000