syzkaller login: [ 33.715760] BUG: Bad rss-counter state mm:00000000a042547b type:MM_FILEPAGES val:33 [ 33.716991] BUG: Bad rss-counter state mm:00000000a042547b type:MM_ANONPAGES val:22 [ 33.757640] ================================================================== [ 33.758615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.759579] Read of size 8 at addr ffff88800e3e8140 by task sshd/219 [ 33.760354] [ 33.760571] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.761436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.762416] Call Trace: [ 33.762738] [ 33.763039] dump_stack_lvl+0x91/0xf0 [ 33.763539] print_report+0xcc/0x620 [ 33.764029] ? __virt_addr_valid+0x102/0x340 [ 33.764594] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.765233] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.765868] kasan_report+0xbe/0xf0 [ 33.766355] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.766977] vma_interval_tree_remove+0xc75/0xec0 [ 33.767575] vma_prepare+0xc54/0x11a0 [ 33.768057] __split_vma+0x5af/0x950 [ 33.768536] ? __pfx___split_vma+0x10/0x10 [ 33.769065] ? find_held_lock+0x2c/0x110 [ 33.769592] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.770167] ? lock_is_held_type+0x9f/0x120 [ 33.770699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.771325] ? mtree_range_walk+0x632/0x900 [ 33.771866] ? mas_walk+0x5c7/0x7c0 [ 33.772332] do_vmi_munmap+0x1f1/0x2b0 [ 33.772814] mmap_region+0x1f9/0x2660 [ 33.773289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.773794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.774500] ? __pfx_lock_acquire+0x10/0x10 [ 33.775037] ? __pfx_mmap_region+0x10/0x10 [ 33.775558] ? security_mmap_addr+0x7d/0xa0 [ 33.776085] ? get_unmapped_area+0x1f5/0x3f0 [ 33.776630] do_mmap+0x854/0xf00 [ 33.777064] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.777549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.778106] ksys_mmap_pgoff+0x3af/0x500 [ 33.778602] do_syscall_64+0x3f/0x90 [ 33.779081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.779720] RIP: 0033:0x7fe81103fd82 [ 33.780171] 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 [ 33.782256] RSP: 002b:00007ffc8522bf38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.783356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe81103fd82 [ 33.784191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe810479000 [ 33.785029] RBP: 00007fe810479000 R08: 0000000000000009 R09: 0000000000001000 [ 33.785881] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557106debec0 [ 33.786721] R13: 00007ffc8522bf50 R14: 00007ffc8522bf80 R15: 00007ffc8522c2e0 [ 33.787574] [ 33.787864] [ 33.788076] Allocated by task 212: [ 33.788510] kasan_save_stack+0x22/0x50 [ 33.789017] kasan_set_track+0x25/0x30 [ 33.789511] __kasan_slab_alloc+0x59/0x70 [ 33.790031] kmem_cache_alloc+0x16b/0x370 [ 33.790547] vm_area_dup+0x20/0x160 [ 33.791000] __split_vma+0x170/0x950 [ 33.791458] split_vma+0xc6/0x110 [ 33.791892] mprotect_fixup+0x8d2/0xb30 [ 33.792396] do_mprotect_pkey+0x87e/0xd40 [ 33.792909] __x64_sys_mprotect+0x78/0xc0 [ 33.793429] do_syscall_64+0x3f/0x90 [ 33.793904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.794536] [ 33.794748] Freed by task 212: [ 33.795149] kasan_save_stack+0x22/0x50 [ 33.795647] kasan_set_track+0x25/0x30 [ 33.796140] kasan_save_free_info+0x2b/0x50 [ 33.796677] __kasan_slab_free+0x10a/0x190 [ 33.797207] kmem_cache_free+0x10d/0x4d0 [ 33.797730] rcu_core+0x8c8/0x2860 [ 33.798190] __do_softirq+0x1b7/0x7d4 [ 33.798680] [ 33.798912] Last potentially related work creation: [ 33.799511] kasan_save_stack+0x22/0x50 [ 33.800030] __kasan_record_aux_stack+0x8e/0xa0 [ 33.800618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.801279] remove_vma+0x139/0x170 [ 33.801740] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.802310] do_vmi_munmap+0x1f1/0x2b0 [ 33.802805] __vm_munmap+0x138/0x3a0 [ 33.803311] __x64_sys_munmap+0x59/0x80 [ 33.803816] do_syscall_64+0x3f/0x90 [ 33.804301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.804963] [ 33.805184] The buggy address belongs to the object at ffff88800e3e80e8 [ 33.805184] which belongs to the cache vm_area_struct of size 168 [ 33.806703] The buggy address is located 88 bytes inside of [ 33.806703] freed 168-byte region [ffff88800e3e80e8, ffff88800e3e8190) [ 33.808167] [ 33.808391] The buggy address belongs to the physical page: [ 33.809072] page:00000000cbee8484 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3e8 [ 33.810178] memcg:ffff88800d2fad01 [ 33.810612] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.811342] page_type: 0xffffffff() [ 33.811807] raw: 0100000000000200 ffff88800879fc80 ffffea00003e0c00 dead000000000007 [ 33.812760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2fad01 [ 33.813699] page dumped because: kasan: bad access detected [ 33.814380] [ 33.814602] Memory state around the buggy address: [ 33.815220] ffff88800e3e8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.816098] ffff88800e3e8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.816990] >ffff88800e3e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.817873] ^ [ 33.818533] ffff88800e3e8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.819429] ffff88800e3e8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.820306] ================================================================== [ 33.821668] Disabling lock debugging due to kernel taint [ 35.671601] BUG: Bad rss-counter state mm:00000000c6cbcc8d type:MM_FILEPAGES val:33 [ 35.672763] BUG: Bad rss-counter state mm:00000000c6cbcc8d type:MM_ANONPAGES val:22 [ 36.129999] BUG: Bad rss-counter state mm:0000000044a445b0 type:MM_FILEPAGES val:33 [ 36.131483] BUG: Bad rss-counter state mm:0000000044a445b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39101' (ECDSA) to the list of known hosts. 2023/06/19 16:57:15 fuzzer started 2023/06/19 16:57:16 dialing manager at localhost:44161 2023/06/19 16:57:16 checking machine... 2023/06/19 16:57:16 checking revisions... [ 36.906449] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:57:16 testing simple program... [ 36.953540] cgroup: Unknown subsys name 'net' [ 36.994763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:13 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009805850 RCX=0000000000000000 RDX=ffffffff813782a8 RSI=ffff888009805850 RDI=ffff888000000000 RBP=ffffffff813782a8 RSP=ffff888008d7fcf0 R8 =ffffea0000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff888009805850 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff8880098058d0 RIP=ffffffff8180c7f5 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 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=00007ffcccee3918 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=00007f60e7de2510000055a7cc932790 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=0000000000000046 RBX=00000000fffff7b8 RCX=0000000000000005 RDX=0000000000000000 RSI=1ffffffff0ba7a02 RDI=ffff888014734440 RBP=ffff888014734000 RSP=ffff888008e57be0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88800f592000 R13=00000000fffff7b8 R14=0000000000000000 R15=ffff88806cf361f0 RIP=ffffffff8182ddaf RFL=00000046 [---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 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=00007f2264645650 CR3=000000000e87c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000