syzkaller login: [ 30.494192] BUG: Bad rss-counter state mm:00000000eb6f5dc1 type:MM_FILEPAGES val:33 [ 30.495412] BUG: Bad rss-counter state mm:00000000eb6f5dc1 type:MM_ANONPAGES val:22 [ 30.633817] ================================================================== [ 30.635059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.636095] Read of size 8 at addr ffff88800ce6c6b0 by task sshd/219 [ 30.636909] [ 30.637144] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.638074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.639132] Call Trace: [ 30.639472] [ 30.639771] dump_stack_lvl+0x91/0xf0 [ 30.640293] print_report+0xcc/0x620 [ 30.640805] ? __virt_addr_valid+0x102/0x340 [ 30.641391] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642046] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642701] kasan_report+0xbe/0xf0 [ 30.643218] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643879] vma_interval_tree_remove+0xc75/0xec0 [ 30.644514] vma_prepare+0xc54/0x11a0 [ 30.645026] __split_vma+0x5af/0x950 [ 30.645532] ? __pfx___split_vma+0x10/0x10 [ 30.646092] ? find_held_lock+0x2c/0x110 [ 30.646647] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.647286] ? lock_is_held_type+0x9f/0x120 [ 30.647859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.648509] ? mtree_range_walk+0x632/0x900 [ 30.649099] ? mas_walk+0x5c7/0x7c0 [ 30.649603] do_vmi_munmap+0x1f1/0x2b0 [ 30.650131] mmap_region+0x1f9/0x2660 [ 30.650644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.651194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651949] ? __pfx_lock_acquire+0x10/0x10 [ 30.652515] ? __pfx_mmap_region+0x10/0x10 [ 30.653078] ? security_mmap_addr+0x7d/0xa0 [ 30.653646] ? get_unmapped_area+0x1f5/0x3f0 [ 30.654226] do_mmap+0x854/0xf00 [ 30.654691] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.655223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.655822] ksys_mmap_pgoff+0x3af/0x500 [ 30.656363] do_syscall_64+0x3f/0x90 [ 30.656873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657560] RIP: 0033:0x7f121d0c8d82 [ 30.658043] 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 [ 30.660313] RSP: 002b:00007ffd85494a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.661272] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f121d0c8d82 [ 30.662172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f121c502000 [ 30.663098] RBP: 00007f121c502000 R08: 0000000000000009 R09: 0000000000001000 [ 30.664018] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577236fab20 [ 30.664917] R13: 00007ffd85494ab0 R14: 00007ffd85494ae0 R15: 00007ffd85494e40 [ 30.665836] [ 30.666159] [ 30.666391] Allocated by task 212: [ 30.666872] kasan_save_stack+0x22/0x50 [ 30.667418] kasan_set_track+0x25/0x30 [ 30.667943] __kasan_slab_alloc+0x59/0x70 [ 30.668495] kmem_cache_alloc+0x16b/0x370 [ 30.669053] vm_area_dup+0x20/0x160 [ 30.669540] __split_vma+0x170/0x950 [ 30.670051] split_vma+0xc6/0x110 [ 30.670527] mprotect_fixup+0x8d2/0xb30 [ 30.671072] do_mprotect_pkey+0x87e/0xd40 [ 30.671648] __x64_sys_mprotect+0x78/0xc0 [ 30.672207] do_syscall_64+0x3f/0x90 [ 30.672720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673414] [ 30.673647] Freed by task 212: [ 30.674064] kasan_save_stack+0x22/0x50 [ 30.674600] kasan_set_track+0x25/0x30 [ 30.675147] kasan_save_free_info+0x2b/0x50 [ 30.675719] __kasan_slab_free+0x10a/0x190 [ 30.676294] kmem_cache_free+0x10d/0x4d0 [ 30.676923] rcu_core+0x8c8/0x2860 [ 30.677400] __do_softirq+0x1b7/0x7d4 [ 30.677911] [ 30.678145] Last potentially related work creation: [ 30.678769] kasan_save_stack+0x22/0x50 [ 30.679323] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.680629] remove_vma+0x139/0x170 [ 30.681109] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.681709] do_vmi_munmap+0x1f1/0x2b0 [ 30.682227] __vm_munmap+0x138/0x3a0 [ 30.682725] __x64_sys_munmap+0x59/0x80 [ 30.683269] do_syscall_64+0x3f/0x90 [ 30.683779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684466] [ 30.684695] Second to last potentially related work creation: [ 30.685423] kasan_save_stack+0x22/0x50 [ 30.685962] __kasan_record_aux_stack+0x8e/0xa0 [ 30.686569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.687261] remove_vma+0x139/0x170 [ 30.687739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.688331] do_vmi_munmap+0x1f1/0x2b0 [ 30.688846] __vm_munmap+0x138/0x3a0 [ 30.689346] __x64_sys_munmap+0x59/0x80 [ 30.689873] do_syscall_64+0x3f/0x90 [ 30.690381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691085] [ 30.691317] The buggy address belongs to the object at ffff88800ce6c658 [ 30.691317] which belongs to the cache vm_area_struct of size 168 [ 30.692888] The buggy address is located 88 bytes inside of [ 30.692888] freed 168-byte region [ffff88800ce6c658, ffff88800ce6c700) [ 30.694390] [ 30.694620] The buggy address belongs to the physical page: [ 30.695337] page:000000007f11afa9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce6c [ 30.696496] memcg:ffff88800cd36201 [ 30.696948] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.697642] page_type: 0xffffffff() [ 30.698125] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.699108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd36201 [ 30.700074] page dumped because: kasan: bad access detected [ 30.700783] [ 30.701013] Memory state around the buggy address: [ 30.701628] ffff88800ce6c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.702537] ffff88800ce6c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.703468] >ffff88800ce6c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.704384] ^ [ 30.705005] ffff88800ce6c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.705920] ffff88800ce6c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.706833] ================================================================== [ 30.707990] Disabling lock debugging due to kernel taint [ 32.757125] BUG: Bad rss-counter state mm:00000000c45d9f54 type:MM_FILEPAGES val:33 [ 32.758440] BUG: Bad rss-counter state mm:00000000c45d9f54 type:MM_ANONPAGES val:22 [ 33.323154] BUG: Bad rss-counter state mm:00000000b70e0650 type:MM_FILEPAGES val:33 [ 33.324529] BUG: Bad rss-counter state mm:00000000b70e0650 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26452' (ECDSA) to the list of known hosts. 2023/06/21 02:43:51 fuzzer started 2023/06/21 02:43:52 dialing manager at localhost:36067 2023/06/21 02:43:52 checking machine... 2023/06/21 02:43:52 checking revisions... [ 34.003471] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:43:52 testing simple program... [ 34.054457] cgroup: Unknown subsys name 'net' [ 34.098023] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:51 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710b9 RSP=ffff8880195578c8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000007e R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff812d14ae 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 00007f2c13903700 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=00007fa2ecee50b0 CR3=00000000169de000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031353a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343337 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8117fc9f RDX=ffffed1001b816d6 RSI=0000000000000004 RDI=ffff88800dc0b6a8 RBP=ffff88800dc0cb58 RSP=ffff88806cf09e40 R8 =0000000000000001 R9 =ffffed1001b816d5 R10=ffff88800dc0b6ab R11=0000000000000000 R12=ffff88800dc0b680 R13=ffff88800dc0b6a8 R14=ffff88806cf35000 R15=ffff88800dc0cb58 RIP=ffffffff8117fca7 RFL=00000257 [---ZAPC] 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=00007f18506e3880 CR3=0000000009b6e000 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=217189ad70d62e912c4d0615d02a2545 XMM02=ec2efd57dc4c00df000000000011a268 XMM03=6536d2bd6b9adc21000000000011a338 XMM04=ec3257a0e8f6599500000000000ae988 XMM05=dfcdbad4f1609c370000000000132680 XMM06=806171799158d9670000000000132508 XMM07=e042d86d42eb936e00000000001216f0 XMM08=6536d2bd6b9adc21000000000011a338 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000