syzkaller login: [ 31.732305] BUG: Bad rss-counter state mm:00000000a7f47869 type:MM_FILEPAGES val:33 [ 31.733359] BUG: Bad rss-counter state mm:00000000a7f47869 type:MM_ANONPAGES val:22 [ 31.799863] ================================================================== [ 31.800938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.802054] Read of size 8 at addr ffff88800c78d140 by task sshd/219 [ 31.803039] [ 31.803262] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.804143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.805142] Call Trace: [ 31.805460] [ 31.805750] dump_stack_lvl+0x91/0xf0 [ 31.806241] print_report+0xcc/0x620 [ 31.806722] ? __virt_addr_valid+0x102/0x340 [ 31.807272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.807907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.808518] kasan_report+0xbe/0xf0 [ 31.808991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.809614] vma_interval_tree_remove+0xc75/0xec0 [ 31.810226] vma_prepare+0xc54/0x11a0 [ 31.810706] __split_vma+0x5af/0x950 [ 31.811180] ? __pfx___split_vma+0x10/0x10 [ 31.811728] ? find_held_lock+0x2c/0x110 [ 31.812257] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.812817] ? lock_is_held_type+0x9f/0x120 [ 31.813366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.813970] ? mtree_range_walk+0x632/0x900 [ 31.814516] ? mas_walk+0x5c7/0x7c0 [ 31.814991] do_vmi_munmap+0x1f1/0x2b0 [ 31.815494] mmap_region+0x1f9/0x2660 [ 31.815975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.816487] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.817199] ? __pfx_lock_acquire+0x10/0x10 [ 31.817735] ? __pfx_mmap_region+0x10/0x10 [ 31.818283] ? security_mmap_addr+0x7d/0xa0 [ 31.818820] ? get_unmapped_area+0x1f5/0x3f0 [ 31.819395] do_mmap+0x854/0xf00 [ 31.819850] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.820364] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.820934] ksys_mmap_pgoff+0x3af/0x500 [ 31.821451] do_syscall_64+0x3f/0x90 [ 31.821929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.822581] RIP: 0033:0x7fd4c40bdd82 [ 31.823037] 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 [ 31.825178] RSP: 002b:00007fffaca29a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.826102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4c40bdd82 [ 31.826947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4c34f7000 [ 31.827809] RBP: 00007fd4c34f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.828660] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557682f44f60 [ 31.829511] R13: 00007fffaca29a70 R14: 00007fffaca29aa0 R15: 00007fffaca29e00 [ 31.830372] [ 31.830661] [ 31.830879] Allocated by task 212: [ 31.831324] kasan_save_stack+0x22/0x50 [ 31.831834] kasan_set_track+0x25/0x30 [ 31.832329] __kasan_slab_alloc+0x59/0x70 [ 31.832853] kmem_cache_alloc+0x16b/0x370 [ 31.833375] vm_area_dup+0x20/0x160 [ 31.833832] __split_vma+0x170/0x950 [ 31.834310] split_vma+0xc6/0x110 [ 31.834746] mprotect_fixup+0x8d2/0xb30 [ 31.835253] do_mprotect_pkey+0x87e/0xd40 [ 31.835788] __x64_sys_mprotect+0x78/0xc0 [ 31.836312] do_syscall_64+0x3f/0x90 [ 31.836784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.837426] [ 31.837640] Freed by task 212: [ 31.838034] kasan_save_stack+0x22/0x50 [ 31.838538] kasan_set_track+0x25/0x30 [ 31.839031] kasan_save_free_info+0x2b/0x50 [ 31.839572] __kasan_slab_free+0x10a/0x190 [ 31.840106] kmem_cache_free+0x10d/0x4d0 [ 31.840608] rcu_core+0x8c8/0x2860 [ 31.841056] __do_softirq+0x1b7/0x7d4 [ 31.841534] [ 31.841751] Last potentially related work creation: [ 31.842331] kasan_save_stack+0x22/0x50 [ 31.842834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.843424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.844076] remove_vma+0x139/0x170 [ 31.844532] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.845088] do_vmi_munmap+0x1f1/0x2b0 [ 31.845572] __vm_munmap+0x138/0x3a0 [ 31.846041] __x64_sys_munmap+0x59/0x80 [ 31.846537] do_syscall_64+0x3f/0x90 [ 31.847009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.847657] [ 31.847873] Second to last potentially related work creation: [ 31.848557] kasan_save_stack+0x22/0x50 [ 31.849059] __kasan_record_aux_stack+0x8e/0xa0 [ 31.849637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.850281] remove_vma+0x139/0x170 [ 31.850731] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.851309] do_vmi_munmap+0x1f1/0x2b0 [ 31.851795] mmap_region+0x1f9/0x2660 [ 31.852270] do_mmap+0x854/0xf00 [ 31.852700] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.853185] ksys_mmap_pgoff+0x3af/0x500 [ 31.853690] do_syscall_64+0x3f/0x90 [ 31.854161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854806] [ 31.855021] The buggy address belongs to the object at ffff88800c78d0e8 [ 31.855021] which belongs to the cache vm_area_struct of size 168 [ 31.856497] The buggy address is located 88 bytes inside of [ 31.856497] freed 168-byte region [ffff88800c78d0e8, ffff88800c78d190) [ 31.857910] [ 31.858126] The buggy address belongs to the physical page: [ 31.858782] page:000000000d3dcc78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc78d [ 31.859876] memcg:ffff88800ed45c01 [ 31.860311] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.860958] page_type: 0xffffffff() [ 31.861410] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.862330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed45c01 [ 31.863236] page dumped because: kasan: bad access detected [ 31.863916] [ 31.864131] Memory state around the buggy address: [ 31.864708] ffff88800c78d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.865561] ffff88800c78d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.866412] >ffff88800c78d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.867259] ^ [ 31.867903] ffff88800c78d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.868751] ffff88800c78d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.869605] ================================================================== [ 31.870575] Disabling lock debugging due to kernel taint [ 33.736875] BUG: Bad rss-counter state mm:00000000c695a00a type:MM_FILEPAGES val:33 [ 33.738362] BUG: Bad rss-counter state mm:00000000c695a00a type:MM_ANONPAGES val:22 [ 34.200129] BUG: Bad rss-counter state mm:00000000dbb7fa07 type:MM_FILEPAGES val:33 [ 34.201719] BUG: Bad rss-counter state mm:00000000dbb7fa07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44304' (ECDSA) to the list of known hosts. 2023/06/19 11:48:47 fuzzer started 2023/06/19 11:48:47 dialing manager at localhost:44161 2023/06/19 11:48:47 checking machine... 2023/06/19 11:48:47 checking revisions... [ 34.948762] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:48:48 testing simple program... [ 35.001875] cgroup: Unknown subsys name 'net' [ 35.041021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:47 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=00007f9196d42340 CR3=000000000d75e000 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=3b965be0277caeab57419da63a73ed46 XMM02=ec2efd57dc4c00df000000000011cd40 XMM03=ab3f45f27289bd17000000000011ce10 XMM04=29988d950e869d7d00000000000ae988 XMM05=dfcdbad4f1609c370000000000135240 XMM06=806171799158d96700000000001350c8 XMM07=e042d86d42eb936e0000000000124570 XMM08=ab3f45f27289bd17000000000011ce10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ff2f6804618 CR3=000000000e2ba000 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=2037343a38343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a38343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000