syzkaller login: [ 31.618195] BUG: Bad rss-counter state mm:000000004f58d744 type:MM_FILEPAGES val:33 [ 31.619408] BUG: Bad rss-counter state mm:000000004f58d744 type:MM_ANONPAGES val:22 [ 31.658803] ================================================================== [ 31.660110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.661493] Read of size 8 at addr ffff88800b3ba3f8 by task sshd/220 [ 31.662655] [ 31.662871] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.663684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.664614] Call Trace: [ 31.664938] [ 31.665212] dump_stack_lvl+0x91/0xf0 [ 31.665683] print_report+0xcc/0x620 [ 31.666144] ? __virt_addr_valid+0x102/0x340 [ 31.666663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.667246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.667828] kasan_report+0xbe/0xf0 [ 31.668278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.668878] vma_interval_tree_remove+0xc75/0xec0 [ 31.669475] vma_prepare+0xc54/0x11a0 [ 31.669956] __split_vma+0x5af/0x950 [ 31.670425] ? __pfx___split_vma+0x10/0x10 [ 31.670961] ? find_held_lock+0x2c/0x110 [ 31.671489] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.672043] ? lock_is_held_type+0x9f/0x120 [ 31.672575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.673191] ? mtree_range_walk+0x632/0x900 [ 31.673735] ? mas_walk+0x5c7/0x7c0 [ 31.674219] do_vmi_munmap+0x1f1/0x2b0 [ 31.674711] mmap_region+0x1f9/0x2660 [ 31.675192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.675704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.676417] ? __pfx_lock_acquire+0x10/0x10 [ 31.676956] ? __pfx_mmap_region+0x10/0x10 [ 31.677485] ? security_mmap_addr+0x7d/0xa0 [ 31.678012] ? get_unmapped_area+0x1f5/0x3f0 [ 31.678560] do_mmap+0x854/0xf00 [ 31.678996] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.679482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.680035] ksys_mmap_pgoff+0x3af/0x500 [ 31.680550] do_syscall_64+0x3f/0x90 [ 31.681049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.681694] RIP: 0033:0x7fcc5b878d82 [ 31.682140] 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 [ 31.684240] RSP: 002b:00007ffc4cdab198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.685172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc5b878d82 [ 31.686014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc5acb2000 [ 31.686867] RBP: 00007fcc5acb2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.687709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3b72b8f70 [ 31.688559] R13: 00007ffc4cdab1b0 R14: 00007ffc4cdab1e0 R15: 00007ffc4cdab540 [ 31.689517] [ 31.689872] [ 31.690082] Allocated by task 213: [ 31.690516] kasan_save_stack+0x22/0x50 [ 31.691063] kasan_set_track+0x25/0x30 [ 31.691596] __kasan_slab_alloc+0x59/0x70 [ 31.692142] kmem_cache_alloc+0x16b/0x370 [ 31.692671] vm_area_dup+0x20/0x160 [ 31.693137] __split_vma+0x170/0x950 [ 31.693596] split_vma+0xc6/0x110 [ 31.694027] mprotect_fixup+0x8d2/0xb30 [ 31.694528] do_mprotect_pkey+0x87e/0xd40 [ 31.695132] __x64_sys_mprotect+0x78/0xc0 [ 31.695727] do_syscall_64+0x3f/0x90 [ 31.696236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.696893] [ 31.697106] Freed by task 13: [ 31.697482] kasan_save_stack+0x22/0x50 [ 31.697977] kasan_set_track+0x25/0x30 [ 31.698475] kasan_save_free_info+0x2b/0x50 [ 31.699004] __kasan_slab_free+0x10a/0x190 [ 31.699578] kmem_cache_free+0x10d/0x4d0 [ 31.700093] rcu_core+0x8c8/0x2860 [ 31.700585] __do_softirq+0x1b7/0x7d4 [ 31.701172] [ 31.701438] Last potentially related work creation: [ 31.702163] kasan_save_stack+0x22/0x50 [ 31.702777] __kasan_record_aux_stack+0x8e/0xa0 [ 31.703471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.704252] remove_vma+0x139/0x170 [ 31.704823] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.705386] do_vmi_munmap+0x1f1/0x2b0 [ 31.705874] __vm_munmap+0x138/0x3a0 [ 31.706341] __x64_sys_munmap+0x59/0x80 [ 31.706837] do_syscall_64+0x3f/0x90 [ 31.707310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.707952] [ 31.708171] Second to last potentially related work creation: [ 31.708879] kasan_save_stack+0x22/0x50 [ 31.709379] __kasan_record_aux_stack+0x8e/0xa0 [ 31.709968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.710609] remove_vma+0x139/0x170 [ 31.711053] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.711604] do_vmi_munmap+0x1f1/0x2b0 [ 31.712090] mmap_region+0x1f9/0x2660 [ 31.712564] do_mmap+0x854/0xf00 [ 31.712996] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.713493] ksys_mmap_pgoff+0x3af/0x500 [ 31.713996] do_syscall_64+0x3f/0x90 [ 31.714475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.715117] [ 31.715327] The buggy address belongs to the object at ffff88800b3ba3a0 [ 31.715327] which belongs to the cache vm_area_struct of size 168 [ 31.716806] The buggy address is located 88 bytes inside of [ 31.716806] freed 168-byte region [ffff88800b3ba3a0, ffff88800b3ba448) [ 31.718207] [ 31.718420] The buggy address belongs to the physical page: [ 31.719078] page:0000000037f6dc84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3ba [ 31.720159] memcg:ffff888013b8c001 [ 31.720583] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.721243] page_type: 0xffffffff() [ 31.721685] raw: 0100000000000200 ffff8880087a0c80 ffffea0000353940 dead000000000006 [ 31.722600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b8c001 [ 31.723510] page dumped because: kasan: bad access detected [ 31.724175] [ 31.724389] Memory state around the buggy address: [ 31.724971] ffff88800b3ba280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.725817] ffff88800b3ba300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.726672] >ffff88800b3ba380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.727519] ^ [ 31.728360] ffff88800b3ba400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.729215] ffff88800b3ba480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.730070] ================================================================== [ 31.731136] Disabling lock debugging due to kernel taint [ 33.814525] BUG: Bad rss-counter state mm:0000000079210f70 type:MM_FILEPAGES val:33 [ 33.815519] BUG: Bad rss-counter state mm:0000000079210f70 type:MM_ANONPAGES val:22 [ 34.326084] BUG: Bad rss-counter state mm:00000000e21eb0fb type:MM_FILEPAGES val:33 [ 34.327390] BUG: Bad rss-counter state mm:00000000e21eb0fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2158' (ECDSA) to the list of known hosts. 2023/06/20 20:47:53 fuzzer started 2023/06/20 20:47:53 dialing manager at localhost:36067 2023/06/20 20:47:53 checking machine... 2023/06/20 20:47:53 checking revisions... [ 34.973467] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:47:53 testing simple program... [ 35.018470] cgroup: Unknown subsys name 'net' [ 35.070763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:52 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc16 RBX=ffffffff85dfe0b0 RCX=ffffffff8180ca59 RDX=0000000000000000 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffffffff85dfe0a0 RSP=ffff88806ce099e0 R8 =ffffffff86138f52 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffffffff85dfe0c0 R13=ffffffff85dfe0a0 R14=ffffffff85dfe0a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =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=00007ffcdf0a4368 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=00007f3f6f595510000055692aa55790 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=ffffffff83640ed0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d947c01 RSI=ffff88800d947c20 RDI=ffff88800d947c20 RBP=ffff88800d947498 RSP=ffff88800d9473c8 R8 =ffffffff863b30ba R9 =ffff88800d947480 R10=0000000000038001 R11=000000000008a89d R12=ffff88800d9474a0 R13=ffff88800d947488 R14=ffff88800d947c28 R15=ffff88800d947440 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fc973293900 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=00007fb164338650 CR3=000000000c9e4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0ea6edd81961018000000000000ae988 XMM05=a46fe23205b776980000000000133ea8 XMM06=4fda316b135da52b0000000000132c98 XMM07=fb795ef6d65770560000000000121bd0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000