syzkaller login: [ 31.178263] BUG: Bad rss-counter state mm:0000000052523c4d type:MM_FILEPAGES val:33 [ 31.179472] BUG: Bad rss-counter state mm:0000000052523c4d type:MM_ANONPAGES val:22 [ 31.363347] ================================================================== [ 31.364441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.365725] Read of size 8 at addr ffff88801692fc20 by task sshd/220 [ 31.366631] [ 31.366888] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.367932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.369003] Call Trace: [ 31.369339] [ 31.369627] dump_stack_lvl+0x91/0xf0 [ 31.370114] print_report+0xcc/0x620 [ 31.370597] ? __virt_addr_valid+0x102/0x340 [ 31.371144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371757] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372372] kasan_report+0xbe/0xf0 [ 31.372849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.373492] vma_interval_tree_remove+0xc75/0xec0 [ 31.374102] vma_prepare+0xc54/0x11a0 [ 31.374599] __split_vma+0x5af/0x950 [ 31.375084] ? __pfx___split_vma+0x10/0x10 [ 31.375616] ? find_held_lock+0x2c/0x110 [ 31.376137] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.376698] ? lock_is_held_type+0x9f/0x120 [ 31.377243] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.377877] ? mtree_range_walk+0x632/0x900 [ 31.378426] ? mas_walk+0x5c7/0x7c0 [ 31.378909] do_vmi_munmap+0x1f1/0x2b0 [ 31.379410] mmap_region+0x1f9/0x2660 [ 31.379895] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.380414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.381132] ? __pfx_lock_acquire+0x10/0x10 [ 31.381670] ? __pfx_mmap_region+0x10/0x10 [ 31.382204] ? security_mmap_addr+0x7d/0xa0 [ 31.382746] ? get_unmapped_area+0x1f5/0x3f0 [ 31.383299] do_mmap+0x854/0xf00 [ 31.383752] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.384249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.384832] ksys_mmap_pgoff+0x3af/0x500 [ 31.385362] do_syscall_64+0x3f/0x90 [ 31.385855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386502] RIP: 0033:0x7fd58da3fd82 [ 31.386972] 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 [ 31.389131] RSP: 002b:00007ffdf63b2d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.390066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd58da3fd82 [ 31.390939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd58ce79000 [ 31.391809] RBP: 00007fd58ce79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.392685] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556803905d90 [ 31.393548] R13: 00007ffdf63b2d20 R14: 00007ffdf63b2d50 R15: 00007ffdf63b30b0 [ 31.394428] [ 31.394722] [ 31.394936] Allocated by task 213: [ 31.395367] kasan_save_stack+0x22/0x50 [ 31.395885] kasan_set_track+0x25/0x30 [ 31.396392] __kasan_slab_alloc+0x59/0x70 [ 31.396921] kmem_cache_alloc+0x16b/0x370 [ 31.397458] vm_area_dup+0x20/0x160 [ 31.397916] __split_vma+0x170/0x950 [ 31.398390] split_vma+0xc6/0x110 [ 31.398837] mprotect_fixup+0x8d2/0xb30 [ 31.399341] do_mprotect_pkey+0x87e/0xd40 [ 31.399865] __x64_sys_mprotect+0x78/0xc0 [ 31.400403] do_syscall_64+0x3f/0x90 [ 31.400883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401552] [ 31.401770] Freed by task 213: [ 31.402169] kasan_save_stack+0x22/0x50 [ 31.402690] kasan_set_track+0x25/0x30 [ 31.403198] kasan_save_free_info+0x2b/0x50 [ 31.403747] __kasan_slab_free+0x10a/0x190 [ 31.404298] kmem_cache_free+0x10d/0x4d0 [ 31.404819] rcu_core+0x8c8/0x2860 [ 31.405270] __do_softirq+0x1b7/0x7d4 [ 31.405780] [ 31.406002] Last potentially related work creation: [ 31.406651] kasan_save_stack+0x22/0x50 [ 31.407166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.407750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.408402] remove_vma+0x139/0x170 [ 31.408863] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.409436] do_vmi_munmap+0x1f1/0x2b0 [ 31.409927] __vm_munmap+0x138/0x3a0 [ 31.410402] __x64_sys_munmap+0x59/0x80 [ 31.410907] do_syscall_64+0x3f/0x90 [ 31.411386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412040] [ 31.412255] The buggy address belongs to the object at ffff88801692fbc8 [ 31.412255] which belongs to the cache vm_area_struct of size 168 [ 31.413749] The buggy address is located 88 bytes inside of [ 31.413749] freed 168-byte region [ffff88801692fbc8, ffff88801692fc70) [ 31.415168] [ 31.415386] The buggy address belongs to the physical page: [ 31.416045] page:0000000031568d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1692f [ 31.417130] memcg:ffff888016e92f01 [ 31.417576] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.418229] page_type: 0xffffffff() [ 31.418681] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.419592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e92f01 [ 31.420488] page dumped because: kasan: bad access detected [ 31.421157] [ 31.421380] Memory state around the buggy address: [ 31.421961] ffff88801692fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.422810] ffff88801692fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.423654] >ffff88801692fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.424509] ^ [ 31.425044] ffff88801692fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.425910] ffff88801692fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.426769] ================================================================== [ 31.427699] Disabling lock debugging due to kernel taint [ 33.830882] BUG: Bad rss-counter state mm:0000000043cb0e1a type:MM_FILEPAGES val:33 [ 33.831889] BUG: Bad rss-counter state mm:0000000043cb0e1a type:MM_ANONPAGES val:22 [ 34.395538] BUG: Bad rss-counter state mm:000000004aa0d978 type:MM_FILEPAGES val:33 [ 34.396715] BUG: Bad rss-counter state mm:000000004aa0d978 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64193' (ECDSA) to the list of known hosts. 2023/06/19 18:44:48 fuzzer started 2023/06/19 18:44:48 dialing manager at localhost:44161 2023/06/19 18:44:48 checking machine... 2023/06/19 18:44:48 checking revisions... [ 35.024463] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:44:49 testing simple program... [ 35.075181] cgroup: Unknown subsys name 'net' [ 35.114136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:47 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=00007f716acee000 CR3=000000000da86000 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=2038343a34343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a34343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007faad1628100 RCX=ffffffff813a0ac9 RDX=ffff8880184b9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88800ecd7530 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880184b9b40 R15=0000000000000014 RIP=ffffffff814c07e0 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 00007faad1135900 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=00007ffe5e2ae000 CR3=000000000fe02000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000