syzkaller login: [ 68.784332] BUG: Bad rss-counter state mm:00000000c0d83525 type:MM_FILEPAGES val:33 [ 68.785507] BUG: Bad rss-counter state mm:00000000c0d83525 type:MM_ANONPAGES val:22 [ 68.946384] ================================================================== [ 68.947248] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.948179] Read of size 8 at addr ffff888010342968 by task sshd/228 [ 68.949083] [ 68.949303] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.950165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.951163] Call Trace: [ 68.951478] [ 68.951758] dump_stack_lvl+0x91/0xf0 [ 68.952245] print_report+0xcc/0x620 [ 68.952764] ? __virt_addr_valid+0x102/0x340 [ 68.953314] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.953927] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.954541] kasan_report+0xbe/0xf0 [ 68.955008] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.955620] vma_interval_tree_remove+0xc75/0xec0 [ 68.956215] vma_prepare+0xc54/0x11a0 [ 68.956726] __split_vma+0x5af/0x950 [ 68.957196] ? __pfx___split_vma+0x10/0x10 [ 68.957748] ? find_held_lock+0x2c/0x110 [ 68.958277] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.958863] ? lock_is_held_type+0x9f/0x120 [ 68.959404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.960005] ? mtree_range_walk+0x632/0x900 [ 68.960556] ? mas_walk+0x5c7/0x7c0 [ 68.961025] do_vmi_munmap+0x1f1/0x2b0 [ 68.961512] mmap_region+0x1f9/0x2660 [ 68.962032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.962570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.963283] ? __pfx_lock_acquire+0x10/0x10 [ 68.963966] ? __pfx_mmap_region+0x10/0x10 [ 68.964505] ? security_mmap_addr+0x7d/0xa0 [ 68.965045] ? get_unmapped_area+0x1f5/0x3f0 [ 68.965613] do_mmap+0x854/0xf00 [ 68.966094] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.966630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.967201] ksys_mmap_pgoff+0x3af/0x500 [ 68.967722] do_syscall_64+0x3f/0x90 [ 68.968209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.968871] RIP: 0033:0x7f7a077c7d82 [ 68.969335] 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 [ 68.971524] RSP: 002b:00007ffdc2c10938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.972469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a077c7d82 [ 68.973322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a06c01000 [ 68.974209] RBP: 00007f7a06c01000 R08: 0000000000000009 R09: 0000000000001000 [ 68.975065] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b997a2f70 [ 68.975918] R13: 00007ffdc2c10950 R14: 00007ffdc2c10980 R15: 00007ffdc2c10ce0 [ 68.976779] [ 68.977073] [ 68.977292] Allocated by task 220: [ 68.977759] kasan_save_stack+0x22/0x50 [ 68.978277] kasan_set_track+0x25/0x30 [ 68.978807] __kasan_slab_alloc+0x59/0x70 [ 68.979342] kmem_cache_alloc+0x16b/0x370 [ 68.979866] vm_area_dup+0x20/0x160 [ 68.980339] __split_vma+0x170/0x950 [ 68.980819] split_vma+0xc6/0x110 [ 68.981259] mprotect_fixup+0x8d2/0xb30 [ 68.981804] do_mprotect_pkey+0x87e/0xd40 [ 68.982356] __x64_sys_mprotect+0x78/0xc0 [ 68.982882] do_syscall_64+0x3f/0x90 [ 68.983370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.984015] [ 68.984235] Freed by task 220: [ 68.984638] kasan_save_stack+0x22/0x50 [ 68.985145] kasan_set_track+0x25/0x30 [ 68.985661] kasan_save_free_info+0x2b/0x50 [ 68.986331] __kasan_slab_free+0x10a/0x190 [ 68.986878] kmem_cache_free+0x10d/0x4d0 [ 68.987385] rcu_core+0x8c8/0x2860 [ 68.987825] __do_softirq+0x1b7/0x7d4 [ 68.988298] [ 68.988514] Last potentially related work creation: [ 68.989103] kasan_save_stack+0x22/0x50 [ 68.989606] __kasan_record_aux_stack+0x8e/0xa0 [ 68.990212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.990880] remove_vma+0x139/0x170 [ 68.991329] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.991882] do_vmi_munmap+0x1f1/0x2b0 [ 68.992366] __vm_munmap+0x138/0x3a0 [ 68.992830] __x64_sys_munmap+0x59/0x80 [ 68.993324] do_syscall_64+0x3f/0x90 [ 68.993832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.994496] [ 68.994709] The buggy address belongs to the object at ffff888010342910 [ 68.994709] which belongs to the cache vm_area_struct of size 168 [ 68.996166] The buggy address is located 88 bytes inside of [ 68.996166] freed 168-byte region [ffff888010342910, ffff8880103429b8) [ 68.997547] [ 68.997798] The buggy address belongs to the physical page: [ 68.998474] page:0000000041d948ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10342 [ 68.999556] memcg:ffff8880166e1401 [ 68.999988] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.000628] page_type: 0xffffffff() [ 69.001076] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.002025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166e1401 [ 69.002926] page dumped because: kasan: bad access detected [ 69.003582] [ 69.003801] Memory state around the buggy address: [ 69.004371] ffff888010342800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 69.005220] ffff888010342880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 69.006105] >ffff888010342900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.006952] ^ [ 69.007735] ffff888010342980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 69.008581] ffff888010342a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.009422] ================================================================== [ 69.010463] Disabling lock debugging due to kernel taint [ 71.330698] BUG: Bad rss-counter state mm:000000008fe581b1 type:MM_FILEPAGES val:33 [ 71.331598] BUG: Bad rss-counter state mm:000000008fe581b1 type:MM_ANONPAGES val:22 [ 71.823150] BUG: Bad rss-counter state mm:0000000077caa971 type:MM_FILEPAGES val:33 [ 71.824312] BUG: Bad rss-counter state mm:0000000077caa971 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16573' (ECDSA) to the list of known hosts. 2023/06/20 20:13:47 fuzzer started 2023/06/20 20:13:48 dialing manager at localhost:36067 2023/06/20 20:13:48 checking machine... 2023/06/20 20:13:48 checking revisions... [ 72.438449] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:13:48 testing simple program... [ 72.481438] cgroup: Unknown subsys name 'net' [ 72.521310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:13:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fed71fce20c RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800dbe7678 RSP=ffff88800dbe75f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800dbe76e8 R13=0000000000000000 R14=ffff888019dc0000 R15=ffff888013fad000 RIP=ffffffff811fc87d RFL=00000286 [--S--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 00007fed71adb900 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=00007fed72090650 CR3=000000000c4ba000 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=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 info registers vcpu 1 RAX=00007ffd446f81f4 RBX=1ffff11001b7cfbd RCX=0000000000000000 RDX=ffff888019dc0000 RSI=ffffffff836339fb RDI=ffffffff85d3d350 RBP=00007ffd446f81f4 RSP=ffff88800dbe7da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=000000000000000c R13=000000000000000c R14=ffff88800dbe7e28 R15=00007ffd446f81f8 RIP=ffffffff84501f34 RFL=00000293 [--S-A-C] 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 00007fed71adb900 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=00007fed72092618 CR3=000000000c4ba000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000