syzkaller login: [ 35.213235] BUG: Bad rss-counter state mm:00000000a83afbeb type:MM_FILEPAGES val:33 [ 35.213973] BUG: Bad rss-counter state mm:00000000a83afbeb type:MM_ANONPAGES val:22 [ 35.411292] ================================================================== [ 35.411871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.412494] Read of size 8 at addr ffff888015805df0 by task sshd/221 [ 35.413036] [ 35.413181] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.413736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.414354] Call Trace: [ 35.414563] [ 35.414750] dump_stack_lvl+0x91/0xf0 [ 35.415075] print_report+0xcc/0x620 [ 35.415393] ? __virt_addr_valid+0x102/0x340 [ 35.415752] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.416151] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.416549] kasan_report+0xbe/0xf0 [ 35.416892] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.417295] vma_interval_tree_remove+0xc75/0xec0 [ 35.417685] vma_prepare+0xc54/0x11a0 [ 35.417999] __split_vma+0x5af/0x950 [ 35.418315] ? __pfx___split_vma+0x10/0x10 [ 35.418660] ? find_held_lock+0x2c/0x110 [ 35.419004] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.419374] ? lock_is_held_type+0x9f/0x120 [ 35.419731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.420124] ? mtree_range_walk+0x632/0x900 [ 35.420486] ? mas_walk+0x5c7/0x7c0 [ 35.420818] do_vmi_munmap+0x1f1/0x2b0 [ 35.421129] mmap_region+0x1f9/0x2660 [ 35.421441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.421773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.422234] ? __pfx_lock_acquire+0x10/0x10 [ 35.422577] ? __pfx_mmap_region+0x10/0x10 [ 35.422919] ? security_mmap_addr+0x7d/0xa0 [ 35.423267] ? get_unmapped_area+0x1f5/0x3f0 [ 35.423624] do_mmap+0x854/0xf00 [ 35.423910] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.424235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.424600] ksys_mmap_pgoff+0x3af/0x500 [ 35.424967] do_syscall_64+0x3f/0x90 [ 35.425283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.425705] RIP: 0033:0x7f6a9b386d82 [ 35.426004] 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 [ 35.427349] RSP: 002b:00007fff622c8a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.427931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a9b386d82 [ 35.428470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a9a7c0000 [ 35.429039] RBP: 00007f6a9a7c0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.429580] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564e9399b20 [ 35.430120] R13: 00007fff622c8a20 R14: 00007fff622c8a50 R15: 00007fff622c8db0 [ 35.430674] [ 35.430865] [ 35.431007] Allocated by task 212: [ 35.431285] kasan_save_stack+0x22/0x50 [ 35.431612] kasan_set_track+0x25/0x30 [ 35.431932] __kasan_slab_alloc+0x59/0x70 [ 35.432300] kmem_cache_alloc+0x16b/0x370 [ 35.432641] vm_area_dup+0x20/0x160 [ 35.432977] __split_vma+0x170/0x950 [ 35.433292] split_vma+0xc6/0x110 [ 35.433615] mprotect_fixup+0x8d2/0xb30 [ 35.433944] do_mprotect_pkey+0x87e/0xd40 [ 35.434290] __x64_sys_mprotect+0x78/0xc0 [ 35.434634] do_syscall_64+0x3f/0x90 [ 35.434943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.435362] [ 35.435507] Freed by task 209: [ 35.435763] kasan_save_stack+0x22/0x50 [ 35.436096] kasan_set_track+0x25/0x30 [ 35.436419] kasan_save_free_info+0x2b/0x50 [ 35.436936] __kasan_slab_free+0x10a/0x190 [ 35.437282] kmem_cache_free+0x10d/0x4d0 [ 35.437607] rcu_core+0x8c8/0x2860 [ 35.437896] __do_softirq+0x1b7/0x7d4 [ 35.438208] [ 35.438351] Last potentially related work creation: [ 35.438725] kasan_save_stack+0x22/0x50 [ 35.439033] __kasan_record_aux_stack+0x8e/0xa0 [ 35.439372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.439781] remove_vma+0x139/0x170 [ 35.440076] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.440446] do_vmi_munmap+0x1f1/0x2b0 [ 35.440781] __vm_munmap+0x138/0x3a0 [ 35.441093] __x64_sys_munmap+0x59/0x80 [ 35.441419] do_syscall_64+0x3f/0x90 [ 35.441726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.442142] [ 35.442284] The buggy address belongs to the object at ffff888015805d98 [ 35.442284] which belongs to the cache vm_area_struct of size 168 [ 35.443220] The buggy address is located 88 bytes inside of [ 35.443220] freed 168-byte region [ffff888015805d98, ffff888015805e40) [ 35.444126] [ 35.444273] The buggy address belongs to the physical page: [ 35.444726] page:00000000c57dc118 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15805 [ 35.445493] memcg:ffff888015804101 [ 35.445768] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.446181] page_type: 0xffffffff() [ 35.446473] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f5900 000000000000000a [ 35.447059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015804101 [ 35.447635] page dumped because: kasan: bad access detected [ 35.448059] [ 35.448200] Memory state around the buggy address: [ 35.448549] ffff888015805c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.449077] ffff888015805d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.449638] >ffff888015805d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.450177] ^ [ 35.450740] ffff888015805e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.451288] ffff888015805e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.451836] ================================================================== [ 35.452478] Disabling lock debugging due to kernel taint [ 42.123005] BUG: Bad rss-counter state mm:00000000f33d80ae type:MM_FILEPAGES val:33 [ 42.123747] BUG: Bad rss-counter state mm:00000000f33d80ae type:MM_ANONPAGES val:22 [ 43.338442] BUG: Bad rss-counter state mm:00000000e3b8d4ca type:MM_FILEPAGES val:33 [ 43.339076] BUG: Bad rss-counter state mm:00000000e3b8d4ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36612' (ECDSA) to the list of known hosts. 2023/06/21 08:06:29 fuzzer started 2023/06/21 08:06:29 dialing manager at localhost:36067 2023/06/21 08:06:29 checking machine... 2023/06/21 08:06:29 checking revisions... 2023/06/21 08:06:29 testing simple program... [ 44.247266] kmemleak: Automatic memory scanning thread ended [ 44.318522] cgroup: Unknown subsys name 'net' [ 44.413183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:06:29 Registers: info registers vcpu 0 RAX=ffff88806ce2ba18 RBX=0000000a11207785 RCX=0000000000000100 RDX=ffff888008d90000 RSI=ffffffff813bffdf RDI=ffff88806ce2ba28 RBP=dffffc0000000000 RSP=ffff88806ce09e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000007 R11=ffff88806ce09ff8 R12=0000000000000046 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff813c0002 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 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=000055fff7d2a468 CR3=000000000df26000 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=2038323a36303a3830203132206e754a XMM01=5d3637303933332e33342020205b203a XMM02=415f4d4d3a6570797420616334643862 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a36303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f52f70954bb RCX=ffffffff864bbb54 RDX=1ffff110031fdedf RSI=0000000000000000 RDI=00007f52f70954bb RBP=00007f52f70954bb RSP=ffff888018fef620 R8 =ffffffff864bbb58 R9 =ffff888018fef6e0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888018fef768 R13=0000000000000000 R14=ffff888015943680 R15=ffff88800960f130 RIP=ffffffff814c086b RFL=00000207 [-----PC] 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 00007f52f6bd6900 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=00007f8e37410ff0 CR3=000000000ea2e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000