syzkaller login: [ 35.259858] BUG: Bad rss-counter state mm:00000000bfd9e368 type:MM_FILEPAGES val:33 [ 35.261386] BUG: Bad rss-counter state mm:00000000bfd9e368 type:MM_ANONPAGES val:22 [ 35.418882] ================================================================== [ 35.419805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.420755] Read of size 8 at addr ffff88801a0716b0 by task sshd/219 [ 35.421532] [ 35.421754] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.422730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.423729] Call Trace: [ 35.424051] [ 35.424349] dump_stack_lvl+0x91/0xf0 [ 35.424849] print_report+0xcc/0x620 [ 35.425335] ? __virt_addr_valid+0x102/0x340 [ 35.425889] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.426513] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.427133] kasan_report+0xbe/0xf0 [ 35.427610] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.428246] vma_interval_tree_remove+0xc75/0xec0 [ 35.428851] vma_prepare+0xc54/0x11a0 [ 35.429343] __split_vma+0x5af/0x950 [ 35.429853] ? __pfx___split_vma+0x10/0x10 [ 35.430437] ? find_held_lock+0x2c/0x110 [ 35.431035] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.431648] ? lock_is_held_type+0x9f/0x120 [ 35.432236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.432892] ? mtree_range_walk+0x632/0x900 [ 35.433498] ? mas_walk+0x5c7/0x7c0 [ 35.434010] do_vmi_munmap+0x1f1/0x2b0 [ 35.434552] mmap_region+0x1f9/0x2660 [ 35.435095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.435656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.436429] ? __pfx_lock_acquire+0x10/0x10 [ 35.437016] ? __pfx_mmap_region+0x10/0x10 [ 35.437591] ? security_mmap_addr+0x7d/0xa0 [ 35.438170] ? get_unmapped_area+0x1f5/0x3f0 [ 35.438784] do_mmap+0x854/0xf00 [ 35.439280] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.439824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.440438] ksys_mmap_pgoff+0x3af/0x500 [ 35.440987] do_syscall_64+0x3f/0x90 [ 35.441508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.442220] RIP: 0033:0x7f4385e8ad82 [ 35.442710] 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 [ 35.445066] RSP: 002b:00007fff75994a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.446058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4385e8ad82 [ 35.447025] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43852c4000 [ 35.447952] RBP: 00007f43852c4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.448878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de3a81dec0 [ 35.449801] R13: 00007fff75994a60 R14: 00007fff75994a90 R15: 00007fff75994df0 [ 35.450726] [ 35.451057] [ 35.451288] Allocated by task 212: [ 35.451753] kasan_save_stack+0x22/0x50 [ 35.452297] kasan_set_track+0x25/0x30 [ 35.452838] __kasan_slab_alloc+0x59/0x70 [ 35.453418] kmem_cache_alloc+0x16b/0x370 [ 35.453977] vm_area_dup+0x20/0x160 [ 35.454472] __split_vma+0x170/0x950 [ 35.454997] split_vma+0xc6/0x110 [ 35.455476] mprotect_fixup+0x8d2/0xb30 [ 35.456020] do_mprotect_pkey+0x87e/0xd40 [ 35.456580] __x64_sys_mprotect+0x78/0xc0 [ 35.457147] do_syscall_64+0x3f/0x90 [ 35.457654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.458333] [ 35.458566] Freed by task 212: [ 35.459000] kasan_save_stack+0x22/0x50 [ 35.459533] kasan_set_track+0x25/0x30 [ 35.460064] kasan_save_free_info+0x2b/0x50 [ 35.460629] __kasan_slab_free+0x10a/0x190 [ 35.461192] kmem_cache_free+0x10d/0x4d0 [ 35.461739] rcu_core+0x8c8/0x2860 [ 35.462212] __do_softirq+0x1b7/0x7d4 [ 35.462723] [ 35.462964] Last potentially related work creation: [ 35.463589] kasan_save_stack+0x22/0x50 [ 35.464127] __kasan_record_aux_stack+0x8e/0xa0 [ 35.464740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.465412] remove_vma+0x139/0x170 [ 35.465899] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.466491] do_vmi_munmap+0x1f1/0x2b0 [ 35.467026] __vm_munmap+0x138/0x3a0 [ 35.467525] __x64_sys_munmap+0x59/0x80 [ 35.468060] do_syscall_64+0x3f/0x90 [ 35.468562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.469246] [ 35.469483] The buggy address belongs to the object at ffff88801a071658 [ 35.469483] which belongs to the cache vm_area_struct of size 168 [ 35.471074] The buggy address is located 88 bytes inside of [ 35.471074] freed 168-byte region [ffff88801a071658, ffff88801a071700) [ 35.472577] [ 35.472806] The buggy address belongs to the physical page: [ 35.473509] page:000000000a434db8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a071 [ 35.474676] memcg:ffff888019f7ae01 [ 35.475155] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.475843] page_type: 0xffffffff() [ 35.476330] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.477305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f7ae01 [ 35.478283] page dumped because: kasan: bad access detected [ 35.479010] [ 35.479245] Memory state around the buggy address: [ 35.479858] ffff88801a071580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.480780] ffff88801a071600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.481712] >ffff88801a071680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.482625] ^ [ 35.483273] ffff88801a071700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.484187] ffff88801a071780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.485104] ================================================================== [ 35.486325] Disabling lock debugging due to kernel taint [ 37.299801] BUG: Bad rss-counter state mm:0000000055cd5ba8 type:MM_FILEPAGES val:33 [ 37.300902] BUG: Bad rss-counter state mm:0000000055cd5ba8 type:MM_ANONPAGES val:22 [ 37.692529] BUG: Bad rss-counter state mm:0000000055d0fae3 type:MM_FILEPAGES val:33 [ 37.693548] BUG: Bad rss-counter state mm:0000000055d0fae3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35144' (ECDSA) to the list of known hosts. 2023/06/19 12:27:13 fuzzer started 2023/06/19 12:27:13 dialing manager at localhost:44161 2023/06/19 12:27:13 checking machine... 2023/06/19 12:27:13 checking revisions... [ 38.366267] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:27:13 testing simple program... [ 38.403854] cgroup: Unknown subsys name 'net' [ 38.453126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:09 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007f06ccd13163 RCX=ffffffff813a0a8d RDX=ffff888018d851c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff8880141f7260 R8 =0000000000000006 R9 =00007f06ccd13163 R10=ffffffffffffffff R11=00000000000b6996 R12=ffff8880141f73a0 R13=0000000000000000 R14=ffff888018d851c0 R15=00000000000928c0 RIP=ffffffff814c01e1 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 00007f06cc820900 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=00007f06ccdd7618 CR3=000000000fd40000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=000000001bf48a52 RCX=0000000000000000 RDX=ffff8880159a1b40 RSI=ffffffff81b2afa9 RDI=0000000000000005 RBP=ffff888019b35bd8 RSP=ffff888019c8f848 R8 =0000000000000005 R9 =0000000000000093 R10=00000000000000a0 R11=00000000000b6996 R12=ffff888017f28d00 R13=00000000000000a0 R14=ffff888019b35978 R15=0000000000000000 RIP=ffffffff81b2afa9 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 00007efc7531d700 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=00007fd52d297000 CR3=0000000019f88000 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=2032313a37323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000