syzkaller login: [ 38.674324] BUG: Bad rss-counter state mm:000000009892edd3 type:MM_FILEPAGES val:33 [ 38.675705] BUG: Bad rss-counter state mm:000000009892edd3 type:MM_ANONPAGES val:22 [ 38.823518] ================================================================== [ 38.824648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.825915] Read of size 8 at addr ffff88800d55f228 by task sshd/220 [ 38.826819] [ 38.827078] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.828123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.829114] Call Trace: [ 38.829429] [ 38.829729] dump_stack_lvl+0x91/0xf0 [ 38.830217] print_report+0xcc/0x620 [ 38.830704] ? __virt_addr_valid+0x102/0x340 [ 38.831249] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831865] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832520] kasan_report+0xbe/0xf0 [ 38.833108] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833839] vma_interval_tree_remove+0xc75/0xec0 [ 38.834445] vma_prepare+0xc54/0x11a0 [ 38.834920] __split_vma+0x5af/0x950 [ 38.835393] ? __pfx___split_vma+0x10/0x10 [ 38.835931] ? find_held_lock+0x2c/0x110 [ 38.836449] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.837017] ? lock_is_held_type+0x9f/0x120 [ 38.837554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.838161] ? mtree_range_walk+0x632/0x900 [ 38.838709] ? mas_walk+0x5c7/0x7c0 [ 38.839184] do_vmi_munmap+0x1f1/0x2b0 [ 38.839691] mmap_region+0x1f9/0x2660 [ 38.840175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.840682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.841389] ? __pfx_lock_acquire+0x10/0x10 [ 38.841920] ? __pfx_mmap_region+0x10/0x10 [ 38.842449] ? security_mmap_addr+0x7d/0xa0 [ 38.842976] ? get_unmapped_area+0x1f5/0x3f0 [ 38.843526] do_mmap+0x854/0xf00 [ 38.843984] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.844484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.845045] ksys_mmap_pgoff+0x3af/0x500 [ 38.845556] do_syscall_64+0x3f/0x90 [ 38.846039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.846691] RIP: 0033:0x7f9ffd2a8d82 [ 38.847146] 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 [ 38.849289] RSP: 002b:00007ffca284dcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.850190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ffd2a8d82 [ 38.851036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ffc6e2000 [ 38.851904] RBP: 00007f9ffc6e2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.852751] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7bd0b2d90 [ 38.853596] R13: 00007ffca284dcf0 R14: 00007ffca284dd20 R15: 00007ffca284e080 [ 38.854454] [ 38.854747] [ 38.854963] Allocated by task 213: [ 38.855394] kasan_save_stack+0x22/0x50 [ 38.855911] kasan_set_track+0x25/0x30 [ 38.856400] __kasan_slab_alloc+0x59/0x70 [ 38.856917] kmem_cache_alloc+0x16b/0x370 [ 38.857427] vm_area_dup+0x20/0x160 [ 38.857879] __split_vma+0x170/0x950 [ 38.858343] split_vma+0xc6/0x110 [ 38.858777] mprotect_fixup+0x8d2/0xb30 [ 38.859280] do_mprotect_pkey+0x87e/0xd40 [ 38.859803] __x64_sys_mprotect+0x78/0xc0 [ 38.860322] do_syscall_64+0x3f/0x90 [ 38.860795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.861433] [ 38.861646] Freed by task 204: [ 38.862038] kasan_save_stack+0x22/0x50 [ 38.862535] kasan_set_track+0x25/0x30 [ 38.863025] kasan_save_free_info+0x2b/0x50 [ 38.863555] __kasan_slab_free+0x10a/0x190 [ 38.864108] kmem_cache_free+0x10d/0x4d0 [ 38.864609] rcu_core+0x8c8/0x2860 [ 38.865053] __do_softirq+0x1b7/0x7d4 [ 38.865527] [ 38.865739] Last potentially related work creation: [ 38.866451] kasan_save_stack+0x22/0x50 [ 38.866949] __kasan_record_aux_stack+0x8e/0xa0 [ 38.867522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.868181] remove_vma+0x139/0x170 [ 38.868642] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.869200] do_vmi_munmap+0x1f1/0x2b0 [ 38.869683] __vm_munmap+0x138/0x3a0 [ 38.870149] __x64_sys_munmap+0x59/0x80 [ 38.870645] do_syscall_64+0x3f/0x90 [ 38.871125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871774] [ 38.871989] Second to last potentially related work creation: [ 38.872669] kasan_save_stack+0x22/0x50 [ 38.873174] __kasan_record_aux_stack+0x8e/0xa0 [ 38.873744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.874385] remove_vma+0x139/0x170 [ 38.874834] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.875387] do_vmi_munmap+0x1f1/0x2b0 [ 38.875891] mmap_region+0x1f9/0x2660 [ 38.876366] do_mmap+0x854/0xf00 [ 38.876794] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.877278] ksys_mmap_pgoff+0x3af/0x500 [ 38.877775] do_syscall_64+0x3f/0x90 [ 38.878250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878900] [ 38.879115] The buggy address belongs to the object at ffff88800d55f1d0 [ 38.879115] which belongs to the cache vm_area_struct of size 168 [ 38.880569] The buggy address is located 88 bytes inside of [ 38.880569] freed 168-byte region [ffff88800d55f1d0, ffff88800d55f278) [ 38.881960] [ 38.882176] The buggy address belongs to the physical page: [ 38.882827] page:00000000437530c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd55f [ 38.883922] memcg:ffff88800d5cf801 [ 38.884348] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.885045] page_type: 0xffffffff() [ 38.885532] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0ac0 dead000000000005 [ 38.886500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5cf801 [ 38.887345] page dumped because: kasan: bad access detected [ 38.887970] [ 38.888176] Memory state around the buggy address: [ 38.888744] ffff88800d55f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.889567] ffff88800d55f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.890411] >ffff88800d55f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.891254] ^ [ 38.891805] ffff88800d55f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.892638] ffff88800d55f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.893470] ================================================================== [ 38.894410] Disabling lock debugging due to kernel taint [ 41.414177] BUG: Bad rss-counter state mm:0000000085d71662 type:MM_FILEPAGES val:33 [ 41.415196] BUG: Bad rss-counter state mm:0000000085d71662 type:MM_ANONPAGES val:22 [ 42.000058] BUG: Bad rss-counter state mm:000000005f8b994b type:MM_FILEPAGES val:33 [ 42.001213] BUG: Bad rss-counter state mm:000000005f8b994b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50462' (ECDSA) to the list of known hosts. 2023/06/20 23:10:00 fuzzer started 2023/06/20 23:10:01 dialing manager at localhost:36067 2023/06/20 23:10:01 checking machine... 2023/06/20 23:10:01 checking revisions... [ 42.743481] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:01 testing simple program... [ 42.798037] cgroup: Unknown subsys name 'net' [ 42.852048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002db0e5d RSI=ffffffff83872833 RDI=ffff888016d87290 RBP=ffff888016d872e8 RSP=ffff888016d87220 R8 =0000000000000001 R9 =ffff888016d872d0 R10=0000000000038001 R11=0000000000091bc9 R12=ffff888016d87358 R13=0000000000000000 R14=ffff88801593b680 R15=ffff888016d87290 RIP=ffffffff8113062c 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 00007fce2cf3d900 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=00007fce2d4f4618 CR3=0000000010352000 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=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e134f RSI=ffff888008e07f48 RDI=ffff88806cf09a78 RBP=ffff888008e07f48 RSP=ffff88806cf099c8 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000506a R12=0000000000000008 R13=ffff88806cf09ab8 R14=ffff888008e07f48 R15=ffff88806cf09a70 RIP=ffffffff81130445 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 0000000000000000 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=00007fa6956e14e0 CR3=000000000c5a0000 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=14f96d5767738b805842991c035d10bc XMM02=000000000011b060ec2efd57dc4c00df XMM03=0000000000121a00e948bbe63dfce51f XMM04=8e635392fb59863000000000000ae988 XMM05=e4cb8bb95a7664b60000000000133378 XMM06=c291bd5c70af25b90000000000133200 XMM07=e042d86d42eb936e0000000000121cd8 XMM08=e948bbe63dfce51f000000000011b0c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000