syzkaller login: [ 34.296670] BUG: Bad rss-counter state mm:0000000051631637 type:MM_FILEPAGES val:33 [ 34.297845] BUG: Bad rss-counter state mm:0000000051631637 type:MM_ANONPAGES val:22 [ 34.338220] ================================================================== [ 34.339255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.340324] Read of size 8 at addr ffff88801a1cca50 by task sshd/219 [ 34.341327] [ 34.341580] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.342483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.343653] Call Trace: [ 34.343976] [ 34.344258] dump_stack_lvl+0x91/0xf0 [ 34.344742] print_report+0xcc/0x620 [ 34.345236] ? __virt_addr_valid+0x102/0x340 [ 34.345983] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.346607] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.347405] kasan_report+0xbe/0xf0 [ 34.348037] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.348724] vma_interval_tree_remove+0xc75/0xec0 [ 34.349379] vma_prepare+0xc54/0x11a0 [ 34.349879] __split_vma+0x5af/0x950 [ 34.350446] ? __pfx___split_vma+0x10/0x10 [ 34.351156] ? find_held_lock+0x2c/0x110 [ 34.351841] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.352436] ? lock_is_held_type+0x9f/0x120 [ 34.353009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.353644] ? mtree_range_walk+0x632/0x900 [ 34.354237] ? mas_walk+0x5c7/0x7c0 [ 34.354746] do_vmi_munmap+0x1f1/0x2b0 [ 34.355263] mmap_region+0x1f9/0x2660 [ 34.355766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.356308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.357061] ? __pfx_lock_acquire+0x10/0x10 [ 34.357614] ? __pfx_mmap_region+0x10/0x10 [ 34.358172] ? security_mmap_addr+0x7d/0xa0 [ 34.358735] ? get_unmapped_area+0x1f5/0x3f0 [ 34.359314] do_mmap+0x854/0xf00 [ 34.359785] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.360307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.360895] ksys_mmap_pgoff+0x3af/0x500 [ 34.361443] do_syscall_64+0x3f/0x90 [ 34.361966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.362654] RIP: 0033:0x7f0a232ded82 [ 34.363129] 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 [ 34.365386] RSP: 002b:00007ffd33956628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.366342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a232ded82 [ 34.367257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a22718000 [ 34.368158] RBP: 00007f0a22718000 R08: 0000000000000009 R09: 0000000000001000 [ 34.369053] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564578f60ec0 [ 34.369981] R13: 00007ffd33956640 R14: 00007ffd33956670 R15: 00007ffd339569d0 [ 34.370891] [ 34.371193] [ 34.371416] Allocated by task 212: [ 34.371857] kasan_save_stack+0x22/0x50 [ 34.372392] kasan_set_track+0x25/0x30 [ 34.372907] __kasan_slab_alloc+0x59/0x70 [ 34.373461] kmem_cache_alloc+0x16b/0x370 [ 34.374020] vm_area_dup+0x20/0x160 [ 34.374501] __split_vma+0x170/0x950 [ 34.374995] split_vma+0xc6/0x110 [ 34.375454] mprotect_fixup+0x8d2/0xb30 [ 34.375994] do_mprotect_pkey+0x87e/0xd40 [ 34.376545] __x64_sys_mprotect+0x78/0xc0 [ 34.377095] do_syscall_64+0x3f/0x90 [ 34.377589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.378284] [ 34.378512] Freed by task 212: [ 34.378988] kasan_save_stack+0x22/0x50 [ 34.379551] kasan_set_track+0x25/0x30 [ 34.380080] kasan_save_free_info+0x2b/0x50 [ 34.380647] __kasan_slab_free+0x10a/0x190 [ 34.381207] kmem_cache_free+0x10d/0x4d0 [ 34.381740] rcu_core+0x8c8/0x2860 [ 34.382221] __do_softirq+0x1b7/0x7d4 [ 34.382723] [ 34.382948] Last potentially related work creation: [ 34.383565] kasan_save_stack+0x22/0x50 [ 34.384095] __kasan_record_aux_stack+0x8e/0xa0 [ 34.384713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.385387] remove_vma+0x139/0x170 [ 34.385870] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.386471] do_vmi_munmap+0x1f1/0x2b0 [ 34.386985] __vm_munmap+0x138/0x3a0 [ 34.387474] __x64_sys_munmap+0x59/0x80 [ 34.387993] do_syscall_64+0x3f/0x90 [ 34.388495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.389182] [ 34.389408] The buggy address belongs to the object at ffff88801a1cc9f8 [ 34.389408] which belongs to the cache vm_area_struct of size 168 [ 34.390998] The buggy address is located 88 bytes inside of [ 34.390998] freed 168-byte region [ffff88801a1cc9f8, ffff88801a1ccaa0) [ 34.392505] [ 34.392733] The buggy address belongs to the physical page: [ 34.393442] page:00000000352fbd87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1cc [ 34.394594] memcg:ffff888018e18601 [ 34.395051] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.395742] page_type: 0xffffffff() [ 34.396222] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.397190] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e18601 [ 34.398174] page dumped because: kasan: bad access detected [ 34.398874] [ 34.399100] Memory state around the buggy address: [ 34.399697] ffff88801a1cc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.400602] ffff88801a1cc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.401526] >ffff88801a1cca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.402445] ^ [ 34.403193] ffff88801a1cca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.404089] ffff88801a1ccb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.404997] ================================================================== [ 34.405984] Disabling lock debugging due to kernel taint [ 37.215484] BUG: Bad rss-counter state mm:00000000e9c9cdb4 type:MM_FILEPAGES val:33 [ 37.216470] BUG: Bad rss-counter state mm:00000000e9c9cdb4 type:MM_ANONPAGES val:22 [ 37.598708] BUG: Bad rss-counter state mm:0000000000be0abc type:MM_FILEPAGES val:33 [ 37.599920] BUG: Bad rss-counter state mm:0000000000be0abc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10655' (ECDSA) to the list of known hosts. 2023/06/20 07:54:33 fuzzer started 2023/06/20 07:54:33 dialing manager at localhost:44161 2023/06/20 07:54:33 checking machine... 2023/06/20 07:54:33 checking revisions... [ 38.331662] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:54:33 testing simple program... [ 38.383171] cgroup: Unknown subsys name 'net' [ 38.420228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff836517c5 RDX=ffff888014748000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888014748000 RSP=ffff888017dbfd28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff87f9478c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff814c0245 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 00007f3e1c9c3900 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=00007f3e1cf7a618 CR3=000000000fd26000 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=2033333a34353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86137009 RBX=0000000000000002 RCX=ffffffff86137004 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c26e01 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137008 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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=00007f6bdc040000 CR3=000000000c6bc000 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=758ca0052f1666a03e43809972ff51bd XMM02=2c67c8bc2e329bc3000000000011c948 XMM03=fb795ef6d65770560000000000123de8 XMM04=0aa4f143aeaefb8d00000000000ae988 XMM05=cc7f7f3b4463453700000000001347d8 XMM06=806171799158d9670000000000133878 XMM07=e042d86d42eb936e0000000000124068 XMM08=5ab5c127c1d3b0bf000000000011c9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000