syzkaller login: [ 35.843291] BUG: Bad rss-counter state mm:000000009b301f4a type:MM_FILEPAGES val:33 [ 35.844495] BUG: Bad rss-counter state mm:000000009b301f4a type:MM_ANONPAGES val:22 [ 35.882962] ================================================================== [ 35.883883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.884997] Read of size 8 at addr ffff88800e3e05c8 by task sshd/220 [ 35.886088] [ 35.886318] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.887206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.888221] Call Trace: [ 35.888539] [ 35.888835] dump_stack_lvl+0x91/0xf0 [ 35.889326] print_report+0xcc/0x620 [ 35.889826] ? __virt_addr_valid+0x102/0x340 [ 35.890398] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.891034] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.891668] kasan_report+0xbe/0xf0 [ 35.892162] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.892807] vma_interval_tree_remove+0xc75/0xec0 [ 35.893422] vma_prepare+0xc54/0x11a0 [ 35.893912] __split_vma+0x5af/0x950 [ 35.894391] ? __pfx___split_vma+0x10/0x10 [ 35.894925] ? find_held_lock+0x2c/0x110 [ 35.895455] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.896012] ? lock_is_held_type+0x9f/0x120 [ 35.896568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.897210] ? mtree_range_walk+0x632/0x900 [ 35.897777] ? mas_walk+0x5c7/0x7c0 [ 35.898264] do_vmi_munmap+0x1f1/0x2b0 [ 35.898768] mmap_region+0x1f9/0x2660 [ 35.899263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.899786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.900511] ? __pfx_lock_acquire+0x10/0x10 [ 35.901045] ? __pfx_mmap_region+0x10/0x10 [ 35.901588] ? security_mmap_addr+0x7d/0xa0 [ 35.902128] ? get_unmapped_area+0x1f5/0x3f0 [ 35.902692] do_mmap+0x854/0xf00 [ 35.903144] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.903644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.904199] ksys_mmap_pgoff+0x3af/0x500 [ 35.904733] do_syscall_64+0x3f/0x90 [ 35.905222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.905882] RIP: 0033:0x7fab91fd0d82 [ 35.906348] 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 [ 35.908525] RSP: 002b:00007fffbc4cb948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.909470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab91fd0d82 [ 35.910339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab9140a000 [ 35.911210] RBP: 00007fab9140a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.912054] R10: 0000000000000812 R11: 0000000000000206 R12: 000056312b29dec0 [ 35.912931] R13: 00007fffbc4cb960 R14: 00007fffbc4cb990 R15: 00007fffbc4cbcf0 [ 35.913810] [ 35.914110] [ 35.914339] Allocated by task 213: [ 35.914783] kasan_save_stack+0x22/0x50 [ 35.915304] kasan_set_track+0x25/0x30 [ 35.915811] __kasan_slab_alloc+0x59/0x70 [ 35.916359] kmem_cache_alloc+0x16b/0x370 [ 35.916917] vm_area_dup+0x20/0x160 [ 35.917379] __split_vma+0x170/0x950 [ 35.917864] split_vma+0xc6/0x110 [ 35.918321] mprotect_fixup+0x8d2/0xb30 [ 35.918841] do_mprotect_pkey+0x87e/0xd40 [ 35.919379] __x64_sys_mprotect+0x78/0xc0 [ 35.919894] do_syscall_64+0x3f/0x90 [ 35.920382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.921061] [ 35.921285] Freed by task 13: [ 35.921686] kasan_save_stack+0x22/0x50 [ 35.922206] kasan_set_track+0x25/0x30 [ 35.922722] kasan_save_free_info+0x2b/0x50 [ 35.923275] __kasan_slab_free+0x10a/0x190 [ 35.923829] kmem_cache_free+0x10d/0x4d0 [ 35.924358] rcu_core+0x8c8/0x2860 [ 35.924823] __do_softirq+0x1b7/0x7d4 [ 35.925328] [ 35.925560] Last potentially related work creation: [ 35.926185] kasan_save_stack+0x22/0x50 [ 35.926720] __kasan_record_aux_stack+0x8e/0xa0 [ 35.927339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.928089] remove_vma+0x139/0x170 [ 35.928578] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.929184] do_vmi_munmap+0x1f1/0x2b0 [ 35.929701] __vm_munmap+0x138/0x3a0 [ 35.930206] __x64_sys_munmap+0x59/0x80 [ 35.930732] do_syscall_64+0x3f/0x90 [ 35.931234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.931918] [ 35.932151] Second to last potentially related work creation: [ 35.932854] kasan_save_stack+0x22/0x50 [ 35.933374] __kasan_record_aux_stack+0x8e/0xa0 [ 35.934007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.934719] remove_vma+0x139/0x170 [ 35.935216] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.935835] do_vmi_munmap+0x1f1/0x2b0 [ 35.936378] mmap_region+0x1f9/0x2660 [ 35.936924] do_mmap+0x854/0xf00 [ 35.937405] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.937947] ksys_mmap_pgoff+0x3af/0x500 [ 35.938506] do_syscall_64+0x3f/0x90 [ 35.939037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.939753] [ 35.939991] The buggy address belongs to the object at ffff88800e3e0570 [ 35.939991] which belongs to the cache vm_area_struct of size 168 [ 35.941646] The buggy address is located 88 bytes inside of [ 35.941646] freed 168-byte region [ffff88800e3e0570, ffff88800e3e0618) [ 35.943203] [ 35.943446] The buggy address belongs to the physical page: [ 35.944212] page:000000008b7f88f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e3e0658 pfn:0xe3e0 [ 35.945582] memcg:ffff88800d2b6e01 [ 35.946041] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.946800] page_type: 0xffffffff() [ 35.947300] raw: 0100000000000200 ffff88800879fc80 ffffea0000317d40 dead000000000005 [ 35.948227] raw: ffff88800e3e0658 000000008011000f 00000001ffffffff ffff88800d2b6e01 [ 35.949233] page dumped because: kasan: bad access detected [ 35.949955] [ 35.950190] Memory state around the buggy address: [ 35.950827] ffff88800e3e0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.951718] ffff88800e3e0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.952611] >ffff88800e3e0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.953558] ^ [ 35.954292] ffff88800e3e0600: fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb fb [ 35.955238] ffff88800e3e0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.956189] ================================================================== [ 35.957231] Disabling lock debugging due to kernel taint [ 38.081737] BUG: Bad rss-counter state mm:0000000097ae921a type:MM_FILEPAGES val:33 [ 38.082735] BUG: Bad rss-counter state mm:0000000097ae921a type:MM_ANONPAGES val:22 [ 38.561363] BUG: Bad rss-counter state mm:00000000688376e9 type:MM_FILEPAGES val:33 [ 38.562462] BUG: Bad rss-counter state mm:00000000688376e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34074' (ECDSA) to the list of known hosts. 2023/06/19 16:34:24 fuzzer started 2023/06/19 16:34:24 dialing manager at localhost:44161 2023/06/19 16:34:24 checking machine... 2023/06/19 16:34:24 checking revisions... [ 39.319472] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:34:24 testing simple program... [ 39.370336] cgroup: Unknown subsys name 'net' [ 39.421915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:34:19 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11002c93fac RCX=0000000000000000 RDX=0000000000001255 RSI=00007f76a3820618 RDI=ffff888019cf6ae0 RBP=ffff888019cf6ae0 RSP=ffff88801649fd38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f76a3820618 R13=dffffc0000000000 R14=0000000000001255 R15=0000000000000040 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f76a3269900 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=00007f76a3820618 CR3=000000000f1b2000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f568cf5b000 CR3=000000000f372000 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=a3567dc39d154f98b84a9c4b63b7a852 XMM02=2c67c8bc2e329bc3000000000011f4a0 XMM03=fb795ef6d65770560000000000123df0 XMM04=9d356a66a2333e9800000000000ae988 XMM05=19e9129bd510f2350000000000134ce8 XMM06=3e4f2dcc8489c49a0000000000133b50 XMM07=e042d86d42eb936e0000000000124070 XMM08=79915f53a76e8185000000000011f500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000