syzkaller login: [ 30.445882] BUG: Bad rss-counter state mm:0000000073b794e3 type:MM_FILEPAGES val:33 [ 30.447335] BUG: Bad rss-counter state mm:0000000073b794e3 type:MM_ANONPAGES val:22 [ 30.609035] ================================================================== [ 30.609947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.610871] Read of size 8 at addr ffff888016770228 by task sshd/221 [ 30.611735] [ 30.611951] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.612802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.613784] Call Trace: [ 30.614103] [ 30.614388] dump_stack_lvl+0x91/0xf0 [ 30.614899] print_report+0xcc/0x620 [ 30.615381] ? __virt_addr_valid+0x102/0x340 [ 30.615927] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.616544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617153] kasan_report+0xbe/0xf0 [ 30.617627] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618243] vma_interval_tree_remove+0xc75/0xec0 [ 30.618842] vma_prepare+0xc54/0x11a0 [ 30.619339] __split_vma+0x5af/0x950 [ 30.619809] ? __pfx___split_vma+0x10/0x10 [ 30.620328] ? find_held_lock+0x2c/0x110 [ 30.620849] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.621409] ? lock_is_held_type+0x9f/0x120 [ 30.621946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.622544] ? mtree_range_walk+0x632/0x900 [ 30.623124] ? mas_walk+0x5c7/0x7c0 [ 30.623602] do_vmi_munmap+0x1f1/0x2b0 [ 30.624093] mmap_region+0x1f9/0x2660 [ 30.624574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.625090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.625793] ? __pfx_lock_acquire+0x10/0x10 [ 30.626329] ? __pfx_mmap_region+0x10/0x10 [ 30.626893] ? security_mmap_addr+0x7d/0xa0 [ 30.627423] ? get_unmapped_area+0x1f5/0x3f0 [ 30.627981] do_mmap+0x854/0xf00 [ 30.628422] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.628928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.629488] ksys_mmap_pgoff+0x3af/0x500 [ 30.630005] do_syscall_64+0x3f/0x90 [ 30.630492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.631147] RIP: 0033:0x7f646d81ed82 [ 30.631602] 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 [ 30.633772] RSP: 002b:00007ffef202ba28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.634680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f646d81ed82 [ 30.635563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f646cc58000 [ 30.636429] RBP: 00007f646cc58000 R08: 0000000000000009 R09: 0000000000001000 [ 30.637292] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b546e2d90 [ 30.638164] R13: 00007ffef202ba40 R14: 00007ffef202ba70 R15: 00007ffef202bdd0 [ 30.639049] [ 30.639348] [ 30.639567] Allocated by task 214: [ 30.639999] kasan_save_stack+0x22/0x50 [ 30.640490] kasan_set_track+0x25/0x30 [ 30.640984] __kasan_slab_alloc+0x59/0x70 [ 30.641499] kmem_cache_alloc+0x16b/0x370 [ 30.642004] vm_area_dup+0x20/0x160 [ 30.642457] __split_vma+0x170/0x950 [ 30.642936] split_vma+0xc6/0x110 [ 30.643366] mprotect_fixup+0x8d2/0xb30 [ 30.643865] do_mprotect_pkey+0x87e/0xd40 [ 30.644370] __x64_sys_mprotect+0x78/0xc0 [ 30.644881] do_syscall_64+0x3f/0x90 [ 30.645353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645983] [ 30.646191] Freed by task 211: [ 30.646567] kasan_save_stack+0x22/0x50 [ 30.647102] kasan_set_track+0x25/0x30 [ 30.647594] kasan_save_free_info+0x2b/0x50 [ 30.648113] __kasan_slab_free+0x10a/0x190 [ 30.648633] kmem_cache_free+0x10d/0x4d0 [ 30.649137] rcu_core+0x8c8/0x2860 [ 30.649576] __do_softirq+0x1b7/0x7d4 [ 30.650041] [ 30.650252] Last potentially related work creation: [ 30.650822] kasan_save_stack+0x22/0x50 [ 30.651326] __kasan_record_aux_stack+0x8e/0xa0 [ 30.651892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.652527] remove_vma+0x139/0x170 [ 30.652976] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.653517] do_vmi_munmap+0x1f1/0x2b0 [ 30.653993] __vm_munmap+0x138/0x3a0 [ 30.654456] __x64_sys_munmap+0x59/0x80 [ 30.654974] do_syscall_64+0x3f/0x90 [ 30.655442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656076] [ 30.656283] The buggy address belongs to the object at ffff8880167701d0 [ 30.656283] which belongs to the cache vm_area_struct of size 168 [ 30.657713] The buggy address is located 88 bytes inside of [ 30.657713] freed 168-byte region [ffff8880167701d0, ffff888016770278) [ 30.659084] [ 30.659302] The buggy address belongs to the physical page: [ 30.659924] page:000000003f17afe5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16770 [ 30.660950] memcg:ffff88800f02a701 [ 30.661351] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.661960] page_type: 0xffffffff() [ 30.662384] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.663265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f02a701 [ 30.664117] page dumped because: kasan: bad access detected [ 30.664735] [ 30.664941] Memory state around the buggy address: [ 30.665485] ffff888016770100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.666286] ffff888016770180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.667101] >ffff888016770200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.667902] ^ [ 30.668420] ffff888016770280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.669221] ffff888016770300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.670019] ================================================================== [ 30.671046] Disabling lock debugging due to kernel taint [ 32.680659] BUG: Bad rss-counter state mm:000000000541e2ce type:MM_FILEPAGES val:33 [ 32.681789] BUG: Bad rss-counter state mm:000000000541e2ce type:MM_ANONPAGES val:22 [ 33.066106] BUG: Bad rss-counter state mm:000000002452c0cf type:MM_FILEPAGES val:33 [ 33.067130] BUG: Bad rss-counter state mm:000000002452c0cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35360' (ECDSA) to the list of known hosts. 2023/06/21 07:38:31 fuzzer started 2023/06/21 07:38:32 dialing manager at localhost:36067 2023/06/21 07:38:32 checking machine... 2023/06/21 07:38:32 checking revisions... [ 33.784540] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:38:32 testing simple program... [ 33.837771] cgroup: Unknown subsys name 'net' [ 33.895648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:38:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fcb38115a40 CR3=000000000e506000 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=14f97437d2bd9d84ad45f704f3d30632 XMM02=000000000011f4e0eff9b2d0a8fce9cb XMM03=000000000011f5b02c67c8bc2e329bc3 XMM04=5ba3bf818dc1f4a500000000000ae988 XMM05=e4cb8bb95a7664b60000000000132588 XMM06=c291bd5c70af25b90000000000132410 XMM07=e042d86d42eb936e0000000000122938 XMM08=46733c57a4224559000000000011f5b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff86211672 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86211676 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000044edf R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801868f7c8 R15=ffff88806cf09a98 RIP=ffffffff81130baa 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 00007fe9fa871900 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=00007ffe2f1e7000 CR3=000000000dd58000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000