syzkaller login: [ 38.825064] BUG: Bad rss-counter state mm:0000000002f31b0d type:MM_FILEPAGES val:33 [ 38.825629] BUG: Bad rss-counter state mm:0000000002f31b0d type:MM_ANONPAGES val:22 [ 38.857471] ================================================================== [ 38.857939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.858429] Read of size 8 at addr ffff88800c564d08 by task sshd/218 [ 38.858973] [ 38.859122] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.859570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.860076] Call Trace: [ 38.860243] <TASK> [ 38.860392] dump_stack_lvl+0x91/0xf0 [ 38.860648] print_report+0xcc/0x620 [ 38.860899] ? __virt_addr_valid+0x102/0x340 [ 38.861193] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861523] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861843] kasan_report+0xbe/0xf0 [ 38.862093] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862487] vma_interval_tree_remove+0xc75/0xec0 [ 38.862880] vma_prepare+0xc54/0x11a0 [ 38.863134] __split_vma+0x5af/0x950 [ 38.863381] ? __pfx___split_vma+0x10/0x10 [ 38.863657] ? find_held_lock+0x2c/0x110 [ 38.863928] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.864223] ? lock_is_held_type+0x9f/0x120 [ 38.864512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.864841] ? mtree_range_walk+0x632/0x900 [ 38.865135] ? mas_walk+0x5c7/0x7c0 [ 38.865384] do_vmi_munmap+0x1f1/0x2b0 [ 38.865643] mmap_region+0x1f9/0x2660 [ 38.865894] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.866163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866533] ? __pfx_lock_acquire+0x10/0x10 [ 38.866812] ? __pfx_mmap_region+0x10/0x10 [ 38.867090] ? security_mmap_addr+0x7d/0xa0 [ 38.867369] ? get_unmapped_area+0x1f5/0x3f0 [ 38.867663] do_mmap+0x854/0xf00 [ 38.867901] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.868167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.868466] ksys_mmap_pgoff+0x3af/0x500 [ 38.868763] do_syscall_64+0x3f/0x90 [ 38.869041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869415] RIP: 0033:0x7f56737f8d82 [ 38.869663] 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 [ 38.870824] RSP: 002b:00007ffe9c4ca528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.871319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56737f8d82 [ 38.871784] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5672c32000 [ 38.872245] RBP: 00007f5672c32000 R08: 0000000000000009 R09: 0000000000001000 [ 38.872705] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626736aeec0 [ 38.873171] R13: 00007ffe9c4ca540 R14: 00007ffe9c4ca570 R15: 00007ffe9c4ca8d0 [ 38.873639] </TASK> [ 38.873798] [ 38.873915] Allocated by task 211: [ 38.874149] kasan_save_stack+0x22/0x50 [ 38.874423] kasan_set_track+0x25/0x30 [ 38.874690] __kasan_slab_alloc+0x59/0x70 [ 38.874976] kmem_cache_alloc+0x16b/0x370 [ 38.875261] vm_area_dup+0x20/0x160 [ 38.875513] __split_vma+0x170/0x950 [ 38.875766] split_vma+0xc6/0x110 [ 38.876008] mprotect_fixup+0x8d2/0xb30 [ 38.876283] do_mprotect_pkey+0x87e/0xd40 [ 38.876564] __x64_sys_mprotect+0x78/0xc0 [ 38.876848] do_syscall_64+0x3f/0x90 [ 38.877120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877477] [ 38.877594] Freed by task 211: [ 38.877810] kasan_save_stack+0x22/0x50 [ 38.878086] kasan_set_track+0x25/0x30 [ 38.878353] kasan_save_free_info+0x2b/0x50 [ 38.878644] __kasan_slab_free+0x10a/0x190 [ 38.878936] kmem_cache_free+0x10d/0x4d0 [ 38.879217] rcu_core+0x8c8/0x2860 [ 38.879460] __do_softirq+0x1b7/0x7d4 [ 38.879722] [ 38.879841] Last potentially related work creation: [ 38.880160] kasan_save_stack+0x22/0x50 [ 38.880435] __kasan_record_aux_stack+0x8e/0xa0 [ 38.880752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.881109] remove_vma+0x139/0x170 [ 38.881359] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.881661] do_vmi_munmap+0x1f1/0x2b0 [ 38.881930] __vm_munmap+0x138/0x3a0 [ 38.882188] __x64_sys_munmap+0x59/0x80 [ 38.882460] do_syscall_64+0x3f/0x90 [ 38.882718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883070] [ 38.883187] The buggy address belongs to the object at ffff88800c564cb0 [ 38.883187] which belongs to the cache vm_area_struct of size 168 [ 38.883987] The buggy address is located 88 bytes inside of [ 38.883987] freed 168-byte region [ffff88800c564cb0, ffff88800c564d58) [ 38.884753] [ 38.884870] The buggy address belongs to the physical page: [ 38.885245] page:00000000eb45de58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc564 [ 38.885849] memcg:ffff88800d0fb601 [ 38.886088] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.886444] page_type: 0xffffffff() [ 38.886692] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.887199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0fb601 [ 38.887694] page dumped because: kasan: bad access detected [ 38.888056] [ 38.888172] Memory state around the buggy address: [ 38.888490] ffff88800c564c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.888959] ffff88800c564c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.889434] >ffff88800c564d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.889906] ^ [ 38.890145] ffff88800c564d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.890614] ffff88800c564e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.891089] ================================================================== [ 38.891598] Disabling lock debugging due to kernel taint [ 41.230622] BUG: Bad rss-counter state mm:00000000b5597718 type:MM_FILEPAGES val:33 [ 41.231783] BUG: Bad rss-counter state mm:00000000b5597718 type:MM_ANONPAGES val:22 [ 41.681312] BUG: Bad rss-counter state mm:00000000e51b687d type:MM_FILEPAGES val:33 [ 41.682510] BUG: Bad rss-counter state mm:00000000e51b687d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59233' (ECDSA) to the list of known hosts. 2023/06/20 18:02:28 fuzzer started 2023/06/20 18:02:28 dialing manager at localhost:36067 2023/06/20 18:02:28 checking machine... 2023/06/20 18:02:28 checking revisions... [ 42.389184] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:02:28 testing simple program... [ 42.439390] cgroup: Unknown subsys name 'net' [ 42.489071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:02:27 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=00007f04e19addc0 CR3=000000000965a000 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=2037323a32303a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f1fd1c0 RSI=ffffffff83ab1b07 RDI=ffffffff87f9768c RBP=0000000000000000 RSP=ffff88800f14f500 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000bd500000bd5 R12=0000000000000000 R13=0000000000000060 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff84511dc0 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 00007f967373d900 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=00007f9673cf4618 CR3=000000000d6ec000 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=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