syzkaller login: [ 38.290350] BUG: Bad rss-counter state mm:000000004f75b4b9 type:MM_FILEPAGES val:33 [ 38.291303] BUG: Bad rss-counter state mm:000000004f75b4b9 type:MM_ANONPAGES val:22 [ 38.393976] ================================================================== [ 38.394618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.395226] Read of size 8 at addr ffff8880143685c8 by task sshd/221 [ 38.395767] [ 38.395958] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.396535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.397152] Call Trace: [ 38.397399] [ 38.397603] dump_stack_lvl+0x91/0xf0 [ 38.398091] print_report+0xcc/0x620 [ 38.398439] ? __virt_addr_valid+0x102/0x340 [ 38.398806] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.399205] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.399645] kasan_report+0xbe/0xf0 [ 38.399966] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.400434] vma_interval_tree_remove+0xc75/0xec0 [ 38.400816] vma_prepare+0xc54/0x11a0 [ 38.401128] __split_vma+0x5af/0x950 [ 38.401438] ? __pfx___split_vma+0x10/0x10 [ 38.401770] ? find_held_lock+0x2c/0x110 [ 38.402107] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.402475] ? lock_is_held_type+0x9f/0x120 [ 38.402826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.403212] ? mtree_range_walk+0x632/0x900 [ 38.403563] ? mas_walk+0x5c7/0x7c0 [ 38.403905] do_vmi_munmap+0x1f1/0x2b0 [ 38.404233] mmap_region+0x1f9/0x2660 [ 38.404595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.404929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.405418] ? __pfx_lock_acquire+0x10/0x10 [ 38.405768] ? __pfx_mmap_region+0x10/0x10 [ 38.406111] ? security_mmap_addr+0x7d/0xa0 [ 38.406501] ? get_unmapped_area+0x1f5/0x3f0 [ 38.406859] do_mmap+0x854/0xf00 [ 38.407146] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.407495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.407844] ksys_mmap_pgoff+0x3af/0x500 [ 38.408191] do_syscall_64+0x3f/0x90 [ 38.408519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.408932] RIP: 0033:0x7fb9384acd82 [ 38.409235] 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 [ 38.410583] RSP: 002b:00007ffcf90f2508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.411154] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9384acd82 [ 38.411709] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9378e6000 [ 38.412263] RBP: 00007fb9378e6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.412809] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575b3a4bec0 [ 38.413354] R13: 00007ffcf90f2520 R14: 00007ffcf90f2550 R15: 00007ffcf90f28b0 [ 38.413909] [ 38.414104] [ 38.414244] Allocated by task 214: [ 38.414532] kasan_save_stack+0x22/0x50 [ 38.414865] kasan_set_track+0x25/0x30 [ 38.415193] __kasan_slab_alloc+0x59/0x70 [ 38.415531] kmem_cache_alloc+0x16b/0x370 [ 38.415890] vm_area_dup+0x20/0x160 [ 38.416190] __split_vma+0x170/0x950 [ 38.416506] split_vma+0xc6/0x110 [ 38.416784] mprotect_fixup+0x8d2/0xb30 [ 38.417116] do_mprotect_pkey+0x87e/0xd40 [ 38.417452] __x64_sys_mprotect+0x78/0xc0 [ 38.417785] do_syscall_64+0x3f/0x90 [ 38.418095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.418512] [ 38.418654] Freed by task 214: [ 38.418906] kasan_save_stack+0x22/0x50 [ 38.419234] kasan_set_track+0x25/0x30 [ 38.419552] kasan_save_free_info+0x2b/0x50 [ 38.419905] __kasan_slab_free+0x10a/0x190 [ 38.420245] kmem_cache_free+0x10d/0x4d0 [ 38.420586] rcu_core+0x8c8/0x2860 [ 38.420884] __do_softirq+0x1b7/0x7d4 [ 38.421205] [ 38.421344] Last potentially related work creation: [ 38.421707] kasan_save_stack+0x22/0x50 [ 38.422022] __kasan_record_aux_stack+0x8e/0xa0 [ 38.422403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.422801] remove_vma+0x139/0x170 [ 38.423092] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.423447] do_vmi_munmap+0x1f1/0x2b0 [ 38.423752] __vm_munmap+0x138/0x3a0 [ 38.424073] __x64_sys_munmap+0x59/0x80 [ 38.424393] do_syscall_64+0x3f/0x90 [ 38.424695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.425107] [ 38.425244] The buggy address belongs to the object at ffff888014368570 [ 38.425244] which belongs to the cache vm_area_struct of size 168 [ 38.426188] The buggy address is located 88 bytes inside of [ 38.426188] freed 168-byte region [ffff888014368570, ffff888014368618) [ 38.427117] [ 38.427254] The buggy address belongs to the physical page: [ 38.427726] page:0000000016bb7a84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14368 [ 38.428477] memcg:ffff888017d79c01 [ 38.428751] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.429158] page_type: 0xffffffff() [ 38.429499] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.430101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d79c01 [ 38.430695] page dumped because: kasan: bad access detected [ 38.431129] [ 38.431275] Memory state around the buggy address: [ 38.431666] ffff888014368480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.432227] ffff888014368500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.432782] >ffff888014368580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.433321] ^ [ 38.433748] ffff888014368600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.434299] ffff888014368680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.434836] ================================================================== [ 38.435542] Disabling lock debugging due to kernel taint [ 40.429271] BUG: Bad rss-counter state mm:000000007fa7ce6b type:MM_FILEPAGES val:33 [ 40.429995] BUG: Bad rss-counter state mm:000000007fa7ce6b type:MM_ANONPAGES val:22 [ 40.821068] BUG: Bad rss-counter state mm:000000008e42ca4f type:MM_FILEPAGES val:33 [ 40.821784] BUG: Bad rss-counter state mm:000000008e42ca4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6274' (ECDSA) to the list of known hosts. 2023/06/20 09:53:16 fuzzer started 2023/06/20 09:53:16 dialing manager at localhost:44161 2023/06/20 09:53:16 checking machine... 2023/06/20 09:53:16 checking revisions... [ 41.375245] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:53:16 testing simple program... [ 41.405835] cgroup: Unknown subsys name 'net' [ 41.461483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe35484538 CR3=0000000005482000 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=00007f06e54e7510000055f82dbea790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861c7682 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800ffd7880 RSP=ffff88800ffd77b8 R8 =ffffffff861c7686 R9 =ffff88800ffd7868 R10=0000000000038001 R11=0000000000038dc4 R12=ffff88800ffd7888 R13=ffff88800ffd7870 R14=0000000000000005 R15=ffff88800ffd7828 RIP=ffffffff81130b39 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 00007f218f242900 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=00007f218f7f9618 CR3=000000001a20c000 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