syzkaller login: [ 30.576688] BUG: Bad rss-counter state mm:00000000db48add6 type:MM_FILEPAGES val:33 [ 30.578151] BUG: Bad rss-counter state mm:00000000db48add6 type:MM_ANONPAGES val:22 [ 30.738434] ================================================================== [ 30.739391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740328] Read of size 8 at addr ffff88800f128140 by task sshd/221 [ 30.741096] [ 30.741314] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743370] Call Trace: [ 30.743687] [ 30.743978] dump_stack_lvl+0x91/0xf0 [ 30.744484] print_report+0xcc/0x620 [ 30.744966] ? __virt_addr_valid+0x102/0x340 [ 30.745509] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746767] kasan_report+0xbe/0xf0 [ 30.747252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747869] vma_interval_tree_remove+0xc75/0xec0 [ 30.748467] vma_prepare+0xc54/0x11a0 [ 30.748949] __split_vma+0x5af/0x950 [ 30.749419] ? __pfx___split_vma+0x10/0x10 [ 30.749946] ? find_held_lock+0x2c/0x110 [ 30.750483] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751053] ? lock_is_held_type+0x9f/0x120 [ 30.751593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752195] ? mtree_range_walk+0x632/0x900 [ 30.752756] ? mas_walk+0x5c7/0x7c0 [ 30.753231] do_vmi_munmap+0x1f1/0x2b0 [ 30.753730] mmap_region+0x1f9/0x2660 [ 30.754221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.754740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.755442] ? __pfx_lock_acquire+0x10/0x10 [ 30.755980] ? __pfx_mmap_region+0x10/0x10 [ 30.756503] ? security_mmap_addr+0x7d/0xa0 [ 30.757048] ? get_unmapped_area+0x1f5/0x3f0 [ 30.757592] do_mmap+0x854/0xf00 [ 30.758046] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.758534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759104] ksys_mmap_pgoff+0x3af/0x500 [ 30.759613] do_syscall_64+0x3f/0x90 [ 30.760090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760741] RIP: 0033:0x7fccf4c39d82 [ 30.761196] 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 [ 30.763334] RSP: 002b:00007ffcf59ac538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.764238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccf4c39d82 [ 30.765086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccf4073000 [ 30.765932] RBP: 00007fccf4073000 R08: 0000000000000009 R09: 0000000000001000 [ 30.766787] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f012a12d90 [ 30.767626] R13: 00007ffcf59ac550 R14: 00007ffcf59ac580 R15: 00007ffcf59ac8e0 [ 30.768474] [ 30.768763] [ 30.768981] Allocated by task 214: [ 30.769412] kasan_save_stack+0x22/0x50 [ 30.769921] kasan_set_track+0x25/0x30 [ 30.770421] __kasan_slab_alloc+0x59/0x70 [ 30.770953] kmem_cache_alloc+0x16b/0x370 [ 30.771473] vm_area_dup+0x20/0x160 [ 30.771933] __split_vma+0x170/0x950 [ 30.772392] split_vma+0xc6/0x110 [ 30.772832] mprotect_fixup+0x8d2/0xb30 [ 30.773330] do_mprotect_pkey+0x87e/0xd40 [ 30.773846] __x64_sys_mprotect+0x78/0xc0 [ 30.774377] do_syscall_64+0x3f/0x90 [ 30.774862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775505] [ 30.775719] Freed by task 214: [ 30.776117] kasan_save_stack+0x22/0x50 [ 30.776622] kasan_set_track+0x25/0x30 [ 30.777108] kasan_save_free_info+0x2b/0x50 [ 30.777634] __kasan_slab_free+0x10a/0x190 [ 30.778176] kmem_cache_free+0x10d/0x4d0 [ 30.778688] rcu_core+0x8c8/0x2860 [ 30.779138] __do_softirq+0x1b7/0x7d4 [ 30.779622] [ 30.779840] Last potentially related work creation: [ 30.780422] kasan_save_stack+0x22/0x50 [ 30.780928] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782153] remove_vma+0x139/0x170 [ 30.782606] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783254] do_vmi_munmap+0x1f1/0x2b0 [ 30.783738] __vm_munmap+0x138/0x3a0 [ 30.784203] __x64_sys_munmap+0x59/0x80 [ 30.784709] do_syscall_64+0x3f/0x90 [ 30.785182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785832] [ 30.786066] Second to last potentially related work creation: [ 30.786745] kasan_save_stack+0x22/0x50 [ 30.787246] __kasan_record_aux_stack+0x8e/0xa0 [ 30.787842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.788480] remove_vma+0x139/0x170 [ 30.788931] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.789491] do_vmi_munmap+0x1f1/0x2b0 [ 30.789974] mmap_region+0x1f9/0x2660 [ 30.790462] do_mmap+0x854/0xf00 [ 30.790892] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.791390] ksys_mmap_pgoff+0x3af/0x500 [ 30.791890] do_syscall_64+0x3f/0x90 [ 30.792367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793011] [ 30.793226] The buggy address belongs to the object at ffff88800f1280e8 [ 30.793226] which belongs to the cache vm_area_struct of size 168 [ 30.794700] The buggy address is located 88 bytes inside of [ 30.794700] freed 168-byte region [ffff88800f1280e8, ffff88800f128190) [ 30.796102] [ 30.796318] The buggy address belongs to the physical page: [ 30.796983] page:00000000192af549 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf128 [ 30.798108] memcg:ffff88800f127101 [ 30.798532] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.799179] page_type: 0xffffffff() [ 30.799634] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.800555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f127101 [ 30.801488] page dumped because: kasan: bad access detected [ 30.802174] [ 30.802389] Memory state around the buggy address: [ 30.802978] ffff88800f128000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.803835] ffff88800f128080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.804699] >ffff88800f128100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.805568] ^ [ 30.806212] ffff88800f128180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.807074] ffff88800f128200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.807924] ================================================================== [ 30.808860] Disabling lock debugging due to kernel taint [ 32.959921] BUG: Bad rss-counter state mm:0000000057ff6723 type:MM_FILEPAGES val:33 [ 32.960914] BUG: Bad rss-counter state mm:0000000057ff6723 type:MM_ANONPAGES val:22 [ 33.304188] BUG: Bad rss-counter state mm:00000000962c8cbd type:MM_FILEPAGES val:33 [ 33.305243] BUG: Bad rss-counter state mm:00000000962c8cbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36082' (ECDSA) to the list of known hosts. 2023/06/20 12:16:00 fuzzer started 2023/06/20 12:16:00 dialing manager at localhost:36067 2023/06/20 12:16:00 checking machine... 2023/06/20 12:16:00 checking revisions... [ 33.977386] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:16:00 testing simple program... [ 34.030427] cgroup: Unknown subsys name 'net' [ 34.074444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11002d4afa5 RCX=ffffffff818f6d40 RDX=ffff888016551b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016a57cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888016a57d48 R13=0000000000000000 R14=000000000000c000 R15=ffff888019a0a340 RIP=ffffffff814c086b 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 00007fa95c3ef900 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=00007fa95c9a6618 CR3=000000000ef88000 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=563412feff00545000000000000080fe 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f6178930020 CR3=000000000d1c6000 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=2030303a36313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000