syzkaller login: [ 31.047353] BUG: Bad rss-counter state mm:0000000074370527 type:MM_FILEPAGES val:33 [ 31.048788] BUG: Bad rss-counter state mm:0000000074370527 type:MM_ANONPAGES val:22 [ 31.197485] ================================================================== [ 31.198402] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.199334] Read of size 8 at addr ffff88801697edf0 by task sshd/220 [ 31.200195] [ 31.200426] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202300] Call Trace: [ 31.202620] [ 31.202911] dump_stack_lvl+0x91/0xf0 [ 31.203407] print_report+0xcc/0x620 [ 31.203905] ? __virt_addr_valid+0x102/0x340 [ 31.204466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205739] kasan_report+0xbe/0xf0 [ 31.206222] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206848] vma_interval_tree_remove+0xc75/0xec0 [ 31.207456] vma_prepare+0xc54/0x11a0 [ 31.207935] __split_vma+0x5af/0x950 [ 31.208408] ? __pfx___split_vma+0x10/0x10 [ 31.208960] ? find_held_lock+0x2c/0x110 [ 31.209482] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.210044] ? lock_is_held_type+0x9f/0x120 [ 31.210582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211185] ? mtree_range_walk+0x632/0x900 [ 31.211745] ? mas_walk+0x5c7/0x7c0 [ 31.212221] do_vmi_munmap+0x1f1/0x2b0 [ 31.212739] mmap_region+0x1f9/0x2660 [ 31.213228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214484] ? __pfx_lock_acquire+0x10/0x10 [ 31.215015] ? __pfx_mmap_region+0x10/0x10 [ 31.215548] ? security_mmap_addr+0x7d/0xa0 [ 31.216091] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216664] do_mmap+0x854/0xf00 [ 31.217104] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218183] ksys_mmap_pgoff+0x3af/0x500 [ 31.218696] do_syscall_64+0x3f/0x90 [ 31.219180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219844] RIP: 0033:0x7ff70bdf0d82 [ 31.220316] 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 [ 31.222464] RSP: 002b:00007ffdb2d26458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff70bdf0d82 [ 31.224222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff70b22a000 [ 31.225079] RBP: 00007ff70b22a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225922] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633fe139b20 [ 31.226765] R13: 00007ffdb2d26470 R14: 00007ffdb2d264a0 R15: 00007ffdb2d26800 [ 31.227617] [ 31.227911] [ 31.228128] Allocated by task 213: [ 31.228560] kasan_save_stack+0x22/0x50 [ 31.229080] kasan_set_track+0x25/0x30 [ 31.229573] __kasan_slab_alloc+0x59/0x70 [ 31.230101] kmem_cache_alloc+0x16b/0x370 [ 31.230624] vm_area_dup+0x20/0x160 [ 31.231079] __split_vma+0x170/0x950 [ 31.231553] split_vma+0xc6/0x110 [ 31.231991] mprotect_fixup+0x8d2/0xb30 [ 31.232497] do_mprotect_pkey+0x87e/0xd40 [ 31.233050] __x64_sys_mprotect+0x78/0xc0 [ 31.233571] do_syscall_64+0x3f/0x90 [ 31.234045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234686] [ 31.234899] Freed by task 213: [ 31.235292] kasan_save_stack+0x22/0x50 [ 31.235801] kasan_set_track+0x25/0x30 [ 31.236308] kasan_save_free_info+0x2b/0x50 [ 31.236863] __kasan_slab_free+0x10a/0x190 [ 31.237408] kmem_cache_free+0x10d/0x4d0 [ 31.237914] rcu_core+0x8c8/0x2860 [ 31.238358] __do_softirq+0x1b7/0x7d4 [ 31.238856] [ 31.239075] Last potentially related work creation: [ 31.239654] kasan_save_stack+0x22/0x50 [ 31.240155] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241385] remove_vma+0x139/0x170 [ 31.241836] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242391] do_vmi_munmap+0x1f1/0x2b0 [ 31.242885] __vm_munmap+0x138/0x3a0 [ 31.243368] __x64_sys_munmap+0x59/0x80 [ 31.243861] do_syscall_64+0x3f/0x90 [ 31.244338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244993] [ 31.245209] The buggy address belongs to the object at ffff88801697ed98 [ 31.245209] which belongs to the cache vm_area_struct of size 168 [ 31.246684] The buggy address is located 88 bytes inside of [ 31.246684] freed 168-byte region [ffff88801697ed98, ffff88801697ee40) [ 31.248111] [ 31.248330] The buggy address belongs to the physical page: [ 31.249002] page:000000008bcc3e84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1697e [ 31.250092] memcg:ffff88800d47f001 [ 31.250528] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251237] page_type: 0xffffffff() [ 31.251699] raw: 0100000000000200 ffff8880087a0c80 ffffea000059d980 dead000000000003 [ 31.252652] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d47f001 [ 31.253578] page dumped because: kasan: bad access detected [ 31.254241] [ 31.254459] Memory state around the buggy address: [ 31.255043] ffff88801697ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.255915] ffff88801697ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.256783] >ffff88801697ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.257638] ^ [ 31.258442] ffff88801697ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.259298] ffff88801697ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.260149] ================================================================== [ 31.261293] Disabling lock debugging due to kernel taint [ 33.589553] BUG: Bad rss-counter state mm:00000000bb10a724 type:MM_FILEPAGES val:33 [ 33.590719] BUG: Bad rss-counter state mm:00000000bb10a724 type:MM_ANONPAGES val:22 [ 33.971285] BUG: Bad rss-counter state mm:000000001f07aea9 type:MM_FILEPAGES val:33 [ 33.972305] BUG: Bad rss-counter state mm:000000001f07aea9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47906' (ECDSA) to the list of known hosts. 2023/06/20 23:25:19 fuzzer started 2023/06/20 23:25:19 dialing manager at localhost:36067 2023/06/20 23:25:19 checking machine... 2023/06/20 23:25:19 checking revisions... [ 34.686191] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:25:19 testing simple program... [ 34.739892] cgroup: Unknown subsys name 'net' [ 34.781888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:25:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000001b RCX=ffffffff811f7e49 RDX=ffff88801a073680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801026a8c0 RSP=ffff888019e3fbb0 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001b R11=0000091000000910 R12=ffffffff854f6380 R13=0000000000000014 R14=0000000000000000 R15=ffff888016739a00 RIP=ffffffff814c027c 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 00007f946bd80900 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=00007f946c337618 CR3=000000001cdd8000 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=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e137e RSI=ffffffff81809add RDI=ffff88806cf09b6c RBP=ffff88806cf09bf0 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff8880193edec0 RIP=ffffffff813ad543 RFL=00000216 [----AP-] 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 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=00007f2621684cd0 CR3=000000000d64e000 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=79f4d241db48f09da34c979658ec9825 XMM02=2c67c8bc2e329bc3000000000011c500 XMM03=fb795ef6d657705600000000001232e0 XMM04=0f2dbeea23ed12f800000000000ae988 XMM05=19e9129bd510f2350000000000133168 XMM06=37811afee7c859090000000000131fd0 XMM07=e042d86d42eb936e0000000000123cc8 XMM08=2892ff28b86a4e94000000000011c560 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000