syzkaller login: [ 34.932200] BUG: Bad rss-counter state mm:000000001f7a9c44 type:MM_FILEPAGES val:33 [ 34.934003] BUG: Bad rss-counter state mm:000000001f7a9c44 type:MM_ANONPAGES val:22 [ 35.054791] ================================================================== [ 35.055808] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.056863] Read of size 8 at addr ffff88800d6b0058 by task sshd/222 [ 35.057727] [ 35.057976] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.059197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.060279] Call Trace: [ 35.060640] [ 35.060961] dump_stack_lvl+0x91/0xf0 [ 35.061535] print_report+0xcc/0x620 [ 35.062083] ? __virt_addr_valid+0x102/0x340 [ 35.062564] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.063009] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.063445] kasan_report+0xbe/0xf0 [ 35.063784] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.064221] vma_interval_tree_remove+0xc75/0xec0 [ 35.064645] vma_prepare+0xc54/0x11a0 [ 35.064987] __split_vma+0x5af/0x950 [ 35.065323] ? __pfx___split_vma+0x10/0x10 [ 35.065701] ? find_held_lock+0x2c/0x110 [ 35.066076] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.066483] ? __pfx_mark_lock.part.0+0x10/0x10 [ 35.066908] ? lock_is_held_type+0x9f/0x120 [ 35.067295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.067732] ? mtree_range_walk+0x632/0x900 [ 35.068129] ? mas_walk+0x5c7/0x7c0 [ 35.068471] do_vmi_munmap+0x1f1/0x2b0 [ 35.068827] mmap_region+0x1f9/0x2660 [ 35.069174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.069689] ? __pfx_lock_acquire+0x10/0x10 [ 35.070075] ? __pfx_mmap_region+0x10/0x10 [ 35.070488] ? security_mmap_addr+0x7d/0xa0 [ 35.070898] ? get_unmapped_area+0x1f5/0x3f0 [ 35.071298] do_mmap+0x854/0xf00 [ 35.071614] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.071978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.072391] ksys_mmap_pgoff+0x3af/0x500 [ 35.072754] do_syscall_64+0x3f/0x90 [ 35.073104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.073571] RIP: 0033:0x7fe73cfd6d82 [ 35.073902] 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 [ 35.075789] RSP: 002b:00007fff7edc4358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.076648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe73cfd6d82 [ 35.077444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe73c410000 [ 35.078249] RBP: 00007fe73c410000 R08: 0000000000000009 R09: 0000000000001000 [ 35.079052] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e5d262f70 [ 35.079859] R13: 00007fff7edc4370 R14: 00007fff7edc43a0 R15: 00007fff7edc4700 [ 35.080655] [ 35.080924] [ 35.081119] Allocated by task 215: [ 35.081513] kasan_save_stack+0x22/0x50 [ 35.081911] kasan_set_track+0x25/0x30 [ 35.082317] __kasan_slab_alloc+0x59/0x70 [ 35.082748] kmem_cache_alloc+0x16b/0x370 [ 35.083133] vm_area_dup+0x20/0x160 [ 35.083473] __split_vma+0x170/0x950 [ 35.083820] split_vma+0xc6/0x110 [ 35.084150] mprotect_fixup+0x8d2/0xb30 [ 35.084527] do_mprotect_pkey+0x87e/0xd40 [ 35.084915] __x64_sys_mprotect+0x78/0xc0 [ 35.085308] do_syscall_64+0x3f/0x90 [ 35.085699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.086216] [ 35.086381] Freed by task 13: [ 35.086668] kasan_save_stack+0x22/0x50 [ 35.087063] kasan_set_track+0x25/0x30 [ 35.087433] kasan_save_free_info+0x2b/0x50 [ 35.087831] __kasan_slab_free+0x10a/0x190 [ 35.088265] kmem_cache_free+0x10d/0x4d0 [ 35.088680] rcu_core+0x8c8/0x2860 [ 35.089014] __do_softirq+0x1b7/0x7d4 [ 35.089402] [ 35.089574] Last potentially related work creation: [ 35.090049] kasan_save_stack+0x22/0x50 [ 35.090457] __kasan_record_aux_stack+0x8e/0xa0 [ 35.090925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.091443] remove_vma+0x139/0x170 [ 35.091810] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.092256] do_vmi_munmap+0x1f1/0x2b0 [ 35.092651] __vm_munmap+0x138/0x3a0 [ 35.093032] __x64_sys_munmap+0x59/0x80 [ 35.093433] do_syscall_64+0x3f/0x90 [ 35.093811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.094330] [ 35.094510] The buggy address belongs to the object at ffff88800d6b0000 [ 35.094510] which belongs to the cache vm_area_struct of size 168 [ 35.095709] The buggy address is located 88 bytes inside of [ 35.095709] freed 168-byte region [ffff88800d6b0000, ffff88800d6b00a8) [ 35.096845] [ 35.097018] The buggy address belongs to the physical page: [ 35.097556] page:0000000048adcd25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6b0 [ 35.098440] memcg:ffff888016535301 [ 35.098816] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.099347] page_type: 0xffffffff() [ 35.099718] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.100537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016535301 [ 35.101273] page dumped because: kasan: bad access detected [ 35.101820] [ 35.101997] Memory state around the buggy address: [ 35.102475] ffff88800d6aff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.103183] ffff88800d6aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.103883] >ffff88800d6b0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.104583] ^ [ 35.105175] ffff88800d6b0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.105877] ffff88800d6b0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.106565] ================================================================== [ 35.107453] Disabling lock debugging due to kernel taint [ 37.211086] BUG: Bad rss-counter state mm:000000000c87252e type:MM_FILEPAGES val:33 [ 37.212248] BUG: Bad rss-counter state mm:000000000c87252e type:MM_ANONPAGES val:22 [ 37.599674] BUG: Bad rss-counter state mm:000000007a0b1880 type:MM_FILEPAGES val:33 [ 37.600588] BUG: Bad rss-counter state mm:000000007a0b1880 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50434' (ECDSA) to the list of known hosts. 2023/06/19 16:55:51 fuzzer started 2023/06/19 16:55:51 dialing manager at localhost:44161 2023/06/19 16:55:51 checking machine... 2023/06/19 16:55:51 checking revisions... [ 38.314377] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:55:51 testing simple program... [ 38.359610] cgroup: Unknown subsys name 'net' [ 38.402558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:47 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff8135bd5e RDX=00000000000035bd RSI=00000000000035bd RDI=ffffffff864f52b4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113078b 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 00007fd52d22d700 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=00007f95a16067b0 CR3=000000000e84e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732031353a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343336 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8118d7de RSP=ffff888008e57ea0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffffffff854e8ec0 R13=ffffffff8118d7b0 R14=ffff888008e2d1c0 R15=0000000000000001 RIP=ffffffff812d145e RFL=00000046 [---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 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=00007ffea086f000 CR3=000000000e9a0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000