syzkaller login: [ 30.265733] BUG: Bad rss-counter state mm:000000006ca933bb type:MM_FILEPAGES val:33 [ 30.267539] BUG: Bad rss-counter state mm:000000006ca933bb type:MM_ANONPAGES val:22 [ 30.433943] ================================================================== [ 30.434869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.435811] Read of size 8 at addr ffff88800f6b7df0 by task sshd/218 [ 30.436658] [ 30.436917] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.437780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.438780] Call Trace: [ 30.439102] [ 30.439389] dump_stack_lvl+0x91/0xf0 [ 30.439895] print_report+0xcc/0x620 [ 30.440383] ? __virt_addr_valid+0x102/0x340 [ 30.440938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.441552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.442174] kasan_report+0xbe/0xf0 [ 30.442666] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.443291] vma_interval_tree_remove+0xc75/0xec0 [ 30.443896] vma_prepare+0xc54/0x11a0 [ 30.444378] __split_vma+0x5af/0x950 [ 30.444856] ? __pfx___split_vma+0x10/0x10 [ 30.445384] ? find_held_lock+0x2c/0x110 [ 30.445914] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.446489] ? lock_is_held_type+0x9f/0x120 [ 30.447035] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.447647] ? mtree_range_walk+0x632/0x900 [ 30.448197] ? mas_walk+0x5c7/0x7c0 [ 30.448678] do_vmi_munmap+0x1f1/0x2b0 [ 30.449181] mmap_region+0x1f9/0x2660 [ 30.449669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.450179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.450909] ? __pfx_lock_acquire+0x10/0x10 [ 30.451441] ? __pfx_mmap_region+0x10/0x10 [ 30.451977] ? security_mmap_addr+0x7d/0xa0 [ 30.452504] ? get_unmapped_area+0x1f5/0x3f0 [ 30.453053] do_mmap+0x854/0xf00 [ 30.453494] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.453988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.454559] ksys_mmap_pgoff+0x3af/0x500 [ 30.455071] do_syscall_64+0x3f/0x90 [ 30.455560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.456222] RIP: 0033:0x7f5c2c55bd82 [ 30.456686] 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 [ 30.458810] RSP: 002b:00007ffc4ae25df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.459750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c2c55bd82 [ 30.460609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c2b995000 [ 30.461476] RBP: 00007f5c2b995000 R08: 0000000000000009 R09: 0000000000001000 [ 30.462344] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c358c9f70 [ 30.463216] R13: 00007ffc4ae25e10 R14: 00007ffc4ae25e40 R15: 00007ffc4ae261a0 [ 30.464098] [ 30.464392] [ 30.464617] Allocated by task 211: [ 30.465058] kasan_save_stack+0x22/0x50 [ 30.465567] kasan_set_track+0x25/0x30 [ 30.466071] __kasan_slab_alloc+0x59/0x70 [ 30.466629] kmem_cache_alloc+0x16b/0x370 [ 30.467152] vm_area_dup+0x20/0x160 [ 30.467611] __split_vma+0x170/0x950 [ 30.468077] split_vma+0xc6/0x110 [ 30.468520] mprotect_fixup+0x8d2/0xb30 [ 30.469042] do_mprotect_pkey+0x87e/0xd40 [ 30.469561] __x64_sys_mprotect+0x78/0xc0 [ 30.470083] do_syscall_64+0x3f/0x90 [ 30.470564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.471227] [ 30.471444] Freed by task 211: [ 30.471842] kasan_save_stack+0x22/0x50 [ 30.472342] kasan_set_track+0x25/0x30 [ 30.472838] kasan_save_free_info+0x2b/0x50 [ 30.473370] __kasan_slab_free+0x10a/0x190 [ 30.473910] kmem_cache_free+0x10d/0x4d0 [ 30.474420] rcu_core+0x8c8/0x2860 [ 30.474877] __do_softirq+0x1b7/0x7d4 [ 30.475352] [ 30.475570] Last potentially related work creation: [ 30.476167] kasan_save_stack+0x22/0x50 [ 30.476682] __kasan_record_aux_stack+0x8e/0xa0 [ 30.477258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.477906] remove_vma+0x139/0x170 [ 30.478356] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.478928] do_vmi_munmap+0x1f1/0x2b0 [ 30.479417] __vm_munmap+0x138/0x3a0 [ 30.479883] __x64_sys_munmap+0x59/0x80 [ 30.480380] do_syscall_64+0x3f/0x90 [ 30.480858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.481501] [ 30.481719] Second to last potentially related work creation: [ 30.482403] kasan_save_stack+0x22/0x50 [ 30.482916] __kasan_record_aux_stack+0x8e/0xa0 [ 30.483492] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.484134] remove_vma+0x139/0x170 [ 30.484601] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.485168] do_vmi_munmap+0x1f1/0x2b0 [ 30.485656] mmap_region+0x1f9/0x2660 [ 30.486133] do_mmap+0x854/0xf00 [ 30.486593] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.487080] ksys_mmap_pgoff+0x3af/0x500 [ 30.487584] do_syscall_64+0x3f/0x90 [ 30.488059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.488708] [ 30.488925] The buggy address belongs to the object at ffff88800f6b7d98 [ 30.488925] which belongs to the cache vm_area_struct of size 168 [ 30.490388] The buggy address is located 88 bytes inside of [ 30.490388] freed 168-byte region [ffff88800f6b7d98, ffff88800f6b7e40) [ 30.491797] [ 30.492016] The buggy address belongs to the physical page: [ 30.492674] page:000000009f13514e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6b7 [ 30.493756] memcg:ffff88800c5ae201 [ 30.494182] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.494846] page_type: 0xffffffff() [ 30.495296] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.496232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5ae201 [ 30.497139] page dumped because: kasan: bad access detected [ 30.497803] [ 30.498020] Memory state around the buggy address: [ 30.498620] ffff88800f6b7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.499483] ffff88800f6b7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.500336] >ffff88800f6b7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.501199] ^ [ 30.502014] ffff88800f6b7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.502885] ffff88800f6b7e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.503742] ================================================================== [ 30.504831] Disabling lock debugging due to kernel taint [ 32.468621] BUG: Bad rss-counter state mm:000000007c032d13 type:MM_FILEPAGES val:33 [ 32.469810] BUG: Bad rss-counter state mm:000000007c032d13 type:MM_ANONPAGES val:22 [ 32.904268] BUG: Bad rss-counter state mm:000000005405562a type:MM_FILEPAGES val:33 [ 32.905270] BUG: Bad rss-counter state mm:000000005405562a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28558' (ECDSA) to the list of known hosts. 2023/06/20 21:35:25 fuzzer started 2023/06/20 21:35:25 dialing manager at localhost:36067 2023/06/20 21:35:25 checking machine... 2023/06/20 21:35:25 checking revisions... [ 33.637231] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:35:25 testing simple program... [ 33.678030] cgroup: Unknown subsys name 'net' [ 33.719923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:25 Registers: info registers vcpu 0 RAX=1ffffffff0ff2ed1 RBX=ffff888009a77160 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9768c RBP=00000000a7f2a0ef RSP=ffff8880102ff508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000a8100000a81 R12=0000000000000000 R13=000000000000002c R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab197d RFL=00000217 [----APC] 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 00007fbf721a4900 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=00007ffd05ee1000 CR3=000000000e746000 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=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 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=ffff888008c04400 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=00007f58d2b65560 CR3=000000001694e000 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=2034323a35333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a35333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000