syzkaller login: [ 30.412867] BUG: Bad rss-counter state mm:000000004398669e type:MM_FILEPAGES val:33 [ 30.414113] BUG: Bad rss-counter state mm:000000004398669e type:MM_ANONPAGES val:22 [ 30.460569] ================================================================== [ 30.461645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.462754] Read of size 8 at addr ffff88801a31f3f8 by task sshd/220 [ 30.463722] [ 30.463944] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.464814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.465898] Call Trace: [ 30.466254] [ 30.466563] dump_stack_lvl+0x91/0xf0 [ 30.467099] print_report+0xcc/0x620 [ 30.467630] ? __virt_addr_valid+0x102/0x340 [ 30.468230] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.468912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.469591] kasan_report+0xbe/0xf0 [ 30.470110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.470794] vma_interval_tree_remove+0xc75/0xec0 [ 30.471451] vma_prepare+0xc54/0x11a0 [ 30.471974] __split_vma+0x5af/0x950 [ 30.472492] ? __pfx___split_vma+0x10/0x10 [ 30.473085] ? find_held_lock+0x2c/0x110 [ 30.473656] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.474272] ? lock_is_held_type+0x9f/0x120 [ 30.474862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.475528] ? mtree_range_walk+0x632/0x900 [ 30.476132] ? mas_walk+0x5c7/0x7c0 [ 30.476676] do_vmi_munmap+0x1f1/0x2b0 [ 30.477220] mmap_region+0x1f9/0x2660 [ 30.477751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.478316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.479100] ? __pfx_lock_acquire+0x10/0x10 [ 30.479686] ? __pfx_mmap_region+0x10/0x10 [ 30.480266] ? security_mmap_addr+0x7d/0xa0 [ 30.480853] ? get_unmapped_area+0x1f5/0x3f0 [ 30.481453] do_mmap+0x854/0xf00 [ 30.481932] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.482474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.483094] ksys_mmap_pgoff+0x3af/0x500 [ 30.483653] do_syscall_64+0x3f/0x90 [ 30.484177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.484901] RIP: 0033:0x7f91f6ac6d82 [ 30.485400] 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 [ 30.487732] RSP: 002b:00007ffd65f14518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.488726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91f6ac6d82 [ 30.489660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91f5f00000 [ 30.490584] RBP: 00007f91f5f00000 R08: 0000000000000009 R09: 0000000000001000 [ 30.491521] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c314a6b20 [ 30.492458] R13: 00007ffd65f14530 R14: 00007ffd65f14560 R15: 00007ffd65f148c0 [ 30.493417] [ 30.493740] [ 30.493980] Allocated by task 213: [ 30.494457] kasan_save_stack+0x22/0x50 [ 30.495010] kasan_set_track+0x25/0x30 [ 30.495559] __kasan_slab_alloc+0x59/0x70 [ 30.496141] kmem_cache_alloc+0x16b/0x370 [ 30.496732] vm_area_dup+0x20/0x160 [ 30.497224] __split_vma+0x170/0x950 [ 30.497717] split_vma+0xc6/0x110 [ 30.498150] mprotect_fixup+0x8d2/0xb30 [ 30.498648] do_mprotect_pkey+0x87e/0xd40 [ 30.499171] __x64_sys_mprotect+0x78/0xc0 [ 30.499694] do_syscall_64+0x3f/0x90 [ 30.500166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.500823] [ 30.501037] Freed by task 213: [ 30.501496] kasan_save_stack+0x22/0x50 [ 30.502027] kasan_set_track+0x25/0x30 [ 30.502526] kasan_save_free_info+0x2b/0x50 [ 30.503058] __kasan_slab_free+0x10a/0x190 [ 30.503586] kmem_cache_free+0x10d/0x4d0 [ 30.504089] rcu_core+0x8c8/0x2860 [ 30.504546] __do_softirq+0x1b7/0x7d4 [ 30.505021] [ 30.505239] Last potentially related work creation: [ 30.505838] kasan_save_stack+0x22/0x50 [ 30.506368] __kasan_record_aux_stack+0x8e/0xa0 [ 30.506976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.507675] remove_vma+0x139/0x170 [ 30.508158] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.508770] do_vmi_munmap+0x1f1/0x2b0 [ 30.509294] __vm_munmap+0x138/0x3a0 [ 30.509798] __x64_sys_munmap+0x59/0x80 [ 30.510320] do_syscall_64+0x3f/0x90 [ 30.510835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.511534] [ 30.511765] The buggy address belongs to the object at ffff88801a31f3a0 [ 30.511765] which belongs to the cache vm_area_struct of size 168 [ 30.513352] The buggy address is located 88 bytes inside of [ 30.513352] freed 168-byte region [ffff88801a31f3a0, ffff88801a31f448) [ 30.514913] [ 30.515160] The buggy address belongs to the physical page: [ 30.515899] page:000000005dd81bb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a31f [ 30.517119] memcg:ffff88800cafd701 [ 30.517593] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.518298] page_type: 0xffffffff() [ 30.518797] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.519815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cafd701 [ 30.520826] page dumped because: kasan: bad access detected [ 30.521549] [ 30.521786] Memory state around the buggy address: [ 30.522428] ffff88801a31f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.523370] ffff88801a31f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.524341] >ffff88801a31f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.525332] ^ [ 30.526290] ffff88801a31f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.527272] ffff88801a31f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.528239] ================================================================== [ 30.529324] Disabling lock debugging due to kernel taint [ 32.590083] BUG: Bad rss-counter state mm:00000000849beb9c type:MM_FILEPAGES val:33 [ 32.591285] BUG: Bad rss-counter state mm:00000000849beb9c type:MM_ANONPAGES val:22 [ 33.139641] BUG: Bad rss-counter state mm:00000000ed55fa0c type:MM_FILEPAGES val:33 [ 33.140835] BUG: Bad rss-counter state mm:00000000ed55fa0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51366' (ECDSA) to the list of known hosts. 2023/06/20 16:28:48 fuzzer started 2023/06/20 16:28:49 dialing manager at localhost:36067 2023/06/20 16:28:49 checking machine... 2023/06/20 16:28:49 checking revisions... [ 33.796795] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:28:49 testing simple program... [ 33.857884] cgroup: Unknown subsys name 'net' [ 33.920725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a78 RCX=ffffffff812d86ea RDX=1ffff1100d9c135a RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880168ee600 RIP=ffffffff811303b2 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 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=00007f8bd4fef000 CR3=000000000c4a4000 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=56efa02bbf0ac5a82d4c21088a4c987f XMM02=000000000011b560eff9b2d0a8fce9cb XMM03=000000000011b6302c67c8bc2e329bc3 XMM04=96566df5012beedd00000000000ae988 XMM05=19e9129bd510f2350000000000131710 XMM06=db0b9240e2c681a800000000001308e8 XMM07=e042d86d42eb936e0000000000121b58 XMM08=baa52c3376f71e54000000000011b630 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019d37770 RCX=0000000000000001 RDX=1ffff110033a6e4d RSI=ffff888019d37740 RDI=ffff888019d37268 RBP=ffff888019d30000 RSP=ffff888019d371e8 R8 =0000000000000001 R9 =ffff888019d37298 R10=0000000000038001 R11=000000000008b38e R12=ffff888019d372b8 R13=ffff888019d372a0 R14=ffff888019d37740 R15=ffff888019d37258 RIP=ffffffff81131cac 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 00007fb5ea065900 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=00007fb5ea61c618 CR3=000000000ee98000 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