syzkaller login: [ 30.536145] BUG: Bad rss-counter state mm:00000000b41a5230 type:MM_FILEPAGES val:33 [ 30.537807] BUG: Bad rss-counter state mm:00000000b41a5230 type:MM_ANONPAGES val:22 [ 30.713861] ================================================================== [ 30.714857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715936] Read of size 8 at addr ffff888019fc04e0 by task sshd/219 [ 30.716849] [ 30.717085] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.718034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.719115] Call Trace: [ 30.719473] [ 30.719805] dump_stack_lvl+0x91/0xf0 [ 30.720352] print_report+0xcc/0x620 [ 30.720901] ? __virt_addr_valid+0x102/0x340 [ 30.721509] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722224] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722940] kasan_report+0xbe/0xf0 [ 30.723458] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724153] vma_interval_tree_remove+0xc75/0xec0 [ 30.724821] vma_prepare+0xc54/0x11a0 [ 30.725356] __split_vma+0x5af/0x950 [ 30.725905] ? __pfx___split_vma+0x10/0x10 [ 30.726498] ? find_held_lock+0x2c/0x110 [ 30.727104] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.727741] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.728412] ? __sanitizer_cov_trace_pc+0x4/0x70 [ 30.729068] do_vmi_munmap+0x1f1/0x2b0 [ 30.729596] mmap_region+0x1f9/0x2660 [ 30.730127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.730694] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.731473] ? __pfx_lock_acquire+0x10/0x10 [ 30.732072] ? __pfx_mmap_region+0x10/0x10 [ 30.732638] ? security_mmap_addr+0x7d/0xa0 [ 30.733214] ? get_unmapped_area+0x1f5/0x3f0 [ 30.733814] do_mmap+0x854/0xf00 [ 30.734285] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.734849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.735448] ksys_mmap_pgoff+0x3af/0x500 [ 30.736001] do_syscall_64+0x3f/0x90 [ 30.736507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737277] RIP: 0033:0x7f73fdc7cd82 [ 30.737814] 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 [ 30.740256] RSP: 002b:00007ffc7d5c15c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.741292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73fdc7cd82 [ 30.742271] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73fd0b6000 [ 30.743263] RBP: 00007f73fd0b6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.744229] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612929a9ec0 [ 30.745191] R13: 00007ffc7d5c15e0 R14: 00007ffc7d5c1610 R15: 00007ffc7d5c1970 [ 30.746172] [ 30.746515] [ 30.746782] Allocated by task 212: [ 30.747269] kasan_save_stack+0x22/0x50 [ 30.747846] kasan_set_track+0x25/0x30 [ 30.748402] __kasan_slab_alloc+0x59/0x70 [ 30.748997] kmem_cache_alloc+0x16b/0x370 [ 30.749574] vm_area_dup+0x20/0x160 [ 30.750099] __split_vma+0x170/0x950 [ 30.750630] split_vma+0xc6/0x110 [ 30.751135] mprotect_fixup+0x8d2/0xb30 [ 30.751699] do_mprotect_pkey+0x87e/0xd40 [ 30.752311] __x64_sys_mprotect+0x78/0xc0 [ 30.752908] do_syscall_64+0x3f/0x90 [ 30.753441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754166] [ 30.754427] Freed by task 212: [ 30.754879] kasan_save_stack+0x22/0x50 [ 30.755438] kasan_set_track+0x25/0x30 [ 30.755998] kasan_save_free_info+0x2b/0x50 [ 30.756597] __kasan_slab_free+0x10a/0x190 [ 30.757224] kmem_cache_free+0x10d/0x4d0 [ 30.757807] rcu_core+0x8c8/0x2860 [ 30.758302] __do_softirq+0x1b7/0x7d4 [ 30.758863] [ 30.759101] Last potentially related work creation: [ 30.759769] kasan_save_stack+0x22/0x50 [ 30.760330] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761706] remove_vma+0x139/0x170 [ 30.762229] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762873] do_vmi_munmap+0x1f1/0x2b0 [ 30.763415] __vm_munmap+0x138/0x3a0 [ 30.763949] __x64_sys_munmap+0x59/0x80 [ 30.764503] do_syscall_64+0x3f/0x90 [ 30.765045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765776] [ 30.766017] The buggy address belongs to the object at ffff888019fc0488 [ 30.766017] which belongs to the cache vm_area_struct of size 168 [ 30.767699] The buggy address is located 88 bytes inside of [ 30.767699] freed 168-byte region [ffff888019fc0488, ffff888019fc0530) [ 30.769283] [ 30.769525] The buggy address belongs to the physical page: [ 30.770270] page:00000000104afab8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fc0 [ 30.771502] memcg:ffff8880146ce501 [ 30.771998] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772725] page_type: 0xffffffff() [ 30.773231] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.774263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146ce501 [ 30.775299] page dumped because: kasan: bad access detected [ 30.776047] [ 30.776282] Memory state around the buggy address: [ 30.776935] ffff888019fc0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.777903] ffff888019fc0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.778865] >ffff888019fc0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.779810] ^ [ 30.780647] ffff888019fc0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.781600] ffff888019fc0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.782575] ================================================================== [ 30.783800] Disabling lock debugging due to kernel taint [ 32.964733] BUG: Bad rss-counter state mm:00000000383dee76 type:MM_FILEPAGES val:33 [ 32.965746] BUG: Bad rss-counter state mm:00000000383dee76 type:MM_ANONPAGES val:22 [ 33.442905] BUG: Bad rss-counter state mm:000000001427e631 type:MM_FILEPAGES val:33 [ 33.444024] BUG: Bad rss-counter state mm:000000001427e631 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56059' (ECDSA) to the list of known hosts. 2023/06/20 17:35:49 fuzzer started 2023/06/20 17:35:49 dialing manager at localhost:36067 2023/06/20 17:35:49 checking machine... 2023/06/20 17:35:49 checking revisions... [ 34.152810] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:35:50 testing simple program... [ 34.200104] cgroup: Unknown subsys name 'net' [ 34.259455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fedbeccec20 CR3=000000000d9a6000 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=dc3a809e0b68e69a86401dcc601ea531 XMM02=000000000011a5a0d59e07bde36eea69 XMM03=000000000011a6c8ec2efd57dc4c00df XMM04=dc43b0e2900f3c8800000000000ae988 XMM05=112499291306dcab00000000001327b0 XMM06=6b2f1958ba9283d00000000000131550 XMM07=fb795ef6d65770560000000000121898 XMM08=2c67c8bc2e329bc3000000000011a6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=00007ffe73c28190 RDX=ffff888015efd1c0 RSI=ffffffff836362f2 RDI=0000000000000005 RBP=ffff88800fbe7e60 RSP=ffff88800fbe7b48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a5700000a57 R12=00000000000000a4 R13=00007ffe73c28190 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450c48d RFL=00040293 [--S-A-C] 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 00007fa9e38f0900 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=00007fa9e3ea7618 CR3=0000000017d10000 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