syzkaller login: [ 31.509935] sshd (213) used greatest stack depth: 24128 bytes left [ 31.511739] BUG: Bad rss-counter state mm:00000000cc5b2eb6 type:MM_FILEPAGES val:33 [ 31.513722] BUG: Bad rss-counter state mm:00000000cc5b2eb6 type:MM_ANONPAGES val:22 [ 31.673243] ================================================================== [ 31.674224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.675231] Read of size 8 at addr ffff88800f0136b0 by task sshd/220 [ 31.676178] [ 31.676421] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.677378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.678441] Call Trace: [ 31.678787] [ 31.679094] dump_stack_lvl+0x91/0xf0 [ 31.679626] print_report+0xcc/0x620 [ 31.680144] ? __virt_addr_valid+0x102/0x340 [ 31.680747] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681423] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682086] kasan_report+0xbe/0xf0 [ 31.682611] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.683295] vma_interval_tree_remove+0xc75/0xec0 [ 31.683962] vma_prepare+0xc54/0x11a0 [ 31.684494] __split_vma+0x5af/0x950 [ 31.685017] ? __pfx___split_vma+0x10/0x10 [ 31.685603] ? find_held_lock+0x2c/0x110 [ 31.686178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.686806] ? lock_is_held_type+0x9f/0x120 [ 31.687397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.688065] ? mtree_range_walk+0x632/0x900 [ 31.688676] ? mas_walk+0x5c7/0x7c0 [ 31.689221] do_vmi_munmap+0x1f1/0x2b0 [ 31.689762] mmap_region+0x1f9/0x2660 [ 31.690295] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.690862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.691649] ? __pfx_lock_acquire+0x10/0x10 [ 31.692238] ? __pfx_mmap_region+0x10/0x10 [ 31.692835] ? security_mmap_addr+0x7d/0xa0 [ 31.693422] ? get_unmapped_area+0x1f5/0x3f0 [ 31.694031] do_mmap+0x854/0xf00 [ 31.694518] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.695065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.695687] ksys_mmap_pgoff+0x3af/0x500 [ 31.696246] do_syscall_64+0x3f/0x90 [ 31.696794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697501] RIP: 0033:0x7f8abe659d82 [ 31.697999] 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 [ 31.700365] RSP: 002b:00007ffca72de3f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.701368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8abe659d82 [ 31.702295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8abda93000 [ 31.703234] RBP: 00007f8abda93000 R08: 0000000000000009 R09: 0000000000001000 [ 31.704171] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d96cf67b20 [ 31.705119] R13: 00007ffca72de410 R14: 00007ffca72de440 R15: 00007ffca72de7a0 [ 31.706067] [ 31.706386] [ 31.706621] Allocated by task 213: [ 31.707086] kasan_save_stack+0x22/0x50 [ 31.707644] kasan_set_track+0x25/0x30 [ 31.708189] __kasan_slab_alloc+0x59/0x70 [ 31.708768] kmem_cache_alloc+0x16b/0x370 [ 31.709360] vm_area_dup+0x20/0x160 [ 31.709868] __split_vma+0x170/0x950 [ 31.710382] split_vma+0xc6/0x110 [ 31.710859] mprotect_fixup+0x8d2/0xb30 [ 31.711411] do_mprotect_pkey+0x87e/0xd40 [ 31.711985] __x64_sys_mprotect+0x78/0xc0 [ 31.712560] do_syscall_64+0x3f/0x90 [ 31.713090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.713804] [ 31.714038] Freed by task 213: [ 31.714475] kasan_save_stack+0x22/0x50 [ 31.715031] kasan_set_track+0x25/0x30 [ 31.715579] kasan_save_free_info+0x2b/0x50 [ 31.716158] __kasan_slab_free+0x10a/0x190 [ 31.716745] kmem_cache_free+0x10d/0x4d0 [ 31.717331] rcu_core+0x8c8/0x2860 [ 31.717822] __do_softirq+0x1b7/0x7d4 [ 31.718344] [ 31.718582] Last potentially related work creation: [ 31.719228] kasan_save_stack+0x22/0x50 [ 31.719787] __kasan_record_aux_stack+0x8e/0xa0 [ 31.720419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.721138] remove_vma+0x139/0x170 [ 31.721638] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.722244] do_vmi_munmap+0x1f1/0x2b0 [ 31.722782] __vm_munmap+0x138/0x3a0 [ 31.723302] __x64_sys_munmap+0x59/0x80 [ 31.723853] do_syscall_64+0x3f/0x90 [ 31.724378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.725090] [ 31.725327] The buggy address belongs to the object at ffff88800f013658 [ 31.725327] which belongs to the cache vm_area_struct of size 168 [ 31.726946] The buggy address is located 88 bytes inside of [ 31.726946] freed 168-byte region [ffff88800f013658, ffff88800f013700) [ 31.728492] [ 31.728727] The buggy address belongs to the physical page: [ 31.729471] page:0000000006dff1c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf013 [ 31.730680] memcg:ffff88800ef8bd01 [ 31.731152] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.731863] page_type: 0xffffffff() [ 31.732358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.733391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef8bd01 [ 31.734391] page dumped because: kasan: bad access detected [ 31.735127] [ 31.735363] Memory state around the buggy address: [ 31.736001] ffff88800f013580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.736959] ffff88800f013600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.737904] >ffff88800f013680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.738841] ^ [ 31.739485] ffff88800f013700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.740432] ffff88800f013780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.741385] ================================================================== [ 31.742580] Disabling lock debugging due to kernel taint [ 34.458895] BUG: Bad rss-counter state mm:000000008b1eac45 type:MM_FILEPAGES val:33 [ 34.460348] BUG: Bad rss-counter state mm:000000008b1eac45 type:MM_ANONPAGES val:22 [ 35.144492] BUG: Bad rss-counter state mm:00000000c7a3e111 type:MM_FILEPAGES val:33 [ 35.145950] BUG: Bad rss-counter state mm:00000000c7a3e111 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14109' (ECDSA) to the list of known hosts. 2023/06/21 04:31:51 fuzzer started 2023/06/21 04:31:51 dialing manager at localhost:36067 2023/06/21 04:31:51 checking machine... 2023/06/21 04:31:51 checking revisions... [ 35.798766] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:31:51 testing simple program... [ 35.852375] cgroup: Unknown subsys name 'net' [ 35.907989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800906f2a8 RCX=ffffffff83ab1913 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fcff4f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000095900000959 R12=0000000000000000 R13=0000000000000055 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0250 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 00007ffb6255c900 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=00007ffb62b13618 CR3=0000000009548000 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=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=00007f9de01f21f0 CR3=000000000f036000 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=e6b5044719a6f8a68e4368e9e8defe2b XMM02=000000000011d528ec2efd57dc4c00df XMM03=0000000000121c90b8ee5862dd794ca7 XMM04=4f7beb1832ded4e700000000000ae988 XMM05=19e9129bd510f2350000000000131c10 XMM06=f56b9254989318050000000000130a78 XMM07=e042d86d42eb936e0000000000121f10 XMM08=b8ee5862dd794ca7000000000011d588 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000