Hello, syzbot found the following issue on: HEAD commit: 3f86ed6ec0b3 Merge tag 'arc-6.6-rc1' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=142a0e00680000 kernel config: https://syzkaller.appspot.com/x/.config?x=ff0db7a15ba54ead dashboard link: https://syzkaller.appspot.com/bug?extid=55cc72f8cc3a549119df compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17ff1fa8680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1445ba2fa80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/15ea526c030f/disk-3f86ed6e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e8f0baca67e5/vmlinux-3f86ed6e.xz kernel image: https://storage.googleapis.com/syzbot-assets/e39fafbb687d/bzImage-3f86ed6e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f82bb81a1d50/mount_0.gz The issue was bisected to: commit 617c28ecab22d98a3809370eb6cb50fa24b7bfe1 Author: Yin Fengwei <fengwei.yin@xxxxxxxxx> Date: Wed Aug 2 15:14:05 2023 +0000 filemap: batch PTE mappings bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13c37c58680000 final oops: https://syzkaller.appspot.com/x/report.txt?x=10237c58680000 console output: https://syzkaller.appspot.com/x/log.txt?x=17c37c58680000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+55cc72f8cc3a549119df@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 617c28ecab22 ("filemap: batch PTE mappings") BUG: Bad page map in process syz-executor332 pte:fffff8ce8c120 pmd:79462067 page:ffffea0001cc5cc0 refcount:9 mapcount:-1 mapping:ffff8880774b1b50 index:0x3 pfn:0x73173 head:ffffea0001cc5c00 order:2 entire_mapcount:0 nr_pages_mapped:8388607 pincount:0 memcg:ffff888015e5a000 aops:xfs_address_space_operations ino:244a dentry name:"bus" flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001cc5c01 dead000000000122 dead000000000400 raw: 0000000000000001 0000000000000000 00000000fffffffe 0000000000000000 head: 00fff0000000816c ffffea00007c9948 ffff888013245030 ffff8880774b1b50 head: 0000000000000000 ffff888027450e00 00000009ffffffff ffff888015e5a000 page dumped because: bad pte page_owner tracks the page as allocated page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5036, tgid 5036 (syz-executor332), ts 61415422939, free_ts 21789924659 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31ec/0x3370 mm/page_alloc.c:3183 __alloc_pages+0x255/0x670 mm/page_alloc.c:4439 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308 filemap_alloc_folio+0xde/0x500 mm/filemap.c:979 ra_alloc_folio mm/readahead.c:468 [inline] page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524 do_sync_mmap_readahead+0x444/0x850 filemap_fault+0x7d3/0x1710 mm/filemap.c:3294 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354 __do_fault+0x133/0x4e0 mm/memory.c:4204 do_read_fault mm/memory.c:4568 [inline] do_fault mm/memory.c:4705 [inline] do_pte_missing mm/memory.c:3669 [inline] handle_pte_fault mm/memory.c:4978 [inline] __handle_mm_fault mm/memory.c:5119 [inline] handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239 __get_user_pages_locked mm/gup.c:1504 [inline] get_dump_page+0x146/0x2b0 mm/gup.c:2018 dump_user_range+0x126/0x910 fs/coredump.c:913 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6355 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 addr:0000000020006000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff8880774b1b50 index:5 file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio CPU: 1 PID: 5036 Comm: syz-executor332 Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_bad_pte+0x581/0x5c0 mm/memory.c:535 zap_pte_range mm/memory.c:1458 [inline] zap_pmd_range mm/memory.c:1573 [inline] zap_pud_range mm/memory.c:1602 [inline] zap_p4d_range mm/memory.c:1623 [inline] unmap_page_range+0x1a76/0x3300 mm/memory.c:1644 unmap_vmas+0x209/0x3a0 mm/memory.c:1731 exit_mmap+0x297/0xc50 mm/mmap.c:3210 __mmput+0x115/0x3c0 kernel/fork.c:1349 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x612/0x2290 kernel/exit.c:861 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 get_signal+0x175d/0x1840 kernel/signal.c:2892 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff93b1d0eb9 Code: Unable to access opcode bytes at 0x7ff93b1d0e8f. RSP: 002b:00007ffc50f66f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007ff93b1d0eb9 RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240 R13: 00007ffc50f67188 R14: 0000000000000001 R15: 00007ffc50f66f50 </TASK> BUG: Bad page map in process syz-executor332 pte:fffff8ce8d120 pmd:79462067 page:ffffea0001cc5c80 refcount:9 mapcount:-1 mapping:ffff8880774b1b50 index:0x2 pfn:0x73172 head:ffffea0001cc5c00 order:2 entire_mapcount:0 nr_pages_mapped:8388606 pincount:0 memcg:ffff888015e5a000 aops:xfs_address_space_operations ino:244a dentry name:"bus" flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001cc5c01 ffffea0001cc5c90 ffffea0001cc5c90 raw: 0000000000000001 0000000000000000 00000000fffffffe 0000000000000000 head: 00fff0000000816c ffffea00007c9948 ffff888013245030 ffff8880774b1b50 head: 0000000000000000 ffff888027450e00 00000009ffffffff ffff888015e5a000 page dumped because: bad pte page_owner tracks the page as allocated page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5036, tgid 5036 (syz-executor332), ts 61415422939, free_ts 21789914922 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31ec/0x3370 mm/page_alloc.c:3183 __alloc_pages+0x255/0x670 mm/page_alloc.c:4439 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308 filemap_alloc_folio+0xde/0x500 mm/filemap.c:979 ra_alloc_folio mm/readahead.c:468 [inline] page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524 do_sync_mmap_readahead+0x444/0x850 filemap_fault+0x7d3/0x1710 mm/filemap.c:3294 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354 __do_fault+0x133/0x4e0 mm/memory.c:4204 do_read_fault mm/memory.c:4568 [inline] do_fault mm/memory.c:4705 [inline] do_pte_missing mm/memory.c:3669 [inline] handle_pte_fault mm/memory.c:4978 [inline] __handle_mm_fault mm/memory.c:5119 [inline] handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239 __get_user_pages_locked mm/gup.c:1504 [inline] get_dump_page+0x146/0x2b0 mm/gup.c:2018 dump_user_range+0x126/0x910 fs/coredump.c:913 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6355 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 addr:0000000020007000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff8880774b1b50 index:6 file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio CPU: 0 PID: 5036 Comm: syz-executor332 Tainted: G B 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_bad_pte+0x581/0x5c0 mm/memory.c:535 zap_pte_range mm/memory.c:1458 [inline] zap_pmd_range mm/memory.c:1573 [inline] zap_pud_range mm/memory.c:1602 [inline] zap_p4d_range mm/memory.c:1623 [inline] unmap_page_range+0x1a76/0x3300 mm/memory.c:1644 unmap_vmas+0x209/0x3a0 mm/memory.c:1731 exit_mmap+0x297/0xc50 mm/mmap.c:3210 __mmput+0x115/0x3c0 kernel/fork.c:1349 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x612/0x2290 kernel/exit.c:861 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 get_signal+0x175d/0x1840 kernel/signal.c:2892 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff93b1d0eb9 Code: Unable to access opcode bytes at 0x7ff93b1d0e8f. RSP: 002b:00007ffc50f66f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007ff93b1d0eb9 RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240 R13: 00007ffc50f67188 R14: 0000000000000001 R15: 00007ffc50f66f50 </TASK> BUG: Bad page map in process syz-executor332 pte:fffff8ce8e120 pmd:79462067 page:ffffea0001cc5c40 refcount:9 mapcount:-1 mapping:ffff8880774b1b50 index:0x1 pfn:0x73171 head:ffffea0001cc5c00 order:2 entire_mapcount:0 nr_pages_mapped:8388605 pincount:0 memcg:ffff888015e5a000 aops:xfs_address_space_operations ino:244a dentry name:"bus" flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000202 ffffea0001cc5c01 dead000000000122 fffffffdffffffff raw: 0000000400000000 0000000000000000 00000000fffffffe 0000000000000000 head: 00fff0000000816c ffffea00007c9948 ffff888013245030 ffff8880774b1b50 head: 0000000000000000 ffff888027450e00 00000009ffffffff ffff888015e5a000 page dumped because: bad pte page_owner tracks the page as allocated page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5036, tgid 5036 (syz-executor332), ts 61415422939, free_ts 21789904946 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31ec/0x3370 mm/page_alloc.c:3183 __alloc_pages+0x255/0x670 mm/page_alloc.c:4439 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308 filemap_alloc_folio+0xde/0x500 mm/filemap.c:979 ra_alloc_folio mm/readahead.c:468 [inline] page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524 do_sync_mmap_readahead+0x444/0x850 filemap_fault+0x7d3/0x1710 mm/filemap.c:3294 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354 __do_fault+0x133/0x4e0 mm/memory.c:4204 do_read_fault mm/memory.c:4568 [inline] do_fault mm/memory.c:4705 [inline] do_pte_missing mm/memory.c:3669 [inline] handle_pte_fault mm/memory.c:4978 [inline] __handle_mm_fault mm/memory.c:5119 [inline] handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239 __get_user_pages_locked mm/gup.c:1504 [inline] get_dump_page+0x146/0x2b0 mm/gup.c:2018 dump_user_range+0x126/0x910 fs/coredump.c:913 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6355 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 addr:0000000020008000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff8880774b1b50 index:7 file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio CPU: 1 PID: 5036 Comm: syz-executor332 Tainted: G B 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_bad_pte+0x581/0x5c0 mm/memory.c:535 zap_pte_range mm/memory.c:1458 [inline] zap_pmd_range mm/memory.c:1573 [inline] zap_pud_range mm/memory.c:1602 [inline] zap_p4d_range mm/memory.c:1623 [inline] unmap_page_range+0x1a76/0x3300 mm/memory.c:1644 unmap_vmas+0x209/0x3a0 mm/memory.c:1731 exit_mmap+0x297/0xc50 mm/mmap.c:3210 __mmput+0x115/0x3c0 kernel/fork.c:1349 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x612/0x2290 kernel/exit.c:861 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 get_signal+0x175d/0x1840 kernel/signal.c:2892 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff93b1d0eb9 Code: Unable to access opcode bytes at 0x7ff93b1d0e8f. RSP: 002b:00007ffc50f66f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007ff93b1d0eb9 RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240 R13: 00007ffc50f67188 R14: 0000000000000001 R15: 00007ffc50f66f50 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
