ci starts bisection 2023-03-31 21:30:34.922115857 +0000 UTC m=+205575.368463863 bisecting fixing commit since 4da34b7d175dc99b8befebd69e96546c960d526c building syzkaller on c0b80a55c9c8cfe75e77c555ed0d4ae7aa373cc2 ensuring issue is reproducible on original commit 4da34b7d175dc99b8befebd69e96546c960d526c testing commit 4da34b7d175dc99b8befebd69e96546c960d526c gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 167173651dc645ae6e59625ed4c7a644f66cd83690a6002c48f21ad1c2f42135 all runs: crashed: general protection fault in d_flags_for_inode testing current HEAD 5a57b48fdfcb1e196292665d87fac46180344f8a testing commit 5a57b48fdfcb1e196292665d87fac46180344f8a gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ae4756ab9b9645bcc47d08b552a48f848c1d164e80faf97a551bc8a8d758685a all runs: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync revisions tested: 2, total time: 30m56.16887991s (build: 22m54.644101756s, test: 7m3.550738843s) the crash still happens on HEAD commit msg: Merge tag 'platform-drivers-x86-v6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 crash: KASAN: out-of-bounds Write in end_buffer_read_sync ================================================================== BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:323 [inline] BUG: KASAN: out-of-bounds in end_buffer_read_sync+0x5c/0x90 fs/buffer.c:161 Write of size 4 at addr ffffc90005f779a8 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x60/0xa0 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x118/0x130 mm/kasan/report.c:536 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:187 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] put_bh include/linux/buffer_head.h:323 [inline] end_buffer_read_sync+0x5c/0x90 fs/buffer.c:161 end_bio_bh_io_sync+0xa9/0xf0 fs/buffer.c:2703 req_bio_endio block/blk-mq.c:795 [inline] blk_update_request+0x2ee/0x1180 block/blk-mq.c:927 blk_mq_end_request+0x46/0x70 block/blk-mq.c:1054 blk_complete_reqs+0xa0/0xd0 block/blk-mq.c:1132 __do_softirq+0x1d0/0x901 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x548/0x8c0 kernel/smpboot.c:164 kthread+0x294/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the virtual mapping at [ffffc90005f70000, ffffc90005f79000) created by: kernel_clone+0xb8/0x5f0 kernel/fork.c:2679 The buggy address belongs to the physical page: page:ffffea0000a7f780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29fde flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 7776, tgid 7776 (syz-executor.0), ts 111894511702, free_ts 104179737176 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1c7/0x490 mm/page_alloc.c:5592 vm_area_alloc_pages mm/vmalloc.c:2953 [inline] __vmalloc_area_node mm/vmalloc.c:3029 [inline] __vmalloc_node_range+0x7ed/0xfc0 mm/vmalloc.c:3199 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:979 [inline] copy_process+0x10db/0x6b40 kernel/fork.c:2095 kernel_clone+0xb8/0x5f0 kernel/fork.c:2679 __do_sys_clone+0xa1/0xe0 kernel/fork.c:2820 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5c7/0xa30 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page_list+0x172/0xbc0 mm/page_alloc.c:3529 release_pages+0x31c/0x10c0 mm/swap.c:1042 tlb_batch_pages_flush+0x85/0x160 mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0x110/0x6c0 mm/mmu_gather.c:391 exit_mmap+0x1cc/0x540 mm/mmap.c:3042 __mmput+0xf3/0x440 kernel/fork.c:1204 exit_mm kernel/exit.c:563 [inline] do_exit+0x885/0x2470 kernel/exit.c:856 do_group_exit+0xb0/0x250 kernel/exit.c:1019 get_signal+0x1d26/0x1f90 kernel/signal.c:2859 arch_do_signal_or_restart+0x75/0x5b0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:297 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffffc90005f77880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90005f77900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90005f77980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90005f77a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90005f77a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================