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[syzbot] [exfat?] KMSAN: kernel-infoleak in pipe_read | 2 (5) | 2024/10/31 16:39 |
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[syzbot] [exfat?] KMSAN: kernel-infoleak in pipe_read | 2 (5) | 2024/10/31 16:39 |
===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:300 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:328 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185 copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362 pipe_read+0x88c/0x21a0 fs/pipe.c:327 new_sync_read fs/read_write.c:484 [inline] vfs_read+0xcdf/0xf50 fs/read_write.c:565 ksys_read+0x240/0x4b0 fs/read_write.c:708 __do_sys_read fs/read_write.c:717 [inline] __se_sys_read fs/read_write.c:715 [inline] __x64_sys_read+0x93/0xe0 fs/read_write.c:715 x64_sys_call+0x314c/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: memcpy_to_iter lib/iov_iter.c:65 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0xe5a/0x2b30 lib/iov_iter.c:185 copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:189 [inline] shmem_file_read_iter+0x860/0xf80 mm/shmem.c:3241 do_iter_readv_writev+0x88a/0xa30 vfs_iter_read+0x278/0x760 fs/read_write.c:909 lo_read_simple drivers/block/loop.c:283 [inline] do_req_filebacked drivers/block/loop.c:516 [inline] loop_handle_cmd drivers/block/loop.c:1909 [inline] loop_process_work+0x2111/0x3760 drivers/block/loop.c:1944 loop_workfn+0x48/0x60 drivers/block/loop.c:1968 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:123 [inline] iterate_and_advance2 include/linux/iov_iter.h:304 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x1299/0x30c0 lib/iov_iter.c:483 copy_folio_from_iter_atomic include/linux/uio.h:201 [inline] generic_perform_write+0x8d1/0x1080 mm/filemap.c:4067 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3293 do_iter_readv_writev+0x88a/0xa30 vfs_iter_write+0x44d/0xd40 fs/read_write.c:974 lo_write_bvec drivers/block/loop.c:243 [inline] lo_write_simple drivers/block/loop.c:264 [inline] do_req_filebacked drivers/block/loop.c:511 [inline] loop_handle_cmd drivers/block/loop.c:1909 [inline] loop_process_work+0x15fb/0x3760 drivers/block/loop.c:1944 loop_workfn+0x48/0x60 drivers/block/loop.c:1968 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4774 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof mm/mempolicy.c:2344 [inline] folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2351 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1009 __filemap_get_folio+0xac4/0x1550 mm/filemap.c:1951 block_write_begin+0x6e/0x2b0 fs/buffer.c:2221 exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434 exfat_extend_valid_size fs/exfat/file.c:553 [inline] exfat_file_write_iter+0x771/0x12a0 fs/exfat/file.c:598 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xb2b/0x1540 fs/read_write.c:679 ksys_pwrite64 fs/read_write.c:786 [inline] __do_sys_pwrite64 fs/read_write.c:794 [inline] __se_sys_pwrite64 fs/read_write.c:791 [inline] __x64_sys_pwrite64+0x2c5/0x3b0 fs/read_write.c:791 x64_sys_call+0xc16/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Bytes 0-1023 of 1024 are uninitialized Memory access of size 1024 starts at ffff88801341b000 Data copied to user address 000055556e1237a0 CPU: 0 UID: 0 PID: 5806 Comm: syz-executor Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 =====================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/11/30 06:48 | upstream | 509f806f7f70 | 68914665 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/10/31 09:02 | upstream | 4236f913808c | fb888278 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/11/30 00:29 | upstream | 509f806f7f70 | 68914665 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/11/30 00:29 | upstream | 509f806f7f70 | 68914665 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/10/31 04:40 | upstream | 4236f913808c | fb888278 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/10/31 04:40 | upstream | 4236f913808c | fb888278 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/10/31 10:57 | upstream | 4236f913808c | fb888278 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-386-root | KMSAN: kernel-infoleak in pipe_read | ||
2024/10/31 10:52 | upstream | 4236f913808c | fb888278 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-386-root | KMSAN: kernel-infoleak in pipe_read |